Electronic Systems Protection Product Catalogue the Burj Dubai will represent a formidable...

Electronic Systems ProtectionProduct Catalogue

Furse is a world leader in the design,

manufacture and supply of earthing and

lightning protection systems. Combining over

100 years’ technical expertise with an

enviable reputation for innovation, quality and

service, Furse is uniquely placed to provide a

‘Total Solution’ to all your earthing, lightning

and transient overvoltage protection needs.

Since 1998, the Furse brand has been included in the

product portfolio of the Thomas & Betts Corporation.

Thomas & Betts was founded in New York in 1898.

The corporate headquarters now reside in Memphis,

Tennessee with the company being listed on the New

York stock exchange. Thomas & Betts has now over

100 years of experience of successfully supplying

quality products to the market by using innovative

design and manufacturing techniques. A truly global

player having a presence in Europe, North & Central

America, Australia and the Far & Middle East.

Worldwide 13,000 employees are dedicated to

ensuring that Thomas & Betts is fast, flexible and

customer focused.

Whilst one of our core markets remains in electrical

products, Thomas & Betts also has leading brands

along with significant market share in emergency

lighting and fire detection, steel structures,

communications, electronic systems protection,

earthing and lightning protection. In recent years,

Thomas & Betts has developed a formidable safety

products division. This division serves as a key

knowledge platform, focusing on continued

product innovation and delivery of competitive

solutions to our customers. Furse, being one of the

leading brands within this division, benefits from

economies of scale in product development and

production, facilitating the further efficient

development of earthing, lightning protection and

electronic surge protection systems.

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Company background 2 – 5With over 100 years experience, Furse is the name you can rely on

The importance of lightning protection 6 – 7Key considerations identifying the need for both external and internal lightning protection for effective coveragainst lightning strikes

Technical design service 8 – 9Not only do we supply lightning protection and earthing materials, we will also design the system you need

Furse – Total solution to lightning protection 10Furse offers comprehensive solutions for all lightning protection needs

Electronic Systems Protection 11 – 84Transient overvoltages can destroy electronic equipment in an instant – find out how toget effective protection with the Furse ESP range

Introduction to the new standard BS EN/IEC 62305 85 – 101An overview of BS EN/IEC 62305, its impact on lightning protection and the support and advice available from Furse

Index 102 – 103Usefully arranged by application and product

Customer services 104Sales and Technical enquiries, how to order, and Furse on the web

Contents

Permission to reproduce extracts from British Standards is granted by BSI under Licence No. 2009ET0001. British Standards

can be obtained in PDF or hard copy formats from the BSI online shop: http://www.bsigroup.com/Shop or by contacting

BSI Customer Services for hard copies only: Tel: +44 (0)20 8996 9001, Email: mailto:[email protected] Q06054

Contents

A world of experienceSince 1893, when William Joseph Furse bought a smallsteeplejacking company, Furse has been proud of ourcommitment to innovation and quality.

Throughout the decades of vast technological change,Furse has adapted and expanded accordingly,providing world leading structural lightningprotection, earthing and transient overvoltageprotection. With offices and strong distributionnetworks throughout the Far East, Furse is uniquelyplaced to provide total lightning protection solutions.

Furthermore, by working on projects in over 120countries, many as prestigious as the Petronas Towersin Kuala Lumpur, and Disneyland Hong Kong, Fursehas developed the experience and expertise that willensure we continue to lead the field throughout the21st century.

Thomas & BettsIn 1998, Furse became part of the Thomas & BettsCorporation, who, like ourselves, has over 100 years ofelectrical engineering experience.

As one of the world’s leading manufacturers ofelectrical and electronic components, Thomas & Bettsis renowned for their interconnection and cablemanagement products.

With many of its well known brands availableworldwide, and its continued focus on productdevelopment and innovation, Thomas & Betts remainsthe assured choice for competitive solutions within theFar East market.

Introduction | Company background

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Company background

Expertise and know howAt Furse, our wealth of knowledge in structurallightning protection, earthing and transientovervoltage protection gives our engineers the abilityto offer leading edge product development andunparalleled technical support.

From dedicated teams of design engineers developingnew products to meet the ever-changing demands ofthe marketplace, to accredited engineers that candesign lightning protection and earth electrodesystems to the relevant British Standard (BS) or anyother recognised national or international standard,Furse technical expertise is focused on the customer.

Our expertise has also been confirmed by ourcontinuing contributions to British, European andinternational standards for lightning and transientovervoltage protection (BSI, CENELEC and IEC) andearthing (BSI).

Commitment to qualityFor us, our ISO 9001 Registration is only the start ofour commitment to quality.

A commitment that applies equally to all areas ofFurse – from design and development tomanufacturing and customer services.

The support you needAt Furse we believe in sharing our knowledge withyou, so you can make a properly informed decision –whether it’s on the phone, through a presentation, orwith our comprehensive technical literature.

Whatever your query, technical support is readilyavailable either from our teams of engineers, or fromour offices throughout the Far East and further afield,all supported by an international network ofdistributors.

Additionally, to help you identify what protection youdo (and don’t) need, in many countries, free of chargesite surveys are available.

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www.furse.com Company literature | Introduction

The best products, the best guidance... for total lightning protectionFurse offers the very best in terms of product development, service and support for all parties involved in lightning,earthing and transient overvoltage protection.

Our services and products cover the entire scope of lightning protection, from air terminals and conductors forstructural protection, earth rods, plates, bonds and clamps etc, together with exothermic welding for effectiveearthing, through to enhanced surge protection devices for equipotential bonding and for protecting essentialelectronic systems within structures.

In short, Furse offers the Total Solution to lightning protection.

We provide a comprehensive range of product literature to support our customers with product selection ortechnical information as required when preparing lightning protection systems. Details of our range of publicationsis provided below. Contact your local office today for further information and to request your copy.

Earthing & Lightning Protection Product CatalogueOur full range of copper and aluminium lightning protection products,essential for protecting external structures, including:

● Air terminals, bases and clamps

● Conductors

● Earthing materials, rods, fixings, clamps, earth bars and inspection pits

● Earth resistance testing equipment, compression tools and connectors

Electronic Systems Protection Product CatalogueOur full range of Surge Protection Devices (SPDs), essential for protectingagainst transient overvoltages caused by lightning and electrical switchingevents, including:

● Service entrance and equipotential bonding SPDs

● Protectors for mains power supplies

● Protectors for data communication and signal lines

● Protectors for telephone lines and computer networks

FurseWELD Exothermic Welding Product CatalogueComprehensive information on the FurseWELD exothermic welding system– our fast, easy and portable way of creating high quality, fault tolerantjoints without any external power or heat source. Covering bothFurseWELD and SureSHOT methods for forming permanent electricalconnections.

FurseWELD Exothermic WeldingProduct Catalogue

Electronic Systems ProtectionProduct Catalogue

Earthing & Lightning ProtectionProduct Catalogue

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www.furse.comIntroduction | What our customers say about us

What our customers say about us

At Furse, we are fully committed to providing the best value solutions to our customers’ earthing,lightning and transient overvoltage protection needs. Below is a sample of our customers’ commentsregarding our service.

“We know we can rely on the quality of Furse products and areensured of excellent technical support whenever required.They havean extensive range to cover our requirements as an installer ofLightning Protection, Earthing and Surge Protection, that is whythey are our #1 supplier”

Colin C Clinkard, Director, BEST Services, Britain

“JointingTechnologies stock and distribute Furse products as we believe that they are theright manufacturer to provide a range of products to suit the ever-changing earthing &lightning protection marketplace.We have worked closely with Furse for over 12 years nowon many contracts including HeathrowT5, ChannelTunnel rail link, London Undergroundupgrade etc. Regular communication with their sales engineers ensures not only stock productsare available when and where required but also customized products are available if needed tokeep our projects running on time and within budget.”

Nigel Ridgway, Operations Manager, Jointing Technologies, Britain

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www.furse.com Sample of projects | Introduction

Sample of projects

Graha Energi Building, JakartaThe Graha Energi building is a new office developmentsited at the junction of Jakarta’s premier commercialdistrict, Sudirman Central. Within its 43 storeys, theGraha Energy building provides high quality officesuites, restaurants and parking to Jakarta’s nationaland international business community.

Lightning protection may seem a small part of such aconsiderable development, however it remains a vital,integral component. A lightning protection scheme isessential to protect the structure, the personnelworking within and the high technology electronicsystems used for everyday commerce from harm.

Furse was appointed to provide both structurallightning protection and FurseWELD exothermicwelding solutions to the Graha Energi development.

Burj DubaiAlready the world’s tallest building and still underconstruction, the Burj Dubai will represent aformidable achievement as part of the developmentof downtown Dubai. On completion, this prestigiousstructure will provide hotels, residential suites, officesand leisure facilities for many Dubai residents.

Protection of tall structures is an exacting science,considering the need not only to protect the top butalso the sides of the building from lightning damage.Innovative architecture presents many challenges inlightning protection scheme design.

Furse has substantial experience of providingprotection for tall structures, having providedlightning protection schemes for many developmentsin the Middle and Far East, including the Burj Al Arab7 star hotel in Dubai and Petronas Towers in Malaysia.

Singapore Mass Rapid TransitSystem – Circle LineCurrently under construction, the Circle Line is thelatest development as part of Singapore’s Mass RapidTransit (MRT) system which forms the backbone of thecity’s railway system, serving more than a quarter ofSingapore’s population with a network spanning theentire city-state.

Scheduled for completion in 2011 the Circle Line willconsist of 29 stations, connecting with all other lineswithin the network at numerous stations, thusoffering to Singapore’s residents a viable andimproving alternative to road transport.

With the protection of passengers and vitalelectronic systems paramount, Furse has beencommissioned to provide the essential lightningprotection system for this project. Furse has manyyears experience working on rail specific projects,with products tailored for this market.

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Why is lightningprotection soimportant?Lightning is one of nature’s most powerful anddestructive phenomena. Lightning dischargescontain awesome amounts of electrical energyand even though each strike may last only ashort duration, typically 200 microseconds, it is avery real cause of damage and destruction.

The effects of a direct strike are obvious andimmediately apparent – fires, structural damage,disruption to services, personal injury and even death.However, the secondary effects of lightning – theshort duration, high voltage spikes called transientovervoltages - can, and do, cause equally catastrophic,if less visually obvious, damage to electronic systemswithin structures.

Lightning can have a significant impact on anorganisation. From risk of serious injury to personnelthrough to loss of critical services such as mains power,and significant damage to servers, PCs or electricalmachinery, lightning is clearly a major threat. In theworst case scenario an organisation might go out ofbusiness as a result of lightning damage.

Reliable lightning protection needs to be applied tocounter these threats. Furthermore, any lightningprotection scheme must encompass both structurallightning protection and transient overvoltageprotection, since structural lightning protection alonecannot and will not protect the electronic systemswithin a building from transient overvoltage damage.

At Furse, we are fully aware that all these risks needto be considered and protected against whendeveloping a lightning protection scheme. With over100 years of experience, our support and expertise hasassisted thousands of businesses, both large and small,to achieve effective protection against lightning.

The Furse approach to externallightning protectionA structural lightning protection system is designed toprotect the fabric of a structure and the lives of thepeople inside by channelling the lightning strike in asafe and controlled manner to the earth terminationnetwork. Using the Faraday Cage principle oflightning protection, as advocated by the majority ofnational and international standards, Furse offers arange of air terminals, bases and clamps for the airtermination network and an extensive range ofdown conductors and fixings. Furse only supply highquality materials and fixings, since it only takes asingle sub-standard component to compromise theperformance of a structural lightning protection –or earthing – system.

The importance of a high qualityearth termination networkThe earth termination network is the means throughwhich the current is dissipated to the general mass ofearth. Furse offers all the materials and fittingsnecessary for an effective earthing system, includingearth rods and plates, clamps and inspection pits.

Furse also manufactures and supplies the FurseWELDexothermic welding system; a fast, easy and portableway of creating high quality, fault tolerant jointswithout any external power or heat source.

Please contact Furse for more information aboutearthing & lightning protection or FurseWELDproducts, or to request our catalogues.

The importance of lightning protection

Introduction | The importance of lightning protection

Furse has extensive experience of designing and supplying lightningprotection systems for tall structures, including Petronas Towers,

Malaysia and many new developments in the Far East

Fires from lightning strikes can cause major damage to structures

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www.furse.com The importance of lightning protection | Introduction

The main risk to internal systems is through transientovervoltages – large, very brief and potentially destructiveincreases in voltage within the electrical system.Transient overvoltages can be caused by:● the secondary effects of lightning strikes (either

between clouds or to ground) from a kilometre ormore, away

● the electrical switching of large inductive loads (suchas motors, transformers and electrical drives), orcapacitive loads (such as power factor correction)

Devastating effectsAlthough they last only thousandths or millionths of asecond, transient overvoltages can devastate modernelectronic systems:● disrupting system operations, through data

loss, data and software corruption andunexplained crashes

● degrading equipment components andcircuitry, shortening equipment lifetime andincreasing failures

● destroying components, circuit boards andI/O cards

● causing costly and unnecessary system downtime

Protection benefitsEffective transient overvoltage protection can prevent:● lost or destroyed data● equipment damage● repair work – especially costly for remote or

unmanned installations● the high cost of extended stoppages – sales lost to

competitors, lost production, deterioration orspoilage of work in progress

● loss of essential services – fire alarm, securitysystems, building management systems

● health and safety hazards caused by plantinstability, after loss of control

● fire risks and electric shock hazards

Please contact Furse for more information aboutElectronic Systems Protection products or services.

Transientovervoltage damageto the circuit board,left, is clear to see,but most damage isbarely visible, asbelow.

The importance of high qualityinternal lightning (electronicsystems) protectionElectronic systems have become central to virtuallyevery aspect of our lives from PCs and buildingmanagement systems in the office to automatedpetrol pumps and bar code scanners at thesupermarket. The ever-changing pace of technologicaldevelopment, and especially the headlong quest forminiaturisation, has created the scenario whereincreasingly lightning sensitive systems are placed atthe core of our society. Both the threat of damage tovital electronic systems, and the seriousness of theconsequences of that damage, are more real thanever before.

Most modern electronic systems are at risk:

● computers● data communication networks● building management systems● PABX telephone exchanges● CCTV equipment● fire and burglar alarms● telecom base stations● uninterruptible power supplies (UPSs)● programmable logic controllers (PLCs)● plant sensors● telemetry and data acquisition equipment.

Loss of these systems would cripple industrial,commercial and governmental organisations alike.

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Technical design service

Introduction | Technical design service

Since 1893 Furse has built up an enviablereputation for innovation and quality to becomea world leader in the provision of earthing andlightning protection systems. Combining over100 years technical knowledge with our work asactive contributors to National and InternationalStandards, Furse is uniquely placed to providesound practical advice on any aspect of yourlightning protection needs.

At Furse, our aim is simple – to save you time andmoney in the specification, design, planning andprocurement of structural lightning protection,transient overvoltage and earthing systems. Fromstraightforward advice on product selection throughto complete risk assessment, scheme design andconsultancy, Furse is geared to delivering a best-valuesolution to all our customers.

Furse technical designGiven the complexity of national and internationalearthing and lightning protection standards, confusionand misinterpretation can easily lead to budgetoverruns and costly extra time on site. To counter this,we offer a range of professional services to ourcustomers, including:

● Structural lightning and transient overvoltageprotection system design

● Earthing design

● Supply of comprehensive drawings

● Soil resistivity survey

● Full earth modelling analysis

● Earth resistance measuring

● Bespoke in-house and hosted trainingand seminars

Using the latest computer aided design anddraughting software our engineers can producedetailed or budgetary earth electrode and lightningprotection system designs, in compliance with anygiven standard and whatever the complexity ofsystem required.

Where necessary, we can also provide for theinstallation of earthing and lightning protectionsystems via our partnerships with specialist installers.

Structural lightning and transientovervoltage protectionIn order for Furse to design a structural and/ortransient overvoltage lightning protection system, weneed the following information:

● Design standard, e.g. BS EN 62305, NFPA 780,IEC 62305

● A dimensioned roof plan

● External elevations

● Construction details, e.g. steelwork, reinforcedconcrete, roofing materials, etc

● A single line diagram indicating voltage andcurrent for each electrical system, e.g. power, data,telephones, fire alarms, CCTV

● Details of essential equipment, e.g. networkservers, PLC controllers

Power earthing systemsTo design a power earth electrode system, we needthe following information:

● Design standard, e.g. BS 7430, BS 7354, Ansi IEEEStd 80, EATS 41-24 etc

● A dimensioned site plan

● Overall electrical single line diagram

● Soil resistivity survey results

● Earth fault current magnitude. (Due considerationshould be given to the proportion of currentflowing through cable sheaths or the aerial earthwires of overhead transmission lines)

● Earth fault current duration

There are a number of recognised national andinternational standards governing the provision ofearthing systems. Our design experience and technicalknowledge allow us to provide designs to any relevantstandard, including BS 7430, IEEE Std 80 andEATS 41-24. Given the complexity of many of thesestandards, using the Furse design service avoids anyconfusion or misinterpretation that could lead tobudget overruns or project delays.

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www.furse.com Technical design service | Introduction

Proper site surveys and analysis complementfully our in-house service. Through collation ofall relevant information from site, including soilresistivity measurements and earthing analysis,our engineers can produce bespoke earthingdesigns complete with drawings, calculationsand a detailed report, along with a structurallightning protection system if required.

Soil resistivity surveysInadequate or erroneous soil resistivity readings arelikely to result in a flawed design. Furse site surveystake multiple accurate soil resistivity readings atvarious depths across the proposed site to form thebasis of the whole earthing design.

Full earthing analysisFull earthing analysis determines the step and touchvoltages, earth potential rise and hot/cold siteclassification of the site generated by theinitial design.

Earth resistance measurementEarth resistance measurement is essential to ensurethat the installation meets the anticipated criteria laidout in the initial design. Furse has the technicalexperience to ensure that the measurementsaccurately reflect the true resistance of theearthing system.

Automated risk assessmentThe new Standard for lightning protection,BS EN/IEC 62305, promotes risk assessment as centraland critical to determining the level of lightningprotection system required. This complex riskassessment incorporates trial & error calculationswhich could take hours to process by hand – not themost profitable use of a consultant’s time!To assist, Furse technical team provides a riskassessment service using our proprietary riskevaluation software to process the complexcalculations required by BS EN/IEC 62305-2.Please contact Furse for more details about howautomated risk assessment can help you plan yourlightning protection systems.

Training and seminarsNot only do our engineers offer technical designservices, but also training courses are available toensure you or your team can acquire a greaterunderstanding of the nature, problems and solutionsto earthing and lightning protection requirements.

Courses can be tailored to individual needs and areheld at the Furse offices or other convenient locations.Contact Furse for further details.

The benefits of coming to FurseThere are many benefits of coming to Furse forearthing, lightning protection and electronic systemsprotection designs, including:

● Specialist advice from a fully qualified technicalteam, which focuses solely on lightning protectionissues and concerns

● Designs that comply with all relevant standards –national and international

● Our responsibility for providing a design that is safe

● Experience and the software to provide an ‘optimum’design – one that doesn’t use more earthing materialthan is necessary – saving you money

● Manufacturing experience & expertise – utilisingour knowledge of the products available to providea tailored design that can be installed using themost appropriate and up-to-date products

Total solution to lightning protection

Total solution to lighting protection

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TOTALSOLUTION

ExothermicWelding

Design &Planning

CoordinatedSPDs

Earth ElectrodeSystems

Earth Bonds &Clamps

LightningEquipotentialBonding SPDs

ConductorSystems

Air TerminationSystems

TOTALSOLUTION

Furse, the Total Solution to lightning protectionThis catalogue focuses on Electronic Systems Protection, an integral part of the comprehensive range of products andservices available through the Furse Total Solution to lightning protection.

The Furse Total Solution is the industry-leading approach to lightning protection, encompassing structural, earthingand transient overvoltage protection. This approach is fully reinforced by the new standard, BS EN/IEC 62305, whichemphasizes that structural lightning protection can no longer be considered in isolation to transient overvoltageprotection.

Our Total Solution offers all the relevant components for effective lightning protection, from air terminals and downconductors to protect structures, through to Surge Protection Devices to protect the vital electronic systems within.By providing the highest quality products, supported by practical advice and technical expertise, Furse remains theassured choice to ensure your business is fully protected against lightning strikes and transient overvoltage damage.

Contact Furse today to discuss how our full range of products and services can help protect your business fromlightning risk.

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Introduction 12 – 21What transients are and why you need protection 12 – 14

How to get effective protection 15 – 16

When and where to protect 17

Simplified product selection 18 – 19

How to apply protection and what to use 20 – 21

Protectors 22 – 84Mains power 22 – 41

Data communication and signal lines 42 – 58

Telephone and network 59 – 70

Communication and rail 71 – 80

Accessories 81 – 84

Electronic Systems Protection



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What transients are and why you need protection

Electronic Systems Protection | What transients are and why you need protection

Transient overvoltagesTransient overvoltages are short duration, highmagnitude voltages peaks with fast rising edges, alsoknown as surges. Often described as a “spike”,transient voltages can reach up to 6000V on alow-voltage consumer network, with no more thanmillisecond duration.

Lightning strikes are the most common source ofextreme transient overvoltages where total outage ofan unprotected system can occur with damage tocabling insulation through flashover potentiallyresulting in loss of life through fire and electric shock.

However, electrical and electronic equipment is alsocontinually stressed by hundreds of transients that occurevery day on the power supply network throughswitching operations of inductive loads such asair-conditioning units, lift motors and transformers.Switching transients may also occur as a result ofinterrupting short-circuit currents (such as fusesblowing). Although switching transients are of a lowermagnitude than lightning transients, they occur morefrequently and equipment failures unexpectedly occuroften after a time delay; degradation of electroniccomponents within the equipment is accelerated due tothe continual stress caused by these switching transients.

Transient overvoltages, whether caused by lightning orby electrical switching, have similar effects: disruption(e.g. data loss, RCD tripping), degradation (reducedequipment lifespan), damage (outright equipmentfailure, particularly concerning for essential servicessuch as fire and security alarm systems) and downtime– the biggest cost to any business such as lostproductivity and product spoilage, staff overtime,delays to customers and sales lost to competitors.

Protection against lightning andswitching transientsBS EN/IEC 62305 takes account of protection measureson metallic service lines (typically power, signal andtelecom lines) using transient overvoltage or surgeprotection devices (SPDs) against both direct lightningstrikes as well as the more common indirect lightningstrikes (often described as the secondary effects oflightning) and switching transients.

Standards such as BS EN/IEC 61643 series define thecharacteristics of lightning currents and voltages toenable reliable and repeatable testing of SPDs (as wellas lightning protection components). Although thesewaveforms may differ from actual transients, thestandardized forms are based upon years ofobservation and measurement (and in some casessimulation). In general they provide a fairapproximation of the real world transient.

Transient waveforms have a fast rising edge and alonger tail. They are described through their peak

value (or magnitude), rise time and their duration (orfall time). The duration is measured as the time takenfor the test transient to decay to half its peak value.

The figures below illustrate the common current andvoltage waveforms that are used to test SPDs formains, signal and telecom lines.

Lightning currents as a result of direct lightning strikesare represented by the simulated 10/350μs waveformwith a fast rise time and long decay that replicates thehigh energy content of direct lightning.

Transientovervoltage damageto the circuit board,left, is clear to see,but most damage isbarely visible, asbelow.

300 600 900 1200 1500

1

2

3

4

Time t (μs)

Surg

eV

olt

age

(kV

)

Vpeak@t =1.2μs

Vpeak@t = 10μs

10/700μs Waveform

1.2/50μs Waveform

Vpeak@t = 50μs2

Vpeak@t = 700μs2

Figures 1 & 2: The common current and voltage waveforms used totest SPDs for mains, signal and telecom lines

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www.furse.com What transients are and why you need protection | Electronic Systems Protection

Remote or indirect lightning flashes near thestructure (Source S2) or near a connected service tothe structure (Source S4) of up to 1km radius away(and hence far more common) are represented bythe 8/20μs waveform. Induced surges from directlightning flashes and switching sources are alsorepresented by this waveform. With a much shorterdecay or fall time relative to the 10/350μs waveform,the 8/20μs waveform presents significantly lessenergy (for an equivalent peak current) but is stilldevastating enough to damage electrical andelectronic equipment.

Damped currentwaveshape(8/20μs)

Ground Level

StructuralLPS

10/350μssurge current(Iimp)

Ground Level

1

8/20μssurge current

Ground Level

Induced Surges/Overvoltages

1

8/20μs surge current Strike up to 1km away

8/20μs

Ground Level

10/350μssurge current(Iimp)

(Iimp)2

(Iimp)2

BS EN/IEC 62305-1 recognises that failure of internalsystems (Damage Type D3) due to LightningElectromagnetic Impulse (LEMP) is possible from allpoints of strike to the structure or service – direct orindirect (all Sources: S1, S2, S3 and S4). To ensurecontinuous operation of critical systems even in theevent of a direct strike, SPDs are essential and aresuitably deployed, based on the source of surge andits intensity using the Lightning Protection Zones (LPZ)concept within BS EN/IEC 62305-4.

A series of zones are created within the structureaccording to the level of threat posed by the LEMPwith each zone to have successively less exposure tothe effects of lightning – for example LPZ 0A (outsidethe structure) where the threat of lightning currentsand fields are most severe being more onerous thanLPZ 3 (within the structure) where the threat oflightning is considerably reduced such that electronicscan be safely located within this zone.

Direct lightning can inject partial lightning currents ofthe 10/350μs waveform into a system where astructure with a structural Lightning Protection Systemreceives a direct strike (Source S1) or where lightningdirectly strikes an overhead service line (Source S3).

Figure 3: Illustration of lightning current flow from a direct strike to astructure (Source S1)

Figure 4: Illustration of lightning current flow from a direct strike to anearby service (Source S3)

Figure 5: Illustration of lightning current flow from a direct strike nearthe structure (Source S2)

Figure 6: Illustration of lightning current flow from lightning flashesnear connected services (Source S4)

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What transients are and why you need protection

Electronic Systems Protection | What transients are and why you need protection

Figure 7 illustrates the basic LPZ concept defined byprotection measures against LEMP as detailed inBS EN/IEC 62305-4. Equipment is protected againstboth direct and indirect lightning strikes to thestructure and connected services, with a LEMPProtection Measures System (LPMS). To achieve thisreduction in LEMP severity, from conducted surgecurrents and transient overvoltages, as well asradiated magnetic field effects, successive zones use acombination of shielding measures, bonding ofincoming metallic services such as water and gas andthe use of coordinated SPDs (further details can befound in “A Guide to BS EN 62305:2006 protectionagainst lightning”).

Given that the live cores of metallic electrical servicessuch as mains power, data and telecom cables cannotbe bonded directly to earth wherever a linepenetrates each LPZ, a suitable SPD is thereforeneeded. The SPD’s characteristics at the boundary ofeach given zone or installation location need to takeaccount of the surge energy they are to be subject toas well as ensure the transient overvoltages arelimited to safe levels for equipment within therespective zone.

The following table details the standardized testwaveforms with peak currents used to test SPDstypically located at each zone boundary.

Boundaryof LPZ 2(shielded room)

Boundaryof LPZ 1(LPS)

Antenna

Electricalpower line

Water pipe

Gas pipe

Telecomsline

Mast orrailing

LPZ 2

LPZ 1

Criticalequipment

Equipment

SPD 1/2 - Overvoltage protection

SPD 0/1 - Lightning current protection

Equipment

LPZ 0

Figure 7: Basic LPZ concept – BS EN/IEC 62305-4

Table 1: Standardized test waveforms with peak currents used to testSPDs at each LPZ boundary

SPD location/LPZ boundary

LPZ 0/1 LPZ 1/2 LPZ 2/3

Typical SPDinstallationpoint

Service Entrance(e.g. Main

distribution boardor telecom NTP)

Sub-distributionboard

or telecom PBXframe

TerminalEquipment(e.g. socket

outlet)

Mains TestClass/SPD Type1 I/1 II/2 III/3

Surge testwaveform

10/350 current 8/20 current Combination8/20 current and1.2/50 voltage

Typical peaktest current(per mode)

25kA2 40kA 3kA (with 6kV)

Signal/TelecomTest Category1

D13 C23 C1

Surge testwaveform

10/350 current Combination8/20 current and1.2/50 voltage

Combination8/20 current and1.2/50 voltage

Typical peaktest current(per mode)

2.5kA 2kA (with 4kV) 0.5kA (with 1kV)

1 Tests to BS EN/IEC 61643 series2 Peak current (per mode) for a 3 phase SPD to protect a TNS mains system3 Test category B2 10/700 voltage waveform (also within ITU-T standards)

up to 4kV peak also permissible

Types of SPDBS EN/IEC 62305 deals with the provision of SPDs toprotect against both the effects of indirect lightningstrikes and high-energy direct lightning strikes.

● Direct lightning strikes are protected by lightningcurrent or equipotential bonding SPDs (Mains Type1/I SPDs & Signal/Telecom SPDs to Test Category D)

● Indirect lightning strikes and switching transientsare protected by transient overvoltage SPDs(Mains Type 2/II and Type 3/III SPDs and Signal/Telecom SPDs to Test Category C)

Lightning current or equipotential bonding SPDs

Designed to prevent dangerous sparking caused byflashover. Flashover is caused when the extremely highvoltages associated with a direct lightning strikebreaks down cable insulation. This can occur betweenthe structural LPS and electrical services and presents apotential fire hazard and risk from electric shock.

Transient overvoltage SPDs

Designed to protect electrical/electronic equipmentfrom the secondary effects of indirect lightning andagainst switching transients. SPDs should be installedat sub-distribution boards and at equipment level forcritical equipment.

IMPORTANT

The primary purpose of lightning current or equipotential bonding SPDs is to prevent dangerous sparking causedby flashover to protect against the loss of human life. In order to protect electronic equipment and ensure thecontinual operation of systems, transient overvoltage SPDs are required. BS EN/IEC 62305-4 specifically states that“a lightning protection system which only employs equipotential bonding SPDs provides no effective protectionagainst failure of sensitive electrical or electronic systems.”

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CompatibilityThe protector must not interfere with the system’snormal operation:

● mains power supply SPDs should not disrupt thenormal power supply such as creating followcurrent that could blow supply fuses, or causehigh leakage currents to earth

● SPDs for data communication, signal andtelephone lines should not impair or restrict thesystems’ data or signal transmission.

SurvivalIt is vital that the protector is capable of surviving theworst case transients expected at its installationpoint/LPZ boundary. More importantly, since lightning

is a multiple event, the protector must be able towithstand repeated transients.

The highest surge currents occur at the serviceentrance (boundary LPZ 0A to LPZ 1). For buildingswith a structural LPS, the lightning current SPD couldbe subject to as high as 25kA 10/350μs surge currentsper mode on a 3-phase TNS mains system (up to 2.5kA10/350μs per mode on a signal or telecom line) for aworst-case lightning strike of 200,000A.

However, this 200kA level of lightning current itself isextremely rare (approx. 1% probability of occurring)and the peak current the SPD would be subject tofurther assumes that a structure is only fed with onemetallic service. Almost all structures have severalmetallic services connected to them such as gas, water,

BS EN/IEC 62305 refers to the correct application oflightning current and transient overvoltage SPDs as acoordinated set where the service entrance lightningcurrent SPD handles the majority of surge energy andprevents flashover whilst the downstream transientovervoltage SPDs ensure equipment protection bysufficiently limiting the overvoltages. For furtherinformation, please refer to “A Guide toBS EN 62305:2006 protection against lightning”available from Furse.

BS EN/IEC 62305-2 Risk management is used toevaluate the required level of lightning protectionmeasures necessary to lower the risk of damage to aparticular structure, its contents and occupants to adefined tolerable level. If the risk evaluation demandsthat a structural LPS is required, then lightning currentor equipotential bonding SPDs are always required forany metallic electrical services entering the structure.These SPDs are necessary to divert the partial lightningcurrents safely to earth and limit the transientovervoltage to prevent possible flashover. They are

Table 2 summarises potential sources of system impairment.

Table 2: General indication of system impairments which manufacturers of transient overvoltage protectors should provide details of

Protectors for mains supplies Protectors for data lines

Parallel protectorsIn-line

protectorsLow frequency

protectorsNetwork

protectorsRadio frequency

protectors

Nominal operating voltage ✓ ✓ ✓ ✓ ✓

Maximum operating voltage ✓ ✓ ✓ ✓ ✓

Leakage current ✓ ✓ ✓ ✓ ✓

Nominal current rating ✗ ✓ ✓ ✓ ✓

Max continuous current rating ✗ ✓ ✓ ✓ ✓

In-line impedance ✗ ✓ ✓ ✓ ✓

Shunt capacitance ✗ ✗ ✗ ✓ ✓

Bandwidth ✗ ✗ ✓ ✓ ✓

Voltage standing wave ratio ✗ ✗ ✗ ✓ ✓

therefore an integral part of the structural LPS andtypically form the first part of a coordinated SPD setfor effective protection of electronic equipment.

If the risk evaluation shows that a structural LPS isnot required but there is an indirect risk, anyelectrical services feeding the structure via anoverhead line will require lightning current SPDstypically installed at the service entrance, withcoordinated transient overvoltage SPDs downstreamto protect electronic equipment.

