GM6 MV Gas Insulated Switchgear up to 36 kV · With GM6, the user benefits from: ... An inspection...

Medium VoltageDistribution

GM6MV Gas Insulated Switchgearup to 36 kV

2 Schneider Electric

GM6 General presentationProtection and controlof electrical networks

For over 30 years, Schneider has been providing Medium Voltage electricalnetwork protection, monitoring and control solutions in the public distribution,industry and building sectors.GM6 is a range of medium voltage equipment included in an offer that covers allthe functions required for network operation.

Public distribution networksNetwork telecontrol (SCADA & DMS)Milenium

Main functions:t supervisory control and data acquisition,t network restoration,t wallboard replacement,t geographic and schematic views,t switching schedules,t safety, checks and documentation,t outage statistics,t management of maintenance operations,t management of construction programs.

HV/MV substation controlTalus

Main functions:t remote control,t HV and MV protection integration,t data and alarm logging,t centralized local control.

Industrial and building networksProtection, monitoring and controlIsis - Powerlogic SMSSepam - Circuit Monitor - Power Meter.

Main functions:t installation display,t real time access to protection and control units,t alarm management,t data analysis,t electricity consumption management,t power availability and quality,t protection functions,t web technology.

Schneider Electric 3

GM6

GM6 offerThree levels of components are available to protect, monitor and control themedium voltage switchboard:t A control and monitoring system interfaceable with a higher level system.

t Sepam: protection and control unit for each switchgear unit (or cubicle).

t GM6 units: medium voltage equipment comprising cubicles with breakingdevices, sensors, medium voltage connections and low voltage auxiliaries.

Pre-engineered and adaptable solutionsThe three levels of components may be provided to make up:t global solutions from the control centre to the MV switchgear,t partial solutions which include 1, 2 or 3 levels of components to fit into projects fornew substations and retrofitting, extending and revamping existing installations.

Servicest Equipment design, installation and maintenance.t Personnel training.t Electrical network availability studies.t 5-year extended warranty.


GM6 General presentationMain characteristicsof MV equipment

GM6 is indoor, metalclad switchgear designed for the MV section of HV/MVand MV/MV substations.GM6 is an important step forward from the point of view of personnel safety,operational reliability and reduction in the overall dimensions of equipment.GM6 units comply with the ENEL (Italian National Electricity Board), International(IEC) and European standards.GM6 range enables alla substation arrangements to be satisfied for system up to40,5kV.GM6’s design and functions take into account the three main categories of usersrequirements.t Investment Optimization and Profitability.t Service continuity.t Safety.

Investment Optimization and ProfitabilityThese are achieved through GM6 capability to meet all users requirements in themost cost-effective way possible.With GM6, the user benefits from:t the most compact equipment ever built in the medium voltage field, providingusers with a high degree of space savings when building or replacing a HV/MV orMV/MV substation,t pre-engineered solutions built upon the group’s worldwide experience andcollaboration with consultants and contractors, providing users with considerabletime savings when specifying needs,t the shortest delivery and installation time possible, providing users with fastcommissioning and quick return on investment,t a complete range of remote protection, control and monitoring functions whenrequested by users who want to set up a supervision system in order to optimizetheir energy supply.

Service continuityService continuity is achieved by means of GM6, which is a highly reliableequipment offering with all the required functions to provide users with maximumenergy availability and quality.With GM6, the user benefits from:t adoption of long proven technical solution; for instance, aluminium castings forthe gas-filled compartment enclosures have been used for many years in MAGRINIGALILEO gas-insulated high voltage equipment,t quality organization in accordance with the ISO 9001 (EN29001) issued fromCSQ, the official certification body in the electric field in Italy,t fully factory-tested equipment with type test reports (required by IEC standardsand ENEL specifications) available for each performance and type of cubicle,t negligible maintenance requirements, confined to simple periodical checks andpossible monitoring of all electrical data affecting the working condition ofequipment,t equipment that cannot be affected by humid, dusty, corrosive or pollutedoperating environments since all live parts are contained in SF6 filled and sealedenclosures,t a supervision offer open to all specifications regarding substation managementand enabling users to control and follow up their energy supply.