In order to provide effective protection, a transientovervoltage protector/SPD must:

● be compatible with the system it is protecting

● survive repeated transients

● have a low `let-through’ voltage, for allcombinations of conductors (enhanced SPDs toBS EN 62305)

● not leave the user unprotected, at the end of itslife, and

● be properly installed

mains, data & telecoms. Each service shares a portionof the lightning current when the protected buildingreceives a strike, greatly reducing the overall currentseen by any single service, and as such any SPD fittedto the electric service lines.

Transient overvoltages caused by the secondary effectsof lightning are considerably more common (lightningflash near a connected service up to 1km away fromthe structure) and therefore are unlikely to havecurrents exceeding 10kA 8/20μs.

Let-through voltageThe larger the transient overvoltage, the greater therisk of flashover, equipment interference, physicaldamage and hence system downtime. Therefore, thetransient overvoltage let through the protector (alsoknown as the protection level Up of the SPD) shouldbe as low as possible and certainly lower than thelevel at which flashover, interference or componentdegradation may occur.

Transient overvoltages can exist between any pair ofconductors:

● phase to neutral, phase to earth and neutral toearth on mains power supplies

● line to line and line(s) to earth on datacommunication, signal and telephone lines

Thus, a good protector (enhanced SPDs toBS EN 62305) must have a low let-through voltagebetween every pair of conductors.

Enhanced performance SPDs - SPD*

BS EN 62305-2 details the application of improvedperformance SPDs to further lower the risk fromdamage. The lower the sparkover voltage, the lowerthe chance of flashover causing insulation breakdown,electric shock and fire.

SPDs that offer lower voltage protection levels furtherreduce the risks of injury to living beings, physicaldamage as well as failure and malfunction of internalsystems. All Furse ESP protectors offer such superiorprotection and are termed as enhanced performanceSPDs (SPD*) in line with BS EN 62305.

Enhanced SPDs can also satisfy more than one testclass/category by handling both high-energy partiallightning currents of 10/350μs waveshape whilstoffering very low let-through voltages. Such enhancedSPDs may be suitable for changing a lightningprotection zone from LPZ 0A right through to LPZ 3 ata single boundary or installation point. As such theyprovide both technical and economic advantages overstandard SPDs.

End of lifeWhen an SPD comes to the end of its working life itshould not leave equipment unprotected. Thus in-lineprotectors should take the line out of commission,preventing subsequent transients from damaging

equipment. SPDs for data communication, signal andtelephone lines and protectors for low current mainspower supplies are usually in-line devices.

Where SPDs are installed at mains power distributionboards it is usually unacceptable for these to suddenlyfail, cutting the power supply. Consequently, toprevent equipment being left unprotected, the SPDshould have a clear pre end-of-life warning, whichallows plenty of time for it to be replaced.

InstallationThe performance of SPDs is heavily dependent upontheir correct installation. Thus, it is vital that SPDs aresupplied with clear installation instructions. Thefollowing is intended to supplement the detailedguidance given with each product in order to give ageneral overview of installation. This should not beviewed as a substitute for the Installation Instructionssupplied with the SPD. Copies of these are availableseparately on request.

Installing parallel connected SPDs for mains powersupplies:● SPDs should be installed very close to the power

supply to be protected, either within thedistribution panel or directly alongside of it (in anenclosure to the required IP rating)

● Connections between the SPD and phase(s), neutraland earth of the supply should be kept very short(ideally 25cm or less, but no more than 50cm)

● SPD performance is further enhanced by tightlybinding connecting leads together (simply usingcable ties or similar), over their entire length

● For safety and convenient means of isolation, thephase/live connecting leads should be suitablyfused using HRC fuses or switchfuse, MCB or MCCB

Installing in-line SPDs for data, signal, telephoneor power:● SPDs are usually installed between where cabling

enters or leaves buildings and the equipment beingprotected (or actually within its control panel)

● The installation position should be close to thesystem’s earth star point (usually the mains powerearth) to enable a short and direct connection toearth

● In-line, or series, connected SPDs generally haveconnections marked line and clean. The line end ofthe SPD should be connected to the incoming or“dirty” line (from where the transient is expected).The clean end of the SPD should be connected tothe line or cable feeding the equipment

● Cables connected to the SPD’s clean end shouldnever be routed next to dirty line cables or theSPD’s earth bond

● Unless ready boxed, SPDs should be installedwithin an existing cabinet/cubicle or in anenclosure to the required IP rating16

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How to get effective protection

Electronic Systems Protection | How to get effective protection

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When and where to protect

When and where to protect | Electronic Systems Protection

How to apply protectionTransient overvoltages are conducted into the sensitivecircuitry of electronic equipment on power and datacommunication, signal and telephone lines. Protectionis recommended for:

● all cables which enter or leave the building(except fibre optic)

● the power supply local to important equipment

● electronic equipment outside the main building(s)

Protect incoming and outgoingelectrical servicesLightning strikes between clouds or to ground (andobjects upon it) can cause transient overvoltages to becoupled onto electrical cables, and hence into thesensitive electronic equipment connected to them. Toprotect the electronic equipment inside a building, allcables that enter or leave the building must beprotected. Cables leaving the building can also providea route back into the building for transients.

For each building protect incoming/outgoing:

● mains power supplies (including UPS supplies)

● data communication and local area network cables

● signal, control, instrumentation and alarm lines

● CCTV, satellite, TV and antenna cables

● telephone and telemetry lines

Protect the power supply locally toimportant equipmentIn addition to installing protection on the mainspower supply as it enters/leaves the building,protection should also be installed locally to importantequipment. Protection at the main LV (low voltage)incomer(s) is necessary to prevent large transientsfrom entering the building’s power distributionsystem, where they could have farreaching effects.However, where the cable run to equipment exceedsapproximately 20 metres, transient overvoltages mayappear on the mains after the protector at the mainLV incomer.

These transients can result from:

● the electrical switching of large inductive loadswithin the building

● a lightning strike to the building – as lightningcurrents flow through down conductors transientovervoltages can be induced on to nearby powercables

● the natural inductance and capacitance of longcable runs, `amplifying’ the voltage `let-through’the protector at the main LV incomer

Additionally, local protection guards against thepossibility of a supply which enters/leaves the buildingbeing overlooked and left unprotected.

Protect data lines locallyGenerally, the biggest risk to data, signal, telecom andnetwork wiring is associated with cables that enterand leave the building. These should always beprotected. However, data cables within a building canadditionally have transients induced on to them whenloops between data and power cables “pick up”voltages from the magnetic field caused by a lightningstrike.

As part of the overall LEMP Protection MeasuresSystem (LPMS), BS EN/IEC 62305 advocates the use ofmetal in the structure, and a Faraday cage lightningprotection scheme to help exclude magnetic fields.Cable management practices eliminate loops byrouteing data and power cables along the samegeneral path.

In these cases, the need for local data line protectionis minimal. However, where these steps are notpossible, data line protection, local to the equipmentrequiring protection, should be considered.

Protect electronic equipment outsidethe buildingOnsite or field-based electronic equipment with mainspower, data communication, video, signal ortelephone line inputs will need to be protectedagainst transient overvoltages. It may be helpful tothink of each equipment cabinet or cubicle as aseparate building with incoming/outgoing cables to beprotected.

Complementary techniquesAs well as the use of transient overvoltage protectors,BS EN/IEC 62305-4 outlines additional protectiontechniques, which can be used to help reduce thetransient threat as part of the overall LPMS. These aredescribed further in the Furse document “A Guide toBS EN 62305:2006 Protection Against Lightning.”Where these can be used, principally on new build orrefurbishment projects, they need to be supported bythe use of SPDs.

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Simplified product selection

Electronic Systems Protection | Simplified product selection

Simplified product selectionAll Furse ESP products are designed to provide simple system integrationwhilst achieving highest levels of effective protection against transients.

Tested in line with the BS EN/IEC 61643 standards series, ESP protection canbe selected and applied to BS EN/IEC 62305 easily using the new SPDproduct application tables and data sheets. Key product and applicationfeatures are represented using the following symbols:

Lightning Protection Zone (LPZ) details theboundary (to BS EN/IEC 62305-4) or installationpoint of the SPD. For example, LPZ 0A 3 signifiesthat the SPD can be installed at the service entranceboundary and create an immediate LPZ 3 suitablefor protecting electronic equipment close to the SPDinstallation. Equipment further downstream of thislocation may require additional protection, againstswitching transients for example.

Mains Test Type defines the Type of mains SPD(BS EN 61643 Type 1, 2, 3 or I, II, III to IEC 61643)tested with the respective test Class I (highenergy 10/350μs current waveform), II (8/20μscurrent waveform) or III (combined 8/20μs currentand 1.2/50μs voltage waveform) from theBS EN/IEC 61643 series. Where more than one Typeis stated (for combined, enhanced Type SPDs), theSPD has been tested to each respective test Class,with the results detailed on its transientperformance specification.

Signal/Telecom Test Category indicates the TestCategories (as defined in BS EN/IEC 61643 series)that SPDs for signal and telecom systems have beensubject to, with the results detailed on the transientperformance specification. Test Category D is ahigh-energy test typically using the 10/350μscurrent waveform. Test Category C is a fast rate ofrise test using the 1.2/50μs voltage waveformcombined with 8/20μs current waveform. TestCategory B is a slow rate of rise test using the10/700μs waveform, also used within ITU standards.Enhanced SPDs tested with categories D, C and Bcan offer up to LPZ 0A 3 protection.

Common Mode signifies that the SPD specificallyoffers protection on conductors with respect toearth. For a mains system, this would be betweenphases and earth or neutral and earth. For adata/telecom line this would be between signalline(s) to earth. Common mode surges can result inflashover if the insulation withstand voltage ofconnected wiring or equipment is exceeded.Flashover could lead to dangerous sparkingpotentially causing fire or electric shock risks.Equipotentially bonding Type 1 mains SPDs or TestCat D tested signal/telecom SPDs reduce the risk offlashover by limiting common mode surges.

Full Mode means that the SPD protects in allpossible modes; common mode (live conductorswith respect to earth) and differential mode(between live conductors). For example, full modemains SPDs offer protection between phase(s) toearth, phases(s) to neutral and neutral to earth.Whilst common mode protection ensures flashoveris prevented, differential mode protection is criticalto ensure sensitive electronics are protected as wellas operational during surge activity.

←

←LPZ0A→3

MAINSTESTTYPE

1 + 2 + 3

SIGNAL/TELECOM

TEST CATD + C + B

COMMON

MODEEquipotential

Bonding

FULL MODEBonding +EquipmentProtection

eENHANCED

Low let-through voltage

3-WAY + N-EFAULT

STATUSINDICATION

REMOTEINDICATIONLED DISPLAY

ACTIVE VOLT-FREECONTACT

Enhanced SPDs (SPD* within BS EN 62305 series)have lower (better) let-through voltage orprotection levels (Up) and therefore further reducethe risk of injury to living beings, physical damageand failure of internal electronic systems. EnhancedType 1 mains SPDs (for a 230V/400V system) shouldhave a protection level Up of no more than 1600Vwhilst Type 2 and Type 3 mains SPDs should have aprotection level Up of no more than 600V in allmodes when tested in accordance withBS EN/IEC 61643 series. Enhanced signal/telecomSPDs should typically have a protection level Up nomore than twice the peak operating voltage of theprotected system.

Status Indication for mains wire-in powerdistribution SPDs is essential as they are installed inparallel or shunt with the supply and as such couldpotentially leave the system unprotected should theSPD fail. 3-way status indication of the SPDs’condition provides simple and clear visualinspection and further provides advanced pre-failure warning such that the system is neverunprotected. Furthermore warning of potentiallyfatal neutral to earth faults due to incorrectearthing and wiring faults for example is providedwith additional flashing indication.

Remote Indication is an innovative feature thatfurther optimizes mains wire-in SPD protection. Aparallel or shunt installed SPD has additive let-through voltage because of its connecting leadsthat need to be kept as short as possible – ideallyno more than 25cm. Often an SPD cannot bemounted in its optimum position withoutcompromising the visibility of its status indication.Innovative remote status indication displaysovercome this by allowing the SPD to be mountedwith short connecting leads with the separatestatus display being conveniently mounted in avisible position such as the front of a powerdistribution cabinet providing convenient andeffective equipment protection.

Active Volt-free Contact is an essential addition tothe visual 3-way status indication. The changeovervolt-free contact is simply connected or linked to anexisting building management system, buzzer orlight and should the SPD have a pre-failurecondition, this would be remotely indicated –particularly important for remote installationswhere the building management system would beconnected to a telecom modem. Active contactsfurther enable the SPD to also conveniently warn ofphase loss from a power failure or blown fuse.

High Bandwidth SPDs ensure the full systemfrequency range of transmission signals, forprotected data communication, signal andtelephone lines, is not impaired. Signal frequenciesoutside the stated SPD bandwidth may potentiallybe distorted causing information loss or corruption.As the SPD should accommodate the characteristicsof the protected system, the stated SPD bandwidth(typically quoted for a 50Ω system) should alwaysexceed the protected system’s bandwidth.

BX IP is an International Protection (IP) rating (toBS EN/IEC 60529) for ready-boxed (BX) SPDstypically used in dusty and damp environments. TheIP rating system (also interpreted as “IngressProtection”) classifies the degrees of protectionprovided against the intrusion of solid objects(including body parts like hands and fingers), dust,accidental contact and water in electricalenclosures. For example, an IP66 rated enclosureprovides no ingress of dust and therefore completeprotection against contact as well as against waterprojected in powerful jets against the enclosurefrom any direction with no harmful effects.Unboxed SPDs should be installed withindistribution panels/cabinets or within externalenclosures to the required IP rating (such as theFurse weatherproof WBX enclosure range).

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www.furse.com Simplified product selection | Electronic Systems Protection

CURRENT

4ARATING

LOW INLINE

1ΩRESISTANCE

HIGHBANDWIDTH

BXIP66

Intelligent Display iD is a new innovation fromFurse that encompasses existing features of 3-waySPD status indication with Neutral to Earth voltagewarning but through clear easy to read text on anilluminated LCD display. Often SPDs should bemounted on their side in order to facilitate shortconnecting leads for better protection levels but asthis compromises the position and appearance ofthe status indication, it is not widely practiced. Alsoavailable in a remote display option, the iD featureenhances mains wire-in SPD installation as thestatus indication text can easily be rotated (in 90°steps, in either direction) at the push of a button toaid good installation practice.

Current Rating indicates the maximum continuouscurrent rating of in-line SPDs for data communication,signal and telephone lines. The SPD’s quotedmaximum continuous current rating should alwaysexceed the peak running current of the protectedsystem to ensure normal system operation is notimpaired. Damage, through overheating, wouldresult if its quoted current rating were exceeded.

Low Inline Resistance states the resistance value inOhms (Ω) per line of SPDs for data communication,signal and telephone lines. A low in-line resistanceis desirable; particularly for systems with highrunning currents in order to reduce any voltagedrops across the SPD and ensure normal systemoperation is not impaired. Consideration should bemade for additional SPDs installed on the same lineto protect connected equipment at each end of theline (e.g. CCTV camera and connected monitoringequipment) as the in-line resistance of each SPD isintroduced into the system.

Common terminology and definitions

The following common terminologies, as recognized byBS EN/IEC 61643, are used throughout SPD specifications inorder to aid correct selection and are defined as follows:

Nominal Voltage Uo is the phase to neutral AC RMS voltageof the mains system (derived from the nominal systemvoltage) for which the SPD is designed. Uo is the voltage bywhich the power system is designated – e.g. 230V.

Maximum Continuous Operating Voltage Uc is the maximumRMS voltage that may be continuously applied to the SPD’smode of protection e.g. phase to neutral mode. This isequivalent to the SPD’s rated peak voltage.

Temporary Overvoltage UT is the stated test value of momentaryvoltage increase or overvoltage that the power SPD mustwithstand safely for a defined time. Temporary overvoltages,typically lasting up to several seconds, usually originate fromswitching operations or wiring faults (for example, sudden loadrejection, single-phase faults) as well as mains abnormalities suchas ferro-resonance effects and harmonics.

Impulse Current Iimp is defined by three parameters, a currentpeak with a charge and a specific energy typically simulatedwith the 10/350μs waveform to represent partial lightningcurrents. This waveform is used, with peak Iimp current valuestated, for the mains Type 1/I SPD Class I test and typically fordata/telecom SPD Test Category D.

Nominal Discharge Current In is a defined nominal peakcurrent value through the SPD, with an 8/20μs currentwaveshape. This is used for classification of mains SPDs (ClassII test) and also for preconditioning of SPDs in Class I andClass II tests.

Maximum Discharge Current Imax is the peak current valuethrough the SPD, with an 8/20μs waveshape. Imax is declaredfor mains Type 2 SPDs in accordance to the test sequence ofthe Class II operating duty test. In general, Imax is greaterthan In.

Combined Impulse Test with Open Circuit Voltage Uoc is ahybrid 1.2/50μs voltage test combined with an 8/20μs current.The test is performed using a combination wave generatorwhere its open circuit voltage is defined as Uoc, typically 6kV1.2/50μs for the mains Class III test and up to 4kV 1.2/50μs forsignal/telecom Test Category C. With an impedance of 2 Ω,the generator also produces a peak short circuit current(sometimes referred to as Isc) at half the value of Uoc (3kA8/20μs for the mains Class III test and up to 2kA 8/20μs forsignal/telecom Test Category C). With both voltage andcurrent test waveforms, the combined impulse test isdesigned to stress all technologies used within SPDs.

Voltage Protection Level Up is the key parameter thatcharacterizes the performance of the SPD in limiting thetransient overvoltage across its terminals. A low protectionlevel value (also known as let-through voltage) is thereforeparticularly critical for the effective protection and continuedoperation of electronic equipment. The peak voltageprotection level Up is declared when the SPD is tested with itsstated nominal discharge current In (or the peak current(Ipeak) of Iimp) and is also declared when the SPD is subject tocombined impulse test (mains Class III test for Type 3 SPDs) aswell as data/telecom Test Categories C and B.

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Protect incoming and outgoingelectrical servicesWe’ll start by considering the main (office) building inisolation.

Incoming mains power suppliesInstall protection on the incoming mainspower supply at the incoming distributionboard(s).

If, as in this example, there are any otherpower supplies entering the buildinginstall protection on these near where theyenter the building.

Outgoing mains power suppliesOutgoing supplies can provide transient overvoltages with aroute back into the building’s power distribution system.

Install protection on supplies to otherbuildings. (Note how, if correctlypositioned, the protector at the incomingdistribution board (1), also protects againsttransients from the outgoing supply to theUPS building.)

Install protection on outgoing supplies tosite services, such as CCTV systems and sitelighting.

Protect all incoming/outgoing data communication, signaland telephone lines (unless fibre optic).

Telephone linesIncoming telephone lines and extensionsthat leave the building have protectorsinstalled on them at the PBX’s distributionframe.

In our example, there is a direct (i.e. notvia the PBX) telephone line to an alarmpanel, which also needs protecting.

Signal and data communication linesProtectors are installed on CCTV videocables from outdoor cameras to preventdamage to the control desk.

A protector is installed at the network hubto protect it from transients on thebetween building data link.

Equipment such as our RF receiver, withantenna (or satellite) links will also needprotecting.

How to apply protection and what to use

Electronic Systems Protection | How to apply protection and what to use

We’ve described how protection should be installed on all cables which enter or leave the building (except fibre optic); the powersupply local to important equipment; electronic equipment outside the main building(s).

With the aid of the illustration we can see how this might be applied in practice.

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Protect the power supply locally toimportant equipmentWithin the building transient overvoltages can be injected onto the mains power supply (downstream of the protector atthe incomer). Consequently, protectors should be installedclose to important pieces of equipment.

Protection is installed on the localdistribution board feeding the serversand network hub. (Note how the topfloor PC network and RF receiver isprotected by the protector on thedistribution board (2).)

The telephone PBX is protected locally by aplug-in protector.

Protect electronic equipment outsidethe buildingElectronic equipment outside the main building in ancillarybuildings, on site or in the field should also be protected.

Protect outdoor CCTV cameras withprotectors on the power supply, andvideo cable (and, if relevant, telemetrycontrol line).

If the UPS is housed in a separate buildingwith a separate earth, incoming andoutgoing supplies will need to beprotected. This is because most modernUPS systems contain electronics that makesthem vulnerable to being disabled bytransient overvoltages. To prevent

transient overvoltage damage to the UPS it must have aprotector installed on its input and (because its outgoingsupply leaves the building) on its output. A protector will alsoneed to be installed on the power supply into the mainbuilding (2).

Protection is also installed on mains power,data communication and telephone linesentering the neighbouring building.Additional protection (not shown) may berequired within this building (whether it’sa computer-controlled warehouse orautomated manufacturing operation withPLCs, drives and computer controls).

Protector selector(1) Mains wire-in protectors p24–35(2) Mains wire-in protectors p28–29, 32–33(3) Mains wire-in protectors p24–35(4) Mains wire-in protectors p24–35(5) PBX telephone/ISDN line protection p62–63(6) Plug-in telephone line protection, or p60–61

Wire-in telephone line protection p44–45, 50–51(7) CCTV video protectors p76–77(8) Computer network protector p64–65(9) RF signal protector p72–75(10) Mains wire-in protector p28–29, 32–33(11) Plug-in mains protector p40–41(12) Protectors for

low current mains power supplies, p38–39CCTV video and p76–77telemetry lines p44–49

(13) Mains wire-in protectors p24–35(14) Mains wire-in protectors p24–35

Computer network protector p64–65PBX telephone/ISDN line protection p62–63

Mains power

RF

Computer network

Telephone line(s)

Signal line

CCTV video

How to apply protection and what to use | Electronic Systems Protection

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Mains product selection

Electronic Systems Protection | Mains product selection

Structure configuration – TypicalInstallation Locations

Service entrance – after meterMain Distribution Board (MDB)

Sub Distribution Board (SDB) –located >10m from MDB

Critical terminal equipment –located >10m from SDB

No external lightning protectionsystem LPS fitted3 Phase 415V TNS or TNCSmains supply– underground supply feed

New ESP 415 D1 or ESP 415 M1for 3 phase 415V supplies

See pages 28 & 32


See page 28 & 32

New ESP 240 D1 or ESP 240 M1for single phase 240V supplies

See page 28 & 32

ESP MC(e.g. Hospital/Laboratory/

Server Equipment)See page 40

New ESP MC/TN/RJ11-/6(e.g. fax machines/modems)

See page 40

New ESP MC/Cat-5e(e.g. computer network hubs)

See page 40

No external lightning protection system LPS fitted3 Phase 415V TNS or TNCS mains supply– exposed overhead supply feed

ESP 415/III/TNS

ESP 415 M2where electronics are located

near MDB before SDBSee pages 26 & 30

External lightning protectionsystem LPS fittedMulitple connected metallicservices(gas/water/data/telecom)3 Phase 415V TNSor TNCSmainssupply


See pages 28 & 32

External lightning protection system LPS fittedMetallic gas/water/data/telecom services – unknown3 Phase 415V TNS or TNCS mains supply

ESP 415/I/TNS forLPS to LPL level I and II

ESP 415/III/TNS forLPS to LPL level III and IV

See page 154

ESP 415 M4 for LPS level I and IIwhere electronics are located near

MDB before SDB

ESP 415 M2 for LPS level III andIV where electronics are located

near MDB before SDBSee page 26 & 30

Mains protectors for specific systems

Fire/intruder alarm panels and CCTV systems Photovoltaic (solar) panels

ESP 240-5A (or -16A) seriesSee page 38

ESP DC seriesSee page 36

Ground Level

Power

Ground Level

LPS

PowerDataTelecomWaterGas

Ground Level

Power

Ground Level

LPS

Power

Unknown

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ESP240/XXX Series 24 – 25Combined Type 1 and 2 protection for single phase mains power supplies and power distribution systems

ESP415/XXX Series 26 – 27Combined Type 1 and 2 protection for three phase mains power supplies and power distribution systems

ESP D1 Series 28 – 29Protection for single and three phase mains power supplies and power distribution systems

ESP M2/M4 Series 30 – 31Protectors with an extra high maximum surge current capacity for three phase mains power supplies

ESP M1 Series 32 – 33Protection for single and three phase mains power supplies and power distribution systems

ESP M1R, M2R, M4R Series 34 – 35Three phase mains power protector with remote status display panel

ESP DC Series 36 – 37Advanced protector for DC supplies and DC power distribution systems

ESP 5A/BX and 16A/BX Series 38 – 39Protectors for mains supplies and fused connections of up to 16 amps. Each also available ready boxed to IP66

ESP MC Series 40 – 41A high performance plug-in mains protector suitable for use on British style (three square pin) plugs and sockets

NEW

NEW

IMPROVED

NEW

NEW

NEW

NEW

Protectors for mains power supplies

Protectors for mains power supplies | Electronic Systems Protection

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ESP 240/XXX Series

Electronic Systems Protection | Mains supplies and power distribution systems

Combined Type 1 and 2 tested protector (to BS EN/IEC 61643) foruse on the main distribution board, particularly where a structuralLightning Protection System (LPS) is employed, for equipotentialbonding. For use at boundaries up to LPZ 0A to protect againstflashover (typically the main distribution board location) throughto LPZ 2 to protect electrical equipment from damage.

Features and benefits✔ Enhanced protection (to BS EN 62305) offering low let-through voltage

further minimizing the risk of flashover creating dangerous sparking orelectric shock

✔ Repeated protection in lightning intense environments

✔ The varistor based design eliminates the high follow current (If)associated with spark gap based surge protection

✔ Compact, space saving design

✔ Indicator shows when the protector requires replacement

✔ Remote signal contact can indicate the protectors’ status throughinterfacing with a building management system

Application✔ Use on single phase mains supplies and power distribution systems for

protection against partial direct or indirect lightning strikes

✔ ESP 240/I/XXX versions for use with Class I or II Lightning ProtectionSystems (LPS)

✔ ESP 240/III/XXX versions for use with Class III or IV LPS; or exposedoverhead single phase power lines where no LPS is fitted

✔ ESP 240/X/TNS versions also cover TNC-S earthing systems

InstallationProtector to be installed in the main distribution panel with connectingleads of minimal length. The protector should be fused and is suitable forattachment to a 35mm top hat DIN rail.

COMMON

MODEEquipotential

Bonding

LPZ0A→2

eENHANCED


MAINSTESTTYPE1 + 2

STATUSINDICATION +

VOLT-FREECONTACT

InstallationThe diagrams below illustrate howto wire the appropriate ESPprotector according to yourchosen electrical system

AccessoriesWeatherproof enclosure

WBX D4

TNC earthing system

TNS earthing system

TT earthing system

IMPORTANTThe primary purpose of Lightning current or Equipotential bonding mains Type 1 SurgeProtective Devices (SPDs) is to prevent dangerous sparking caused by flashover to protectagainst the loss of human life. In order to protect electronic equipment and ensure thecontinual operation of systems, transient overvoltage mains Type 2 and 3 SPDs such as theESP 240 M1 are further required, typically installed at downstream sub-distribution boardsfeeding sensitive equipment. BS EN/IEC 62305 refers to the correct application of mainsType 1, 2 and 3 SPDs as a coordinated set.For further information, please refer to “A Guide to BS EN 62305:2006 Protection AgainstLightning” available from Furse.

25

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ESP 240/XXX Series

Mains supplies and power distribution systems | Electronic Systems Protection

Electrical specification ESP 240/I/TNS ESP 240/III/TNS ESP 240/I/TNC ESP 240/III/TNC ESP 240/I/TT ESP 240/III/TT

Nominal voltage - Phase - Neutral Uo (RMS) 240V

Maximum voltage - Phase-Neutral Uc(RMS/DC)

320V/420V

Temporary Overvoltage TOV UT1 335V

Short circuit withstand capability 25kA/50Hz

Back-up fuse (see installation instructions) 250A

Leakage current (to earth) <2.5mA <2.5mA <2.5mA <2.5mA – –

Volt free contact– current rating– nominal voltage (RMS)

0.5A250V

1 Temporary Overvoltage rating is for a maximum duration of 5 seconds tested to BS EN/IEC 61643

Transient specification ESP 240/I/TNS ESP 240/III/TNS ESP 240/I/TNC ESP 240/III/TNC ESP 240/I/TT ESP 240/III/TTType 1 (BS EN), Class I (IEC)

Nominal discharge current 8/20μs (per mode) In 50kA 25kA 50kA 25kA 50kA/100kA (N-E) 25kA/50kA (N-E)

Let-through voltage Up at In1 <1.5kV <1.3kV <1.5kV <1.3kV <1.5kV <1.3kV

Impulse discharge current 10/350μs Iimp(per mode)2 50kA 25kA 50kA 25kA 50kA/100kA (N-E) 25kA/50kA (N-E)

Let-through voltage Up at Iimp1 <1.2kV <1.2kV <1.2kV <1.2kV <1.2kV <1.2kV

Let-through voltage Up at 1.2/50μs(N-E, TT system)

– – – – <1.2kV <1.2kV

Type 2 (BS EN), Class II (IEC)



Maximum discharge current Imax (per mode)2 100kA 100kA 100kA 100kA 100kA/160kA(N-E)

100kA/100kA(N-E)

1 The maximum transient voltage let-through of the protector throughout the test (±5%), phase to earth and neutral to earth.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.

Mechanical specification ESP 240/I/TNS ESP 240/III/TNS ESP 240/I/TNC ESP 240/III/TNC ESP 240/I/TT ESP 240/III/TT

Temperature range –40 to +80°C

Connection type Screw Terminal

Conductor size (stranded) 25mm2

Earth connection Screw Terminal

Volt free contact Connect via screw terminal with conductor up to 1.5mm2 (stranded)

Degree of protection (IEC 60529) IP20

Case material Thermoplastic, UL 94 V-0

Mounting Indoor, 35mm top hat DIN rail

Weight – unit 0.84kg 0.44kg 0.44kg 0.29kg 0.68kg 0.44kg

Weight – packaged 0.94kg 0.54kg 0.54kg 0.39kg 0.78kg 0.54kg

Dimensions to DIN 43880 - HxDxW 1 90mm x 68mm x72mm (4TE)

90mm x 68mm x36mm (2TE)





1 The remote signal contact (removable) adds 10mm to height

NEW NEW NEW NEW NEW NEW

72 mm

90 mm ESP 240/I/TNSESP 240/I/TT

54 mm

90 mm ESP 240/III/TT

36 mm

90 mm

Standard depth 68 mm

ESP 240/III/TNSESP240/I/TNCESP240/III/TNC

26

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ESP 415/XXX Series


InstallationThe diagrams below illustrate howto wire the appropriate ESPprotector according to yourchosen electrical system.

TNC earthing system

TNS earthing system

TT earthing system

Combined Type 1 and 2 tested protector (to BS EN/IEC 61643) foruse on the main distribution board, particularly where a structuralLightning Protection System (LPS) is employed, for equipotentialbonding. For use at boundaries up to LPZ 0A to protect againstflashover (typically the main distribution board location) throughto LPZ 2 to protect electrical equipment from damage.

Features and benefits✔ Enhanced protection (to BS EN 62305) offering low let-through voltage

further minimizing the risk of flashover creating dangerous sparking orelectric shock


✔ The varistor based design eliminates the high follow current (If)associated with spark gap based surge protection

✔ Compact, space saving design

✔ Indicator shows when the protector requires replacement

✔ Remote signal contact can indicate the protectors’ status throughinterfacing with a building management system

Application✔ Use on three phase mains supplies and power distribution systems for

protection against partial direct or indirect lightning strikes

✔ ESP 415/I/XXX versions for use with Class I or II Lightning ProtectionSystems (LPS)

✔ ESP 415/III/XXX versions for use with Class III or IV LPS; or exposedoverhead three phase power lines where no LPS is fitted

✔ ESP 415/X/TNS versions also cover TNC-S earthing systems

InstallationProtector to be installed in the main distribution panel with connectingleads of minimal length. The protector should be fused and is suitable forattachment to a 35mm top hat DIN rail.

COMMON

MODEEquipotential

Bonding

LPZ0A→2

eENHANCED


MAINSTESTTYPE1 + 2

STATUSINDICATION +

VOLT-FREECONTACT

IMPORTANTThe primary purpose of Lightning current or Equipotential bonding mains Type 1 SurgeProtective Devices (SPDs) is to prevent dangerous sparking caused by flashover to protectagainst the loss of human life. In order to protect electronic equipment and ensure thecontinual operation of systems, transient overvoltage mains Type 2 and 3 SPDs such as theESP 240 M1 are further required, typically installed at downstream sub-distribution boardsfeeding sensitive equipment. BS EN/IEC 62305 refers to the correct application of mains Type 1,2 and 3 SPDs as a coordinated set.For further information, please refer to “A Guide to BS EN 62305:2006 Protection AgainstLightning” available from Furse.

AccessoriesWeatherproof enclosures

WBX D4Use with TNS and TNC versions

WBX D8Use with TT versions

27

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ESP 415/XXX Series


Electrical specification ESP 415/I/TNS ESP 415/III/TNS ESP 415/I/TNC ESP 415/III/TNC ESP 415/I/TT ESP 415/III/TT

Nominal voltage - Phase - Neutral Uo (RMS) 240V

Maximum voltage - Phase-Neutral Uc(RMS/DC)

320V/420V

Temporary Overvoltage TOV UT1 335V

Short circuit withstand capability 25kA/50Hz


Leakage current (to earth) <2.5mA <2.5mA <2.5mA <2.5mA – –

Volt free contact– current rating– nominal voltage (RMS)

0.5A250V

1 Temporary Overvoltage rating is for a maximum duration of 5 seconds tested to BS EN/IEC 61643

Transient specification ESP 415/I/TNS ESP 415/III/TNS ESP 415/I/TNC ESP 415/III/TNC ESP 415/I/TT ESP 415/III/TTType 1 (BS EN), Class I (IEC)



Impulse discharge current 10/350μs Iimp(per mode)2 25kA 12.5kA 25kA 12.5kA 25kA/100kA (N-E) 12.5kA/50kA (N-E)

Let-through voltage Up at Iimp1 <1.3kV <1.2kV <1.3kV <1.2kV <1.3kV <1.2kV

Let-through voltage Up at 1.2/50μs(N-E, TT system)

– – – – <1.2kV <1.2kV




Maximum discharge current Imax (per mode)2 100kA 50kA 100kA 50kA 100kA/160kA(N-E)

50kA/100kA(N-E)

1 The maximum transient voltage let-through of the protector throughout the test (±5%), phase to earth and neutral to earth.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.

Mechanical specification ESP 415/I/TNS ESP 415/III/TNS ESP 415/I/TNC ESP 415/III/TNC ESP 415/I/TT ESP 415/III/TT

Temperature range –40 to +80°C

Connection type Screw Terminal


Earth connection Screw Terminal



Case material Thermoplastic, UL 94 V-0

Mounting Indoor, 35mm top hat DIN rail



Dimensions to DIN 43880 - HxDxW 1 90mm x 68mm x72mm (4TE)






1 The remote signal contact (removable) adds 10mm to height


72 mm

90 mm ESP 415/I/TNSESP 415/III/TNS

90 mm

90 mm ESP 415/I/TTESP 415/III/TT

54 mm

90 mm


ESP 415/I/TNCESP 415/III/TNC

28

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ESP D1 Series


InstallationInstall in parallel, within thepower distribution board ordirectly (via fuses) on to thesupply feeding equipment. Can beinstalled in series for low currentsupplies – see installationinstructions.

For three phase ESP XXX D1R/LEDor ESP XXX D1R/LCD units,position remote display, makingsure that the cable is longenough, is unimpeded within thecabinet, and allows a minimum of60mm behind the panel front (forthe interconnection cable).

At distribution boards, theprotector can be installed eitheron the load side of the incomingisolator, or on the closestoutgoing way to the incomingsupply. Connect, with very shortconnecting leads, to phase(s),neutral and earth.


WBX D4Use with single phase protectors

WBX D8Use with three phase protectors

ESP RLA HD-1Spare 1 metre cable assembly forthree phase ESP XXX D1R/LED orESP XXX D1R/LCD

ESP RLA HD-4Spare 4 metre cable assembly forthree phase ESP XXX D1R/LED orESP XXX D1R/LCD

Combined Type 1, 2 and 3 tested protector (to BS EN/IEC 61643) foruse on mains power distribution systems primarily to protectconnected electronic equipment from transient overvoltages on themains supply, e.g. computer, communications or control equipment.Innovative remote display options allow both protector and displayto be mounted in their optimum position. For use at boundaries upto LPZ 0B to protect against flashover (typically the maindistribution board location, with multiple metallic services entering)through to LPZ 3 to protect sensitive electronic equipment.

Features and benefits✔ Very low let-through voltage (enhanced protection to BS EN 62305)

between all sets of conductors (phase to neutral, phase to earth,neutral to earth – Full Mode protection)

✔ Full mode design capable of handling partial lightning currents as wellas allowing continual operation of protected equipment

✔ Repeated protection in lightning intense environments✔ Innovative multiple thermal disconnect technology for safe

disconnection from faulty or abnormal supplies (without compromisingprotective performance)

✔ Three way visual indication of protection status and advanced pre-failure warning so you need never be unprotected

✔ Three phase ESP XXX D1R/LED or ESP XXX D1R/LCD units (where XXX =208, or 415, or 480) have a remote display that allows the protector tobe mounted close to the incoming feed or distribution board with thedisplay being mounted in a visible position e.g. at the front of the panel

✔ Three phase ESP XXX D1/LCD or ESP XXX D1R/LCD units have backlitLCD intelligent display offering clear status information that can berotated should the unit be mounted on its side to facilitate shortconnecting leads for optimal protection

✔ Remote indication facility allows pre-failure warning to be linked to abuilding management system, buzzer or light

✔ Changeover active volt free contact enables the protector to be used towarn of phase loss (i.e. power failure,blown fuses etc)

✔ Flashing warning of potentially fatalneutral to earth supply faults (due toincorrect earthing, wiring errors orunbalanced conditions)

✔ Through terminal facility allows seriesconnection on low current supplies toeliminate high additive voltageassociated with connecting leads onunits installed in parallel

✔ Compact space saving DIN housing

FULL MODEBonding +Equipment Protection

eENHANCED


MAINSTESTTYPE

1 + 2 + 3

ACTIVEVOLT-FREECONTACT

PE

EnhancedMains

ProtectorEN/IEC 61643

PATENTAPPLIED

FOR

L L' L2 L2' L3 L3' N N'

1114 12

STATUS

LPZ0B→3

NEW – COMING SOON

Parallel connection of ESP 415 D1,ESP 208 D1 and ESP 480 D1 series to threephase star (4 wire and earth) supplies

(fuses not shown for clarity)

SINGLE PHASE THREE PHASE SERIES1

Electrical specification ESP 120 D1 ESP 240 D1 ESP 277 D1 ESP 208 D1 ESP 415 D1 ESP 480 D1Series Series Series

Nominal voltage - Phase - Neutral Uo (RMS) 120V 240V 277V 208V 415V 480V

Maximum voltage - Phase-Neutral Uc (RMS) 150V 280V 350V 150V 280V 350V

Temporary Overvoltage TOV UT2 208V 415V 480V 208V 415V 480V

Short circuit withstand capability 25kA, 50Hz

Working voltage (RMS) 90-150V 200-280V 232-350V 156-260V 346-484V 402-600V

Frequency range 47-63Hz


Leakage current (to earth) <250μA

Indicator circuit current <10mA

Volt free contact3

– current rating– nominal voltage (RMS)

Screw terminal1A

250V1 Three phase series (208V, 415V or 480V) include fixed (D1) or remote (D1R) LED or LCD options e.g. ESP 415 D1/LED, ESP 415 D1/LCD, ESP 415 D1R/LED,

ESP 415 D1R/LCD2 Temporary Overvoltage rating is for a maximum duration of 5 seconds tested to BS EN/IEC 616433 Minimum permissable load is 5V DC, 10mA to ensure reliable operation

Transient specification ESP 120 D1 ESP 240 D1 ESP 277 D1 ESP 208 D1 ESP 415 D1 ESP 480 D1Type 1 (BS EN), Class I (IEC) Series Series Series

Nominal discharge current 8/20μs (per mode) In 20kA

Let-through voltage Up at In1 <600V <900V <1kV <600V <900V <1kV

Impulse discharge current 10/350μs Iimp(per mode)2

4kA

Let-through voltage Up at Iimp1 <500V <750V <850V <500V <750V <850V

Impulse discharge current (per phase) limp3 6.25kA



Let-through voltage Up at In1 <600V <900V <1kV <600V <900V <1kV

Maximum discharge current Imax (per mode)2 40kA

Maximum discharge current Imax (per phase) 80kA

Type 3 (BS EN), Class III (IEC)

Let-through voltage at Uoc of 6kV 1.2/50μs andIsc of 3kA 8/20μs (per mode)4

<390V <600V <680V <390V <600V <680V

1 The maximum transient voltage let-through of the protector throughout the test (±5%), phase to neutral, phase to earth and neutral to earth.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.3 Rating is considered as the current capability of the protector for equipotential bonding near the service entrance.4 Combination wave test within BS 6651:1999 App. C, Cats C-Low & B-High, IEEE C62.41-2002 Location Cats C1 & B3, SS CP 33:1996 App. F, AS 1768-1991

App. B, Cat B, UL1449 mains wire-in

Mechanical specification ESP 120 D1 ESP 240 D1 ESP 277 D1 ESP 208 D1 ESP 415 D1 ESP 480 D1Series Series Series

Temperature range –40 to +70ºC

Connection type Screw terminal


Earth connection Screw terminal


Display connection (three phase 208/415/480D1R/LED or D1R/LCD versions)

– HD-D Type 1 metre interconnection cable– 4 metre cable (ESP RLA HD-4) optional


Case material PBT UL-94 V-0

Weight – unit 0.4kg 0.85kg

Weight – packaged 0.5kg 0.95kg

Dimensions to DIN 43880 – HxDxW1 90mm x 68mm x 72mm (4TE) 90mm x 68mm x 144mm (8TE)1 The remote signal contact (removable) adds

10mm to height

29

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ESP D1 Series



NEW – COMING SOON

If you desire a protector with an extrahigh maximum surge current use theESP M2 or M4 series. If your supply isfused at 16 amps, or less, the in-lineprotectors (and their ready boxedderivatives) may be more suitable.


72 mm

90 mm

144 mm

90 mm

30

ESP M2/M4 Series


WBX M2For use with the ESP XXX M2

WBX M4For use with the ESP XXX M4

Live connecting leads should befused accordingly

www.furse.comElectronic Systems Protection | Mains supplies and power distribution systems

ApplicationUse ESP M2 versions on maindistribution panel for buildingswith a Class III or IV structural LPSfitted or exposed 3 phase powerlines where no LPS is fitted. UseESP M4 versions on maindistribution panel for buildingswith a Class I or II LPS fitted.

InstallationInstall in parallel, within the powerdistribution board, either on theload side of the incoming isolator,or on the closest outgoing way tothe incoming supply.

Parallel connection to three phase star(4 wire and earth) supplies


DIRTY CLEAN

Fromsupply

Toload

Connect, with very shortconnecting leads, to phase(s),neutral and earth. Phase/liveconnecting leads should be fusedwith high rupture capacity (HRC)fuses, a switchfuse, MCCB or type‘C’ MCB.


LPZ0A→3

eENHANCED


MAINSTESTTYPE

1 + 2 + 3

3-WAY + N-EFAULT

STATUSINDICATION


Combined Type 1, 2 and 3 tested protector (to BS EN/IEC 61643)for use on the main distribution board directly feedingelectronic equipment such as computers, communication andcontrol equipment, particularly where a structural LightningProtection System (LPS) is employed. For use at boundariesup to LPZ 0A to protect against flashover (typically the maindistribution board location) through to LPZ 3 to protect sensitiveelectronic equipment.


between all sets of conductors (phase to neutral, phase to earth andneutral to earth)

✔ Full mode design capable of handling high energy partiallightning currents as well as allowing continual operation ofprotected equipment

✔ Innovative multiple thermal disconnect technology, for safedisconnection from faulty or abnormal supplies (withoutcompromising protective performance)

✔ Three way visual indication of protection status

✔ Advanced pre-failure warning so you need never be unprotected


✔ Changeover active volt free contact enables the protector to be used towarn of phase loss (i.e. power failure, blown fuses, etc)

✔ Unique flashing warning of potentially fatal neutral to earthsupply faults (caused by incorrect earthing, wiring errors orunbalanced conditions)

✔ Robust steel housing

✔ Protector base provides ultra low inductance earth bond tometal panels

✔ Convenient holes for flat mounting

For main distribution boards with multiple metallic services (gas, water, telecom/data lines)entering and for sub-distribution boards, the ESP M1 Series are more suited. If your supplyis fused at 16 amps, or less, the in-line protection (ESP 240 (or 120-5A (or -16A) and ready-boxed derivatives) may be suitable. If you need to mount the the display panel separatelyfrom the main protector unit, use the ESP XXX M2R or ESP XXX M4R.

Electrical specification ESP 415 M2 ESP 415 M4 ESP 480 M2 ESP 480 M4

Nominal voltage - Phase - Neutral Uo (RMS) 415V 415V 480V 480V

Maximum voltage - Phase-Neutral Uc (RMS) 280V 280V 350V 350V

Temporary Overvoltage TOV UT1 415V 415V 480V 480V


Working voltage (RMS) 346-484V 346-484V 402-600V 402-600V


Back-up fuse (see installation instructions) 200A 315A 200A 315A

Leakage current (to earth) <500μA <1000μA <500μA <1000μA

Indicator circuit current <20mA <40mA <20mA <40mA

Volt free contact2


Screw terminal1A

250V1 Temporary Overvoltage rating is for a maximum duration of 5 seconds tested to BS EN/IEC 616432 Minimum permissable load is 5V DC, 10mA to ensure reliable operation

Transient specification ESP 415 M2 ESP 415 M4 ESP 480 M2 ESP 480 M4Type 1 (BS EN), Class I (IEC)

Nominal discharge current 8/20μs (per mode) In 40kA 80kA 40kA 80kA

Let-through voltage Up at In1 <900V <900V <1kV <1kV


8kA 16kA 8kA 16kA

Let-through voltage Up at Iimp1 <750V <750V <850V <850V

Impulse discharge current (per phase) limp3 12.5kA 25kA 12.5kA 25kA


Nominal discharge current 8/20μs (per mode) In 40kA 80kA 40kA 80kA

Let-through voltage Up at In1 <900V <900V <1kV <1kV

Maximum discharge current Imax (per mode)2 80kA 160kA 80kA 160kA

Maximum discharge current Imax (per phase) 160kA 320kA 160kA 320kA



<590V <570V <670V <650V

1 The maximum transient voltage let-through of the protector throughout the test (±5%), phase to neutral, phase to earth and neutral to earth.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.3 Rating is considered as the current capability of the protector for equipotential bonding near the service entrance.4 Combination wave test within BS 6651:1999 App. C, Cats C-Low & B-High, IEEE C62.41-2002 Location Cats C1 & B3, SS CP 33:1996 App. F, AS 1768-1991 App.B, Cat B, UL1449 mains wire-in

Mechanical specification ESP 415 M2 ESP 415 M4 ESP 480 M2 ESP 480 M4



Conductor size (stranded) 25mm2 50mm2 25mm2 50mm2




Case material Steel

Weight – unit 2.35kg 3.9kg 2.35kg 3.9kg

Weight – packaged 2.5kg 4.2kg 2.5kg 4.2kg

Dimensions

31

ESP M2/M4 Series

www.furse.com Mains supplies and power distribution systems | Electronic Systems Protection

ESPXXX M2

ESPXXX M4

Depth = 78mm Depth = 141mm

M5 clearance

NOTE:The unit takesup 25mm ofthe length ofthe fixing screw.

NEW NEWIMPROVEDIMPROVED

Combined Type 1, 2 and 3 tested protector (to BS EN/IEC 61643) for useon mains power distribution systems primarily to protect connectedelectronic equipment from transient overvoltages on the mains supply,e.g. computer, communications or control equipment. For use atboundaries up to LPZ 0B to protect against flashover (typically themain distribution board location, with multiple metallic servicesentering) through to LPZ 3 to protect sensitive electronic equipment.


between all sets of conductors (phase to neutral, phase to earth,neutral to earth – Full Mode protection)



✔ Innovative multiple thermal disconnect technology for safedisconnection from faulty or abnormal supplies (without compromisingprotective performance)

✔ Three way visual indication of protection status and advancedpre-failure warning so you need never be unprotected


✔ Changeover active volt free contact enables the protector to be used towarn of phase loss (i.e. power failure, blown fuses etc)

✔ Flashing warning of potentially fatal neutral to earth supply faults (dueto incorrect earthing, wiring errors or unbalanced conditions)


✔ Base provides ultra low inductance earth bond to metal panels

✔ Compact size for installation in the power distribution board

✔ ESP 240 M1 has Network Rail Approval PA05/01832.NRS PADS reference 086/047149

InstallationInstall in parallel, within thepower distribution board ordirectly (via fuses) on to thesupply feeding equipment.

At distribution boards, theprotector can be installed eitheron the load side of the incomingisolator, or on the closestoutgoing way to the incomingsupply. Connect, with very shortconnecting leads, to phase(s),neutral and earth.


WBX 3Use with single phase protectors

WBX 4Use with three phase protectors

Parallel connection of ESP 415 M1,ESP 208 M1 or ESP 480 M1 to three phase

star (4 wire and earth) supplies(fuses not shown for clarity)

Parallel connection of single phase protectorsESP 240 M1, ESP 120 M1 or ESP 277 M1


DIRTY CLEAN

Fromsupply

Toload

DIRTY CLEAN

Fromsupply

Toload

ESP 415 M1 installed within a control panel on themains input to protect the panel’s control systems.Note the remote indication connection (top of protector)


ESP M1 Series

www.furse.com

32


LPZ0B→3

eENHANCED


MAINSTESTTYPE

1 + 2 + 3

3-WAY + N-EFAULT

STATUSINDICATION


Depth=73mm

M5 clearance

NOTE:The unit takesup 20mm ofthe length ofthe fixingscrew.

If you desire a protector with an extrahigh maximum surge current use theESP M2 or M4 series. If your supply isfused at 16 amps, or less, the in-lineprotectors (ESP 240 (or 120-5A (or -16A)and their ready boxed derivatives)may be more suitable. If you need tomount the display panel separatelyfrom the main protector unit, use theESP M1R series.


ESP M1 Series

www.furse.com

33

Electrical specification ESP 120 M1 ESP 208 M1 ESP 240 M1 ESP 415 M1 ESP 277 M1 ESP 480 M1










Volt free contact2


Screw terminal1A

250V1 Temporary Overvoltage rating is for a maximum duration of 5 seconds tested to BS EN/IEC 616432 Minimum permissable load is 5V DC, 10mA to ensure reliable operation

Transient specification ESP 120 M1 ESP 208 M1 ESP 240 M1 ESP 415 M1 ESP 277 M1 ESP 480 M1Type 1 (BS EN), Class I (IEC)


Let-through voltage Up at In1 <600V <600V <900V <900V <1kV <1kV


4kA


Impulse discharge current (per phase) limp3 6.25kA



Let-through voltage Up at In1 <600V <600V <900V <900V <1kV <1kV


Maximum discharge current Imax (per phase) 80kA



<390V <390V <600V <600V <680V <680V


Mechanical specification ESP 120 M1 ESP 208 M1 ESP 240 M1 ESP 415 M1 ESP 277 M1 ESP 480 M1







Case material Steel



Dimensions

IMPROVED IMPROVED IMPROVED IMPROVED IMPROVED IMPROVED

DIRTY CLEAN

Fromsupply

Toload

Parallelconnection ofESP 415 M1Rto three phasestar (4 wireand earth)supplies (fusesnot shown forclarity)

Simple plug andsocket connectionbetween theprotector unitand the remotedisplay

34

ESP M1R, M2R, M4R Series

Combined Type 1, 2 and 3 tested protector (to BS EN/IEC 61643) foruse on mains power distribution systems primarily to protectconnected electronic equipment from transient overvoltages on themains supply, e.g. computer, communications or control equipment.Remote display allows both display and protector unit to bemounted in their optimum positions. For use at boundaries up toLPZ 0A to protect against flashover (typically the main distributionboard location, with multiple metallic services entering) through toLPZ 3 to protect sensitive electronic equipment.

Features and benefits✔ The remote display means the protector can be mounted close to the

incoming feed or first way on the distribution board and the display inan easily visible position, e.g. on front of cabinet

✔ Very low let-through voltage (enhanced protection to BS EN 62305)between all sets of conductors (phase to neutral, phase to earth,neutral to earth – Full Mode protection)


✔ Repeated protection in lightning intense environments✔ Innovative multiple thermal disconnect technology for safe

disconnection from abnormal or faulty supplies✔ Remote display gives three way visual indication of protection status

and is easily installed using standard drilling tools✔ Plug-in cable connections between protector and display enable easy

connection (1m cable supplied as standard)✔ Advanced pre-failure warning so you need never be unprotected✔ Remote indication facility allows pre-failure warning to be linked to a

building management system, buzzer or light✔ Changeover active volt free contact enables the protector to be used to

warn of phase loss (i.e. power failure, blown fuses, etc)✔ Unique flashing warning of potentially fatal neutral to earth supply faults

(caused by incorrect earthing, wiring errors or unbalanced conditions)✔ Robust steel housing (protector), and sturdy ABS housing (display)✔ Base provides ultra-low inductance earth bond to metal panels✔ Remote display comes with integral fixings and a panel drilling template

AccessoriesESP RLA-1Spare 1 metre cable assembly

ESP RLA-4Spare 4 metre cable assembly

ESP RDUSpare display unit

Front view of a cabinet with the display unit, easily visible,mounted on the front of the door, whilst the protector unit isinstalled deep within

For three phase applications where aremote display is unnecessary, use therespective ESP M1, M2 or M4 Series.

www.furse.comElectronic Systems Protection | Mains supplies and power distribution systems

ApplicationUse ESP M1R versions on maindistribution panel for buildingswith multiple metallic services(e.g. gas, water, telephone lines)and on sub-distribution boardsfeeding sensitive equipment. UseESP M2R versions on maindistribution panel for buildingswith a Class III or IV structural LPSfitted or exposed 3 phase powerlines where no LPS is fitted. UseESP M4R versions on maindistribution panel for buildingswith a Class I or II LPS fitted.

InstallationInstallation of the protector unit isidentical to the ESP M1, M2 or M4Series.

Position remote display, makingsure that the cable is longenough, is unimpeded within thecabinet, and allows a minimum of60mm behind the panel front (forthe interconnection cable).

MAINSTESTTYPE

1 + 2 + 3



eENHANCED


LPZM1R 0B→3

M2R 0A→3

M4R 0A→3

3-WAY + N-EFAULT

STATUSINDICATION

REMOTEINDICATIONLED DISPLAY

Electrical specification ESP 415 M1R ESP 480 M1R ESP 415 M2R ESP 480 M2R ESP 415 M4R ESP 480 M4R







Back-up fuse (see installation instructions) 125A 125A 200A 200A 315A 315A

Leakage current (to earth) <250μA <250μA <500μA <500μA <1000μA <1000μA

Indicator circuit current <10mA <10mA <20mA <20mA <40mA <40mA

Volt free contact2


Screw terminal1A

250V1 Temporary Overvoltage rating is for a maximum duration of 5 seconds tested to BS EN/IEC 61643.2 Minimum permissable load is 5V DC, 10mA to ensure reliable operation.Under fault conditions, the remote display will go blank if the L1 phase loses power or becomes faulty. This is due to the isolation requirements needed for circuitrymounted externally to the main protector unit.

Transient specification ESP 415 M1R ESP 480 M1R ESP 415 M2R ESP 480 M2R ESP 415 M4R ESP 480 M4RType 1 (BS EN), Class I (IEC)

Nominal discharge current 8/20μs (per mode) In 20kA 20kA 40kA 40kA 80kA 80kA

Let-through voltage Up at In1 <900V <1kV <900V <1kV <900V <1kV


4kA 4kA 8kA 8kA 16kA 16kA


Impulse discharge current (per phase) limp3 6.25kA 6.25kA 12.5kA 12.5kA 25kA 25kA


Nominal discharge current 8/20μs (per mode) In 20kA 20kA 40kA 40kA 80kA 80kA

Let-through voltage Up at In1 <900V <1kV <900V <1kV <900V <1kV

Maximum discharge current Imax (per mode)2 40kA 40kA 80kA 80kA 160kA 160kA

Maximum discharge current Imax (per phase) 80kA 80kA 160kA 160kA 320kA 320kA



<600V <680V <590V <670V <570V <650V


Mechanical specification ESP 415 M1R ESP 480 M1R ESP 415 M2R ESP 480 M2R ESP 415 M4R ESP 480 M4R



Conductor size (stranded) 16mm2 16mm2 25mm2 25mm2 50mm2 50mm2




Display connection 6 way 1 metre interconnection cable - 4 metre cable optional (ESP RLA-4)

Case material Unit – Steel, Display – ABS

Weight – unit 1.1kg 1.1kg 2.45kg 2.45kg 4kg 4kg


Dimensions

35

ESP M1R, M2R, M4R Series

www.furse.com Mains supplies and power distribution systems | Electronic Systems Protection

NEW NEW NEW NEW NEW

ESPXXX M2

ESPXXX M4

Depth = 78mm Depth = 141mm

M5 clearance

NOTE:The unit takesup 25mm ofthe length ofthe fixing screw.

IMPROVED

Protector

Depth=73mm

M5 clearance

NOTE:The unit takes up

20mm of the lengthof the fixing screw

Display unit(rear view)

M3 threaded

Depth=12mm(60mm depth requiredbehind panel for plug)

Combined Type 2 and 3 tested protector (to BS EN/IEC 61643) foruse on DC systems to protect connected electronic equipment fromtransient overvoltages on the mains supply, e.g. control equipment.Available for 12, 24, 36 and 48V DC systems. For use at boundariesLPZ 1 through to LPZ 3 to protect sensitive electronic equipment.

Features and benefits✔ Low let-through voltage (enhanced protection to BS EN 62305)

between all sets of conductors (positive to negative, positive to earthand negative to earth) – Full Mode protection) allowing continuousoperation of equipment


✔ Visual indication of protector status

✔ Advanced pre-failure warning so you need never be unprotected



✔ Simple parallel connection

✔ Base provides ultra low inductance earth bond to metal panels

✔ Compact size for installation in the power distribution board

✔ Maintenance free

For low current applications, the H Series (4A), E Series (1.25A) or D Series (300mA)protectors may be suitable.

ApplicationUse on DC power distributionsystems to protect connectedelectronic equipment fromtransient overvoltages on the DCsupply, e.g. DC fed communicationsor control equipment.

InstallationInstall in parallel, within thepower distribution board ordirectly on the supply feeding theequipment.

At distribution boards, theprotector can be installed eitheron the load side of the incomingisolator, or on the closestoutgoing way to the incomingsupply. Connect, with very shortconnecting leads, to positive,negative and earth.

AccessoriesWBX 3Weatherproof enclosure

Parallel connection of ESP 48 DC

DIRTY CLEAN

Fromsupply

Toload

Electronic Systems Protection | DC supplies and power distribution systems

ESP DC Series

www.furse.com

36

MAINSTESTTYPE2 + 3


LPZ1→3

eENHANCED


STATUSINDICATION +

VOLT-FREECONTACT

Electrical specification ESP 12 DC ESP 24 DC ESP 36 DC ESP 48 DC

Nominal voltage (RMS) 12V 24V 36V 48V

Maximum voltage (RMS) 15V 30V 45V 60V

Working voltage (RMS) 9-15V 18-30V 27-45V 36-60V




Volt free contact1


Screw terminal1A

250V

1 Minimum permissable load is 5V DC, 10mA to ensure reliable operation

Transient specification ESP 12 DC ESP 24 DC ESP 36 DC ESP 48 DCType 2 (BS EN), Class II (IEC)


Let-through voltage Up at In1 <250V <250V <250V <250V




<190V <190V <190V <190V

1 The maximum transient voltage let-through of the protector throughout the test (±5%) per mode.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.3 Combination wave test within BS 6651:1999 App. C, Cats C-Low & B-High, IEEE C62.41-2002 Location Cats C1 & B3, SS CP 33:1996 App. F, AS 1768-1991 App.B, Cat B, UL1449 mains wire-in

Mechanical specification ESP 12 DC ESP 24 DC ESP 36 DC ESP 48 DC







Case material Steel

Weight – unit 0.6kg 0.6kg 0.6kg 0.6kg

Weight – packaged 0.7kg 0.7kg 0.7kg 0.7kg

Dimensions

Depth=73mm

M5 clearance

NOTE:The unit takesup 20mm of thelength of thefixing screw

DC supplies and power distribution systems | Electronic Systems Protection

ESP DC Series

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37

Combined Type 2 and 3 tested protector (to BS EN/IEC 61643) foruse on low current (up to 5 or 16A) single phase systems to protectconnected electronic equipment from transient overvoltages on themains supply, e.g. fire/intruder alarm panels. Protectors with /BXsuffix come ready-boxed, to IP66, for use in dirty or dampenvironments. Available for 90-150 volts, 200-280 volts and 232-350volts supplies. For use at boundaries LPZ 1 through to LPZ 3 toprotect sensitive electronic equipment.


between all sets of conductors (phase to neutral, phase to earth,neutral to earth - Full Mode protection) allowing continuous operationof equipment


✔ Compact size for easy incorporation in the protected system

✔ Removable DIN rail foot for simple clip-on mounting totop hat DIN rails (unboxed versions)

✔ Colour coded terminals give a quick and easy installationcheck – grey for the dirty (line) end and green for theclean end

✔ Available ready-boxed to IP66 for use in dirty or dampenvironments (protectors with /BX suffix)

✔ Robust housing and substantial earth stud

✔ Fixing holes ready for flat mounting


✔ ESP 240-5A/BX has Network Rail Approval PA05/02896. NRS PADSreference 087/037285

If your supply is fused at more than 16 amps the ESP 120 M1, ESP 240 M1 orESP 277 M1 are suitable.

ApplicationUse these protectors on lowcurrent mains power supplies, e.g.CCTV cameras, alarm panels andtelemetry equipment.

InstallationConnect in-line with the powersupply usually either within theequipment panel (or for CCTVcameras, in an enclosure close by),or on the fused connection thatsupplies equipment.

Ready boxed protector (here an ESP 240-5A/BX)installed on the fused connection (spur) to analarm panel

Connect in-line on supplies fused up to 5A(ESP 120-5A, ESP 240-5A or ESP 277-5A) or

16A (ESP 120-16A, ESP 240-16A orESP 277-16A). Note how the protector can

also be earthed from its earth stud

Connect in-line on supplies fused up to 5A(ESP 120-5A/BX, ESP 240-5A/BX or

ESP 277-5A/BX) or 16A (ESP 120-16A/BX,ESP 240-16A/BX or ESP 277-16A/BX).

Note how the protector can also be earthedfrom its earth stud

DIRTY

Earth

CLEAN

From lineTo

equipment

DIRTY

Earth

CLEAN

From lineTo

equipment

To protect equipment inside abuilding from transients enteringon an outgoing feed (e.g. to CCTVcameras or to site lighting) theprotector should be installed asclose to where the cable leavesthe building as possible. Unlessready-boxed, protectors should beinstalled either within an existingcabinet/cubicle or in a separateenclosure.

AccessoriesIf several ESP 120-5A or 16A,ESP 240-5A or 16A or ESP 277-5Aor 16A protectors are to beinstalled together, or if one is inuse alongside Lightning Barriersfor video or signal lines, these canbe simultaneously mounted andearthed on a CME kit and housedin a suitable WBX enclosure.

Electronic Systems Protection | Low current mains supplies

ESP 5A/BX and 16A/BX Series

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38

MAINSTESTTYPE2 + 3


LPZ1→3

eENHANCED


BXIP66

Electrical specification ESP 120-5A ESP 120-16A ESP 240-5A ESP 240-16A ESP 277-5A ESP 277-16AESP 120-5A/BX ESP 120-16A/BX ESP 240-5A/BX ESP 240-16A/BX ESP 277-5A/BX ESP 277-16A/BX





Current rating (supply) 5A or less 16A or less 5A or less 16A or less 5A or less 16A or less

Back-up fuse (see installation instructions) 5A 16A 5A 16A 5A 16A

Leakage current (to earth) <0.5mA

Transient specification 120 volt protectors 240 volt protectors 277 volt protectorsType 2 (BS EN), Class II (IEC)


Let-through voltage Up at In1 450V 750V 790V




390V 590V 670V

1 The maximum transient voltage let-through of the protector throughout the test (±5%), phase to neutral, phase to earth and neutral to earth.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.3 Combination wave test within BS 6651:1999 App. C, Cats C-Low & B-High, IEEE C62.41-2002 Location Cats C1 & B3, SS CP 33:1996 App. F, AS 1768-1991App. B, Cat B, UL1449 mains wire-in

Mechanical specification ESP 120-5A ESP 120-16A ESP 240-5A ESP 120-5A/BX ESP 120-16A/BX ESP 240-5A/BXESP 240-16A ESP 277-5A ESP 277-16A ESP 240-16A/BX ESP 277-5A/BX ESP 277-16A/BX

Temperature range –40 to +70ºC –40 to +70ºC

Connection type Screw terminal Screw terminal

Conductor size (solid) 4mm2 4mm2

Earth connection Via earth terminal or M6 stud Via earth terminal or M6 stud

Cable glands–

-5A/BX 4.8 – 8mm cable (PG9)-16A/BX 8 – 12mm cable (PG13.5)

Degree of protection (IEC 60529) IP20 IP66

Case material Steel PVC


Weight – packaged 0.25kg 0.31kg

Dimensions

Low current mains supplies | Electronic Systems Protection

ESP 5A/BX and 16A/BX Series

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39

Combined Type 2 and 3 tested protector (to BS EN/IEC 61643) withtelecom or network protection options. Suitable for use on220/230/240 volts supplies. Available with British style (threesquare pin) plugs and sockets with double-pole action. For use atboundaries LPZ 1 through to LPZ 3 to protect sensitive electronicequipment.

Features and benefits✔ Low let-through voltage between all sets of conductors

✔ Three way visual indication of protection status

✔ Protects against radio frequency interference

✔ TN and Cat-5e versions can conveniently protect both mains andtelecom/data lines in one unit

✔ Rugged, heavy duty construction

✔ Bracket kit ESP MC/19BK available for rear or 19” rack mounting


For wire-in applications up to 16 amps, the 16A/BX Series may be more suitable. For allother supplies, consider the M1 Series.