SafetyMaximum safety is achieved through GM6 design and functions.With GM6, the user benefits from:t a very comprehensive set of mechanical and electrical interlocks preventingoperator errors and compliant with the user’s security protocol,t internal arc withstand of all the functional units, validated in accordancewith IEC 60298, appendix AA, criteria 1 to 6, class A accessibility,t operations with reliable and clear signalling devices and direct visibility of thedisconnecting contacts,t high ratio between maximum withstand pressure for the gas-filled compartmentsand normal filling pressure,t pressure relief devices for exausting accidental excess internal pressure in orderto safeguard the operator,t earthing switch on the cable side provided with making capacity,t cable plug-in terminations housed in earthed metal shields, connectors to DIN47637 standards,t a temperature compensated pressure gauge (with alarm and signal contacts)complete with a dial which is adjusted according to the elevation above sea level,t voltage indicating devices located close to operating shaft of the earthing switchon the cable side.

INCOMER BUS COUPLER FEEDER 630 A


GM6

General characteristicsThe values below are given for normal operating conditions as definedin IEC 60298 and 60694.

Normal operating conditions, according to IEC 60694 for indoor switchgear (4)

t Ambient air temperature :y less than or equal to 40 °C,y less than or equal to 35 °C on average over a 24-hour period,y greater than or equal to -5 °C.

(1) two units in parallel, please consult us.(2) the short-circuit making current is equal to 2.5 times the short time current.(3) standard degree of protection, for other values, please consult us.(4) for different conditions, please consult us.(5) 31.5kA x 0.5 sec.(6) for 40,5 kV rated voltage, please consult us.(7) please, consult us.

StandardsGM6 units comply with the following standards:t IEC 298-694t ENEL (Italian National Eletricity Board) DY 0072t Italian Work Safety Regulationst U.K. Electrical Association approvat.All switches, devices and components included in the switchgear conform to therelevant IEC Standards.

rated voltage (kV) 24 36 (6)

rated insulation levelpower-frequency withstand voltage (kV) rms 50 70

lightning impulse withstand voltage (kV) imp 125 170

rated normal currentbusbar (A) 1250 1250

2500 25004000(7) 4000(7)

functional units (A) 630 6301250 12502500 25004000(1) 4000(1)

short time withstand current (kA/3 sec) (2) 25 25

31.5 31.5

short circuit breaking current (kA) 25 25

31.5 31.5

internal arc withstand (kA/1 sec) 25(5) 25(5)

standard degrees of protection (3)

SF6 filled compartment IP65 IP65

enclosure IP3X IP3X

internal partitions IP2XC IP2XC


GM6 Functional unitsDescription

GM6 switchgear is made up of interconnected functional units, available as single-busbar or double-busbar system. Each functional unit contains all the elementsneeded to perform its function:t a gas insulated, metalclad cubicle , for indoor use,t a circuit breaker using SF6 as a breaking medium, sealed for life,t a digital protection and control system.

Power connections are made between functional units by a busbar set locatedinside a SF6 compartment. Steady electrical continuity of all metal frames isensured by connection of each functional unit’s earthing busbar to the switchgear’smain earthing circuit.Low voltage compartments, for protection relay (front) and auxiliaryrelay-terminal board (rear) are provided.

CubicleThe cubicle is an earthed, metallic enclosure, gas insulated switchgear thatcomplies with the requirements of the IEC 60298 standard.

The cubicle comprises four electrically independent compartments.

The busbar compartment is separate and independent from the circuit breakercompartment, so that the circuit breaker can be replaced if necessary whilethe busbars are energized. An inspection window enables a visual check of theposition of the busbar disconnector blades. The compartment using SF6 asisolating medium, is situated in the top of the unit and it contains:t the main busbars,t the three-pole, two way busbar disconnector.

The circuit breaker compartment is composed of an alluminium housing filledwith SF6 and containing the circuit breaker poles.An inspection window enables a visual check of the position of the line isolator andearthing switch.The compartment is located in the central part of the cubicle and it contains:t the disconnectable circuit breaker,t the three-pole, two way line disconnector (only single busbar system),t the earthing switch,t the bushing for receiving plug-in cable terminations.

The MV connection compartment is situated in the bottom of the cubicle and itcontains:t the cable connection,t the current transformer,t the voltage transformer.

The Low Voltage compartments are separated from the Medium Voltage section;the first is located in the top of the unit and it contains protection and controlsystem, while the other are located on the back and contains the low voltageauxiliaries. Three basic cubicle lay-out are offered:t incoming or outgoing feeder AD1/AD2 ,t bus section CL1/CL2 and double busbar system ,t the busbar metering TT1.