ApplicationESP MC series can be used toprotect all sorts of plug-inequipment, including hospitallaboratory equipment, modems,fax machines and PCs.

InstallationSimply plug the ESP MC series intothe mains and your equipmentinto the ESP MC.

RFI performancePer CISPR 17:A = 50Ω/50Ω sym, B = 50Ω/50Ωasym, C = 0.1Ω/100Ω sym,D = 100Ω/0.1Ω sym

AccessoriesESP MC/19BK bracket kit can beused for rear mounting, orreversed for use in 19” cabinets.All fixings supplied.

ESP MC installed within a network rack,protecting the externally-fed

network switch

Electronic Systems Protection | Plug-in protection for mains power supplies

ESP MC Series

www.furse.com

40

SIGNAL/TELECOM

TEST CATD + C + B


eENHANCED


MAINSTESTTYPE2 + 3

LPZMains 1→3

Data 0B→3

41

www.furse.com

ESP MC Series

Plug-in protection for mains power supplies | Electronic Systems Protection

Electrical specification – mains ESP MC ESP MC/TN/RJ11-4/6 ESP MC/Cat-5e

Nominal voltage - Phase - Neutral Uo (RMS) 220/230/240V

Maximum voltage - Phase-Neutral Uc (RMS) 280V


Current rating (supply) 13A

Leakage current (to earth) <0.5mA

Electrical specification – telecom/data

Nominal voltage – 296V 5V

Maximum working voltage Uc1 – 296V 5V2

Current rating (signal) – 300mA 300mA

In-line resistance (per line ±10%) – 4.4Ω 1Ω

Bandwidth (–3dB 50Ω system) – 20MHz –

Maximum data rate – 100Mbps1 Maximum working voltage (DC or AC peak) of telecom/data protection measured at <10μA leakage for ESP MC/TN/RJ11-4/6 and 1mA for ESP MC/Cat-5e.2 Maximum working voltage is 5V for data pairs 1/2 & 3/6.

Transient specification – mains ESP MC ESP MC/TN/RJ11-4/6 ESP MC/Cat-5eType 2 (BS EN), Class II (IEC)


Let-through voltage Up at In1 850V



Let-through voltage at Uoc of 6kV 1.2/50 and Isc of3kA 8/20 (per mode)3

680V

Let-through voltage at Uoc of 6kV 1.2/50 and Isc of500A 8/20 (per mode)4

555V

1 The maximum transient voltage let-through of the protector throughout the test (±5%), phase to neutral, phase to earth and neutral to earth.2 The electrical system, external to the unit, may constrain the actual current rating achieved in a particular installation.3 Combination wave test within BS 6651:1999 App. C, Cats C-Low & B-High, IEEE C62.41-2002 Location Cats C1 & B3, SS CP 33:1996 App. F, AS 1768-1991App. B, Cat B, UL1449 mains wire-in

4 To BS 6651:1999 Appendix C, Category A-High, UL1449 mains plug-in

Transient specification – telecom/data

Let-through voltage (all conductors)1 Up

C2 test 4kV 1.2/50μs, 2kA 8/20μs to BS EN/IEC 61643-21– line to line / line to earth – 390V / 390V 120V / 700V3

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs to BS EN/IEC 61643-21– line to line / line to earth – 395V / 395V 74V / 600V3

B2 test 4kV 10/700μs to BS EN/IEC 61643-21– line to line / line to earth – 295V / 295V 21V / 550V3

5kV, 10/700μs2

– line to line / line to earth – 300V / 300V 25V / 600V3

Maximum surge current4

D1 test 10/350μs to BS EN/IEC 61643-21 – 1kA 1kA

8/20μs to ITU (formerly CCITT), BS 6651:1999 Appendix C – 10kA 10kA

1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & line to earth. Response time <10ns.2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002, ANSI

TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).3 The interfaces used in Cat-5/5e systems incorporate an isolation transformer that inherently provides an inbuilt immunity to transients between line and earth of

1,500 volts or more.4 The installation and connectors external to the protector may limit the capability of the protector.

Mechnical specification ESP MC ESP MC/TN/RJ11-4/6 ESP MC/Cat-5e

Temperature range –25°C to +70ºC

Connection type Via British style three square pin plug and socket to BS 1363

Connection type – telecom/data – RJ11 RJ45

Earth connection Via plug and socket

Case material Steel

Weight – unit 1.70kg 1.75kg 1.75kg

Weight – packaged 1.75kg 1.8kg 1.8kg

Dimensions

NEW NEW

422 mm(as a free standing unit)

482.6 mm(19 inch, when fitted with ESP MC/19BK brackets)

76.2 mmLead Length 1.35m

Depth 42 mm 88 mm (2U)

Ethernet RJ45 connections Telephone RJ11 connections

42

www.furse.comElectronic Systems Protection | Data/signal and telecom product selector

Data/signal and telecom product selector

Selection guide –data/signal and telecom systems

Installation Locations

Common applications Service entrance Critical terminal equipment – located>20m from service entrance

Analogue Telecom systems(see Furse Application Note AN005)– for systems terminating on twisted pair cabling

– for systems terminating on BT type socket

ESP TN, ESP TN/BX,ESP TN/2BX

See pages 44 & 50

New ESP MC/TN/RJ11-/6(e.g. fax machines/modems)

See page 40

ESP TN/JPSee page 60

– for PBX systems terminating of LSA-Plus disconnection modulesESP KT1 SeriesSee page 62

Computer Networks(see Furse Application Note AN004) ESP Cat-5 Series

See page 64

ESP LN Series,New ESP MC/Cat-5eSee page 68 & 40

Data interfaces– RS 232 ESP 15D

See page 44ESP LA SeriesSee page 66

– RS 422, RS 423, RS 485ESP 06E

See page 46ESP LB SeriesSee page 66

Protectors for specific systems

System Protector

ISDN telecom systems(see Furse Application Note AN002, AN005) ESP KT2 Series,

ESP ISDN SeriesSee pages 60 & 62

Coaxial CCTV systemsESP CCTV/BSee page 76

Cable TV systems (see Furse Application Note AN006)ESP TV SeriesSee page 80

4-20mA loops and low current telemetry systems ESP D, ESP Q andESP KS Series

See pages 44, 52 & 54

Data and telecom interfaces at PCB level(see Furse Application Note AN003) ESP PCB Series

See page 56 & 57

DC systems up to 110V, 4AESP H SeriesSee page 48

RTD systems(see Furse Application Note AN001) ESP RTD and ESP Q Series

See page 52 & 58

RF radio and antenna communication systemsESP RF SeriesSee page 72

43

www.furse.com

Protectors for data communicationand signal lines

ESP D/E/H Series 44 – 49A versatile range of protectors suitable for use on most twisted pair data communication, signal and telephone lines

ESP D/BX Series 50 – 51Based on the versatile ESP D Series and ESP TN (p44 – 45), these protectors are ready-boxed to IP66 for use on 2 or 4wire twisted pair data communication, signal and telephone lines

ESP Q Series 52 – 53Space saving protectors for use on signal and data lines in petrochemical and other space/size critical applications

ESP KS and KE Series 54 – 55Protectors for signal, data, control and instrumentation systems with LSA-PLUS disconnection modules

ESP PCB/D, PCB/TN and PCB/E Series 56 – 57PCB mount versions of the popular ESP D, TN and E Series protectors for data communication, signal and telephoneequipment

ESP RTD 58Three wire protectors specifically designed for RTD applications

Protectors for data communication and signal lines | Electronic Systems Protection

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for most twisted pair signalling applications. Available forworking voltages of up to 6, 15, 30, 50 and 110 volts. ESP TNsuitable for Broadband, POTS, dial-up, T1/E1, lease line and *DSLtelephone applications. For use at boundaries up to LPZ 0A toprotect against flashover (typically the service entrance location)through to LPZ 3 to protect sensitive electronic equipment.


between all lines – Full Mode protection



✔ Low in-line resistance minimises unnecessary reductions insignal strength

✔ Strong, flame retardant, ABS housing

✔ Supplied ready for flat mounting on base or side

✔ Built-in DIN rail foot for simple clip-on mounting to top hat DIN rails

✔ Colour coded terminals give a quick and easy installation check –grey for the dirty (line) end and green for the clean end

✔ Screen terminal enables easy connection of cable screen to earth

✔ Substantial earth stud to enable effective earthing

✔ Integral earthing plate for enhanced connection to earth via a CME kit

✔ ESP 06D has Network Rail Approval PA05/00809. NRS PADS reference086/000551

✔ ESP TN is suitable for telecommunication applications in accordancewith Telcordia and ANSI Standards (see Application Note AN005)

ApplicationUse on twisted pair lines, e.g.those found in process controlequipment, modems andcomputer communicationsinterfaces.

InstallationConnect in series with the datacommunication or signal lineeither near where it enters orleaves the building or close to theequipment being protected (e.g.within its control panel). Eitherway, it must be very close to thesystems earth star point. Installprotectors either within anexisting cabinet/cubicle or in aseparate enclosure.

Protectors can be flat mounted via their base (left) or side,or mounted on top hat DIN rail (right) via an integral springloaded DIN rail foot

Install in series (in-line)

DIRTY CLEAN

From lineTo

equipmentEarth

AccessoriesCombined Mounting/Earthing kits

CME 4Mount & earth up to 4 protectors




Weatherproof enclosures

WBX 2/GFor use with up to 2 protectors


WBX 4For use with a CME4 and up to4 protectors

WBX 8For use with a CME 8 and up to8 protectors

WBX 16/2/GFor use with one or two CME 16and up to 32 protectors

Electronic Systems Protection | Twisted pair data, signal and telephone lines

ESP D and TN Series

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44


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

300mARATING

LOW INLINE

9.4ΩRESISTANCE

LPZ0A→3

Twisted pair data, signal and telephone lines | Electronic Systems Protection

ESP D and TN Series

www.furse.com

45Derivatives of these protectors are available ready-boxed to IP66, for use in damp or dirty environments, PCB mount versions are also available.If your system requires a protector with a very low resistance or higher current, see the E & H Series. Also use the E Series for systems needing ahigher bandwidth. A Protector for 3-wire RTD (ESP RTD) is available, as are the space saving protectors (Q Series). The KT and TN Series’ areadditional protectors specifically for telephone lines. The KS Series are protectors for data and signal lines on an LSA-PLUS module.

Electrical specification ESP 06D ESP 15D ESP 30D ESP 50D ESP 110D ESP TN

Nominal voltage1 6V 15V 30V 50V 110V –

Maximum working voltage2 Uc 7.79V 19V 37.1V 58V 132V 296V

Current rating (signal) 300mA

In-line resistance (per line ±10%) 9.4Ω 9.4Ω 9.4Ω 9.4Ω 9.4Ω 4.4Ω

Bandwidth (–3dB 50Ω system) 800kHz 2.5MHz 4MHz 6MHz 9MHz 20MHz

1 Nominal voltage (DC or AC peak) measured at <5μA (ESP 15D, ESP 30D, ESP 50D, ESP 110D) and <200μA (ESP 06D)2 Maximum working voltage (DC or AC peak) measured at <1mA leakage (ESP 15D, ESP 30D, ESP 50D, ESP 110D), <10mA (ESP 06D) and <10μA (ESP TN)

Transient specification ESP 06D ESP 15D ESP 30D ESP 50D ESP 110D ESP TN


C2 test 4kV 1.2/50μs, 2kA 8/20μs to BS EN/IEC61643-21

12.0V 25.0V 44.0V 78.0V 155V 395V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs toBS EN/IEC 61643-21

11.5V 24.5V 43.5V 76.0V 150V 390V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 10.0V 23.0V 42.5V 73.0V 145V 295V

5kV, 10/700μs2 10.5V 23.8V 43.4V 74.9V 150V 300V

Maximum surge current

D1 test 10/350μs to BS EN/IEC 61643-21– per signal wire– per pair

2.5kA5kA

8/20μs to ITU (formerly CCITT), BS 6651:1999Appendix C– per signal wire– per pair

10kA20kA

1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & line to earth, both polarities. Response time <10ns2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002,

ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).

Mechanical specification ESP 06D ESP 15D ESP 30D ESP 50D ESP 110D ESP TN



Conductor size (stranded) 2.5mm2

Earth connection M6 stud

Case material ABS UL94 V-0

Weight – unit 0.08kg

Weight – packaged (per 10) 0.85kg

Dimensions

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for twisted pair signalling applications which require eithera lower in-line resistance, an increased current or a higherbandwidth than the D Series. Also suitable for DC powerapplications less than 1.25 amps. Available for working voltages ofup to 6, 15, 30, 50 and 110 volts. For use at boundaries up to LPZ 0Ato protect against flashover (typically the service entrance location)through to LPZ 3 to protect sensitive electronic equipment.





✔ Very low (1Ω) in-line resistance allows resistance critical applications(e.g. alarm loops) to be protected

✔ High (1.25A) maximum running current

✔ High bandwidth enables higher frequency (high traffic or bit rate)data communications



✔ Built-in DIN rail foot for simple clip-on mounting to tophat DIN rails

✔ Colour coded terminals give a quick and easy installationcheck – grey for the dirty (line) end and green for clean



✔ Integral earthing plate for enhanced connection to earth via CME kit

✔ ESP 06E and ESP I5E have Network Rail Approval PA05/02047.NRS PADS reference 086/000201 (ESP 06E) and 086/000200 (ESP 15E)

ApplicationUse these units to protectresistance sensitive, higherfrequency or running currentsystems, e.g. high speed digitalcommunications equipment orsystems with long signal lines.

InstallationConnect in series with the datacommunication or signal lineeither near where it enters orleaves the building or close to theequipment being protected (e.g.within its control panel). Eitherway, it must be very close to thesystems earth star point. Installprotectors either within anexisting cabinet/cubicle or in aseparate enclosure.


DIRTY CLEAN

From lineTo

equipmentEarth












Protectors installed on a combined mounting and earthing kit(CME 8) within a WBX 8 enclosure

Electronic Systems Protection | Twisted pair data and signal lines

ESP E Series

www.furse.com

46


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

1.25ARATING

LOW INLINE

1ΩRESISTANCE

HIGHBANDWIDTH

A PCB mount version is available. For many twisted pair data and signal applications, the lower cost D Series may be suitable. For applicationsrequiring higher current (1.25A – 4A) or ultra low in-line resistance, the protectors H Series may be more suitable. For data and signal lines onLSA-PLUS modules, use the KS Series.

Twisted pair data and signal lines | Electronic Systems Protection

ESP E Series

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47

Electrical specification ESP 06E ESP 15E ESP 30E ESP 50E ESP 110E

Nominal voltage1 1 6V 15V 30V 50V 110V

Maximum working voltage Uc2 7.79V 16.7V 36.7V 56.7V 132V

Current rating (signal) 1.25A

In-line resistance (per line ±10%) 1.0Ω

Bandwidth (–3dB 50Ω system) 1.5MHz >85MHz >85MHz >85MHz >85MHz

1 Nominal voltage (DC or AC peak) measured at <10μA (ESP 15E, ESP 30E, ESP 50E, ESP 110E) and <200μA (ESP 06E).2 Maximum working voltage (DC or AC peak) measured at <5mA leakage (ESP 15E, ESP 30E, ESP 50E, ESP 110E) and <10mA (ESP 06E).

Transient specification ESP 06E ESP 15E ESP 30E ESP 50E ESP 110E



17.0V 39.0V 60.0V 86.0V 180V


11.5V 28.0V 49.0V 73.5V 170V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 10.5V 25.5V 43.5V 65.0V 160V

5kV, 10/700μs2 10.8V 26.2V 44.3V 65.8V 165V



2.5kA5kA


10kA20kA

1 The maximum transient voltage let-through of the protector throughout the test (±10%), line to line & line to earth, both polarities. Response time <10ns.2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002,


Mechanical specification ESP 06E ESP 15E ESP 30E ESP 50E ESP 110E








Dimensions

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for twisted pair signalling applications which require eithera lower in-line resistance or an increased current than the D or ESeries. Also suitable for DC power applications less than 4 amps.Available for working voltages of up to 6, 15, 30, 50 and 110 volts.For use at boundaries up to LPZ 0A to protect against flashover(typically the service entrance location) through to LPZ 3 to protectsensitive electronic equipment.





✔ Ultra low (<0.05Ω) in-line resistance allows resistance criticalapplications (e.g. alarm loops) to be protected

✔ Very high (4A) maximum running current

✔ Strong, flame retardant ABS housing


✔ Built-in DIN rail foot for simple clip-on mounting to top hat DIN rails

✔ Colour coded terminals give a quick and easy installation check –grey for the dirty (line) end and green for clean



✔ Integral earth plate enables enhanced connection to earth via CME kit

ApplicationUse these applications to protectresistance sensitive or higherrunning current systems, e.g.systems with long signal lines, orDC power applications.

InstallationConnect in series with the datacommunication or signal lineeither near where it enters orleaves the building or close to theequipment being protected (e.g.within the control panel). Eitherway, it must be very close to thesystem’s earth star point. Installprotectors either within anexisting cabinet/cubicle or in aseparate enclosure.

Two ESP 15H protectors mounted in a control cabinet andearthed via the cabinets’ earthed chassis


DIRTY CLEAN

From lineTo

equipmentEarth












Electronic Systems Protection | Twisted pair data and signal lines

ESP H Series

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48


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

4ARATING

LOW INLINE

0.05ΩRESISTANCE

For some data and signal applications with lower current, higher in line resistance or higher bandwidth requirements, the D or E Seriesprotectors may be more suitable. If the protector is to be mounted directly onto a PCB, use the ESP PCB/**D or ESP PCB/**E protectors.

Twisted pair data and signal lines | Electronic Systems Protection

ESP H Series

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49

Electrical specification ESP 06H ESP 15H ESP 30H ESP 50H ESP 110H

Nominal voltage1 6V 15V 30V 50V 110V

Maximum working voltage Uc 2 7.79V 16.7V 36.7V 56.7V 132V

Current rating (signal) 4A


Bandwidth (–3dB 50Ω system) 160KHz 140KHz 130KHz 120KHz 120KHz

1 Nominal voltage (DC or AC peak) measured at <10μA (ESP 15H, ESP 30H, ESP 50H, ESP 110H) and <200μA (ESP 06H).2 Maximum working voltage (DC or AC peak) measured at <5mA leakage (ESP 15H, ESP 30H, ESP 50H, ESP 110H) and <10mA (ESP 06H).

Transient specification ESP 06H ESP 15H ESP 30H ESP 50H ESP 110H



12.0V 27.5V 46.0V 67.0V 150V


11.0V 26.5V 45.0V 66.5V 145V


5kV, 10/700μs2 10.8V 26.2V 44.3V 65.8V 145V



2.5kA5kA


10kA20kA



Mechanical specification ESP 06H ESP 15H ESP 30H ESP 50H ESP 110H








Dimensions

50

www.furse.com

ESP D/BX Series

Electronic Systems Protection | Twisted pair data, signal and telephone lines

Combined Category D, C, B tested protector (to BS EN/IEC 61643)based on the ESP D Series and ESP TN but ready boxed to IP66 foruse in damp or dirty environments. Suitable for most twisted pairsignalling applications. Available for working voltages of up to 6,15, 30, 50 and 110 volts. ESP TN suitable for Broadband, POTS,dial-up, T1/E1, lease line and *DSL telephone applications. For useat boundaries up to LPZ 0A to protect against flashover (typicallythe service entrance location) through to LPZ 3 to protect sensitiveelectronic equipment.





✔ Low in-line resistance minimises unnecessary reductions insignal strength

✔ Ready-boxed to IP66 and supplied ready for flat mounting

✔ Available with screw terminals or with IDC terminals (by adding /I suffixto part number)

✔ Colour coded terminals for quick and easy installation check –grey for the dirty (line) end and green for clean



✔ ESP TN/BX and ESP TN/2BX are suitable for telecommunicationapplications in accordance with Telcordia and ANSI Standards (seeApplication Note AN005)

✔ Supplied as standard with screw terminals – for IDC terminals orderpart code plus /I (e.g. ESP TN/BX/I)

✔ ESP TN/BX has Network Rail Approval PA05/02877. NRS PADS reference087/037286

For installation in the equipment panel, protectors which are not boxed may be moresuitable. If your system requires a protector with a very low resistance, higher current orhigher bandwidth use the E or H Series. Unboxed protectors for 3-wire RTD systems areavailable – as are plug-in protectors for telephone lines.

ApplicationUse these ready-boxed protectorson twisted pair lines in dirty ordamp environments.

For two wire lines, use /BXversions. For four wire lines,use /2BX versions.

InstallationConnect in series with the datacommunication, signal ortelephone line either near whereit enters/leaves the building orclose to the equipment beingprotected. Either way, it must bevery close to the systems earthstar point.

Security alarm panel with ESP TN/BX(bottom) providing protection from

transient overvoltages on the dial-uptelephone line. Note how the ESP TN/BX isearthed via a bond to the ESP 240-16A/BX

(top) installed on the mains power supply tothe panel


DIRTY CLEAN

From lineTo

equipment

Earth

ESP 30D/2BX with lid removed to showinternal connections. Note the colour coded,

grey and green, terminals


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

LOW INLINE

9.4ΩRESISTANCE

BXIP66

CURRENT

300mARATING

51

www.furse.com

ESP D/BX Series

Twisted pair data, signal and telephone lines | Electronic Systems Protection

Electrical specification ESP 06D/BX ESP 15D/BX ESP 30D/BX ESP 50D/BX ESP 110D/BX ESP TN/BXESP 06D/2BX ESP 15D/2BX ESP 30D/2BX ESP 50D/2BX ESP 110D/2BX ESP TN/2BX

Nominal voltage1 6V 15V 30V 50V 110V -

Maximum working voltage Uc2 7.79V 19V 37.1V 58V 132V 296V



Bandwidth (-3dB 50Ω system) 800kHz 2.5MHz 4MHz 6MHz 9MHz 20MHz

1 Nominal voltage (DC or AC peak) measured at <5μA (ESP 15D/BX, ESP 15D/2BX, ESP 30D/BX, ESP 30D/2BX, ESP 50D/BX, ESP 50D/2BX, ESP 110D/BX,ESP 110D/2BX) and <200μA (ESP 06D/BX & ESP 06D/2BX).

2 Maximum working voltage (DC or AC peak) measured at <1mA leakage (ESP 15D/BX, ESP 15D/2BX, ESP 30D/BX, ESP 30D/2BX, ESP 50D/BX, ESP 50D/2BX,ESP 110D/BX, ESP 110D/2BX), <10mA (ESP 06D/BX, ESP 06D/2BX) and <10μA (ESP TN/BX, ESP TN/2BX).

Transient specification ESP 06D/BX ESP 15D/BX ESP 30D/BX ESP 50D/BX ESP 110D/BX ESP TN/BXESP 06D/2BX ESP 15D/2BX ESP 30D/2BX ESP 50D/2BX ESP 110D/2BX ESP TN/2BX


C2 test 4kV 1.2/50μs, 2kA 8/20μs toBS EN/IEC 61643-21

12.0V 25.0V 44.0V 78.0V 155V 395V


11.5V 24.5V 43.5V 76.0V 150V 390V


5kV, 10/700μs2 10.5V 23.8V 43.4V 74.9V 150V 300V

Maximum surge currentD1 test 10/350μs to BS EN/IEC 61643-21

– per signal wire 2.5kA

– per pair 5kA

8/20μs to ITU (formerly CCITT), BS 6651:1999Appendix C

– per signal wire 10kA

– per pair 20kA

1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & line to earth, both polarities. Response time <10ns.2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002,ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).

Mechanical specification ESP 06D/BX ESP 15D/BX ESP 30D/BX ESP 50D/BX ESP 110D/BX ESP TN/BXESP 06D/2BX ESP 15D/2BX ESP 30D/2BX ESP 50D/2BX ESP 110D/2BX ESP TN/2BX


Connection type Screw terminal – for IDC terminal use part number with /I



Cable glands Accommodate 2.3 – 6.7mm diameter cable (PG7)


Case material PVC


Weight – packaged 0.35kg

Dimensions

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for 4 twisted pair lines (ESP 06Q, ESP 15Q, ESP 30Q,ESP 50Q and ESP TNQ). Protection for three 3-wire lines (ESP RTDQ).Available for working voltages of up to 6, 15, 30, 50 and 110 volts.ESP TNQ suitable for Broadband, POTS, dial-up, T1/E1, lease line and*DSL telephone applications. For use at boundaries up to LPZ 0A toprotect against flashover (typically the service entrance location)through to LPZ 3 to protect sensitive electronic equipment.





✔ ESP RTDQ protects three 3-wire lines in RTD applications

✔ Almost twice as space efficient as smallest competitor

✔ Standard DIN module (18mm) depth

✔ Removable (plug-in) terminals allow pre-wiring of cable looms, foreasier installation

✔ Built-in DIN rail foot for clip-on mounting to top hat or G DIN rails

✔ Optional flat mounting on side

✔ 2.5mm2 terminals allow for larger cross section wiring, stranded wiresterminated with ferrules or fitting two wires into a single terminal

✔ Very low resistance to minimise unwanted signal strength reductions


✔ Colour coded terminals (grey for line, green for clean) give a quick andeasy installation check


✔ Simple, yet substantial, connection to earth via DIN rail

✔ ESP TNQ is suitable for telecommunication applications in accordancewith Telcordia and ANSI Standards (see Application Note AN005)

✔ Available as a ‘UL Listed’ version, add /UL to part code (ESP 06Q,ESP 15Q, ESP 30Q and ESP 50Q only)

Protectors for individual data and signal lines are available (D Series), or ready-boxed toIP66 (ESP **D/BX etc). Alternatively, for individual protectors with higher current orbandwidth use the E and H Series. For individual wire-in protectors for RTD applications,use the ESP RTD.

ApplicationUse these protectors whereinstallation space is at a premiumand large numbers of lines requireprotection.

For further information on RTDapplications, see separateApplication Note AN001 (contactFurse for a copy).

InstallationConnect in series with the signalor data line either near where itenters or leaves the building orclose to the equipment beingprotected. Install in acabinet/cubicle close to thesystems earth star point.

ESP 06Q, ESP 15Q, ESP 30Q, ESP 50Q,ESP 110Q and ESP TNQ installed in series

(in-line)

DIRTY CLEAN

Fromline

ToequipmentEarth

ESP RTDQ installed in series (in-line)

DIRTY CLEAN

Fromline

ToequipmentEarth

The Q Series can be earthed via DIN rail, orvia the M5 threaded hole in its base

A Q Series protector mounted on a top hatDIN rail. Note the plug-in terminals foreasier installation in confined spaces

Electronic Systems Protection | High density data, signal and telephone lines

ESP Q, TNQ and RTDQ Series

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52


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

ULTRACOMPACT

DESIGN

CURRENT

750mARATING

High density data, signal and telephone lines | Electronic Systems Protection

ESP Q, TNQ and RTDQ Series

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53

Electrical specification ESP 06Q ESP 15Q ESP 30Q ESP 50Q ESP 110Q ESP TNQ ESP RTDQ

Nominal voltage1 6V 15V 30V 50V 110V - 6V

Maximum working voltage Uc2 7.78V 18.8V 37.8V 57.8V 132V 296V 7.78V

Current rating (signal) 750mA 750mA 750mA 750mA 750mA 300mA 700mA

In-line resistance (per line ±10%) 1.0Ω 1.0Ω 1.0Ω 1.0Ω 1.0Ω 4.3Ω 1.0Ω

Bandwidth (-3dB 50Ω system) 1MHz 2.5MHz 6MHz 5MHz 15MHz 20MHz 800kHz1 Nominal voltage (DC or AC peak) measured at <5μA (ESP 15Q, ESP 30Q, ESP 50Q, ESP 110Q) and <200μA (ESP 06Q, ESP RTDQ).2 Maximum working voltage (DC or AC peak) measured at <5mA leakage (ESP 15Q, ESP 30Q, ESP 50Q, ESP 110Q), <10mA (ESP 06Q, ESP RTDQ) and

<10μA (ESP TNQ).

Transient specification ESP 06Q ESP 15Q ESP 30Q ESP 50Q ESP 110Q ESP TNQ ESP RTDQ



15.0V 28.0V 53.0V 84.0V 188V 395V 15.0V


12.5V 26.5V 48.0V 76.0V 175V 390V 12.5V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 10.0V 23.0V 43.5V 64.5V 145V 295V 10.0V

5kV, 10/700μs2 10.8V 26.2V 44.3V 65.8V 150V 300V 10.5V

Maximum surge currentD1 test 10/350μs to BS EN/IEC 61643-21

– per signal wire 2.5kA

– per pair 5kA



– per pair 20kA


Mechanical specification ESP 06Q ESP 15Q ESP 30Q ESP 50Q ESP 110Q ESP TNQ ESP RTDQ


Connection type Plugable 12 way screw terminal


Earth connection Via DIN rail or M5 threaded hole in base of unit



Weight – packaged (each) 0.12kg


Dimensions

M3 clearance

Max depth=18mm

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for use on ten line LSA-PLUS disconnection modules toprotect individual twised pair data or signal lines. For use atboundaries up to LPZ 0B to protect against flashover (typically theservice entrance location) through to LPZ 3 to protect sensitiveelectronic equipment.

Features and benefits✔ Low cost protection for large numbers of data and signal lines

✔ Very low let-through voltage (enhanced protection to BS EN 62305)between all lines – Full Mode protection



✔ Colour of housing distinguishes electrically different protectors to helpavoid confusion when installed with other protectors (e.g. the ESPKT1/2) on the same distribution frame

✔ Quick and easy plug-in installation

✔ Protect only the lines you need

✔ Ridged finger holds make it easy to obtain a firm grip for installationor removal

✔ Use the ESP KE10 to provide trouble free earthing for up toten protectors (per disconnection module)

For PSTN and U interface ISDN lines on LSA-PLUS modules, use the ESP KT1 or ESP K10T1. For S/T interface ISDN lines on LSA-PLUS modules, usethe ESP KT2 or ESP K10T2. For individual twisted pair data or signal lines, use the D, E or H Series Lightning Barriers. The Q Lightning Barriers aresuitable for high density data and signal lines.

ApplicationUse these units to protect signal,data, control and instrumentationsystems with LSA-PLUSdisconnection modules.

InstallationInstall protectors on all datacommunication and signal linesthat enter or leave each building.

All protectors must be installed viathe ESP KE10 earth bar.Identify the lines requiringprotection and clip the ESP KE10on to the disconnection modules’earth points. Plug the protectordirectly into each disconnectionmodule requiring protection(ensuring the correct orientation)for a series connection.

Having pushed the ESP KE10 earth bar onto the disconnection modules’ earth points,

firmly push an ESP KS06 (or ESP KS15,ESP KS30 or ESP KS50) into each line/pair

requiring protection

Single line protectors installed on LSA-PLUS disconnectionmodules, via ESP KE10 earth bars, on all incoming signaland data lines

In the unlikely situation that theprotector is damaged, it willsacrifice itself and fail short circuit,taking the line out of commission.In addition to indicating that theprotector needs replacing, this willalso prevent subsequent transientsfrom damaging the equipment.

Electronic Systems Protection | Data & signal lines with LSA-PLUS modules

ESP KS and KE Series

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54


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

150mARATING

LPZ0B→3

Data & signal lines with LSA-PLUS modules | Electronic Systems Protection

ESP KS and KE Series

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55

Electrical specification ESP KS06 ESP KS15 ESP KS30 ESP KS50

Nominal voltage1 6V 15V 30V 50V

Maximum working voltage Uc2 7.78V 16.7V 33.4V 58V


In-line resistance (per line ±10%) 10Ω 22Ω 22Ω 22Ω

Bandwidth (-3dB 50Ω system) 2MHz 5MHz 5MHz 5MHz

1 Nominal voltage (DC or AC peak) at 200μA for ESP KS06 and at 5μA for ESP KS15, ESP KS30 and ESP KS50.2 Maximum working voltage (DC or AC peak) at 10mA for ESP KS06, at 1mA for ESP KS15 and ESP KS30, and at 5μA for ESP KS50.

Transient specification ESP KS06 ESP KS15 ESP KS30 ESP KS50



16.0V 26.5V 48.0V 98.0V


14.5V 24.0V 46.5V 84.5V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 11.5V 23.0V 45.0V 75.0V

5kV, 10/700μs2 12.0V 24.4V 48.8V 80.0V


D1 test 10/350μs to BS EN/IEC 61643-21


– per pair 2kA



– per pair 10kA


3 The installation and connections external to the protector may limit the capability of the protector.

Mechanical specification ESP KS06, ESP KS15, ESP KS30, ESP KS50 ESP KE10

Temperature range –25 to +70ºC –

Connection type To LSA-PLUS disconnection modules (BT part number 237A)

Earth connection Via ESP KE10 earth bar –

Material ABS UL94 V-0 Stainless Steel


Weight – packaged 0.10kg (per 10) 0.12kg (per 10)

Dimensions

Electrical specification ESP PCB/06D ESP PCB/15D ESP PCB/30D ESP PCB/50D ESP PCB/110D ESP PCB/TN

Nominal voltage1 6V 15V 30V 50V 110V -

Maximum working voltage Uc2 7.79V 19V 37.1V 58V 132V 296V



Bandwidth (-3dB 50Ω system) 800kHz 2.5MHz 4MHz 6MHz 9MHz 20MHz1 Nominal voltage (DC or AC peak) measured at <5μA (ESP PCB/15D, ESP PCB/30D, ESP PCB/50D, ESP PCB/110D) and <200μA (ESP PCB/06D).2 Maximum working voltage (DC or AC peak) measured at <1mA leakage (ESP PCB/15D, ESP PCB/30D, ESP PCB/50D, ESP PCB/110D), <10mA (ESP PCB/06D) and

<10μA (ESP PCB/TN).

Transient specification ESP PCB/06D ESP PCB/15D ESP PCB/30D ESP PCB/50D ESP PCB/110D ESP PCB/TN



12.0V 25.0V 44.0V 78.0V 155V 395V


11.5V 24.5V 43.5V 76.0V 150V 390V


5kV, 10/700μs2 10.5V 23.8V 43.4V 74.9V 150V 300V



– per signal wire / per pair 2.5kA / 5kA


– per signal wire / per pair 10kA / 20kA



Mechanical specification ESP PCB/D & PCB/TN Series


Connection type 0.64mm (0.025”) square PCB pins,1.2mm diameter PCB holes

recommended


Dimensions

Combined Category D, C, Btested protector (toBS EN/IEC 61643) for “throughhole” mounting directly ontothe PCB of data communication,signal or telephone equipment.Available for working voltagesof up to 110V. ESP TN suitablefor Broadband, POTS, dial-up,T1/E1, lease line and *DSLtelephone applications. For useat boundaries up to LPZ 0A toprotect against flashover(typically the service entrancelocation) through to LPZ 3 toprotect sensitive electronicequipment.

InstallationConnect in series, soldering pinsdirect onto PCB. Tracks to line andearth pins should be as wide aspractical (see Furse ApplicationNote AN003).

Features and benefits✔ Suitable for wave soldering




✔ Low in-line resistance minimises unnecessary reductions in signal strength

✔ 2 pin clean end and 3 pin line end to ensure correct insertion

✔ ESP PCB/TN is suitable for telecommunication applications in accordancewith Telcordia and ANSI Standards (see Application Note AN005)

Electronic Systems Protection | PCB mount data, signal and telephone lines

ESP PCB/D and PCB/TN Series

www.furse.com

56


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

300mARATING

LOW INLINE

9.4ΩRESISTANCE

Depth=20mm (~0.8”)Weight=35gPins are centrally positionedPin 1 connects through to pin 3Pin 2 connects through to pin 4

(Underside pin view)

Features and benefits✔ Suitable for wave soldering




✔ Very low (1Ω) in-line resistance for resistance critical applications

✔ High (1.25A) maximum running current

✔ Higher bandwidth enables higher frequency data communications

✔ 2 pin clean end and 3 pin line end to ensure correct insertion

Combined Category D, C, B testedprotector (to BS EN/IEC 61643) for“through hole” mounting directlyonto the PCB of datacommunication, signal ortelephone equipment whichrequire a lower in-line resistance,an increased current or a higherbandwidth than the PCB/**DSeries. Available for workingvoltages of up to 110V for AC &DC power applications up to1.25A. For use at boundaries upto LPZ 0A to protect againstflashover (typically the serviceentrance location) through to LPZ3 to protect sensitive electronicequipment.

InstallationConnect in series, soldering pinsdirect onto PCB. Tracks to line andearth pins should be as wide aspractical (see Furse ApplicationNote AN003).

PCB mount data, signal and telephone lines | Electronic Systems Protection

ESP PCB/E Series

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57


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

1.25ARATING

LOW INLINE

1ΩRESISTANCE

HIGHBANDWIDTH

Electrical specification ESP PCB/06E ESP PCB/15E ESP PCB/30E ESP PCB/50E ESP PCB/110E

Nominal voltage1 6V 15V 30V 50V 110V

Maximum working voltage Uc2 7.79V 16.7V 36.7V 56.7V 132V

Current rating (signal) 1.25A


Bandwidth (-3dB 50Ω system) 1.5MHz 85MHz 85MHz 85MHz 85MHz1 Nominal voltage (DC or AC peak) measured at <10μA (ESP PCB/15E, ESP PCB/30E, ESP PCB/50E, ESP PCB/110E) and <200μA (ESP PCB/06E)2 Maximum working voltage (DC or AC peak) measured at <5mA leakage (ESP PCB/15E, ESP PCB/30E, ESP PCB/50E, ESP PCB/110E), <10mA (ESP PCB/06E).

Transient specification ESP PCB/06E ESP PCB/15E ESP PCB/30E ESP PCB/50E ESP PCB/110E



17.0V 39.0V 60.0V 86.0V 180V


11.5V 28.0V 49.0V 73.5V 170V


5kV, 10/700μs2 10.8V 26.2V 44.3V 65.8V 165V





– per signal wire / per pair 10kA / 20kA



Mechanical specification ESP PCB/E Series


Connection type 0.64mm (0.025”) square PCB pins, 1.2mmdiameter PCB holes recommended


Dimensions

Depth=20mm (~0.8”)Weight=35gPins are centrally positionedPin 1 connects through to pin 3Pin 2 connects through to pin 4

(Underside pin view)

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for 3 wire RTD systems to protect monitoring equipment.For use at boundaries up to LPZ 0A to protect against flashover(typically the service entrance location) through to LPZ 3 to protectsensitive electronic equipment.

Features and benefits✔ Protects all three wires on a 3-wire RTD system with a single protector




✔ Low in-line resistance minimises reductions in signal strength

✔ Supplied ready for flat mounting on base or side. Built-in DIN rail footfor simple clip-on mounting to top hat DIN rails

✔ Colour coded terminals give a quick and easy installation check

For two wire or 4-wire RTDapplications,use one or two ESP 06Dprotectors respectively. For three wireRTD applications where multiple RTDsrequire protection, use the ESP RTDQ.

ApplicationFor further information on RTDapplications, see separateApplication Note AN001 (contactFurse for a copy).

InstallationConnect in series with the signalline either near where it enters orleaves the building or close to theequipment being protectedensuring it is very close to thesystems earth star point. Screenconnection should be made viathe earth stud.

DIRTY CLEAN

Fromline

ToequipmentEarth












ESP RTD

www.furse.com

58


LPZ0A→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

LOW INLINE

10ΩRESISTANCE

CURRENT

200mARATING

Electrical specification ESP RTD

Nominal voltage1 6V

Maximum working voltage Uc2 7.79V


In-line resistance (per line ±10%) 10Ω

Bandwidth (-3dB 50Ω system) 800kHz1 Nominal voltage (DC or AC peak) measured at <200μA.2 Maximum working voltage (DC or AC peak) measured at <10mA.

Transient specification ESP RTD


C2 test 4kV 1.2/50μs, 2kA 8/20μs to BS EN/IEC 61643-21 12.0V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs to BS EN/IEC 61643-21 11.5V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 10.0V

5kV, 10/700μs2 10.5V

Maximum surge current D1 test 10/350μs to BS EN/IEC 61643-21


8/20μs to ITU (formerly CCITT), BS 6651:1999 Appendix C

– per signal wire / per pair 10kA / 20kA1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & lineto earth, both polarities. Response time <10ns.

2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21and K.45,Telcordia GR-1089-CORE, Issue 2:2002, ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).

Mechanical specification ESP RTD






Weight – unit / packaged (per 10) 0.08kg / 0.85kg

Dimensions

Electronic Systems Protection | Three wire RTD applications

Protectors for telephone linesand computer networks

ESP TN/JP, TN/RJ11 and ISDN/RJ/45 Series 60 – 61Plug-in protectors for phone lines (RJ11 or British style jack plug & socket connections) and ISDN S/T interface lines(RJ45 connections)

ESP KT and KE Series 62 – 63Single and ten way protectors for PSTN and ISDN phone lines using LSA-PLUS disconnection modules

ESP Cat-5 Series 64 – 65Computer network protector for twisted pair Ethernet (10, 100 and 1000baseT) and Power over Ethernet (PoE)networks with Cat-5 or Cat-5e cabling and RJ45 connections

ESP LA and LB Series 66 – 67Local protectors for PC’s and computer equipment with ‘D’ connectors

ESP LN Series 68 – 69Local protectors for up to Cat-5 cabling with RJ45 connectors, including multiport applications

ESP ThinNet and ThickNet Series 70Protectors for use on coaxial Thick and Thin Ethernet networks

Protectors for telephone lines and computer networks | Electronic Systems Protectionwww.furse.com

59

ELECTRONIC SYSTEMS PROTECTION

Plug-in Lightning Barrier

Wilford Road,

Nottingham,

NG2 1EB, UK

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable to protect telephony equipment plugged into a BTtelephone (BS 6312), Modem (RJ11) or ISDN (RJ45) socket. For use atboundaries up to LPZ 0B to protect against flashover (typically theservice entrance location) through to LPZ 3 to protect sensitiveelectronic equipment.





✔ Supplied in a sturdy ABS housing ready for flat mounting, or verticallyvia TS35 ‘Top Hat’ DIN rail

✔ Substantial earth connection to enable effective earthing

✔ ESP TN/JP, ESP TN/RJ11-2/6, ESP TN/RJ11-4/6 and ESP TN/RJ11-6/6 aresuitable for telecommunication applications in accordance withTelcordia and ANSI Standards (see Application Note AN005)

Application✔ For PSTN (e.g. POTS, dial-up, lease line, T1/E1, *DSL and Broadband) use

ESP TN/JP or TN/RJ11

✔ ESP TN/JP and ESP TN/RJ11… are suitable for use on telephone lineswith a maximum (or ringing) voltage of up to 296 volts

✔ For telephone lines with a British style, jack plug and socketconnection, use ESP TN/JP

✔ For telephone lines with RJ11 connections protect the middle 2 (of 6)conductors with ESP TN/RJ11-2/6, the middle 4 (of 6) withESP TN/RJ11-4/6 or all 6 with ESP TN/RJ11-6/6

✔ For S/T interface ISDN lines, use ESP ISDN/RJ45-4/8 andESP ISDN/RJ45-8/8

✔ For S/T interface ISDN lines with RJ45 connections protect the middle4 (of 8) conductors (paired 3&6, 4&5) with ESP ISDN/RJ45-4/8, or all8 (outside pairs 1&2, 7&8) with ESP ISDN/RJ45-8/8

For further information on RJ45 ISDN applications, see separate ApplicationNote AN002 and for global telephony applications, see separateApplication Note AN005 (contact Furse for a copy).

InstallationConnect in series with thetelephone or ISDN line. Theseunits are usually installed close tothe equipment being protectedand within a short distance of agood electrical earth.

Plug-in series connection for ESP TN/JP(above) and ESP TN/RJ11-2/6, 4/6 & 6/6(below) and ESP ISDN/RJ45-4/8 & 8/8

(bottom)

DIRTY CLEAN

Tophonesocket

FromequipmentEarth

An ESP TN/RJ11-4/6 protecting an externalfax line. Note the short earth connection

made to the local ring main

AccessoriesESP CAT5e/UTP-11 metre cable with RJ45connections



Wilford Road,

Nottingham,

NG2 1EB, UK

DIRTY CLEAN

Tophonesocket

FromequipmentEarth



Wilford Road,

Nottingham,

NG2 1EB, UK

DIRTY CLEAN

ToISDN line

Fromequipment

Earth

60

Electronic Systems Protection | Plug-in protectors for telephone and ISDN lines

ESP TN/JP, TN/RJ11 and ISDN/RJ45 Series

www.furse.com


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

LOW INLINE

4.4ΩRESISTANCE

CURRENT

300mARATING

For non-ISDN wire-in applications thehigh performance ESP TN or ready-boxed derivative ESP TN/BX or ESPTN/2BX can be used. Protect PBXtelephone exchanges and otherequipment with LSA-PLUS connections.

LPZ0B→3

Plug-in protectors for telephone and ISDN lines | Electronic Systems Protection

ESP TN/JP, TN/RJ11 and ISDN/RJ45 Series

www.furse.com

61

Electrical specification ESP TN/JP ESP TN/ ESP TN/ ESP TN/ ESP ISDN/ ESP ISDN/RJ11-2/6 RJ11-4/6 RJ11-6/6 RJ45-4/8 RJ45-8/8

Nominal voltage 296V 296V 296V 296V 5V 5V/58V2

Maximum working voltage Uc1 296V 296V 296V 296V 58V 58V



Bandwidth (–3dB 50Ω system) 20MHz 20MHz 20MHz 20MHz 19MHz 19MHz

1 Maximum working voltage (DC or AC peak) measured at <10μA leakage for ESP TN/JP and ESP TN/RJ11 products and 5μA for ESP ISDN/RJ45 products.2 Maximum working voltage is 5V for pairs 3/6 & 4/5, and 58V for pairs 1/2 & 7/8.

Transient specification ESP TN/JP ESP TN/ ESP TN/ ESP TN/ ESP ISDN/ ESP ISDN/RJ11-2/6 RJ11-4/6 RJ11-6/6 RJ45-4/8 RJ45-8/8


C2 test 4kV 1.2/50μs, 2kA 8/20μs toBS EN/IEC 61643-21– line to line– line to earth

395V395V

395V395V

395V395V

395V395V

28V88V

28V / 88V3

88V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs toBS EN/IEC 61643-21– line to line– line to earth

390V390V

390V390V

390V390V

390V390V

23V63V

23V / 63V3

63V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21– line to line– line to earth

295V295V

295V295V

295V295V

295V295V

26V65V

26V / 65V3

65V

5kV, 10/700μs2

– line to line– line to earth

300V300V

300V300V

300V300V

300V300V

27V80V

27V/80V3

80V


D1 test 10/350μs to BS EN/IEC 61643-21 1kA

8/20μs to ITU (formerly CCITT), BS 6651:1999Appendix C 10kA


ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).3 The first let-through voltage value is for pairs 3/4 & 5/6, and the second value is for pairs 1/2 & 7/8.4 The installation and connectors external to the protector may limit the capability of the protector.

Mechanical specification ESP TN/JP ESP TN/ ESP TN/ ESP TN/ ESP ISDN/ ESP ISDN/RJ11-2/6 RJ11-4/6 RJ11-6/6 RJ45-4/8 RJ45-8/8


Connection type Standard BT jackplug and socket

(to BS 6312)

RJ11 plugand socket

RJ11 plugand socket

RJ11 plugand socket

RJ45 plugand socket

RJ45 plugand socket

Earth connection M4/DIN rail




Dimensions

54mm

60mm

106mm

49mm

Fixing centres 49mm x 54mmM3 clearance

ESP TN/JP cablelength = 1 metre

ESP ISDN/RJ45-4/8, -8/8cable length = 0.25 metre

ESP TN/RJ11-2/6, 4/6, 6/6cable length = 1 metre

Depth=24mm

62

www.furse.com

ESP KT and KE Series

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for use on ten line LSA-PLUS disconnection modules toPBX telephone exchanges, ISDN and other telecom equipment withLSA-PLUS disconnection modules. For use at boundaries up toLPZ 0B to protect against flashover (typically the service entrancelocation) through to LPZ 3 to protect sensitive electronic equipment.

Features and benefits✔ Low cost protection for large numbers of data and signal lines




✔ Colour of housing distinguishes electrically different protectors – avoidsconfusion when installed together on the same distribution frame

✔ Quick and easy plug-in installation

✔ Under power line cross conditions /PTC versions offer safe disconnectionduring fault duration. The unit will then auto reset once the fault hasbeen corrected

✔ At larger installations ESP K10T1/2 and ESP K10T1/PTC provide all in oneprotection for all ten lines on a standard LSA-PLUS disconnectionmodules

✔ Use the ESP KE10 to provide trouble free earthing for up to tenESP KT1/2s and ESP KT1/PTC (per disconnection module)

✔ ESP K10T1/2 have an integral earth connection making the ESP KE10unnecessary

✔ ESP KT1/PTC and ESP K10T1/PTC have resettable overcurrent protectionand are rated for power cross faults

✔ ESP KT1, ESP KT1/PTC, ESP K10T1 & ESP K10T1/PTC are suitable fortelecommunication applications in accordance with Telcordia and ANSIStandards (see Application Note AN005)

Application✔ For PSTN (e.g POTS, dial-up, lease line, T1/E1, *DSL and Broadband) and

U interface ISDN lines, use ESP KT1 (or ESP KT1/PTC) and ESP K10T1 (orESP K10T1/PTC)

✔ For S/T interface ISDN lines, use ESP KT2 & ESP K10T2

✔ Protect single lines with ESP KT1, ESP KT2 or ESP KT1/PTC

✔ Protect all ten lines on a disconnection module with ESP K10T1 orESP K10T2

For further information on global telephony applications, see separateApplication Note AN005 (contact Furse for a copy).

InstallationInstall protectors on all lines thatenter or leave each building(including extensions to otherbuildings).

Identify the lines requiringprotection and plug-in theprotector (ensuring the correctorientation) for a seriesconnection. Plug ESP K10T1/2directly into each disconnectionmodule requiring protection.

ESP KT1/2 and ESP KT1/PTC mustbe installed via the ESP KE10 earthbar. Clip an ESP KE10 on to thedisconnection module and plug anESP KT1/2 or ESP KT1/PTC in toeach line on the module thatneeds protecting.

In the unlikely situation that theprotector is damaged, it willsacrifice itself and fail short circuit,taking the line out of commission– indicating it needs replacing andpreventing subsequent transientsfrom damaging equipment.

For individual telephone lines and linesat unmanned sites the highperformance ESP TN, ready-boxedderivative ESP TN/BX or ESP TN/2BX, orplug-in ESP TN/JP or ESP TN/RJ11 Seriesshould be used. For plug-in S/Tinterface ISDN protection, use the TN orISDN Series protectors.

Firmly push an ESP K10T1 (or ESP K10T2)into each disconnection module requiringprotection, so that it clips securely into the

earth point, at each end of the module

Having pushed the ESP KE10 earth bar on tothe disconnection modules’ earth points,firmly push an ESP KT1 (or ESP KT2) into

each line/pair requiring protection

Electronic Systems Protection | Telephone lines with LSA-PLUS modules


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

LOW INLINE

4.4ΩRESISTANCE

HIGHBANDWIDTH

LPZ0B→3

Electrical specification ESP KT1 ESP KT1/PTC ESP KT2 ESP K10T1 ESP K10T1/PTC ESP K10T2

Maximum working voltage Uc1

– line to line 296V 296V 58V 296V 296V 58V

– line to earth 296V 296V 5V 296V 296V 5V

Current rating (signal) 300mA 145mA 300mA 300mA 145mA 300mA


Bandwidth (–3dB 50Ω system) >20MHz >40MHz >19MHz >20MHz >40MHz >19MHz

1 Maximum working voltage (DC or AC peak) at 10μA for ESP KT1, ESP KT1/PTC, ESP K10T1, ESP K10T1/PTC and at 5μA for ESP KT2 and ESP K10T2.

Transient specification ESP KT1 ESP KT1/PTC ESP KT2 ESP K10T1 ESP K10T1/PTC ESP K10T2


C2 test 4kV 1.2/50μs, 2kA 8/20μs toBS EN/IEC 61643-21– line to line– line to earth

395V395V

395V395V

28V88V

395V395V

395V395V

28V88V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs toBS EN/IEC 61643-21– line to line– line to earth

390V390V

390V390V

23V63V

390V390V

390V390V

23V63V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21– line to line– line to earth

295V295V

295V295V

26V65V

295V295V

295V295V

26V65V

5kV, 10/700μs2

– line to line– line to earth

300V300V

300V300V

27V80V

300V300V

300V300V

27V80V


D1 test 10/350μs to BS EN/IEC 61643-21– line to line– line to earth

1kA2kA

8/20μs to ITU (formerly CCITT), BS 6651:1999Appendix C– line to line– line to earth

5kA10kA


ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).3 The installation and connections external to the protector may limit the capability of the protector.

Power faults specification ESP KT1 ESP KT1/PTC ESP KT2 ESP K10T1 ESP K10T1/PTC ESP K10T2

Power/Line Cross and Power Induction - tests to: ITU-T (formerly CCITT) K.20, K.21 and K.45, Telcordia GR-1089-CORE, Issue 2:2002, UL 60950/IEC 950

– power/line cross – 110/230Vac(15min)

– – 110/230Vac(15min)

–

– power induction – 600V, 1A (0.2sec) – – 600V, 1A (0.2sec) –

Mechanical specification ESP KT1, ESP KT2, ESP K10T1, ESP K10T2, ESP KE10ESP KT1/PTC ESP K10T1/PTC

Temperature range -25 to +70ºC –

Connection type To LSA-PLUS disconnection modules (BT part number 237A) –

Earth connection Via ESP KE10 earth bar Via integral earth clip –

Material ABS UL94 V-0 Stainless Steel

Weight – unit 0.01kg 0.10kg 0.01kg

Weight – packaged 0.12kg (per 10) 0.12kg 0.10kg (per 10)

Dimensions

63

www.furse.com

ESP KT and KE Series

Telephone lines with LSA-PLUS modules | Electronic Systems Protection

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable to protect twisted pair Ethernet networks, includingPower over Ethernet (PoE), with RJ45 connections. For use atboundaries up to LPZ 0B to protect against flashover (typically theservice entrance location) through to LPZ 3 to protect sensitiveelectronic equipment.

Features and benefits✔ Suitable for systems signalling on up to eight wires of either shielded

or unshielded twisted pair cable




✔ Unlike some competing devices, the ESP Cat-5 Series provides effectiveprotection without impairing the system’s normal operation

✔ Low capacitance circuitry prevents the start-up signal degradationassociated with other types of network protector

✔ Low in-line resistance minimises unnecessary reductions in signalstrength to maximise signalling distance

✔ Sturdy ABS housing with convenient holes for flat mounting, orvertically via TS35 ‘Top Hat’ DIN rail

✔ Substantial earth connection to enable effective earthing

✔ Supplied with short (25cm) Cat-5e UTP cable to enable neat installation

✔ Cat-5/PoE includes resettable overcurrent protection

ApplicationUse these protectors on network cables that travel between buildings toprevent damage to equipment, e.g. computers, servers, repeaters and hubs.Suitable for computer networks up to Cat-5e cabling.

✔ To protect up to 100baseT and up to 1000baseT networks with Cat-5cabling use ESP Cat-5 and ESP Cat-5/Gigabit respectively

✔ To protect up to 100baseT and up to 1000baseT networks with Cat-5ecabling use ESP Cat-5e and ESP Cat-5e/Gigabit respectively

✔ To protect up to 100baseT Power over Ethernet (PoE) networks useESP Cat-5/PoE

For further application information, see separate Application Note AN004(contact Furse for a copy).

InstallationConnect in series with thenetwork cable, either:

a) near to where it enters orleaves the building, or

b) as it enters the network hub,or

c) close to the equipment beingprotected.

This should be close to thesystem’s earth star point (toenable a good connection toearth).

To protect coaxial Ethernet networks, use the ESP ThinNet or ESP ThickNet. To protectdatacomms systems based on twisted pairs, use the D, E or H Series. Local protection fornetworked equipment is also available.

Technical noteThe interfaces used in 10,100 and 1000baseT Ethernetand PoE networks incorporatean isolation transformer whichgives these systems an inbuiltimmunity to transientsbetween line and earth of1,500 volts or more

A Furse ESP Cat-5e/Gigabit (left and detailbelow) protecting a hub from transient

overvoltages on a network connection withanother building

AccessoriesESP CAT5e/UTP-11 metre cable with RJ45connections



Wilford Road,

Nottingham,

NG2 1EB, UK

Plug-in series connection

DIRTY CLEAN

Fromline

ToequipmentEarth

Electronic Systems Protection | Computer networks up to Cat-5e and PoE

ESP Cat-5 Series

www.furse.com

64


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

CURRENT

300mARATING

LOW INLINE

1ΩRESISTANCE

LPZ0B→3

Computer networks up to Cat-5e and PoE | Electronic Systems Protection

ESP Cat-5 Series

www.furse.com

65

Electrical specification ESP Cat-5 ESP Cat-5e ESP Cat-5/Gigabit ESP Cat-5e/Gigabit ESP Cat-5/PoE

Maximum working voltage Uc1

– data2 5V 5V 5V 5V 5V

– power3 – – – – 58V

Current rating 300mA 300mA 300mA 300mA 350mA

In-line resistance (per line ±10%)– data2 1Ω 1Ω 1Ω 1Ω 4.4Ω

– power3 – – – – 4.4Ω

Maximum data rate 100Mbps 100Mbps 1000Mbps 1000Mbps 100Mbps

Networking standards 10/100baseTTIA Cat-5

IEEE 802.3iIEEE 802.3u

10/100baseTTIA Cat-5eIEEE 802.3iIEEE 802.3u

10/100/1000baseTTIA Cat-5

IEEE 802.3iIEEE 802.3uIEEE 802.3ab

10/100/1000baseTTIA Cat-5eIEEE 802.3iIEEE 802.3uIEEE 802.3ab

10/100baseTTIA Cat-5/PoE

IEEE 802.3iIEEE 802.3uIEEE802.3af

1 Maximum working voltage (DC or AC peak) measured at 1mA leakage.2 Data pairs 1/2 and 3/6 are protected as standard. Pairs 4/5 and 7/8 are also protected on the ESP Cat-5/Gigabit and ESP Cat-5e/Gigabit barriers.3 Power pairs 4/5 and 7/8.

Transient specification ESP Cat-5 ESP Cat-5e ESP Cat-5/Gigabit ESP Cat-5e/Gigabit ESP Cat-5/PoE


C2 test 4kV 1.2/50μs, 2kA 8/20μs toBS EN/IEC 61643-21– line to line– line to earth2

120V700V

120V700V

120V700V

120V700V

120V/88V5

700V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs toBS EN/IEC 61643-21– line to line– line to earth2

74V600V

74V600V

74V600V

74V600V

74V/63V5

600V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21– line to line– line to earth2

21V550V

21V550V

21V550V

21V550V

21V/65V5

550V

5kV, 10/700μs– line to line– line to earth3

25V600V

25V600V

25V600V

25V600V

25V/80V5

600V




10kA

1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & line to earth, both polarities. Response time <10ns.2 The interfaces used in Cat-5/5e systems incorporate an isolation transformer that inherently provides an inbuilt immunity to transients between line and earth of

1,500 volts or more.3 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002,

ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).4 The installation and connections external to the protector may limit the capability of the protector.5 The first number is for the data pair, with the second number for the power pair

Mechanical specification ESP Cat-5, ESP Cat-5e, ESP Cat-5/Gigabit, ESP Cat-5e/Gigabit, ESP Cat-5/PoE

Temperature range –25ºC to +70ºC

Connection type RJ45 sockets, 25cm patch lead included

Cable 0.25m plug-plug Cat-5e UTP patch lead

Earth connection M4/DIN rail




Dimensions

54mm

60mm

106mm

49mm

Fixing centres 49mm x 54mmM3 clearance

Depth=24mm

Combined Category C, B tested protector (to BS EN/IEC 61643)suitable to protect PCs and other computer equipment on systemsusing 9, 15 or 25 pins. For use on lines running within buildings atboundaries up to LPZ 2 through to LPZ 3 to protect sensitiveelectronic equipment.

Features and benefits✔ Let-through voltage below equipment susceptibility levels

✔ Negligible in-line resistance

✔ Suitable for equipment using “D” connectors – DB-9, DB-15 and DB-25

✔ ESP LA-5/25 protects pins 1, 2, 3, 7 & 20 to earth/shell. Note pin 1 isconnected to earth

✔ ESP LA-25/25 and ESP LB-25/25 protects all pins. Note pin 1 is connectedto earth/shell

✔ ESP LA-9/9, ESP LB-9/9, ESP LA-15/15 and ESP LB-15/15 protect all pins

✔ Sturdy plastic housing

✔ Male/female connectors allow easy plug-in installation without rewiring

✔ Earthed via shell and supplementary earth strap

ApplicationUse on cables running within a building to protect equipment locally fromtransients induced onto data cables from the magnetic field caused by alightning strike.

✔ For Asynchronous RS 232 systems, use ESP LA-5/25

✔ For RS 232 systems, use ESP LA-25/25, ESP LA-9/9 or ESP LA-15/15

✔ For RS 422, RS 423 and RS 485 systems, use ESP LB-9/9, ESP LB-15/15 orESP LB-25/25

InstallationSimple plug-in connection to thecommunication port, between theequipment to be protected and itsincoming data cable. Makesuitable attachment to earth.

ESP LA-5/25 installed on the parallel portof a PC, protecting the printer connection

For coaxial Ethernet cables running external to the building, use the ESP ThinNet or ESP ThickNet. For cabling up to Cat-5e with RJ45 connections(running external to the building) and local protection for up to Cat-5 with RJ45 connections, (running within a building) products are alsoavailable. Contact Furse.

Electronic Systems Protection | Local protection for computer communications

ESP LA and LB Series

www.furse.com

66


LPZ2→3

eENHANCED


SIGNAL/TELECOM

TEST CATC + B

LOW INLINE

~0ΩRESISTANCE

CURRENT

300mARATING

Technical noteESP LA… and ESP LB…protectors are designed onlyfor use on cables runningwithin a building (typically LPZ2) to offer local protection toequipment. They therefore willnot be able to handle thehigher level transients thatoccur when lines betweenbuildings are protected. ESPLA... and ESP LB... protectorsshould not be used in such anapplication (up to LPZ 0A)where high energy ESPlightning barriers (such as ESP ESeries) should be employed. Ifthey are used in lines betweenbuildings, there is a high risk ofthe protector being overloadedand destroyed during transientactivity. Connected equipmentwill, in most cases, still beprotected, but there is a smallrisk that equipment will sufferdamage in such circumstances.

Local protection for computer communications | Electronic Systems Protection

ESP LA and LB Series

www.furse.com

67

Electrical specification ESP LA-5/25 ESP LA-25/25 ESP LA-9/9 ESP LB-9/9 ESP LA-15/15 ESP LB-15/15 ESP LB-25/25

Nominal voltage1 23.1V 23.1V 23.1V 5.8V 15.3V 6.4V 5.8V

Maximum working voltage Uc2 25.7V 25.7V 25.7V 6.4V 17.1V 7.13V 6.4V

Capacitance <500pF <500pF <500pF <2000pF <50pF <50pF <2000pF

Current rating 300mA

In-line resistance ~0Ω1 Nominal voltage (DC or AC peak) measured at 5μA (ESP LA-5/25, ESP LA-9/9, ESP LA-25/25, ESP LA-15/15), 0.5mA (ESP LB-15/15) and 1mA (ESP LB-9/9,

ESP LB-25/25).2 Maximum working voltage (DC or AC peak) measured at 1mA leakage (ESP LA-5/25, ESP LA-9/9, ESP LA-25/25, ESP LA-15/15) and 10mA (ESP LB-15/15,

ESP LB-9/9 and ESP LB-25/25).

Transient specification ESP LA-5/25 ESP LA-25/25 ESP LA-9/9 ESP LB-9/9 ESP LA-15/15 ESP LB-15/15 ESP LB-25/25

Let-through voltage1 Up

C1 test 0.5kV 1.2/50μs, 0.25kA 8/020μs toBS EN/IEC 61643-21

– – – 12.5V 31.5V 16.0V 12.5V

B2 test 1kV 10/700μs to BS EN/IEC 61643-21 36.5V 36.5V 36.5V 10.0V 27.5V 14.0V 10.0V

1.5kV, 10/700μs2 37.5V 37.5V 37.5V 10.5V 28.5V 14.6V 10.5V

Protection provided Pins 1, 2, 3, 7and 20 toearth/shell3

Pins 1 – 25 toearth/shell3

Pins 1 – 9 toearth/shell

Pins 1 – 9 toearth/shell

Pins 1 – 15 toearth and each

other

Pins 1 – 15 toearth and each

other

Pins 1 – 25 toearth/shell3



200A 200A 200A 300A 350A 700A 300A

1 The maximum transient voltage let-through the protector throughout the test (±10%). Response time <10ns.2 Test to BS 6651:1999 Appendix C, Cat C-Low, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002, ANSI

TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).3 Pin 1 connected to earth/shell.

Mechanical specification ESP LA-5/25 ESP LA-25/25 ESP LA-9/9 ESP LB-9/9 ESP LA-15/15 ESP LB-15/15 ESP LB-25/25


Connection type DB-25 m-f DB-25 m-f DB-9 m-f DB-9 m-f DB-15 m-f DB-15 m-f DB-25 m-f

Earth connection Shell or 150mm earth lead (supplied)

Casing material ABS UL94 V-0

Weight – unit 50g 50g 40g 40g 50g 50g 50g

Weight – packaged 70g 70g 50g 50g 60g 60g 70g

Dimensions

Depth (all units)=18mm

ESP LA-9/9ESP LB-9/9

ESP LA-15/15ESP LB-15/15

ESP LA-5/25EPS LA-25/25EPS LB-25/25

Combined Category C, B tested protector (to BS EN/IEC 61643)suitable to protect equipment on twisted pair applications usingCat-5 wiring with RJ45 connectors. For use on lines running withinbuildings at boundaries up to LPZ 2 through to LPZ 3 to protectsensitive electronic equipment.