Disconnectable circuit breakerThe circuit breaker SF1-G is designed in accordance with IEC 60056 standard andit complies with the definition of «pressure sealed systems» given in IEC 60056standard, appendix EE.It is of the puffer type and uses the SF6 gas as a breaking and isolating medium.The circuit breaker is maintenance free for life. In case of necessity it can bereplaced in short time because the main connections are made by sliding contacts.

Protection and control systemIt includes:t Sepam protection and monitoring unitt current transformerst voltage transformers


GM6

AD type functional unit (incomer and feeder)single busbar system

1 SF6 busbar compartment

2 busbar disconnector

3 SF6 circuit breaker

compartment

4 cable compartment

5 current transformer

6 voltage transformer


8 LV cubicles

9 MV plug-in connectors

10 line disconnector

11 earthing switch

12 inspection window

13 sliding contacts

AD type functional unit (incomer and feeder)double busbar system

OO

II

OO

II

3

4

3

4

5

5

6

3

5

6

3

3

4

5

OO

II

OO

II

3

4

3

4

5

5

6

3

5

6

3

3

4

5

OO

II

1

2

3

5

4

6

8

7

9

8

13

10

11

12

1

2

3

5

4

6

8

7

9

8

10

11

12

1 SF6 busbar compartment

2 busbar disconnector


compartment

4 cable compartment

5 current transformer

6 voltage transformer


8 LV cubicles

9 MV plug-in connectors

10 earthing switch

11 inspection window

12 sliding contacts


GM6 Functional unitsChoice Single Busbar System

The GM6 range is composed of 7 functional units . The chart below may be usedto link up needs and functional units, and it gives information on the generalcomposition of each unit.How to select: if the user wishes to supply power to a transformer, the solutionis a Transformer Feeder.The matching functional unit is therefore a TF, comprising an AD1 cubicleequipped with a disconnector switch , circuit breaker and a type T Sepam .

incomer feeder bus section busbar metering

line transformer line transformer capacitor switchboard meter / earthbusbar busbar busbar busbar busbardisconnector disconnector disconnector disconnector disconnector

circuit breaker circuit breaker circuit breaker circuit breaker circuit breaker circuit breaker

line disconnector line disconnector line disconnector line disconnector line disconnector line disconnector line disconnector

earthing switch earthing switch earthing switch earthing switch earthing switch earthing switch

LI TI LF TF CF B-S BB-SAD1 - AD2 AD1 - AD2 AD1 - AD2 AD1 - AD2 AD1 - AD2 CL1 - CL2 TT1

Sepam S Sepam T Sepam S Sepam T Sepam C Sepam B Sepam B

synoptic synoptic synoptic synoptic synoptic synoptic synoptic

current transformer / voltage transformer current transformer voltage transformer(only CL2)

lightningarresters

key locks key locks

FeederLF, TF, CF with AD1/AD2

IncomerLI, TI with AD1/AD2

Busbar meteringBB-S with TT1

Switchboard bus sectionBS with CL1/CL2


GM6

Switchboard bus sectionBS with CL1/CL2

The GM6 range is composed of 8 functional units . The chart below may be usedto link up needs and functional units, and it gives information on the generalcomposition of each unit.How to select: if the user wishes to supply power to a transformer, the solutionis a Transformer Feeder.The matching functional unit is therefore a TF, comprising an AD1 cubicleequipped with a disconnector switch , circuit breaker and a type T Sepam .

incomer feeder bus bus busbarsection coupler metering

line transformer line transformer capacitor switchboard switchboard meter / earthbusbar busbar busbar busbar busbar busbar busbar busbardisconnector disconnector disconnector disconnector disconnector disconnector disconnector disconnector

circuit breaker circuit breaker circuit breaker circuit breaker circuit breaker circuit breaker circuit breaker

earthing switch earthing switch earthing switch earthing switch earthing switch earthing switch

LI TI LF TF CF B-S B-C BB-SAD1 - AD2 AD1 - AD2 AD1 - AD2 AD1 - AD2 AD1 - AD2 CL1 - CL2(1) CT1-CT2 TT1(1)