Features and benefits✔ Suitable for systems signalling on up to 8 wires of unshielded twisted

pair cable – protects all 8 pins in each line

✔ Use to protect 1, 4, 8 or 16 lines

✔ Suitable for RS 422/423, 10baseT, 100baseT, Token Ring and FastEthernet systems

✔ Available for individual connections or for multiport applications

✔ Free standing or 19” rack mounted versions available for multiportapplications

✔ Let-through voltage below equipment susceptibility levels

✔ Protects twisted pair lines operating at speeds up to 100Mbps

✔ Available as 4 or 8 port free standing versions (ESP LN-4 and ESP LN-8)and 8 or 16 port 19” rack mounted panels (ESP LN-8/16 andESP LN-16/16)

✔ Negligible in-line resistance

✔ Sturdy housing and simple plug in installation

✔ Simple earthing via single braided metal strap

ApplicationUse on network cables running within a building to protect systems locallyfrom transients induced onto data cables from the magnetic field caused bya lightning strike. Suitable for internal cabling Cat-5.

✔ Protect the network connection to individual pieces of equipment withthe ESP LN

✔ Protect multiport applications such as hubs, switches and patch panelswith the ESP LN-4, ESP LN-8, ESP LN-8/16 or ESP LN-16/16

InstallationPlug in connection betweenincoming data cables andequipment to be protected. Makesuitable attachment to earth.

ESP LN installed on the network connectionto a PC. Note the black earth leadconnection to the chassis of the PC

For coaxial Ethernet cables running external to the building, use the ESP ThinNet and ESP ThickNet. Protectors for up to Cat-5e cabling withRJ45 connections running external to the building and local protection for PCs and computer communications with D connectors (cables runningwithin a building), are also available. Contact Furse.

Electronic Systems Protection | Local protectors for internal cabling up to Cat-5

ESP LN Series

www.furse.com

68


eENHANCED


SIGNAL/TELECOM

TEST CATC + B

LOW INLINE

~0ΩRESISTANCE

CURRENT

300mARATING

LPZ2→3

Technical noteESP LN… range of protectorsare designed only for use oncables running within abuilding (typically LPZ 2) tooffer local protection toequipment. They therefore willnot be able to handle thehigher level transients thatoccur when lines betweenbuildings are protected. ESPLN... range of protectors shouldnot be used in such anapplication (up to LPZ 0A)where high energy ESPlightning barriers (such as ESP Eand ESP Cat-5 Series) should beemployed. If they are used inlines between buildings, thereis a high risk of the protectorbeing overloaded anddestroyed during transientactivity. Connected equipmentwill, in most cases, still beprotected, but there is a smallrisk that equipment will sufferdamage in such circumstances.

Electrical specification ESP LN ESP LN-4 ESP LN-8 ESP LN-8/16 ESP LN-16/16

Maximum working voltage Uc1 4V


In-line resistance ~0Ω

Data rate (TIA Cat-5) 100Mbps

1 Maximum working voltage (DC or AC peak) measured at 1mA leakage.

Transient specification ESP LN ESP LN-4 ESP LN-8 ESP LN-8/16 ESP LN-16/16

Let-through voltage1 Up

C1 test 0.5kV, 1.2/50μs, 0.25kA 8/20μs toBS EN/IEC 61643-21

13.5V


1.5kV, 10/700μs2 12.5V



350A

1 The maximum transient voltage let-through the protector throughout the test (±10%). Response time <10ns.2 Test to BS 6651:1999 Appendix C, Cat C-Low, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002,


Mechanical specification ESP LN ESP LN-4 ESP LN-8 ESP LN-8/16 ESP LN-16/16


Connection type RJ45 sockets

Earth connection External earthStrap

External earthstrap on frontfascia panel

External earthstrap on frontfascia panel

External earthstrap through

mounting screws

External earthstrap through

mounting screws

Casing material ABS UL94 V-0 ABS UL94 V-0 ABS UL94 V-0 Steel Steel

Weight – unit 0.05kg 0.29kg 0.32kg 0.75kg 1kg

Weight – packaged 0.09kg 0.58kg 0.61kg 1.1kg 1.35kg

Dimensions

ESP LN

Depth=21mm

ESP LN-8/16ESP LN-16/16

Depth=67mm

ESP LN-4ESP LN-8

Depth=41mm

(ESP LN supplied with 120mmCat-5 UTP cable)

Local protectors for internal cabling up to Cat-5 | Electronic Systems Protection

ESP LN Series

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69

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for use on Thick & Thin Ethernet cables that travel betweenbuildings to prevent damage to equipment, e.g. transceivers, servers& repeaters. For use at boundaries up to LPZ 0B to protect againstflashover (typically the service entrance location) through to LPZ 3to protect sensitive electronic equipment.



✔ Very low reflection coefficient/VSWR

✔ High bandwidth prevents degradation of high frequency signals

✔ Low in-line resistance to minimise unnecessary reductions in signalstrength and maximise signalling distance

ApplicationFor Thin Ethernet (Cheapernet,IEEE 802.3, 10 base 2) systems, useESP ThinNet (BNC connectors).For Thick Ethernet (IEEE 802.3,10 base 5) systems, use ESPThickNet (N connectors).

InstallationConnect in-line with the Ethernetcable near to where it enters andleaves the building or close to theequipment being protected.Ideally, close to the system’s earthstar point (for a good connectionto earth).

Note: allowing for one protectorat each end, ESP ThinNet can beinstalled on segment lengths of upto 148 metres and ESP ThickNetcan be used on segment lengthsof up to 400 metres.

DIRTY CLEAN

Fromline

Toequipment

Earth

AccessoriesUse CME 4 or CME 8 to mount andearth up to 2 or 4 protectors,respectively. Enclosures are available(see WBX Series).

Technical noteAs a result of an isolationtransformer in their transceivers,thin and thick Ethernet systemshave an inbuilt immunity level(of around 400 volts) totransients between signalor screen and earth

Series connection of ESP ThinNet

To protect twisted pair Ethernet (10 or100baseT) networks with RJ45 connectionsuse ESP Cat-5. Local protection fornetworked equipment is also available.

Electronic Systems Protection | Coaxial Ethernet systems

ESP ThinNet and ThickNet Series

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70


LPZ0B→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

LOW INLINE

0.5ΩRESISTANCE

CURRENT

300mARATING

Electrical specification ESP ThinNet ESP ThickNet

Nominal voltage –2.05V peak

Maximum working voltage Uc –4.5V peak


In-line resistance (per line ±10%) 0.5Ω inserted in coax inner

Bandwidth (–3dB 50Ω system) <0.1dB at 10MHz(<0.3dB at 50MHz)

Voltage standing wave ratio ≤1.08

Networking standards 10base2, IEEE 802.3a 10base5, IEEE 802.3

Transient specification ESP ThinNet ESP ThickNet


C2 test 4kV 1.2/50μs, 2kA 8/20μs to BS EN/IEC 61643-21– signal to screen / signal/screen to earth2 35.0V / 375V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs to BS EN/IEC 61643-21– signal to screen / signal/screen to earth2 25.0V / 310V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21– signal to screen / signal/screen to earth2 15.0V / 295V

5kV, 10/700μs3

– signal to screen / signal/screen to earth2 20V / 325V



8/20μs to ITU (formerly CCITT), BS 6651:1999 Appendix C 10kA

Mechanical specification ESP ThinNet ESP ThickNet


Connection type Coaxial BNC female Coaxial N female


Casing material Steel

Weight – unit / packaged 0.2kg / 0.23kg 0.24kg / 0.27kg

Dimensions

1 The maximum transient voltage let-through theprotector throughout the test (±10%), signal toscreen & signal/screen to earth, both polarities.Response time <10ns

2 See boxed ‘Ethernet technical note’.3 Test to BS 6651:1999 Appendix C, Cat C-High,IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20,K.21 and K.45,Telcordia GR-1089-CORE, Issue2:2002, ANSI TIA/EIA/IS-968-A:2002 (formerlyFCC Part 68).

4 The installation and connections external to theprotector may limit the capability of the protector.

Protectors for RF systems,CCTV video, rail and CATV

ESP RF Series 72 – 73Protectors for RF systems using coaxial cables at frequencies between DC and 2.7GHz

Higher Specification ESP RF Series 74 – 75Higher specification protectors for RF systems using coaxial cables at frequencies between 50MHz and 2.7GHz

ESP CCTV Series 76 – 77Protectors for Closed Circuit TV video lines

ESP SSI Series 78 – 79Protectors for signal and power lines used in Solid State Interlocking (SSI) systems

ESP TV Series 80Protectors for coaxial TV systems

Protectors for RF systems, CCTV video, rail and CATV | Electronic Systems Protectionwww.furse.com

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72

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ESP RF Series

Electronic Systems Protection | Coaxial RF systems

ESP RF 111121 on a coaxial cable runningbetween an antenna and an RF receiver

ApplicationThe Standard RF protector offers acost effective protection solutionfor use on coaxial cables to protectRF transmitter and receiversystems, including electronicslocated at the antenna or dish.Typical examples include cell sites,military communications, satelliteearth stations and pager systems.They can be used in applicationswhere DC power is required topass to the equipment.

InstallationIn a building, connect in serieswith the coaxial cable near whereit enters or leaves the structure, orclose to the equipment beingprotected. On a mast, connect inseries with the coaxial cable nearthe antenna/dish being protected.Install in a radio communicationsroom, an existing cabinet or asuitable enclosure.

AccessoriesESP RF BK1Straight mounting plates

ESP RF BK290° angled mounting plates

ESP RF GDT-xReplacement gas discharge tubes(Where x is the correct GDT partcode digit for your system.See GDT selection, above.)

ESP RF 111A21 with N female connectorsinstalled in series

DIRTY CLEAN

From line Toequipment

Earth


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

HIGHBANDWIDTH

Technical noteThese protectors are based on acontinuous transmission linewith a GDT connected betweenthis line and screen/earth, andare suited for applicationswhere DC is required to pass tothe equipment.

LPZ0A→2

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for RF systems using coaxial cables at frequencies betweenDC and 2.7GHz and where DC power is present. Suitable for RFsystems with power up to 2.3kW. For use at boundaries up toLPZ 0A to protect against flashover (typically the service entrancelocation) through to LPZ 3 to protect sensitive electronic equipment.

Features and benefits✔ Restricts let-through voltage below damage levels of interface circuitry

✔ Very low attenuation and near unity VSWR over a wide range offrequencies ensure the protectors do not impair system performance

✔ Wide bandwidth means a single product is suitable for a range ofapplications, including the transmission of DC power

✔ Easily mounted and earthed via fixtures on the base of the unit

✔ Available with N, 7/16 DIN and BNC connectors

✔ Additional mounting plates give increased flexibility

✔ Robust silver plated aluminium housing

Part numbering systemFurse RF protectors have six digit part codes, prefixed with ESP RF. The selecteddigits define the exact specification of the required protector, e.g. ESP RF AABCDEConnector type – ESP RF AAxxxxThe first 2 digits refer to the connector type:

11 – N type female connectorsAA – 7/16 DIN type female connectors44 – BNC female connectors

Line impedance – ESP RF xxBxxx3rd digit refers to the line impedance. Currently only one option:

1 – 50Ω transmission line.Gas Discharge Tube (GDT) selection – ESP RF xxxCxxSelect the 4th digit from the table at the bottom of page 73.Selection of the correct GDT is critical in the effectiveness of using these protectors.For the correct GDT, take the maximum RF power or voltage of the system andselect a GDT with a voltage/power handling greater than the system.Important note: When using the peak RF voltage to select the GDT, if the systemis a multi-carrier system the (in phase) peak RF voltage can be calculated as thetotal of all the single carrier peak voltages on the transmission line.Protector rating – ESP RF xxxxDx5th digit specifies the protector rating.

1 – Higher specification (see pages 74 – 75)2 – Standard specification (see pages 72 – 73)

Case plating – ESP RF xxxxxE6th digit specifies the case plating. Currently only one option.

1 – Silver

For RF applications where the connected equipment is very sensitive to transientovervoltages, use the higher specification RF protectors. ESP CCTV/B and ESP CCTV/T aresuitable for use on coaxial (or twisted pair) CCTV lines. For coaxial CATV lines, use the CATV/F.

73

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ESP RF Series

Coaxial RF systems | Electronic Systems Protection

Gas Discharge Tube selectionMax RF voltage Max RF power GDT voltage GDT part

VPeak VRMS -50Ω system (PRMS) code digit

72V 51V 50W 90V 1

120V 85V 145W 150V 2

185V 130V 340W 230V 3

280V 200V 785W 350V 4

375V 265V 1.4kW 470V 5

480V 340V 2.3kW 600V 6

Electrical specification ESP RF xx1x21

Gas Discharge Tube voltage 90V 150V 230V 350V 470V 600V

Maximum working voltage Uc (RMS)1 51V 85V 130V 200V 265V 340V

Characteristic impedance 50Ω

Bandwidth DC – 2.7GHz


Insertion loss over bandwidth ≤0.1dB

Maximum power1 50W 145W 340W 785W 1.4kW 2.3kW

1 The maximum RF working voltage and maximum power for the protectors is dependent on the GDT selected. See ‘Gas Discharge Tube selection’ below.

Transient specification ESP RF xx1x21

Gas Discharge Tube voltage 90V 150V 230V 350V 470V 600V



<700V <650V <700V <800V <900V <1050V


<550V <450V <550V <650V <800V <950V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 <400V <350V <450V <550V <730V <800V

5kV, 10/700μs2 <430V <370V <470V <580V <750V <830V


D1 test 10/350μs to BS EN/IEC 61643-21 2.5kA


20kA

1 The maximum transient voltage let-through the protector throughout the test (±10%). Response time <10ns. This let-through voltage represents a deviation fromthe applied signal voltage, present at the time of the test.

2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,Telcordia GR-1089-CORE, Issue 2:2002,ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).

3 The installation and connections external to the protector may limit the capability of the protector

Mechanical specification ESP RF 111x21 ESP RF AA1x21 ESP RF 441x21


Connection type N female 7⁄16 DIN female BNC female

Earth connection Via mounting fixtures

Case material Aluminium, Silver plated

Weight – unit 120g 190g 90g

Weight – packaged 140g 210g 110g

DimensionsESP RF BK1Straight mounting bracket, 53 x 26.3 x 3mmTwo M4 clearance mounting holes, 16.3mmapartESP RF BK290° mounting bracket, 33 x 26.3 x 3mm, 20 x26.3 x 3mmTwo M4 clearance mounting holes, 16.3mmapart, 14mm from fold line(Mounting brackets supplied with screws forfixing to protector)

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for RF systems (of power up to 150W) using coaxial cablesat frequencies between 50MHz and 2.7GHz to provide effectiveprotection without impairing system performance. For use atboundaries up to LPZ 0B to protect against flashover (typically theservice entrance location) through to LPZ 3 to protect sensitiveelectronic equipment.





✔ Superior transient protection to both Gas Discharge Tube (GDT) andQuarter Wave Stub (QWS) based protectors

✔ Very low attenuation and near unity VSWR over a wide range offrequencies ensure the protectors do not impair system performance

✔ Wide bandwidth means a single product is suitable for a rangeof applications

✔ Available with N, 7/16 DIN and BNC connectors

✔ Easily mounted and earthed via fixtures on the base of the unit thataccept M3 and M5 screws or via mounting brackets

✔ Additional mounting plates give increased flexibility

✔ Robust silver plated aluminium housing

ApplicationUse on coaxial cables to protect RFtransmitter and receiver systems,including electronics located atthe antenna or dish. Typicalexamples include cell sites, militarycommunications, satellite earthstations, pager systems andemergency servicescommunications systems.

InstallationIn a building, connect in serieswith the coaxial cable near whereit enters or leaves the structure, orclose to the equipment beingprotected. This should be as closeas possible to the system’s earthstar point (to enable a goodconnection to earth). On a mast,connect in series with the coaxialcable near the antenna/dish beingprotected.

Install in a radio communicationsroom, an existing cabinet or asuitable enclosure.

ESP RF 111A11 with N female connectorsinstalled in series

DIRTY CLEAN

From line Toequipment

Earth

ESP RF AA1A11 with 7/16 DIN femaleconnectors installed in series

DIRTY CLEAN

ToequipmentEarth

ESP RF 111A11 installed on acoaxial cable runningbetween an antenna and anRF receiver. Note the earthlead (behind the cable tray)attached to the mountingfixture

From line

AccessoriesESP RF BK1Straight mounting plates

ESP RF BK290° angled mounting plates

ESP RF GDT-AReplacement gas discharge tube

ESP RF 441A11 with BNC female connectorsinstalled in series

DIRTY CLEAN

From line ToequipmentEarth

Electronic Systems Protection | Coaxial RF systems

ESP RF Series

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74


LPZ0B→3

eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

HIGHBANDWIDTH

Technical noteThe high level of protection offered by these units comes from the additionof a high pass filter circuit which gives a very low let-through voltage. Itshould be noted that due to this high pass filter circuit no DC power canpass along the transmission line. This is referred to as “DC blocked”.

Protectors with other connectors are available. Contact Furse.

Electrical specification ESP RF 111A11 ESP RF AA1A11 ESP RF 441A11

Maximum working voltage Uc (RMS) 86V

Maximum transmitted power (RMS) 150W


Bandwidth 50 – 2700MHz


Insertion loss over bandwidth – 50-500MHz ≤0.4dB

Insertion loss over bandwidth – 500-1,600MHz ≤0.2dB

Insertion loss over bandwidth – 1.6-2.7GHz ≤0.4dB

Maximum power 150W

Transient specification ESP RF 111A11 ESP RF AA1A11 ESP RF 441A11



24V


15V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 15V

5kV, 10/700μs2 20V




10kA

1 The maximum transient voltage let-through the protector throughout the test (±10%). Response time <10ns. This let-through voltage represents a deviation fromthe applied signal voltage, present at the time of the test.


3 The installation and connectors external to the protector may limit the capability of the protector.

Mechanical specification ESP RF 111A11 ESP RF AA1A11 ESP RF 441A11


Connection type N female 7⁄16 DIN female BNC female

Earth connection Via mounting fixtures

Case material, finish Aluminium, Silver plated

Weight – unit 150g 220g 120g

Weight – packaged 170g 240g 160g

Dimensions

Coaxial RF systems | Electronic Systems Protection

ESP RF Series

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75

ESP RF BK1Straight mounting bracket, 53 x 26.3 x 3mmTwo M4 clearance mounting holes, 16.3mm apartESP RF BK290° mounting bracket, 33 x 26.3 x 3mm,20 x 26.3 x 3mmTwo M4 clearance mounting holes, 16.3mm apart, 14mm fromfold line

(Mounting brackets supplied with screws for fixing to protector)

For RF applications where DC power is presenton the coaxial cable, use the alternative RFprotectors. The ESP CCTV/B and ESP CCTV/T aresuitable for use on coaxial (or twisted pair)CCTV lines. For coaxial CATV lines, use theESP CATV/F.

Combined Category D, C, B tested protector (to BS EN/IEC 61643)suitable for coaxial CCTV cables with BNC connectors (ESP CCTV/B)or twisted pair CCTV lines (ESP CCTV/T) on systems with either anearthed or an isolated screen. Not suitable for use on broadcast,satellite or cable TV systems. For use at boundaries up to LPZ 0A toprotect against flashover (typically the service entrance location)through to LPZ 3 to protect sensitive electronic equipment.





✔ 100MHz bandwidth prevents the degradation of high frequency signals

✔ Low in-line resistance to minimise unnecessary reductions in signalstrength and maximise signalling distance

✔ Very low reflection coefficient/VSWR ensure that the protector doesn’tdisrupt system operations

✔ Suitable for either earthed or isolated screen systems

✔ Sturdy, conductive ABS housing for 2 way shielding – preventingemissions & providing signals with immunity from external interference

✔ Convenient holes for flat mounting on base or side

✔ Built-in DIN rail foot for easy installation on top hat DIN rail

✔ ESP CCTV/T has colour coded terminals for a quick and easy installationcheck – grey for the dirty (line) end and green for the clean end


✔ Integral earthing plate for enhanced connection to earth via CME kit

✔ ESP CCTV/B has Network Rail Approval PA05/02510.NRS PADS reference 086/023410

ApplicationUse these protectors on the videocable to outdoor CCTV camerasand central control andmonitoring equipment.

InstallationConnect in series with the CCTVcable in a convenient place closeto the equipment beingprotected. For outdoor CCTVcameras, protectors should bemounted in the junction box, or ina separate enclosure, close to thecamera. Protect central controland monitoring equipment insidethe building by installingprotectors on all incoming oroutgoing lines, either:

a) near where they enter orleave the building, or

b) close to the equipment beingprotected (or actually withinits control panel).

Series connection for ESP CCTV/B

DIRTY CLEAN

From line To equipment

Earth

Series connection for ESP CCTV/T

DIRTY CLEAN

From line To equipmentEarth

AccessoriesWhen CCTV protectors areinstalled in groups, or alongsideprotectors for signal and mainspower lines, these can besimultaneously mounted andearthed on a CME kit. A CME 4will accommodate the video,telemetry and power protectors toa camera. If protectors cannot beincorporated within an existingpanel or enclosure, WBXenclosures are available for upto 4, 8, 16 or 32 protectors andtheir associated CME kit. TheWBX 4/GS is a secure IP66enclosure suitable for a CME 4and associated protectors.

Protectors for the video (ESP CCTV/B, left), cameratelemetry (ESP 06E, centre) and the low current mains power(ESP 240-5A, right) inputs to a camera, installed together on aCME 4 mounting and earthing kit. Note that the protectors havebeen cross bonded to the metalwork of the pole (out of shot)

Electronic Systems Protection | Closed Circuit TV video lines

ESP CCTV Series

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76


eENHANCED


SIGNAL/TELECOM

TEST CATD + C + B

LOW INLINE

1ΩRESISTANCE

CURRENT

300mARATING

HIGHBANDWIDTH

LPZ0A→3

Electrical specification ESP CCTV/B ESP CCTV/T

Nominal voltage1 (peak – peak) 1V 2V

Maximum working voltage Uc2 (peak) 6.45V


In-line resistance (±10%) 1Ω inserted in coax inner 1Ω per line

Bandwidth (-3dB 75W system)3 >100MHz

Voltage standing wave ratio <1.2

1 Nominal voltage (DC or AC peak) measured at <1μA leakage.2 Maximum working voltage (DC or AC peak) measured at 10mA leakage. Other voltages available – contact Furse for details.3 Capacitance <30pF.

Transient specification ESP CCTV/B ESP CCTV/T


C2 test 4kV 1.2/50μs, 2kA 8/20μs to BS EN/IEC 61643-21 39.5V

C1 test 1kV, 1.2/50μs, 0.5kA 8/20μs to BS EN/IEC 61643-21 26.0V


5kV, 10/700μs2 17V



2.5kA–

2.5kA5kA

8/20μs to ITU (formerly CCITT), BS 6651:1999 Appendix C– per signal wire– per pair

10kA–

10kA20kA

1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & line to earth. Screen to earth let-through voltage will be up to600V (with 5kV 10/700 test), when protector is configured for use with non-earthed or isolated screen systems. Response time <10ns.


3 The installation and connectors external to the protector may limit the capability of the protector.

Mechanical specification ESP CCTV/B ESP CCTV/T


Connection type Coaxial BNC female Screw terminal

Conductor size (stranded) Not applicable 2.5mm2


Casing material Conductive ABS UL94 V-0



Dimensions

Closed Circuit TV video lines | Electronic Systems Protection

ESP CCTV Series

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77Camera telemetry or control lines should be protected with a suitable Lightning Barrier from the D or E Series. Protectors for the power supplyto individual cameras and the mains supply to the control room are available. For coaxial RF (RF Series) cable protectors and CATVsystems (ESP CATV/F) are also available.

Combined Category C, B tested data link protector (toBS EN/IEC 61643) and Combined Type 2 and Type 3 tested mainsprotector (to BS EN/IEC 61643) suitable for Solid State Interlocking(SSI) mains power and data links. Protectors are Network Railapproved. For use on lines running within buildings at boundaries upto LPZ 1 to through to LPZ 3 to protect sensitive electronic equipment.

Features and benefits✔ Accepted for use on Network Rail infrastructure. NRS PADS

references: ESP SSI/M – 086/047066; ESP SSI/B – 086/047067;ESP SSI/120AC – 086/047058 and ESP SSI/140AC – 086/047059(Network Rail Approval PA05/00471)

✔ Very low let-through voltage (enhanced protection to BS EN 62305)between all sets of conductors – Full Mode protection (ESP SSI/120ACand ESP SSI/140AC) and all signal lines (ESP SSI/M)

✔ ESP SSI/B modified base unit can be permanently wired intothe system

✔ ESP SSI/M plug-in protection module can be replaced withoutinterfering with the operation of the system

✔ ESP SSI/B incorporates a 100Ω terminating resistance that can beconnected if required

✔ ESP SSI/B can be flat mounted, or a built-in DIN rail foot allows simpleclip-on mounting to top-hat or G DIN rails

✔ ESP SSI/120AC and ESP SSI/140AC are a compact size for easy installationin trackside cabinets and control rooms

✔ ESP SSI/120AC and ESP SSI/140AC have three way visual indication ofprotector status and advanced pre-failure warning

ApplicationTo prevent transient overvoltage damage to Solid State Interlocking (SSI)systems, protectors should be fitted in trackside cabinets and equipmentrooms, on both the data link and the mains power lines.

✔ For single phase mains power supplies of 90–150 volts,use the ESP SSI/120AC (formerly ESP 120X)

✔ For single phase mains power supplies of 90–165 volts, use theESP SSI/140AC (formerly S065)

✔ For SSI data links, use the ESP SSI/B base unit with the ESP SSI/Mprotection module

Use ESP PTE002 SSI tester for line-side testing of SSI/M modules.

InstallationESP SSI/BConnect in series with the datalink either near where it entersthe trackside location cabinet orthe equipment room.

ESP SSI/120AC and ESP SSI/140ACInstall in parallel, within thetrackside cabinet or equipmentroom.

The protector should be installedon the load side of the fuses, atthe secondary side of the step-down transformer.

Connect, with very short leads, tophase (BX), neutral (NX or CNX)and earth.

1 Earth in Line2 Primary signal in +Line3 Secondary signal

in + Line4 Not connected5 Signal out +

(to DLM) Clean6 Signal out –

(to DLM) Clean7 Not connected8 100Ω terminating Clean

resistor9 Primary signal in - Line10 Secondary signal

in - Line11 Earth in Line

Parallel connection of single phaseprotectors ESP SSI/120AC and ESP SSI/140AC


Furse transient overvoltage protectors aremaintenance free and have long lifetimes –

essential criteria for trackside equipment

Network Rail CertificationAll the products on this page have Network Rail Certificates of Acceptance,allowing them to be used on Network Rail infrastructure.

Electronic Systems Protection | SSI mains power supplies and data links

ESP SSI Series

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78

MAINSTESTTYPE2 + 3


LPZ1→3

eENHANCED


STATUSINDICATION +

VOLT-FREECONTACT

SSI mains power supplies and data links | Electronic Systems Protection

ESP SSI Series

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79

Electrical specification ESP SSI/M

Maximum signal voltage1 7V

Maximum common modestand-off voltage

90Vrms


In-line resistance (per line, ±10%) 4.5Ω

Leakage (Line to line impedance)(Line to earth impedance)

>1MΩ>10kΩ

Differential Bandwidth(50Ω system)

10MHz

1 Maximum signal voltage (DC or AC peak) measured at 200μA.

ESP SSI/BThis is a modified 11 pin ‘relay type’ socket containing a 100Ω ±5%wire-wound 2.5W resistor connected between terminals 8 and 9.Internal links between terminals 2 & 3, 9 & 10, and 1 & 11.

Transient specification ESP SSI/M

Transverse (Differential) ‘let-through’ voltage1 Up

15V

Common mode ‘let-through’voltage2 Up

250V

1 ‘Let-through’ voltage is the maximum transient voltage ‘let-through’ to theequipment to be protected. C2 test (to BS EN/IEC 61643-21) 2kV1.2/50μs. 1kA 8/20μs. ‘Let-through’ voltage (±10%).

2 ‘Let-through’ voltage is the maximum transient voltage ‘let-through’ to theequipment to be protected. C2 test (to BS EN/IEC 61643-21) 4kV1.2/50μs. 2kA 8/20μs. ‘Let-through’ voltage (±20%).

Mechanical specification ESP SSI/M ESP SSI/B


Connection type – Screw terminal

Fixing connection (SSI/B)– Flat mount –

Two M4 fixingholes with

35mm centres

– Top Hat Din rail mount – An integral clip

– G Din rail mount – Two mountingclips with screws

Max load – 10A, 250V

Casing material ABS UL94 V-0


Weight – packaged (per 50) 3.25kg 3.9kg

Dimensions

ESP SSI/120AC ESP SSI/140AC

Nominal voltage - Phase -Neutral Uo (RMS)

120V 140V

Maximum working voltage -Phase - Neutral Uc (RMS)

150V 165V

Working voltage (RMS) 90-150V 90-165V

Frequency range 47 – 63Hz

Current rating (supply) -see installation instructions

100A



Volt free contact1 Screw terminal

– current rating 200mA

– nominal voltage (RMS) 250V

1 Minimum permissible load is 5V DC, 10mA to ensure reliable contactoperation.


Let-through voltage (all conductors)Type 2 (BS EN), Class II (IEC)

Nominal discharge current 8/20μs(per mode) In

5kA

Let-through voltage Up at In 1 460V 540V

Maximum discharge current Imax(per mode)2

20kA


Let-through voltage at Uoc of 6kV1.2/50μs and Isc of 3kA 8/20μs(per mode)3

400V 500V

1 The maximum transient voltage let-through of the protector throughoutthe test (±5%), per mode.

2 The electrical system, external to the unit, may constrain the actual currentrating achieved in a particular installation.

3 Combination wave test within BS 6651:1999 App. C, Cats C-Low & B-High, IEEE C62.41-2002 Location Cats C1 & B3, SS CP 33:1996 App. F, AS1768-1991 App. B, Cat B, UL1449 mains wire-in






Volt free contact Connect via screw terminal withconductor up to 2.5mm2 (stranded)

Case material Steel



Dimensions

Electrical specification ESP CATV/F ESP MATV/F ESP SMATV/F ESP TV/EURO ESP TV/F

Maximum working voltage1 140V 18.9V 18.9V 6.4V 6.4V

Maximum operating current 4A 800mA 800mA 300mA 300mA


Bandwidth 5 – 860MHz 5 – 2450MHz 860 – 2450MHz 5 – 860MHz 5 – 860MHz

Insertion loss: 5 – 860MHz <0.5dB <0.3dB – <0.3dB <0.3dBInsertion loss: 860 – 2150MHz – <1.5dB <1.5dB – –Insertion loss: 2150 – 2450MHz – <2.2dB <2.2dB – –

Return loss (VSWR): 5 – 860MHz – >32dB (<1.05:1) – >32dB (<1.05:1) >32dB (<1.05:1)Return loss (VSWR): 860 – 2150MHz – >20dB (<1.2:1) >20dB (<1.2:1) – –Return loss (VSWR): 2150 – 2450MHz – >20dB (<1.2:1) >20dB (<1.2:1) – –1 Maximum working voltage (DC or AC peak) measured at <5μA (ESP CATV/F) and <50mA (ESP MATV/F, ESP SMATV/F, ESP TV/EURO, ESP TV/F)

Transient specification ESP CATV/F ESP MATV/F ESP SMATV/F ESP TV/EURO ESP TV/F



270V 70V 70V 65V 65V

C1 test 1kV 1.2/50μs, 0.5kA 8/20μs toBS EN/IEC 61643-22

265V 60V 60V 50V 50V

B2 test 4kV 10/700μs to BS EN/IEC 61643-21 245V 45V 45V 30V 30V

5kV, 10/700μs2 250V 50V 50V 35V 35V



3kA 3kA 3kA 3kA 3kA

1 The maximum transient voltage let-through the protector throughout the test (±10%), line to line & line to earth. Response time <10ns.2 Test to BS 6651:1999 Appendix C, Cat C-High, IEC 61000-4-5:1995, ITU-T (formerly CCITT) K.20, K.21 and K.45,

Telcordia GR-1089-CORE, Issue 2:2002, ANSI TIA/EIA/IS-968-A:2002 (formerly FCC Part 68).

Mechanical specification ESP CATV/F, ESP MATV/F, ESP SMATV/F,ESP TV/EURO, ESP TV/F


Connection type F female

Earth connection ~9.5mm (3/8”) diameter earth stud

Case material Diecast



Dimensions M4 clearance holes, Depth=23mm

Combined Category C, B tested protector (to BS EN/IEC 61643)suitable to protect Cable, Terrestrial and Satellite TV systems. For useon lines running within buildings at boundaries up to LPZ 1 tothrough to LPZ 3 to protect sensitive electronic equipment.



✔ Low attenuation and high return loss over awide range of frequencies ensures theprotectors do not impair system performance

✔ Substantial earth termination

✔ Supplied ready for flat mounting

✔ Strong metal housing

ApplicationUse to protect analogue and digitalCable, Terrestrial and Satellite TVinstallations. ESP CATV/F,ESP MATV/F, ESP SMATV/F andESP TV/F are suitable for systemsusing F connectors. ESP TV/EURO issuitable for systems using EURO-TVconnectors. For further informationon TV applications, see separateApplication Note AN006 (contactFurse for a copy).

InstallationConnect in series with the coaxialcable either near where it entersor leaves each building or close toequipment being protected.

DIRTY

CLEAN

Fromline

Toequipment

Earth

Electronic Systems Protection | Coaxial TV systems

ESP TV Series

www.furse.com

80

eENHANCED


SIGNAL/TELECOM

TEST CATC + B

FULL MODEBonding +EquipmentProtection

HIGHBANDWIDTH

LPZ1→3

Protectors for coaxial(or twisted pair)CCTV Lines areavailable. For coaxialRF lines, use the ESP RFSeries. Transientscan also be conducedinto TV systemsvia the mains powersupplies – use suitableESP mains protection.Contact Furse.