Sepam S Sepam T Sepam S Sepam T Sepam C Sepam B Sepam B Sepam B

synoptic synoptic synoptic synoptic synoptic synoptic synoptic synoptic

current transformer / voltage transformer current current voltagetransformer transformer transformer(only CL2) (only CT2)

lightningarresters

key locks key locks

(1) use one unit for each busbar

Busbar couplerB-C with CT1/CT2

Busbar meteringBB-S with TT1

IncomerLI, TI with AD1/AD2

FeederLF, TF, CF with AD1/AD2

Functional unitsChoice Double Busbar System


GM6 Functional unitsDescription

Functional unit/cubicle correspondence chartThe chart below summarizes the electrical characteristics of each of the GM6functional units.The type of cubicle used for the function varies according to the characteristics.The name of the cubicle (AD1, CL2,...) is the name which appears on the GM6 testcertificates.How to read the chart:to create a “line incomer ” function, an LI functional unit is chosen.The incomer characteristics are:t Un = 24kV,t Isc = 25kA,t In = 2500A.

The cubicle used for this function is an AD2.

function 24 kV 36 kVline incomer LItransformer incomer TIswitchboard coupler SS

line feeder LFtransformer feeder TFcapacitor feeder CF

bus section B-S

bus coupler** B-C

busbar metering BB-S

kA

25

1250 2500 A

AD1 AD2

31,5kA

25

1250 2500 A

AD2

31,5

kA

25

1250 2500 A

CT1 CT2

31,5kA

25

1250 2500 A

CT2

31,5

kA

25

1250 2500 A

CL1 CL2

31,5

kA

25

1250 2500 A*

TT1

31,5kA

25

1250 2500 A*

TT1

31,5

kA

25

1250 2500 A

CL2

31,5

kA

25

1250 2500 A

AD1 AD2

31,5kA

25

1250 2500 A

AD2

31,5

* busbar current** only for double busbar system


GM6

Front views Side views Front viewsSide views

TT1

AD1AD1 AD2AD2

CL1 bus couplerCL1 CL1 bus section

CL2 bus couplerCL2 CL2 bus riser

TT1

Dimensions (mm) and approximate weights (kg)by type of cubicle

(*) without-with VTs(**) without CTs- min weight with 1 CT set- max weight with2 CTs sets(***) without-with CTs.

AD1 AD2 CL1 CL2 TT1width (mm) 500 700 1075 1475 500

height (mm) 2560

depth (mm) 1800-2200* 1800

weight (kg) 720-840* 1080-1260*

720-770-820** 1080-1130-1310**1700 1900-2000*** 700

If CTs are required, select CL2.


GM6


AD1AD1 AD2AD2

Functional unitsDescription

CL1-F bus sectionCL1-F CL1-F bus riser

CL1-R bus sectionCL1-R CL1-R bus riser

CL2-F CL2-F bus section CL2-F bus riser

4




GM6


CL2-R bus sectionCL2-R CL2-R bus riser

CT1 bus couplerCT1 CT2CT2 bus coupler

bus couplerCT2 with currenttransformers

bus riser

TT1-F TT1-F TT1-R TT1-R

Dimensions (mm) and approximate weights (kg)by type of cubicle

(*) without-with VTs(**) without CTs- min weight with 1 CT set- max weight

with 2 CTs sets(***) without-with CTs(****) dimensions also valid for CT2 with CTs.

AD1 AD2 CL1 CL2 (****) TT1width (mm) 500 700 1075 1475 500

height (mm) 2560

depth (mm) 1800-2200* 1800

weight (kg) 875-995* 1295-1475*

875-925-975** 1295-1345-1525**1855 2115-2215*** 855

If CTs arerequired,select CT2with currenttransformers.


GM6 Protection monitoring and controlSwitchboard monitoring and control

GM6 supervision systemGM6 can be provided with a user’s customized supervision system designed tocontrol and monitor GM6 switchboards.The use of a supervision system is a key factor in the improvement of the qualityof service :t efficiency in daily use and operations thanks to a user friendly user interface,t continuity of service by fast intervention provided by remote control of the GM6,t understanding and analysis of events and loads.

User-friendly and dependable operator interfaceThe operator interface of a GM6 supervision system is designed to be usedby electricians.The ergonomics is intuitive, making the system easy to understand and use.

ArchitectureThe user terminal consists of a compatible personal computer.It is directly connected to the Sepam protection units via a standard communicationbus.The control station can easily be connected to a higher level monitoringand control system.

Basic functionsThe main functions are:t installation display by chained mimic diagrams(animated single line diagram, device position, energized parts, current faults…),t continuity of service by fast intervention provided by remote control of the GM6,t understanding and analysis of events and loads.


GM6

GM6 switchboard: protection monitoring and control unitSepam is a range of digital monitoring protection and control units.Sepam is at the centre of protection, monitoring and control system for GM6functional units: all the necessary protection, metering, control, monitoring andsignalling functions are carried out by Sepam .Sepam has a range of units defined to provide an optimal solution for a eachapplication, and includes:t Sepam S , sub-station incomer and feedert Sepam B , bus sectioningt Sepam T , transformer feedert Sepam M , motor feedert Sepam C , capacitor feedert Sepam G , generator feeder

The Sepam range hinges around 2 functional and hardware bases:t Sepam 2000 , focused on performance, covers all GM6 functional applicationst Sepam 1000+, simple and modular, offers an optimezed solution for mostcommon applications.

Sepam advantagesSepam, a digital multi-functional protection unit, provides you with the followingadvantages:t simple to use for better dayly efficiency: use-machine interface (UMI) whichis ergonomic and which provides comprehensive and clear information to operatorst simple to incorporate: flexibility and user friendliness of parameter settingsoftware, simplified testst money saving:v integrating all functions required in one single, ready to use productv upgradable solution, to spread the cost of investment over timet centralized GM6 switchboard management:v Sepam is easily integrated into all network control systems, due to its Modbuscommunication interfacev all data required for installation monitoring and control are accessible throughthe Modbus communicationt better network knowledge through the oscillo-disturbance recording functionand measurement of the imbalance ratio, motor operation parameters, etc.:t improving continuity of servicev through effective preventive equipment maintenance using switchgear diagnosisfunctions: time and number of operations, sum of breaking currents A2, etc.v through clear and comprehensive information, both locally and remotely, reducingthe time needed to act in the event of a fault.

MERLIN GERIN

A V/Hz W/ϕ clear reset

I on trip

alarmWh

O off

MERLIN GERIN


I on trip

alarmWh

O off

MERLIN GERIN


I on trip

alarmWh

O off

MERLIN GERIN


I on trip

alarmWh

O off

MERLIN GERIN


I on trip

alarmWh

O off

MERLIN GERIN


I on trip

alarmWh

O off

to remotecontrol centre


GM6 Protection monitoring and controlFunctional unit protection

Protection and control solutionEach GM6 functional unit is equipped with a protection and control solution suitablefor the function to be performed.The solution comprises :t a Sepam Protection and Control unit(1) suited to the needs,t toroidal current transformers ,t voltage transformers ,t low voltage auxiliaries : test blocks, auxiliary contacts, terminal blocks ...t low voltage outlets for connection to the switching device.

(1) or any other combination of relays, automation devices, measurements and meteringapparatus.

Sepam 2000, for all applicationsThe Sepam 2000 range of digital protection, monitoring and control units providesa comprehensive solution for all applications:sub-station, busbar, transformer and motor, as well as generators and capacitors.Different types of Sepam 2000 are proposed for each type of equipment to beprotected. For example, there are 30 different types of Sepam 2000 dedicatedto protection, monitoring and control of transformers.Each Sepam 2000 is an optimized solution, designed to provide an exact responseto the actual requirements of a functional application, including all the requiredfunctions ready to use.Focused on performance, Sepam 2000 includes the following functions:t metering functions: measurement of current and voltage, measurement of powerand active and reactive energy, etc.t protection functions: directional phase and earthing protection, differentialtransformer or machine protection, etc.t monitoring and control functions: in its function as a programmable logicalcontroller, Sepam 2000 is pre-programmed to carry out standard monitoring andcontrol functions, and can be re programmed to handle any specific automaticcontrol function!

Sepam 1000 +, for the most common applicationsSepam 1000+ is a new range of protection, monitoring and control units which areboth cost-effective and high performance.Sepam 1000+, a simple solution:t a lean catalogue adapted to the following typical applications: line incomersand feeders, transformers, motors and busbars,t ready to use, with integrated settable breaking device control,t ergonomic user-machine interface (UMI) for intuitive use

Sepam 1000+, a modular solution.