Protector accessories

WBX Series 82Moisture and dirt resistant enclosures for the convenient installation of ESP protectors and their CME kits

CME Series 83Combined Mounting and Earthing kits enable the quick and easy installation of a range of protectors byallowing them to be simultaneously mounted and earthed via their central earth studs

Accessories 84Spare and extended cable assemblies, replacement remote display unit, gas discharge tubes, fixing brackets,ESP SSI tester and mains tester

Protector accessories | Electronic Systems Protectionwww.furse.com

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WBX Series

Electronic Systems Protection | Weatherproof enclosures

ApplicationUse WBX enclosures when yourESP protector(s) can’t be installedwithin the existing equipmentpanel or enclosure and for addedprotection in damp and dirtyenvironments.

InstallationThe protector(s), or CME kit, aremounted on the metal base plate,which in turn mounts in theenclosure.

For added security, /GS versions(e.g. WBX 4/GS) are supplied with an

opaque lid and optional securehead screws (plus tool)

SpecificationIf you’ve got . . . . . . use this enclosure1 ESP 240 or 415/XXX/TNS or TNC protector, orsingle phase D1 series protector

WBX D4

1 ESP 415/XXX/TT protector, or three phase D1 series protector WBX D8

1 single phase M1 series protector WBX 3

1 three phase M1 series protector WBX 4

1 ESP M2 series protector WBX M2

1 ESP M4 series protector WBX M4

1 CME 4 and associated protectors WBX 4 or the secure WBX 4/GS

1 CME 8 and associated protectors WBX 8 or the secure WBX 8/GS

1 or 2 CME 16 and associated protectors WBX 16/2/G

1 or 2 single earth stud protectors WBX 2/G

up to 3 single earth stud protectors WBX 3/G

1 double earth stud protector WBX 3/G

A range of moisture and dirt resistant enclosures for theconvenient installation of ESP protectors and their associatedCME kits. Enclosures have a grey base with either a see-through orgrey (part number /G or /GS) lid

Features and benefits✔ Tough polycarbonate enclosures (except ABS WBX 2/G)

✔ Weatherproof – with IP resistance to dirt and water of IP56 or more

✔ Clear lid enables easy visual inspection of the protectors visual statusindication (WBX 3, WBX 4, WBX D4, WBX 8, WBX D8, WBX M2, WBX M4)

✔ Grey lid for applications not needing regular protector inspection(WBX 2/G, WBX 3/G, WBX 4/GS, WBX 8/GS and WBX 16/2/G)

✔ For external CCTV and other installations requiring added security theWBX 4/GS and WBX 8/GS are supplied with an opaque lid and specialsecure head screws (plus tool)

✔ Supplied complete with metal base (mounting) plate with pre-preparedmounting positions and fixing hardware for easy installation (exceptWBX 2/G which has a plain metal base)

WBX 2/G WBX 3WBX 3/G

WBX 4WBX 4/GS

WBX D4 WBX 8WBX 8/GS

WBX D8 WBX 16/2/G WBX M2 WBX M4

Weight - unit- packaged

0.45kg0.5kg

0.5kg0.55kg

0.9kg0.95kg

0.4kg0.45kg

1.3kg1.35kg

0.55kg0.6kg

6.4kg7.6kg

1.9kg2.3kg

2.2kg3.0kg

Dimensions

Length - internal- external

150mm160mm

222mm230mm

225mm235mm

–200mm

225mm235mm

–200mm

460mm474mm

254mm280mm

254mm280mm

Width - internal- external

110mm120mm

72mm80mm

150mm160mm

–123mm

225mm235mm

–195mm

380mm396mm

254mm280mm

254mm280mm

Depth - internal- external

71mm90mm

79mm85mm

100mm117mm

–112mm

100mm117mm

–112mm

120mm128mm

115mm130mm

165mm180mm

Fixing centres (mm) 148 x 90mm 210 x 60 215 x 140 140 centrally 215 x 215 140 x 88 380 x 310 254 x 254 254 x 254

IP rating IP66 IP67 IP66 IP65 IP66 IP65 IP56 IP67 IP67

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CME Series

Combined Mounting and Earthing kits | Electronic Systems Protection

Assembly of CME kit

CME kits allow the simultaneous mountingand earthing of protectors through their

central earth stud.Once installed, single protectors can be

changed without removing others

Enables groups of protectors to be simultaneously mounted andearthed via their earth stud. Suitable for installing protectors withone or two earth studs on their top face. Available with 4, 8, 16and 32 mounting holes.

ApplicationUse CME kits to simultaneously mount and earth groups of single anddouble earth stud protectors. Each single earth stud protector requires oneCME mounting position and each double earth stud protector requires twoCME mounting positions.

✔ Single earth stud protectors areESP 06D ESP 06E ESP 06H ESP CCTV/BESP 15D ESP 15E ESP 15H ESP CCTV/TESP 30D ESP 30E ESP 30HESP 50D ESP 50E ESP 50HESP 110D ESP 110E ESP 110HESP TN ESP RTD.

✔ Double earth stud protectors areESP 120-5A ESP 120-16A ESP ThinNetESP 240-5A ESP 240-16A ESP ThickNetESP 277-5A ESP 277-16A.

Once you know how many CME mounting positions you require choose aCME kit to suit:

✔ CME 4 has 4 mounting positions



✔ CME 32 has 32 mounting positions.

Features and benefits✔ Enables quick and easy

installation of protectors foradded convenience

✔ Speedy installation of groupsof protectors saves time andmoney

✔ Individual protectors can bechanged without needing toremove others

✔ Sturdy construction

✔ Supplied with a choice of flatand round ended fixing screwsto suit your application

AccessoriesEnclosures suitable for a CME 4and its associated protectors(WBX 4/GS), CME 8 and protectors(WBX 8/GS) or one or two CME 16and protectors (WBX 16/2/G).

InstallationThe earth bar is supported by aseries of mounting pillars (whichare fixed to the cubicle or boxbase). Protectors are attached tothe CME’s earth bar via their earthstud(s) and earthed with sharedconnections to earth. We suggestone earth connection permounting pillar.

Specification CME 4 CME 8 CME 16 CME 32

Weight 0.1kg 0.15kg 0.3kg 0.6kg

Dimensions

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www.furse.comElectronic Sytems Protection | Accessories

Accessories

ESP RLA-1, ESP RLA-4, ESP RLA HD-1,ESP RLA HD-4

Cable assemblies for connectingdisplay units to suitable threephase protectors.

Description Length Part No.

Cable assembly for connecting ESPRemote Display Unit (ESP RDU) to ESPM1R, M2R and M4R series

1m ESP RLA-1

Cable assembly for connecting ESPRemote Display Unit (ESP RDU) to ESPM1R, M2R and M4R series

4m ESP RLA-4

Cable assembly for connecting displayunit to three phase ESP XXX D1R/LED orESP XXX D1R/LCD protectors

1m ESP RLA HD-1

Cable assembly for connecting displayunit to three phase ESP XXX D1R/LED orESP XXX D1R/LCD protectors

4m ESP RLA HD-4

ESP RDU

For use with the ESP M1R,M2R and M4R series. See pages34 – 35.

Description Part No.

Remote Display Unit ESP RDU

ESP CAT5e/UTP-1

Cable assembly with RJ45connections for the ESP ISDN/RJ45-4/8 or ESP ISDN/RJ45-8/8plug-in ISDN protectors for useif the standard 0.25m cable isinsufficient. See pages 60 – 61.

Description Length Part No.

Cable assembly with RJ45connections

1m ESPCAT5e/UTP-1

ESP RF BK1, ESP RF BK2

Use with any ESP RFprotector to assistinstallation.See pages 72 – 75.


Straight Mounting plate ESP RF BK1

90º Mounting plate ESP RF BK2

ESP PTE002

Use to test the ESP SSI/Mprotector. See pages 78 – 79.

ESP PTE002 has Network RailApproval PA05/02216. NRS PADSreference 094/020033.

Annual calibration is required,which is processed asESP PTE002/CAL


SSI Portable Tester ESP PTE002

ESP PTE003 NEW

Mains tester for checking wiring and voltages of3 phase 415V power supplies, with visual andaudible indication. Simple and safe to use – justplug into a standard 5 pin 16A 3 phase socket.Contact Furse for details.

ESP RF GDT-x

Description Voltage Part No.

Gas Discharge Tube 90V ESP RF GDT-1






Replacement Gas DischargeTubes for use with standard RFprotectors. See pages 72 – 73.

Replacement Gas Discharge Tubefor use with the ESP RF 111A11,ESP RF AA1A11 andESP RF 441A11 protectors(pages 74 – 75).

Description GDT Voltage Part No.

Gas Discharge Tube 600V ESP RF GDT-A


3 phase mains tester ESP PTE003

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Introduction to BS EN/IEC 62305

Introduction 86 - 87Outlining the development of this new standard for lightning protection, its structureand the key differences between the new and outgoing standard

BS EN/IEC 62305-1 General principles 88 – 90A summary of the main principles of the new standard

BS EN/IEC 62305-2 Risk management 91The critical importance of risk assessment as part of this new standard

BS EN/IEC 62305-3 Physical damage to structures 92 – 97and life hazardIdentifying the requirements and techniques to effectively protect structuresand incoming services

BS EN/IEC 62305-4 Electrical and electronic systems 98 – 101within structuresBS EN/IEC 62305 recognises our increasing reliance on information technology andwith it the importance of protecting electronic systems from transient overvoltage




A new standard inlightning protectionBS 6651:1999 Protection of structures against lightninghas been the cornerstone for guidance on design andinstallation of lightning protection since 1985. InSeptember 2006, however, a new standard forlightning protection, BS EN 62305, was introduced. Fora finite period, both BS 6651 and the new BS EN 62305standard have run in parallel, but, as of August 2008,BS 6651 has been withdrawn and BS EN 62305 is nowthe only recognised standard. BS EN/IEC 62305 hasbecome the relevant, comparable standard applicableto the Far East market.

This new standard reflects increased scientificunderstanding of lightning and its effects over the lasttwenty years, and takes stock of the growing impactof technology and electronic systems on our dailyactivities. More complex and exacting than its 118page predecessor, the 475-page BS EN 62305 isstructured as a series with four parts (as per the IEC62305 version), starting at general principles, then riskmanagement, through to damage to the structure anddamage to electronic systems therein.

Key to the new standard is that all considerations forlightning protection are driven by a comprehensiveand complex risk assessment and that this assessmentnot only takes into account the structure to beprotected, but also the services to which the structureis connected.

In essence, structural lightning protection can nolonger be considered in isolation, protection againsttransient overvoltages or electrical surges are integralto the new standard.

Structure of BS EN/IEC 62305The BS EN/IEC 62305 series consists of four parts,all of which need to be taken into consideration.These four parts are outlined below:

Part 1: General principles

BS EN/IEC 62305-1 (part 1) is an introduction to theother parts of the standard and essentially describeshow to design a Lightning Protection System (LPS) inaccordance with the accompanying parts of thestandard.

Part 2: Risk management

BS EN/IEC 62305-2 (part 2) risk management approach,does not concentrate so much on the purely physicaldamage to a structure caused by a lightning discharge,but more on the risk of loss of human life, loss ofservice to the public, loss of cultural heritage andeconomic loss.

Part 3: Physical damage to structures andlife hazard

BS EN/IEC 62305-3 (part 3) relates directly to the majorpart of BS 6651. It differs from BS 6651 in as much thatthis new part has four Classes or protection levels ofLightning Protection System (LPS), as opposed to thebasic two (ordinary and high-risk) levels in BS 6651.

Part 4: Electrical and electronic systemswithin structures

BS EN/IEC 62305-4 (part 4) covers the protection ofelectrical and electronic systems housed withinstructures. This part essentially embodies what AnnexC in BS 6651 conveyed, but with a new zonal approachreferred to as Lightning Protection Zones (LPZs). Itprovides information for the design, installation,maintenance and testing of a LightningElectromagnetic Impulse (LEMP) protection system forelectrical/electronic systems within a structure.

86

www.furse.comIntroduction to BS EN/IEC 62305

GeneralPrinciples

BS EN/IEC 62305-1

RiskManagement

BS EN/IEC 62305-2

Protectionof the

StructureBS EN/IEC62305-3

ElectronicSystems

ProtectionBS EN/IEC62305-4

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www.furse.com BS EN/IEC 62305 Key points

BS 6651 standard BS EN/IEC 62305 standard

Document structure

118 page document, including 9 pages devoted torisk assessment

475 page document, separated into 4 parts, including153 pages devoted to risk assessment (BS EN 62305-2)

Focus on Protection of Structures against Lightning Broader focus on Protection against Lightning includingthe structure and services connected to the structure

Specific tables relating to choice and dimension ofLightning Protection System components andconductors

Specific tables relating to sizes and types of conductorand earth electrodes.Lightning Protection System components – specificallyrelated to BS EN 50164 testing regimes

Annex B – guidance on application of BS 6651 BS EN/IEC 62305-3 Annex E – extensive guidance givenon application of installation techniques complete withillustrations

Annex C – general advice (recommendation) forprotection of electronic equipment with separate riskassessment

BS EN/IEC 62305-4 is devoted entirely to protection ofelectrical and electronic systems within the structure(integral part of standard) and is implemented throughsingle separate risk assessment (BS EN/IEC 62305-2)

Definition of risk

Risk (of death/injury) level set at 1 in 100,000(1 x 10-5) based on comparable exposures(smoking, traffic accidents, drowning etc)

3 primary risk levels defined (BS EN 62305):R1 loss of human life 1 in 100,000 (1 x 10-5)R2* loss of service to the public 1 in 10,000 (1 x 10-4)R3* loss of cultural heritage 1 in 10,000 (1 x 10-4)*R2 and R3 are 1 in 1000 (1 x 10-3) within IEC 62305-2

Protection measures

Mesh arrangement is promoted as the commonlyused means of air termination network

Mesh arrangement, protective angle method, catenarysystem, extensive use of air finials, all form part of orall of air termination network

2 levels of Lightning Protection mesh design:(20m x 10m; 10m x 5m)

4 sizes of mesh defined according to structural class ofLightning Protection System:Class I 5m x 5m Class II 10m x 10mClass III 15m x 15m Class IV 20m x 20m

2 levels of down conductor spacing:20m & 10m

4 levels of down conductor spacing dependent onstructural class of Lightning Protection System:Class I 10m Class II 10mClass III 15m Class IV 20m

Use of bonds promoted to minimise side flashing Extensive sections/explanations provided onequipotential bonding

10 ohm overall earthing requirement, achieved by10 x number of down conductors

10 ohms overall earthing requirement achieved eitherby Type A arrangement (rods) or Type B arrangement(ring conductor)

Requirement to bond all metallic services, (gas, water,electricity etc) to main earth terminal along withexternal down conductor

Requirement to bond all metallic services to mainequipotential bonding bar. ‘Live’ electrical conductors(e.g. power, data, telecoms) bonded via SurgeProtection Devices (SPDs)

Rolling sphere concept on structures over 20m tall:20m sphere used on highly flammable contents/electronic equipment within building60m sphere all other buildings

4 sizes of rolling sphere concept defined according tostructural class of Lightning Protection System:Class I 20m Class II 30mClass III 45m Class IV 60m

The following table gives a broad outline as to the key variances between the previous standard,BS 6651, and the new standard BS EN/IEC 62305.

BS EN/IEC 62305 Key points

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BS EN/IEC 62305 part 1


Damage and lossBS EN/IEC 62305 identifies four main sources ofdamage:

S1 Flashes to the structure

S2 Flashes near to the structure

S3 Flashes to a service

S4 Flashes near to a service

Each source of damage may result in one or more ofthree types of damage:

D1 Injury of living beings due to step andtouch voltages

D2 Physical damage (fire, explosion, mechanicaldestruction, chemical release) due to lightningcurrent effects including sparking

D3 Failure of internal systems due to LightningElectromagnetic Impulse (LEMP)

The following types of loss may result from damagedue to lightning;

L1 Loss of human life

L2 Loss of service to the public

L3 Loss of cultural heritage

L4 Loss of economic value

The relationships of all of the above parameters aresummarised in Table 3.

Figure 8 on page 89 depicts the types of damage andloss resulting from lightning.

For a more detailed explanation of the generalprinciples forming part 1 of the BS EN 62305 standard,please refer to our full reference guide ‘A Guide toBS EN 62305.’ Although focused on the BS ENstandard, this guide may provide supportinginformation of interest to consultants and schemedesigners in the Far East. Please see page 101 for moredetails about this guide.

Scheme design criteriaThe ideal lightning protection for a structure and itsconnected services would be to enclose the structurewithin an earthed and perfectly conducting metallicshield (box), and in addition provide adequatebonding of any connected services at the entrancepoint into the shield.

This in essence would prevent the penetration of thelightning current and the induced electromagneticfield into the structure.

However, in practice it is not possible or indeed costeffective to go to such lengths.

This standard thus sets out a defined set of lightningcurrent parameters where protection measures,adopted in accordance with its recommendations, willreduce any damage and consequential loss as a resultof a lightning strike. This reduction in damage andconsequential loss is valid provided the lightning strikeparameters fall within defined limits, established asLightning Protection Levels (LPL).

BS EN/IEC 62305-1 General principlesThis opening part of the BS EN/IEC 62305 suite of standards serves as an introduction to the furtherparts of the standard. It classifies the sources and types of damage to be evaluated and introduces therisks or types of loss to be anticipated as a result of lightning activity.

Furthermore, It defines the relationships between damage and loss that form the basis for the riskassessment calculations in part 2 of the standard.

Lightning current parameters are defined. These are used as the basis for the selection andimplementation of the appropriate protection measures detailed in parts 3 and 4 of the standard.

Part 1 of the standard also introduces new concepts for consideration when preparing a lightningprotection scheme, such as Lightning Protection Zones (LPZs) and separation distance.

Point of strike Source ofdamage

Type ofdamage

Type ofloss

Structure S1 D1D2D3

L1, L4**L1, L2, L3, L4L1*, L2, L4

Near astructure

S2 D3 L1*, L2, L4

Serviceconnected tothe structure

S3 D1D2D3

L1, L4**L1, L2, L3, L4L1*, L2, L4

Near a service S4 D3 L1*, L2, L4

* Only for structures with risk of explosion and for hospitals or otherstructures where failures of internal systems immediately endangershuman life.

** Only for properties where animals may be lost.

Table 3: Damage and loss in a structure according to different pointsof lightning strike (BS EN/IEC 62305-1 Table 3)

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S1 Flash to the structure S3 Flash to aservice connectedto the structure

S4 Flash near aservice connectedto the structure

Inducedovervoltage

Inducedovervoltage

S2 Flash near tothe structure

LEMP

Lightningcurrent

LEMP

LEMP

LEMP

Injury to people by stepand touch voltages resultingfrom resistive and inductivecoupling (Source S1)

Fire and/or explosion due to the hotlightning arc itself, due to the resultantohmic heating of conductors, or due to arcerosion ie. melted metal (Source S1)

Injury to people due to touchvoltages inside the structurecaused by lightning currentstransmitted through theconnected service (Source S3)

Immediate mechanicaldamage (Source S1)

Failure or malfunction of internalsystems due to overvoltages inducedon connected lines and transmittedto the structure (Source S3 & S4)or by LEMP (Source S1 & S2)

Fire and/or explosion triggered by sparkscaused by overvoltages resulting from resistiveand inductive coupling and to passage of partof the lightning current (Source S1)

Fire and/or explosion triggered by sparks due toovervoltages and lightning currents transmittedthrough the connected service (Source S3)

Figure 8: The types of damage and loss resulting from a lightningstrike on or near a structure

Lightning Protection Levels (LPL)Four protection levels have been determinedbased on parameters obtained from previouslypublished technical papers. Each level has afixed set of maximum and minimum lightningcurrent parameters. These parameters are shownin Table 4.

The maximum values have been used in the design ofproducts such as lightning protection components andSurge Protection Devices.

The minimum values of lightning current have beenused to derive the rolling sphere radius for each level.

LPL I II III IV

Maximumcurrent (kA)

200 150 100 100

Minimumcurrent (kA)

3 5 10 16

Table 4: Lightning current for each LPL based on10/350μs waveform

For a more detailed explanation of LightningProtection Levels and maximum/minimum currentparameters please see page 16 of our Guide toBS EN 62305.

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Lightning Protection Zones (LPZ)New to BS EN/IEC 62305, the concept ofLightning Protection Zones (LPZ) has beenintroduced particularly to assist in determiningthe protection measures required to establish aLightning Electromagnetic Impulse (LEMP)Protection Measures System (LPMS) within astructure.

The general principle is that the equipment requiringprotection should be located in a Lightning ProtectionZone whose electromagnetic characteristics arecompatible with the equipment stress withstand orimmunity capability.

The concept caters for external zones, with risk ofdirect lightning stroke (LPZ 0A), or risk of partiallightning current occurring (LPZ 0B), and levels ofprotection within internal zones (LPZ 1 & LPZ 2.)

LPZ 0A

LPZ 0B

LPZ 1

LPZ 2

LPZ 3

LPZ 0B

Air termination network

Direct flash, full lightningcurrent, full magnetic field

No direct flash,partial lightningor induced current,full magnetic field

Equipotential bondingby means of SPD

No direct flash, partiallightning or inducedcurrent, dampedmagnetic field

No direct flash,induced currents,further dampedmagnetic field

Rolling sphere radius

Down conductornetwork

Earth termination network

SPD 0B/1

SPD 0B/1

SPD 0B/1

SPD 0B/1

Figure 9: The LPZ concept

In general the higher the number of the zone (LPZ 2;LPZ 3 etc) the lower the electromagnetic effectsexpected. Typically, any sensitive electronic equipmentshould be located in higher numbered LPZs and beprotected by its relevant LPMS measures.

Figure 9 highlights the LPZ concept as applied tothe structure and to an LEMP Protection MeasuresSystem (LPMS). The concept is expanded upon inBS EN/IEC 62305-3 and BS EN/IEC 62305-4.

Selection of the most suitable LEMP protectionmeasures is made using the risk assessment inaccordance with BS EN/IEC 62305-2.

91


BS EN/IEC 62305-2 is key to the correctimplementation of BS EN/IEC 62305-3 andBS EN/IEC 62305-4. The assessment andmanagement of risk is now significantly more indepth and extensive than the approach of BS 6651.

BS EN/IEC 62305-2 specifically deals with making a riskassessment, the results of which define the level ofLightning Protection System (LPS) required. WhileBS 6651 devoted 9 pages (including figures) to thesubject of risk assessment, BS EN/IEC 62305-2 currentlycontains some 153 pages.

The first stage of the risk assessment is to identify whichof the four types of loss (as identified in BS EN/IEC62305-1) the structure and its contents can incur. Theultimate aim of the risk assessment is to quantify and ifnecessary reduce the relevant primary risks i.e.:

R1 risk of loss of human life

R2 risk of loss of service to the public

R3 risk of loss of cultural heritage

R4 risk of loss of economic value

For each of the first three primary risks, a tolerablerisk (RT) is set. This data can be sourced in Table 7 ofIEC 62305-2 or Table NK.1 of the National Annex ofBS EN 62305-2.

Each primary risk (Rn) is determined through a longseries of calculations as defined within the standard. Ifthe actual risk (Rn) is less than or equal to thetolerable risk (RT), then no protection measures areneeded. If the actual risk (Rn) is greater than itscorresponding tolerable risk (RT), then protectionmeasures must be instigated. The above process isrepeated (using new values that relate to the chosenprotection measures) until Rn is less than or equal toits corresponding RT.

It is this iterative process as shown in Figure 10 thatdecides the choice or indeed Lightning ProtectionLevel (LPL) of Lightning Protection System (LPS) andLightning Electro-magnetic Impulse (LEMP) ProtectionMeasures System (LPMS).

StrikeRisk v5.0 risk managementsoftwareAn invaluable tool for those involved in undertakingthe complex risk assessment calculations required byBS EN 62305-2, StrikeRisk v5.0 facilitates theassessment of risk of loss due to lightning strikes andtransient overvoltages caused by lightning.

Quick & easy to use, with full reporting capability,StrikeRisk v5.0 automates risk assessment calculationsand delivers results in minutes, rather than the hoursor days it would take to do the same calculationsby hand.

Contact Furse for more details about StrikeRisk v5.0.

BS EN/IEC 62305-2 Risk management

Figure 10: Procedure for deciding the need for protection(BS EN/IEC 62305-1 Figure 1)

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This part of the suite of standards deals withprotection measures in and around a structureand as such relates directly to the major part ofBS 6651.

The main body of this part of the standard givesguidance on the design of an external LightningProtection System (LPS), internal LPS and maintenanceand inspection programmes.

Lightning Protection System (LPS)BS EN/IEC 62305-1 has defined four LightningProtection Levels (LPLs) based on probable minimumand maximum lightning currents. These LPLs equatedirectly to classes of Lightning Protection System (LPS).

The correlation between the four levels of LPL and LPSis identified in Table 5. In essence, the greater theLightning Protection Level, the higher class ofLightning Protection System is required.

The class of LPS to be installed is governed by theresult of the risk assessment calculation highlighted inBS EN/IEC 62305-2.

External LPS design considerationsThe lightning protection designer must initiallyconsider the thermal and explosive effects caused atthe point of a lightning strike and the consequencesto the structure under consideration. Depending uponthe consequences the designer may choose either ofthe following types of external LPS:

● Isolated

● Non-isolated

An Isolated LPS is typically chosen when the structureis constructed of combustible materials or presents arisk of explosion.

Conversely a non-isolated system may be fitted whereno such danger exists.

An external LPS consists of:

● Air termination system

● Down conductor system

● Earth termination system

These individual elements of an LPS should beconnected together using appropriate lightningprotection components (LPC) complying (in the case ofBS EN 62305) with BS EN 50164 series. This will ensurethat in the event of a lightning current discharge tothe structure, the correct design and choice ofcomponents will minimize any potential damage.

Air termination systemThe role of an air termination system is to capture thelightning discharge current and dissipate it harmlesslyto earth via the down conductor and earthtermination system. Therefore it is vitally important touse a correctly designed air termination system.

BS EN/IEC 62305-3 advocates the following, in anycombination, for the design of the air termination:

● Air rods (or finials) whether they are free standingmasts or linked with conductors to form a meshon the roof

● Catenary (or suspended) conductors, whether theyare supported by free standing masts or linkedwith conductors to form a mesh on the roof

● Meshed conductor network that may lie in directcontact with the roof or be suspended above it (inthe event that it is of paramount importance thatthe roof is not exposed to a direct lightningdischarge)

The standard makes it quite clear that all types of airtermination systems that are used shall meet thepositioning requirements laid down in the body of thestandard. It highlights that the air terminationcomponents should be installed on corners, exposedpoints and edges of the structure.

The three basic methods recommended fordetermining the position of the air terminationsystems are:

● The rolling sphere method

● The protective angle method

● The mesh method

These methods are detailed over the following pages.

BS EN/IEC 62305-3 Physical damageto structures and life hazard

LPL Class of LPS

I I

II II

III III

IV IV

Table 5: Relation between Lightning Protection Level (LPL)and Class of LPS (BS EN/IEC 62305-3 Table 1)

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The rolling sphere methodThe Rolling Sphere method is a simple means ofidentifying areas of a structure that need protection,taking into account the possibility of side strikes to thestructure. The basic concept of applying the rollingsphere to a structure is illustrated in Figure 11.

The rolling sphere method was used in BS 6651, theonly difference being that in BS EN/IEC 62305 thereare different radii of the rolling sphere thatcorrespond to the relevant class of LPS (see Table 6).

This method is suitable for defining zones ofprotection for all types of structures, particularly thoseof complex geometry.

The protective angle methodThe protective angle method is a mathematicalsimplification of the rolling sphere method. Theprotective angle (a) is the angle created between thetip (A) of the vertical rod and a line projected down tothe surface on which the rod sits (see Figure 12).

The protective angle afforded by an air rod is clearly athree dimensional concept whereby the rod isassigned a cone of protection by sweeping the line ACat the angle of protection a full 360º around the airrod.

The protective angle differs with varying height ofthe air rod and class of LPS. The protective angleafforded by an air rod is determined from Table 2 ofBS EN/IEC 62305-3 (see Figure 13).

Varying the protection angle is a change to the simple45º zone of protection afforded in most cases in BS6651. Furthermore the new standard uses the heightof the air termination system above the referenceplane, whether that be ground or roof level (SeeFigure 14).

The protective angle method is suitable for simpleshaped buildings. However this method is only validup to a height equal to the rolling sphere radius ofthe appropriate LPL.

Class of LPS Rolling sphere radius(m)

I 20

II 30

III 45

IV 60

Table 6: Maximum values of rolling sphere radius correspondingto the Class of LPS

Figure 11: Application of the rolling sphere method

Rollingsphereradius

Air terminationrequired

Tip of air termination

Reference plane

Protectiveangle

Radius of protected area

Height of an airtermination rodabove the referenceplane of the areato be protected

h

A

C

Figure 12: The protective angle method for a single air rod

hh2

h1 21

Figure 14: Effect of the height of the reference plane on theprotection angle

Figure 13: Determination of the protective angle(BS EN/IEC 62305-3 Table 2)

00 2 10 20 30

h(m)

I II IIIClass of LPS

IV

40 50 60

10

20

30

40

50

60

70

80˚

Note 1 Not applicable beyond the values marked withOnly rolling sphere and mesh methods apply in these cases

Note 2 h is the height of air-termination above the reference plane of the area to be protected

Note 3 The angle will not change for values of h below 2m

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Non-conventional airtermination systemsA lot of technical (and commercial) debate has ragedover the years regarding the validity of the claimsmade by the proponents of such systems. This topicwas discussed extensively within the technical workinggroups that compiled BS EN/IEC 62305. The outcomewas to remain with the information housed withinthis standard.

Typically, Annex A (normative) which discusses thepositioning of the air rods (finials) states unequivocallythat the volume or zone of protection afforded by theair termination system (e.g. air rod) shall bedetermined only by the real physical dimension of theair termination system. Typically if the air rod is 5m tallthen the only claim for the zone of protectionafforded by this air rod would be based on 5m andthe relevant class of LPS and not any enhanceddimension claimed by some non-conventional air rods.

There is no other standard being contemplated to runin parallel with this standard BS EN/IEC 62305.

Natural componentsWhen metallic roofs are being considered as a naturalair termination arrangement, then BS 6651 gaveguidance on the minimum thickness and type ofmaterial under consideration. BS EN/IEC 62305-3 givessimilar guidance as well as additional information ifthe roof has to be considered puncture proof from alightning discharge (see Table 8).

The mesh methodThis is the method that was most commonly usedunder the recommendations of BS 6651. Again, for thenew standard four different air termination mesh sizesare defined and correspond to the relevant class ofLPS (see Table 7).

This method is suitable where plain surfaces requireprotection if the following conditions are met:

● Air termination conductors must be positioned atroof edges, on roof overhangs and on the ridgesof roof with a pitch in excess of 1 in 10 (5.7º)

● No metal installation protrudes above the airtermination system.

Modern research on lightning inflicted damage hasshown that the edges and corners of roofs are mostsusceptible to damage.

So on all structures particularly with flat roofs,perimeter conductors should be installed as close tothe outer edges of the roof as is practicable.

As in BS 6651, this standard permits the use ofconductors (whether they be fortuitous metalwork ordedicated LP conductors) under the roof. Vertical airrods (finials) or strike plates should be mounted abovethe roof and connected to the conductor systembeneath. The air rods should be spaced not more than10m apart and if strike plates are used as analternative, these should be strategically placed overthe roof area not more than 5m apart.

Class of LPS Mesh size(m)

I 5 x 5

II 10 x 10

III 15 x 15

IV 20 x 20

Table 7: Maximum values of mesh size corresponding tothe Class of LPS

Figure 15: Concealed air termination network

Concealed conductor

Vertical airtermination

Down conductor

Class of LPS Material Thickness(1)

t (mm)Thickness(2)

t’ (mm)

I to IV

Lead - 2.0

Steel (stainless,galvanized)

4 0.5

Copper 5 0.5

Aluminium 7 0.65

Zinc - 0.7

Table 8: Minimum thickness of metal sheets or metal pipes in airtermination systems (BS EN/IEC 62305-3 Table 3)

(1) Thickness t prevents puncture, hot spot or ignition.(2) Thickness t’ only for metal sheets if it is not important to prevent

puncture, hot spot or ignition problems.

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build structures this can be decided at the earlyconstruction stage by using dedicated reinforcing barsor alternatively to run a dedicated copper conductorfrom the top of the structure to the foundation priorto the pouring of the concrete. This dedicated copperconductor should be bonded to the adjoining/adjacentreinforcing bars periodically.

If there is doubt as to the route and continuity of thereinforcing bars within existing structures then anexternal down conductor system should be installed.These should ideally be bonded into the reinforcingnetwork of the structures at the top and bottom ofthe structure.

Down conductorsDown conductors should within the bounds ofpractical constraints take the most direct route fromthe air termination system to the earth terminationsystem. The greater the number of down conductorsthe better the lightning current is shared betweenthem. This is enhanced further by equipotentialbonding to the conductive parts of the structure.