To adapt to increasing numbers of applications, and to allow the installation to beupgraded at a later date:t choice between 2 user-machine interfaces (UMI): a basic UMI, or an advancedUMI with graphic LCD screen and keypad. The advanced UMI can be remotelylocated and its screens can be customized in all languages.t functional enhancement with optional additional modules: on / off input / output,Modbus communication network connection interface, acquisition module for 8temperature probes or low level analogue output module (4-20 mA).

For detailed information, see catalogues (Sepam Encyclopædia on CD ROM).


Protection monitoring and controlCurrent and voltage transformers

In the protection system, the functional units are fitted with transformers designedto supply the measurements and/or protection circuits:t current transformers,t voltage transformers,

The active parts are totally encapsulated in an integral epoxy resin moldingwhich serves a dual function:t it ensures electrical insulation,t it guarantees the assembly an excellent mechanical resistance.

Current transformersAD1 and AD2 unitsARC, AOL, AOPC and ARL (see table on page 24) type toroidal-core currenttransformers, located in the cable compartment. The toroidal core accommodatesthe secondary windings, the cable is the primary winding.The transformers have primary current values of 50A to 2500A and secondarycurrent 1A or 5A.

CL2 unitARO type toroidal-core current transformers, located in the bus-section unit.The transformers have primary current values of 50A to 2500A and secondarycurrent 1A or 5A.Schneider has a standardized list of CTs that are appropriate for use with digitalprotections to simplify the determination of accuracy characteristics.This list is available on request.

Voltage transformerTT1 unitVRT type metal shielded voltage transformers, located in the cable compartment.They have one insulated MV end with plug-in connector, for connection betweenneutral and phase conductors in 3-phase systems.The cores and windings are overcast in epoxy resin, providing electrical insulation.The external surface is metal shielded.

AOPC type

VRT type

ARO type


GM6 ApparatusSF1-G circuit breaker up to 36 kV

SF1-G circuit breakert The SF1-G circuit breakers are of the “puffer“ type and use SF6 gasas a breaking and insulating medium.They are composed of three poles mounted on a base which supportsthe operating mechanism. Acording to IEC 56 App. EE (1987), the circuit breakeris defined as a sealed pressure system, that is an assembly for which no furthergas processing is required during its expected operating life.t The fundamental feature of the circuit breaker- essential for the very conceptof a fully gas insulated switchgear- is its very high dependability which means:v high reliability,v long mechanical life: the circuit breakers are designed for 10000 mechanicaloperations with no need to replace parts with only ordinary maintenance of theoperating mechanism,v long electrical life: the capacity of breaking load and short circuit current is muchhigher than it is normally required in 30years of operational life. The circuit breakerscomply for the electrical endurance life whit Table IV of the ENEL (Italian NationalElectricity Board) specification DY 1702 and IEC 56.v no need for any maintenance on the active parts,v manufactured under a fully quality assurance program.

Puffer type: operating principleThe main contacts and arcing contacts are initially closed (fig 1) .Precompression (fig 2)When the contacts begin to open, the piston slightly compresses the SF6 gasin the pressure chamber.Arcing period (fig 3)The arc strikes between the arcing contacts. The piston continues its downwardmovement.A small quantity of gas, directed by the insulating nozzle, is injected across the arc.For the breaking of low currents, the arc is cooled by forced convection.However, for high currents, thermal expansion causes the hot gases to movetoward the colder parts of the pole unit.The distance between the two arcing contacts becomes sufficient for the currentto be broken when it reaches the zero point, due to the dielectric properties of SF6.Sweeping overstroke (fig 4)The moving parts finish their movement and the injection of cold gas continues untilthe contacts are completely open.

fig. 3 fig. 4

fig. 1 fig. 2


GM6

Characteristics of circuit breakersin GM6 GIS electrical characteristics SF1-Grated voltage kV, 50/60 Hz 24 36

insulation level kV, rms 50 Hz - 1 mn 50 70

kV, 1.2/50 µs impulse 125 170

rated normal current A 630 t t

1250 t t

2500 t t

4000 t* t*

short circuit breaking current kA, rms 25 2531,5 31,5

short circuit current kA, peak 63 6380 80

short-time withstand current kA, rms 3s 25 2531,5 31,5

capacitor breaking current A =630 530 530

for rated current >630 875 630

rated operating sequence O-0.3s-CO-30s-CO t t

O-0.3s-CO-3min-CO t t

approximate operating time ms opening 40-60 40-60

breaking 50-70 50-70

closing 50-70 50-70

* 2 circuit breakers in parallel.