Lateral connections sometimes referred to as coronalbands or ring conductors provided either by fortuitousmetalwork or external conductors at regular intervalsis also encouraged. The down conductor/ringconductor spacing should correspond with therelevant class of LPS (see Table 9).

There should always be a minimum of two downconductors distributed around the perimeter of thestructure. Down conductors should wherever possiblebe installed at each exposed corner of the structure asresearch has shown these to carry the major part ofthe lightning current.

Natural componentsBS EN/IEC 62305, like BS 6651, encourages the use offortuitous metal parts on or within the structure to beincorporated into the LPS.

Where BS 6651 encouraged an electrical continuity whenusing reinforcing bars located in concrete structures, sotoo does BS EN/IEC 62305-3. Additionally, it states thatreinforcing bars are welded, clamped with suitableconnection components or overlapped a minimum of 20times the rebar diameter. This is to ensure that thosereinforcing bars likely to carry lightning currents havesecure connections from one length to the next.

When internal reinforcing bars are required to beconnected to external down conductors or earthingnetwork either of the arrangements shown inFigure 16 is suitable. If the connection from thebonding conductor to the rebar is to be encased inconcrete then the standard recommends that twoclamps are used, one connected to one length of rebarand the other to a different length of rebar. The jointsshould then be encased by a moisture inhibitingcompound such as Denso tape.

If the reinforcing bars (or structural steel frames) areto be used as down conductors then electricalcontinuity should be ascertained from the airtermination system to the earthing system. For new

Class of LPS Typical distances (m)

I 10

II 10

III 15

IV 20

Table 9: Typical values of the distance between down conductorsand between ring conductors according to the Class of LPS

(BS EN/IEC 62305-3 Table 4)

Figure 16: Typical methods of bonding to steel reinforcementwithin concrete

Stranded copper cable(70mm2 PVC insulated)

Cast innon-ferrousbondingpoint

Bonding conductor

Clamped cable to rebarconnection

Steel reinforcement withinconcrete (rebar)

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Earth termination systemThe earth termination system is vital for thedispersion of lightning current safely and effectivelyinto the ground.

In line with BS 6651, the new standard recommends asingle integrated earth termination system for astructure, combining lightning protection, power andtelecommunication systems. The agreement of theoperating authority or owner of the relevant systemsshould be obtained prior to any bonding taking place.

A good earth connection should possess the followingcharacteristics:

● Low electrical resistance between the electrodeand the earth. The lower the earth electroderesistance the more likely the lightning currentwill choose to flow down that path in preferenceto any other, allowing the current to be conductedsafely to and dissipated in the earth

● Good corrosion resistance. The choice of materialfor the earth electrode and its connections is ofvital importance. It will be buried in soil for manyyears so has to be totally dependable

The standard advocates a low earthing resistancerequirement and points out that it can be achievedwith an overall earth termination system of 10 ohmsor less.

Three basic earth electrode arrangements are used.

● Type A arrangement

● Type B arrangement

● Foundation earth electrodes

Type A arrangementThis consists of horizontal or vertical earth electrodes,connected to each down conductor fixed on theoutside of the structure. This is in essence the earthingsystem used in BS 6651, where each down conductorhas an earth electrode (rod) connected to it.

Type B arrangementThis arrangement is essentially a ring earth electrodethat is sited around the periphery of the structure andis in contact with the surrounding soil for a minimum80% of its total length (i.e. 20% of its overall lengthmay be housed in say the basement of the structureand not in direct contact with the earth).

Foundation earth electrodesThis is essentially a type B earthing arrangement. Itcomprises conductors that are installed in the concretefoundation of the structure. If any additional lengthsof electrodes are required they need to meet the samecriteria as those for type B arrangement. Foundationearth electrodes can be used to augment the steelreinforcing foundation mesh.

Separation (isolation) distance ofthe external LPSA separation distance (i.e. the electrical insulation)between the external LPS and the structural metalparts is essentially required. This will minimise anychance of partial lightning current being introducedinternally in the structure. This can be achieved byplacing lightning conductors sufficiently far away fromany conductive parts that have routes leading into thestructure. So, if the lightning discharge strikes thelightning conductor, it cannot `bridge the gap’ andflash over to the adjacent metalwork.

A sample of Furse high quality earthing components.

BS EN/IEC 62305 recommends a singleintegrated earth termination system for astructure, combining lightning protection,power and telecommunication systems.

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Internal LPS design considerationsThe fundamental role of the internal LPS is to ensurethe avoidance of dangerous sparking occurring withinthe structure to be protected. This could be due,following a lightning discharge, to lightning currentflowing in the external LPS or indeed other conductiveparts of the structure and attempting to flash or sparkover to internal metallic installations.

Carrying out appropriate equipotential bondingmeasures or ensuring there is a sufficient electricalinsulation distance between the metallic parts canavoid dangerous sparking between differentmetallic parts.

Lightning equipotential bondingEquipotential bonding is simply the electricalinterconnection of all appropriate metallicinstallations/parts, such that in the event of lightningcurrents flowing, no metallic part is at a differentvoltage potential with respect to one another. If themetallic parts are essentially at the same potentialthen the risk of sparking or flash over is nullified.

This electrical interconnection can be achieved bynatural/fortuitous bonding or by using specificbonding conductors that are sized according to Tables8 and 9 of BS EN/IEC 62305-3.

Bonding can also be accomplished by the use of surgeprotection devices (SPDs) where the direct connectionwith bonding conductors is not suitable.

Figure 17 (which is based on BS EN/IEC 62305-3 figE.45) shows a typical example of an equipotentialbonding arrangement. The gas, water and centralheating system are all bonded directly to theequipotential bonding bar located inside but close toan outer wall near ground level. The power cable isbonded via a suitable SPD, upstream from the electricmeter, to the equipotential bonding bar. This bondingbar should be located close to the main distributionboard (MDB) and also closely connected to the earthtermination system with short length conductors. Inlarger or extended structures several bonding barsmay be required but they should all be interconnectedwith each other.

The screen of any antenna cable along with anyshielded power supply to electronic appliances beingrouted into the structure should also be bonded at theequipotential bar.

Further guidance relating to equipotential bonding,meshed interconnection earthing systems and SPDselection can be found in the Furse guidebook.

Figure 17: Example of main equipotential bonding

Equipotentialbonding bar

Central heating system

Screen of antenna cable

Electronic appliances

Power from utility

Meter

Meter

Gas

Water

Electricitymeter

Consumer unit/fuseboard

SPD

ON

OFF

Neutral bar

Live bar

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Electronic systems now pervade almost every aspect ofour lives, from the work environment, through fillingthe car with petrol and even shopping at the localsupermarket. As a society, we are now heavily relianton the continuous and efficient running of suchsystems. The use of computers, electronic processcontrols and telecommunications has exploded duringthe last two decades. Not only are there more systemsin existence, the physical size of the electronicsinvolved has reduced considerably (smaller size meansless energy required to damage circuits).

BS EN/IEC 62305 accepts that we now live in theelectronic age, making LEMP (LightningElectromagnetic Impulse) protection for electronic andelectrical systems integral to the standard throughpart 4. LEMP is the term given to the overallelectromagnetic effects of lightning, includingconducted surges (transient overvoltages and currents)and radiated electromagnetic field effects.

LEMP damage is so prevalent such that it is identifiedas one of the specific types (D3) to be protectedagainst and that LEMP damage can occur from ALLstrike points to the structure or connected services –direct or indirect – for further reference to the typesof damage caused by lightning see Table 3 onpage 88. This extended approach also takes intoaccount the danger of fire or explosion associatedwith services connected to the structure, e.g. power,telecoms and other metallic lines.

Lightning is not the only threat…Transient overvoltages caused by electrical switchingevents are very common and can be a source ofconsiderable interference. Current flowing through a

conductor creates a magnetic field in which energy isstored. When the current is interrupted or switchedoff, the energy in the magnetic field is suddenlyreleased. In an attempt to dissipate itself it becomes ahigh voltage transient.

The more stored energy, the larger the resultingtransient. Higher currents and longer lengths ofconductor both contribute to more energy stored andalso released!

This is why inductive loads such as motors,transformers and electrical drives are all commoncauses of switching transients.

Significance of BS EN/IEC 62305-4Previously transient overvoltage or surge protectionwas included as an advisory annex in the BS 6651standard, with a separate risk assessment. As a resultprotection was often fitted after equipment damagewas suffered, often through obligation to insurancecompanies. However, the new BS EN/IEC 62305standard’s single risk assessment dictates whetherstructural and/or LEMP protection is required hencestructural lightning protection cannot now beconsidered in isolation from transient overvoltageprotection - known as Surge Protective Devices (SPDs)within this new standard. This in itself is a significantdeviation from that of BS 6651.Motors create switching events

BS EN/IEC 62305-4 Electrical andelectronic systems within structures

Indeed, as per BS EN/IEC 62305-3, an LPS system can nolonger be fitted without lightning current orequipotential bonding SPDs to incoming metallicservices that have “live cores” – such as power andtelecoms cables – which cannot be directly bondedto earth. Such SPDs are required to protect againstthe risk of loss of human life by preventingdangerous sparking that could present fire or electricshock hazards.

Lightning current or equipotential bonding SPDs arealso used on overhead service lines feeding thestructure that are at risk from a direct strike. However,the use of these SPDs alone “provides no effectiveprotection against failure of sensitive electrical orelectronic systems”, to quote BS EN/IEC 62305 part 4,which is specifically dedicated to the protection ofelectrical and electronic systems within structures.

Lightning current SPDs form one part of a coordinatedset of SPDs that include overvoltage SPDs – which areneeded in total to effectively protect sensitiveelectrical and electronic systems from both lightningand switching transients.

Lightning Protection Zones (LPZs)Whilst BS 6651 recognised a concept of zoningin Annex C (Location Categories A, B and C),BS EN/IEC 62305-4 defines the concept of LightningProtection Zones (LPZs). Figure 18 illustrates the basicLPZ concept defined by protection measures againstLEMP as detailed within part 4.

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Boundaryof LPZ 2(shielded room)

Boundaryof LPZ 1(LPS)

Antenna

Electricalpower line

Water pipe

Gas pipe

Telecomsline

Mast orrailing

LPZ 2

LPZ 1

Criticalequipment

Equipment

SPD 1/2 - Overvoltage protection

SPD 0/1 - Lightning current protection

Equipment

LPZ 0

Figure 18: Basic LPZ concept – BS EN/IEC 62305-4

Within a structure a series of LPZs are created to have,or identified as already having, successively lessexposure to the effects of lightning. Successive zonesuse a combination of bonding, shielding andcoordinated SPDs to achieve a significant reduction inLEMP severity, from conducted surge currents and,transient overvoltages, as well as radiated magneticfield effects. Designers coordinate these levels so thatthe more sensitive equipment is sited in the moreprotected zones.

The LPZs can be split into two categories – 2 externalzones (LPZ 0A, LPZ 0B) and usually 2 internal zones(LPZ 1, 2) although further zones can be introducedfor a further reduction of the electromagnetic fieldand lightning current if required.

External zonesLPZ 0A is the area subject to direct lightning strokesand therefore may have to carry up to the fulllightning current. This is typically the roof area of astructure. The full electromagnetic field occurs here.

LPZ 0B is the area not subject to direct lightningstrokes and is typically the sidewalls of a structure.However the full electromagnetic field still occurs hereand conducted partial lightning currents andswitching surges can occur here.

Internal zonesLPZ 1 is the internal area that is subject to partiallightning currents. The conducted lightning currentsand/or switching surges are reduced compared withthe external zones LPZ 0A, LPZ 0B. This is typically thearea where services enter the structure or where themain power switchboard is located.

LPZ 2 is an internal area that is further located insidethe structure where the remnants of lightning impulsecurrents and/or switching surges are reducedcompared with LPZ 1. This is typically a screenedroom or, for mains power, at the sub-distributionboard area.

Protection levels within a zone must be coordinatedwith the immunity characteristics of the equipment tobe protected, i.e., the more sensitive the equipment,the more protected the zone required. The existingfabric and layout of a building may make readilyapparent zones, or LPZ techniques may have to beapplied to create the required zones.

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Protection with LEMP ProtectionMeasures System (LPMS)Some areas of a structure, such as a screened room,are naturally better protected from lightning thanothers and it is possible to extend the more protectedzones by careful design of the LPS, earth bonding ofmetallic services such as water and gas, and cablingtechniques. However it is the correct installation ofcoordinated Surge Protection Devices (SPDs) thatprotect equipment from damage as well as ensuringcontinuity of its operation – critical for eliminatingdowntime. These measures in total are referred to as aLEMP Protection Measures System (LPMS).

When applying bonding, shielding and SPDs, technicalexcellence must be balanced with economic necessity.For new builds, bonding and screening measures canbe integrally designed to form part of the completeLPMS. However, for an existing structure, retrofitting aset of coordinated SPDs is likely to be the easiest andmost cost-effective solution.

Coordinated SPDsBS EN/IEC 62305-4 emphasises the use of coordinatedSPDs for the protection of equipment within theirenvironment. This simply means a series of SPDs whoselocations and LEMP handling attributes arecoordinated in such a way as to protect the equipmentin their environment by reducing the LEMP effects toa safe level. So there may be a heavy duty lightningcurrent SPD at the service entrance to handle themajority of the surge energy (partial lightning currentfrom an LPS and/or overhead lines) with the respectivetransient overvoltage controlled to safe levels bycoordinated plus downstream overvoltage SPDs toprotect terminal equipment including potentialdamage by switching sources, e.g. large inductivemotors. Appropriate SPDs should be fitted whereverservices cross from one LPZ to another.

Coordinated SPDs have to effectively operate togetheras a cascaded system to protect equipment in theirenvironment. For example the lightning current SPD atthe service entrance should handle the majority ofsurge energy, sufficiently relieving the downstreamovervoltage SPDs to control the overvoltage. Poor

coordination could mean that the overvoltage SPDsare subject to too much surge energy putting bothitself and potentially equipment at risk from damage.

Furthermore, voltage protection levels or let-throughvoltages of installed SPDs must be coordinated withthe insulating withstand voltage of the parts of theinstallation and the immunity withstand voltage ofelectronic equipment.

Enhanced SPDsWhilst outright damage to equipment is not desirable,the need to minimize downtime as a result of loss ofoperation or malfunction of equipment can also becritical. This is particularly important for industries thatserve the public, be they hospitals, financialinstitutions, manufacturing plants or commercialbusinesses, where the inability to provide their servicedue to the loss of operation of equipment wouldresult in significant health and safety and/orfinancial consequences.

Standard SPDs may only protect against commonmode surges (between live conductors and earth),providing effective protection against outrightdamage but not against downtime due tosystem disruption.

BS EN 62305 therefore considers the use of enhancedSPDs (SPD*) that further reduce the risk of damageand malfunction to critical equipment wherecontinuous operation is required. Installers willtherefore need to be much more aware of theapplication and installation requirements of SPDs thanperhaps they may have been previously.

Superior or enhanced SPDs provide lower (better) let-through voltage protection against surges in bothcommon mode and differential mode (between liveconductors) and therefore also provide additionalprotection over bonding and shielding measures. Suchenhanced SPDs can even offer up to mains Type 1+2+3or data/telecom Test Cat D+C+B protection within oneunit. As terminal equipment, e.g. computers, tends tobe more vulnerable to differential mode surges, thisadditional protection can be a vital consideration.

Appropriate SPDsshould be fitted

wherever servicescross from one LPZ

to another

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ConclusionLightning poses a clear threat to a structure but agrowing threat to the systems within the structuredue to the increased use and reliance of electrical andelectronic equipment. The new BS EN/IEC 62305 seriesof standards clearly acknowledge this. Structurallightning protection can no longer be in isolationfrom transient overvoltage or surge protection ofequipment. The use of enhanced SPDs provides apractical cost-effective means of protection allowingcontinuous operation of critical systems duringLEMP activity.

Furse only offerenhanced SPDswith industryleading low

let-through voltage

Furthermore, the capacity to protect against commonand differential mode surges permits equipment toremain in continued operation during surge activity –offering considerable benefit to commercial, industrialand public service organisations alike.

Furse only offer enhanced SPDs with industry leadinglow let-through voltage, as they are the best choice toachieve cost-effective, maintenance-free repeatedprotection in addition to preventing costly systemdowntime. Low let-through voltage protection in allcommon and differential modes means fewer units arerequired to provide protection, which saves on unitand installation costs, as well as installation time.

A Guide to BS EN 62305:2006 Protection Against Lightning

Further to this summary on BS EN/IEC 62305, wehave available a comprehensive guide to the newBS EN 62305:2006 Standard for those interested inlearning more about the new developmentsgoverning lightning protection design andinstallation. This A4 Guide helps to explain in clearand concise terms the requirements of BS EN62305:2006. Following the 4 sections of theStandard (Part 1 – General principles; Part 2 – Riskmanagement; Part 3 – Physical damage to structuresand life hazard; and Part 4 – Electrical and electronicsystems within structures) the Guide provides theinformation necessary to enable the reader toidentify all risks and calculate the required level ofprotection in accordance with BS EN 62305:2006.

Although focused on the BS EN standard, this guidemay provide supporting information of interest toconsultants and scheme designers in the Far East.

To request your free of charge copy – contact usdirectly at any of the addresses given on the backcover or visit www.furse.com

A Guide to BS EN 62305:2006

Protection Against Lightning2nd edition

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Application index

Application index

● Alarm systemslow current mains supplies 38-39signal lines 44-51

● Base stationsmains power 24-37RF coax 72-75telephone/telemetry 44-45, 50-51

● Boxes 82● Cable television (CATV) 80● CCTV

power 38-39telemetry 44-45video 76-77

● Company background 2● Control systems

mains power supplies 32-33, 38-39signal lines 44-49, 52-53

● Data communicationhigh density 52-53LSA-PLUS MDF 54-55PCB mount 56-57RS 232 44-45twisted pair 44-53, 58twisted pair Ethernet 52-53

● DC powerup to 1.25A 46-47up to 4A 48-4912, 24, 36 and 48Vdc 36-37

● Distribution boards/panels 24-35● Door access systems

low current mains supplies 38-39signal lines 44-51

● Earthing and Mounting kits 83● Enclosures 82● Fused connection/spur units 38-39● How to apply

transient overvoltage protection 20-21● ISDN line

S/T interface 60-63U interface 62-63

● Low current mains supplies 38-39● Main distribution board (MDB) 24-35● Main distribution frame 62-63

(telecom)● Mains distribution systems

single phase 32-33three phase 24-35

● Mains power suppliesDC power 36-37plug-in 40-41single phase – 5A or less 38-39single phase – 16A or less 38-39single phase – other currents 32-33three phase 24-35three phase, remote status display 34-35

● Modems 44-45, 50-51, 60-61, 66-67● Mounting and Earthing kits 83● Networks

10 base 2 7010 base 5 7010 base T 64-65, 68-69100 base T 64-65, 68-69async RS 232 66-67category 3 with RJ45 plug and 64-65socketcategory 4 with RJ45 plug and 64-65socketcategory 5 with RJ45 64-65, 68-69plug and socketcheapernet 70coaxial Ethernet 70D connector 66-67Fast Ethernet 68-69IEEE 802.3 70

● Networks continued

RJ45 64-65, 68-69RS 232 66-67RS 422/423 66-69RS 485 66-67thick Ethernet 70thin Ethernet 70Token Ring 64-65, 68-69twisted pair Ethernet 64-65

● PBX– see private branch exchange

● Power distribution unit (PDU) 24-35● Private branch exchange

data and signal lines 54-55ISDN/telephone lines 62-63plug-in power protector 40-41

● Process control signals 44-49, 52-53● Radio frequency (RF) systems 72-75● Rail

mains power 32-33, 38-39, 78-79Solid State Interlocking (SSI) 78-79CCTV video 76-77data/signal 50-51telephone lines 50-51test equipment 84

● Resistance Temperature Detector 58high density 52-53

● Signal lines4-20mA loop 46-47, 52-53alarm 46-51CCTV telemetry/control 44-49CCTV video 76-77LSA-PLUS MDF 54-55PCB mount 56-57process control 44-49, 52-53RS 485 44-45, 52-53, 66-67RTD 58twisted pair 40-47, 52-53

● Single phase mains 32-33, 38-39power supplies

● Switchgearsingle phase 32-33three phase 30-35

● Telemetryfor CCTV cameras 44-49via dial-up telephone line(ringing voltage) 44-45, 50-51, 60-61via private wire or leasedtelephone lines 44-45, 50-51

● Telephone exchange– see private branch exchange

● Telephone lineBT jack plug to socket 60-61high density 52-53lease line 44-45, 50-51LSA-PLUS MDF 62-63PCB mount 56private wire 44-45, 50-51PSTN 44-45, 50-51RJ11 plug to socket 60-61twisted pair 44-45, 50-51

● Three phase mains power 24-35supplies

● Transient overvoltage protectiontechnical information 12-21

● Twisted pair data communication,signal and telephone lines 44-53, 58

● Uninterruptible powersupplies (UPS) 32-33, 30-31, 40-41

● Weatherproof enclosures 82

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www.furse.com Part number index

Part number index

CME 16 83CME 32 83CME 4 83CME 8 83ESP 06D 44-45ESP 06D/2BX 50-51ESP 06D/2BX/I 50-51ESP 06D/BX 50-51ESP 06D/BX/I 50-51ESP 06E 46-47ESP 06H 48-49ESP 06Q 52-53ESP 110D 44-45ESP 110D/2BX 50-51ESP 110D/2BX/I 50-51ESP 110D/BX 50-51ESP 110D/BX/I 50-51ESP 110E 46-47ESP 110H 48-49ESP 110Q 52-53ESP 12 DC 36-37ESP 120 D1 28-29ESP 120 M1 32-33ESP 120-16A 38-39ESP 120-16A/BX 38-39ESP 120-5A 38-39ESP 120-5A/BX 38-39ESP 15D 44-45ESP 15D/2BX 50-51ESP 15D/2BX/I 50-51ESP 15D/BX 50-51ESP 15D/BX/I 50-51ESP 15E 46-47ESP 15H 48-49ESP 15Q 52-53ESP 208 D1 28-29ESP 208 M1 32-33ESP 24 DC 36-37ESP 240 D1 28-29ESP 240 M1 32-33ESP 240/I/TNC 24-25ESP 240/I/TNS 24-25ESP 240/I/TT 24-25ESP 240/III/TNC 24-25ESP 240/III/TNS 24-25ESP 240/III/TT 24-25ESP 240-16A 38-39ESP 240-16A/BX 38-39ESP 240-5A 38-39ESP 240-5A/BX 38-39ESP 277 D1 28-29ESP 277 M1 32-33ESP 277-16A 38-39ESP 277-16A/BX 38-39ESP 277-5A 38-39ESP 277-5A/BX 38-39ESP 30D 44-45ESP 30D/2BX 50-51ESP 30D/2BX/I 50-51ESP 30D/BX 50-51ESP 30D/BX/I 50-51ESP 30E 46-47ESP 30H 48-49ESP 30Q 52-53ESP 36 DC 36-37ESP 415 D1 28-29ESP 415 M1 32-33ESP 415 M1R 34-35ESP 415 M2 30-31ESP 415 M2R 34-35ESP 415 M4 30-31ESP 415 M4R 34-35ESP 415/I/TNC 26-27ESP 415/I/TNS 26-27ESP 415/I/TT 26-27

ESP 415/III/TNC 26-27ESP 415/III/TNS 26-27ESP 415/III/TT 26-27ESP 48 DC 36-37ESP 480 D1 28-29ESP 480 M1 32-33ESP 480 M1R 34-35ESP 480 M2 30-31ESP 480 M2R 34-35ESP 480 M4 30-31ESP 480 M4R 34-35ESP 50D 44-45ESP 50D/2BX 50-51ESP 50D/2BX/I 50-51ESP 50D/BX 50-51ESP 50D/BX/I 50-51ESP 50E 46-47ESP 50H 48-49ESP 50Q 52-53ESP Cat-5 64-65ESP Cat-5/Gigabit 64-65ESP Cat-5/PoE 64-65ESP Cat-5e 64-65ESP Cat-5e/Gigabit 64-65ESP Cat5e/UTP-1 84ESP CATV/F 80ESP CCTV/B 76-77ESP CCTV/T 76-77ESP ISDN/RJ45-4/8 60-61ESP ISDN/RJ45-8/8 60-61ESP K10T1 62-63ESP K10T1/PTC 62-63ESP K10T2 62-63ESP KE10 54-55ESP KS06 54-55ESP KS15 54-55ESP KS30 54-55ESP KS50 54-55ESP KT1 62-63ESP KT1/PTC 62-63ESP KT2 62-63ESP LA-15/15 66-67ESP LA-25/25 66-67ESP LA-5/25 66-67ESP LA-9/9 66-67ESP LB-15/15 66-67ESP LB-25/25 66-67ESP LB-9/9 66-67ESP LN 68-69ESP LN-16/16 68-69ESP LN-4 68-69ESP LN-8 68-69ESP LN-8/16 68-69ESP MATV/F 80ESP MC 40-41ESP MC 40-41ESP MC/Cat 5-e 40-41ESP MC/TN/RJ11-4/6 40-41ESP PCB/06D 56ESP PCB/06E 57ESP PCB/110D 56ESP PCB/110E 57ESP PCB/15D 56ESP PCB/15E 57ESP PCB/30D 56ESP PCB/30E 57ESP PCB/50D 56ESP PCB/50E 57ESP PCB/TN 56ESP PTE002 84ESP PTE003 84ESP RDU 84ESP RF 111A11 74-75ESP RF 111x21 72-73ESP RF 441A11 74-75

ESP RF 441x21 72-73ESP RF AA1A11 74-75ESP RF AA1x21 72-73ESP RF BK1 84ESP RF BK2 84ESP RF GDT-x 84ESP RLA HD-1 84ESP RLA HD-4 84ESP RLA-1 84ESP RLA-4 84ESP RTD 58ESP RTDQ 52-53ESP SMATV/F 80ESP SSI/120AC 78-79ESP SSI/140AC 78-79ESP SSI/B 78-79ESP SSI/M 78-79ESP ThickNet 70ESP ThinNet 70ESP TN 44-45ESP TN/2BX 50-51ESP TN/2BX/I 50-51ESP TN/BX 50-51ESP TN/BX/I 50-51ESP TN/JP 60-61ESP TN/RJ11-2/6 60-61ESP TN/RJ11-4/6 60-61ESP TN/RJ11-6/6 60-61ESP TNQ 52-53ESP TV/EURO 80ESP TV/F 80WBX 16/2/G 82WBX 2/G 82WBX 3 82WBX 3/G 82WBX 4 82WBX 4/GS 82WBX 8 82WBX 8/GS 82WBX D4 82WBX D8 82WBX M2 82WBX M4 82

Waste Electrical and Electronic Equipment (WEEE) and Restriction of Hazardous Substances (RoHS) regulations

From 1st July 2007, the Waste Electrical and Electronic Equipment Regulation (WEEE) was introduced. Although disposal of SurgeProtection Devices (SPDs) is not covered by the regulations, Furse (a Thomas & Betts company) has established contracts with thirdparties to provide effective disposal of SPDs should the need arise. There may be a recycling charge for this service, which may varyfrom time to time. Furthermore, Furse SPDs are designed and manufactured using components that ensure they are RoHScompliant, even though SPDs are not covered by the RoHS regulations. Please contact Furse for further details.

104

www.furse.com

Customer services

Customer services

Customer sales/technical advice and serviceOur sales and technical teams are ready to assist with all your lightningprotection needs. Please contact us on the numbers below to place orders,request quotations and for technical assistance. Calls may be monitored toassist with sales training and our customer care programme.

Tel: +65 6720 8828

Fax: +65 6720 8780

E-mail: [email protected]

In addition to credit accounts, we can also accept payments by VISA andMaster Card.

WebsiteVisit www.furse.com today for the latest Furse news, information andworldwide distributor contact details. Our site also contains searchabletechnical details for structural lightning protection, earthing materials,transient overvoltage protectors and FurseWELD products. Full productdetails can be downloaded in PDF format.

www.furse.com

Technical support/training and seminarsAs industry leader, Furse is ideally placed to provide the latest, mostrelevant information and support regarding changes to the standards orregulations involving lightning protection.

Furse offers seminars to assist our customers to appreciate importantchanges to lightning protection standards, the impact these changes haveon ongoing business and planning, and how to manage these changes forbetter implementation of lightning protection systems.

Seminars can be held centrally at key geographical locations, or at customeroffices if preferred. Contact Furse for further details.

Home to many well known brands and with over 100 years experience, Thomas & Betts provides a truly world-classlevel of quality, service and support. The electrical division provides the following key products:

Electrical products

An impressive range of high quality products

to fasten, install, insulate, protect and connect

electrical cables, with the confidence to achieve

a highly professional result.

Premium cable ties for the most demanding

applications, including the Ty-Rap® cable ties with a

steel locking barb and the Ty-Met™ self-locking

stainless steel ties.

A wide variety of multi-purpose heat shrink tubing

for use in insulation, protection, identification and

strain relief.

A broad range of solderless termination systems

for a variety of applications, including power

cables, shielded cables and magnet wire.

A range of liquidtight flexible conduits & fittings

for the protection of electrical cables in industrial

applications, in metallic and non-metallic versions

(including Nylon conduits & fittings).

A new range of cast resin joints for splicing and

branching low voltage cables, in applications like

street, leisure and airfield lighting, utility & home

connections.

A range of spring steel fasteners for quick, easy

and reliable fixing of services to steelwork.

Earthing & Lightningprotection solutions

With Furse, T&B is leading in the design,

manufacture and supply of earthing and

lightning protection systems.

Through its range of products, Furse can provide

complete and innovative solutions for lightning

protection, surge protection and earthing

applications.

Safety equipment forhazardous areas

DTS specializes in the provision of advanced safety

lighting solutions for hazardous and hostile areas to

a wide variety of industrial markets, including

drilling, marine, oil & gas and pharmaceutical.

Street and amenity lightingcontrol equipment

Royce Thompson is a leading manufacturer of high

quality, reliable and energy efficient photo-

electronic lighting control equipment for street and

amenity lighting.

Emergency lighting &fire detection systems

T&B is well represented on the emergency

lighting and fire detection markets with

various leading brands providing dedicated

solutions for safe evacuation of buildings

and sites.

Emergi-Lite Safety Systems is the provider of

advanced emergency lighting and fire detection

systems, with field project support at the design

stage through to commissioning and maintenance.

The emergency lighting engineers, providing

innovation and the latest technology to the OEM

lighting industry.

Kaufel, formerly known as NIFE, is a strong brand

in emergency lighting products and safety power

supply systems, among which product brands are

Sentara, Venter and Twister.

Kaufel supplies a complete range of dedicated

emergency lighting luminaries and central battery

and testing systems with product brands like Brio,

Elitt and Sesam.

VanLien provides a wide range of emergency

lighting solutions, ranging from luminaries to

central battery systems with product brands like

Optilux, Aqualux and Serenga.

SINGAPOREThomas & Betts Asia(Singapore) Pte Ltd10 Ang Mo Kio Street 65#06-07 TechpointSingapore 569059

Tel +65 6720 8828Fax +65 6720 8780Email [email protected]

CHINAThomas & Betts Asia(Singapore) Pte Ltd –Beijing Representative OfficeRoom 2208, Golden TowerNo. 1 Xi Ba He South RoadChaoyang DistrictBeijing 100028China

Tel +86 10 6440 2395Fax +86 10 6440 2440

Shanghai OfficeRoom 1406, Block DShanghai Everbright Convention& Exhibition CenterNo. 80 Caobao RoadXuhui DistrictShanghai 200235China

Tel +8621 6432 9508Fax +8621 6432 9507

www.tnb-asia.com

KOREAThomas & Betts Asia(Singapore) Pte Ltd – Korea BranchUnit 2106, 21st Floor, Block BTrapalace Officetel, 559, Dohwa-DongMapo-Gu, Seoul 121-784Korea

Tel +82 2 761 0398Fax +82 2 761 0399

MALAYSIAThomas & Betts Asia (Malaysia) Sdn BhdLevel 20, Menara Standard Chartered30, Jalan Sultan Ismail50250 Kuala LumpurMalaysia

Tel +603 2117 5068Fax +603 2117 5069

VIETNAMThe Representative Office ofThomas & Betts Asia (Singapore) Pte Ltdin Ho Chi Minh CityRM 723-1, 7th Floor, Regus Melinh Point TowerNo. 2, Ngo Duc Ke Street, District 1Ho Chi Minh CityVietnam

Tel +848 3520 2989Fax +848 3520 2990

The content of this Thomas & Betts catalogue has been carefully checked for accuracy at the time of print. However, Thomas & Bettsdoesn’t give any warranty of any kind, express or implied, in this respect and shall not be liable for any loss or damage that may resultfrom any use or as a consequence of any inaccuracies in or any omissions from the information which it may contain. E&OE.

Copyright Thomas & Betts 2009. Copyright in these pages is owned by Thomas & Betts except where otherwise indicated. No part of thispublication may be reproduced, copied or transmitted in any form or by any means, without our prior written permission. Images, trademarks, brands, designs and technology are also protected by other intellectual property rights and may not be reproduced orappropriated in any manner without written permission of their respective owners. Thomas & Betts reserves the right to change andimprove any product specifications or other mentions in the catalogue at its own discretion and at any time. These conditions of use aregoverned by the laws of the Netherlands and the courts of Amsterdam shall have exclusive jurisdiction in any dispute.

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