Circuit breakerThe circuit breakers in the SF1-G range use SF6 for insulation and currentbreaking. They are composed of three poles mounted on a base which supportsthe operating mechanism. Acording to IEC 56 App. EE (1987), the circuit breakeris defined as a sealed pressure system, that is an assembly for which no furthergas processing is required during its expected operating life.t The fundamental feature of the circuit breaker- essential for the very conceptof a fully gas insulated switchgear- is its extremaly high dependability which means:v high reliabilityv long mechanical life: the circuit breakers are designed for 10000 mechanicaloperation with no need to raplace parts with only ordinary maintenance of theoperating mechanismv long electrical life: the capacity of breaking load and short circuit current is muchhigher than it is normally required in 30years of operational life. by way of example,the circuit breakers are guaranteed for the elctrical duration defined by Table IVof the ENEL (Italian National Electricity Board) specification DY 1702.v no need for any maintenance on the active partsv manufactured under a fully quality assurance program.

main switching featuresv low overvoltages when breaking small inductive currentsv suitable for rapid autoreclosing dutyv suitable for switching capacitor banks

standardsthe indicated features are referred to the following standards and specifications:IEC 56 and 694 International StandardsENEL DY 1701-707 specifications

operating timest opening time (interval of time between the instant of energizing the openingrelease and the instant when the arcing contacts have separated in all poles):40 to 60 mst break time (interval of time between the instant of energizing the opening releaseand the instant when the arc extinguishes in all poles): 50 to 70 mst closing time (interval of time between energizing the closing circuit and theinstant when the contacts touch in all poles): 50 to 70 ms

operating sequenceConsult our technical department for other operating sequences.


GM6 ApparatusGMh operating mechanism

GMh operating mechanismSF1-G range circuit breakers are actuated by a GMh operating mechanism thatensures switching device closing and opening speed that is independent of theoperator.Circuit breakers equipped with a GMh electrical operating mechanism can performremote control functions and implement reclosing cycles.

A GMh electrical operating mechanism includes:t a spring system that stores the energy needed to close and open the breaker,t a manual spring charging system,t an electrical motor spring charging device that automatically rechargesthe mechanism as soon as the contacts close (time i 5 s),t two mechanical push-buttons on the front panel for opening and closing,t an electrical closing system including:v a closing release for remote control and an anti-pumping relay.t an electrical “opening” release system featuring one or more releasesof the following types:v shunt,v undervoltage,v low power-consuming mitop*,t operation counter,t an optional “operating mechanism charged“ indication contact,t an end-of-charging contact,t a black and white mechanical “open-closed” position indicator,t a multi-pin connector for isolating auxiliary circuits in the “disconnected“ position.Auxiliary contactsThe GMh operating mechanism is equipped with a block of 15 auxiliary contacts,including:t 1 changeover contact for the electrical operating mechanism,t 1 changeover contact for indication,t 1 changeover contact for the shunt release.The number of available contacts depends on the composition of the operatingmechanism and the options chosen. In any case the minimum available contact are7 (4NC - 3NO).

* mitop: current-operated release used as an option with the Sepam 100 LA protection relay.

rated current 10 A

breaking AC 10 A with 220Vcapacity (p.f. u 0.3)

DC 1.5 A with 110 or 220V(L/R i 0.01 s)

type of auxiliaries spring closing opening releasecharging release shunt under- Mitopmotor single double voltage

supply voltage AC (V) 50 Hz 48 -110 - 220

60 Hz 120 - 240

DC (V) 24 - 48 - 60 - 110 - 125 - 220

consumption AC (VA) 500 100 100 200 400/90**

DC (W) 500 70 70 140 100/10** 7

possible combinations = + + + + +

of auxiliaries t 1 t 1 t 1

and quantities or t 1 t 1 t 1 t 1

or t 1 t 1 t 1

or t 1 t 1 t 1 t 1

or t 1 t 1 t 1

or t 1 t 1 t 1 t 1

or t 1 t 1 t 1 t 1

or t 1 t 1

** pick-up/hold consumption.

GMh operating mechanism characteristics


GM6 ApparatusAuxiliary diagram

Auxiliary diagramGMh circuit breaker operating mechanism

SP1

SP2

Sm2

Sm3

Sm1

Sn

KN

Y01

YMM2

YF

Q

M1

M

QF

MitopY02

SM

SE

M3

SC

KN Anti-pumping relay.M Spring charging motor.M3 “Operating mechanism charged” indication.Mitop “Mitop” operating release (current-operated).Q Circuit breaker.QF Circuit breaker auxiliary contacts.SE Latch checkSM Manual charging operation in progress.M1-M2 End-of-charging contacts.Sm1 Closing push button (outside).Sm2 Opening push button for shunt trip release

(outside).Sm3 Opening push button for undervoltage release

(outside).Sn Closing disable contact (outside).SP1 Pressure-switch contact first level.SP2 Pressure-switch contact second level.YF Closing release.YM Undervoltage opening release.Y01-Y02 Shunt opening releases.SC Busbar to earth indication.


GM6 InstallationCable terminations

An addictional bushing to DIN 47637 can be provided on request for connecting a voltagetransformer per phase.

(1) cable cross sectiont for size 1 terminations: from 25 to 240 mm2

t for size 3 terminations: from 150 to 630 mm2

(2) type ARC2 with only 1 cable per phase(3) type ARL4 with 3 cables per phase

4 cables per phasewith ARL5 CT type+ VT connection

3 cables per phasewith ARL4 CT type

2 cables per phase withAOPC CT type

2 cables per phasewith AOL CT type

AD2 AD2

AD2 AD1

rated unit short max n ° of cables max n ° of CTvoltage rated circuit

current currentper phase (1) per phase

kV A kA size 1 size 3 and type12-24 630 25 1 2 x ARC2

12-24 630 25 2 2 x AOL2 (2)

12-24 1250 25 2 2 x AOL2

12-36 1250/1600 31.5 2 2 x AOPC

12-36 2000 31.5 3 2 x ARL4

12-36 2500 31.5 4 2 x ARL5 (3)

The switchgear is designed for the use of plug-in terminations accordingto DIN 47637 specifications.It is possible to connect up to four cables (1/3-core cable) for each phase witha max. cable cross-section up to 630 mm2.In order to simplify the assembly and cable-testing work, the height of theconnection point is more than 700 mm.

Type of cable terminations (only for reference):


GM6 InstallationExample of layout

Line-up switchgear(two supply cubicles and one bus section 36 kV 2500 A)

Civil engineering with utilities space(1) up to 1200 mm if requested(2) distance needed to extract a functional unit from the switchboard without

moving the other units(3) minimum distance (mm)(4) minimum distance (mm), according to the cables bending radius(5) the switchboard where internal arc protection is required, please consult us.

For further details, please refer to the civil engineering manual.

2 feeders 1250 A or 2500 A

incomer 1250A with VT

busbar transformer

bus section 2500 A

busbar transformer

700500

800

1800

1600

4200

7675

50

incomer 2500A with VT

2 feeders 1250 A or 2500 A

700 700 700 700 70050

500 5001475

800(3)

1600(1)- 2000(2)

280 800

1200

(4)

2700

3200

(5)


GM6 EnvironmentPreserving the environment

The Schneider recycling procedureThe Schneider recycling procedure forSF6 based products is subject to rigorousmanagement, and allows each device tobe traced through to its final destruction.

Within the framework of the group’s environmental policy, Schneider serviceshas made an operational procedure available, enabling medium voltage switchgearto be processed while eliminating any release of SF6 into the atmosphere.To help you to protect the environment, and to take care of your storage ordismantling concerns, Schneider services offers to recover any of your equipmentthat is reaching the end of its service life.The GM6 has been designed with environmental protection in mind:c the insulating and conducting materials that are used are identified,easy to separate, and recyclable,c SF6 can be recovered at the end of its life, and reused after treatment.

As standards, specifications and designs change from time totime, please ask for confirmation of the information given in thispublication.

1-0501-4A

Schneider Electric S.p.A. Circonvallazione Est, 124040 Stezzano (BG)Tel. (035) 4151111Tfax (035) 4153200

LEES CA M 321 B E

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GM6 MV Gas Insulated Switchgear up to 36 kV · With GM6, the user benefits from: ... An inspection...

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