2d Hv Schneider El Training 379

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Safety

Training Documents

05-2009



SAFETY / 08.09 Illicit reproduction

Table of contents

Introduction

Electrical damages

Direct and indirect contact

During intervention

Causes of Electrical Accidents




Your electrical job would be easier if…..

Your body was made of insulating materielbut unfortunately it is conducting electricity !!

so, submitted to voltage, it will be crossed over by current

Your body was made of fire resistant material,

but unfortunately it burns !!

So, close by electrical arcs, it will be damaged

Your body was mechanically not vulnerable,

but it is a fragile machine

that cannot withstand violent mechanical stress

So the unique solution for youis to take care.take care. After After it will be too late




Basic precautions

No repairs or alteration should be carried out on any live equipment except where completedisconnection is not practicable

No one should work on any live equipment unless protected by approved protective

equipment or insulating devices

Adequate precaution, such as locks on circuit breakers or switches, warning notices,

sentries...must be taken to prevent electrical equipment from being electrically charged whenwork is being done

Caution : Violations of these recommendations Always lead to electrical accidents




Current flow

trough body

Arc proximity

or contact

MechanicalMechanical

stimulationstimulation

Internal burnsInternal burns

& failures& failures

ExternalExternal

burnsburns

• Muscles contractions•

Lungs blocked• Heart ventricular de-synchronization

• Members and crossed body flesh• Venous system• Kidneys and urinary system• Brain• Blood circuits (internal Haemorrhage)

• Flame burns (variable depth)• UV's radiation burns (eyes, skin)• Projection of burning fused material

Others

MovementsMovements

Fire escapingFire escaping

• projection of objects during explosions• Unexpected starts or stops• Falling down or backwards or from ladders

•Toxic gases released (respiratory system)ChemicalChemical

• Burns due to new fire in building

Main risks, according to Accident type




Your body is conducting electricity…

Below 50 Volts skin impedance remains effective (approx 2000Ω )

Total impedance 2500 Ω approximately 50V / 2500Ω = 20 mA = safe

The skin resistance varies:

• it increases with the thickness of the keratinous layer

• it decreases with the contact surface, pressure, hydration, duration and voltage

Above 100Volts skin becomes fully conductive (flashed dielectric)

Remaining impedance: internal body only 650Ω 100V / 650Ω = 150 mA

Trip

Internal bodyInternal body

average 650average 650 ΩΩ

(300 to 700Ω)(300 to 700Ω)

VOLTAGEVOLTAGE

appliedapplied

betweenbetween

2 body points2 body points

Skin

Less than 100V

dielectric

withstand




50000v

75000vH T B

H T A

B T B

B T A

T B T

1000v

500v

50v

1500v

750v

120v

Voltages classification

( 14-11-1988 edition)

Alternative current Continuous current




Features of the body according to

current level crossing through

Current flowing trough body

Cardiac arrest

Irreversible cardiac fibrillation threshold

Respiratory paralysis threshold

Non-release threshold, muscle contraction

Perception threshold, very weak sensation

1 A

75 mA

30 mA

10 mA

0.5 mA

For average size person, and AC 50 Hz current




During how long can we safely withstand

current flowing trough body Zone 3 and 4 are dangerous,

out of zone 1 and 2, circuit feeder should trip within time limits

Current

passage

time t

10.000

5.000

2.000

1.000

500

200

100

50

20

10

100.1 0.2 0.5mA 1 2 53030

100 200 1000 2000 5000 10A

mA

ms

1 2 3 4

Current flow through body(from left hand down to feet)

20 50 500IEC 60479-1

2005

300300

N o R

e a c t i o n

N o D a n g e

r o u s E

f f e c t

R i s k o f t e m p o r a r y c a r d i a c a r r e s t

R i s k o f i r r e v e r s i b l e d a m a g e s o r a r r e s t




Internal damages from electric shock

Conducted electricity trough body parts will

Disturb or alter internal control signals from nervous system

Energise wrong muscles, including vital ones, such as heart

Burn body internal organs and tissues crossed,

by impossibility to evacuate the heat generated




Body reactions during, and soon after,

electrical shock Muscles

Flexing >> impossible to release contact with live parts

Extensing >> backwards projection of body, >> induced wounds

Lungs

Tetanisation of breathing muscles >> fatal suffocation if persisting

Heart

Fibrillation and heart stop heavy probability

only safe remedy: 48h under tight control

Kidneys and Myoglobin

When muscle is damaged, the myoglobin is released into the bloodstream. In large quantities,

myoglobin can damage the kidney




And some secondary reactions

later after shock Fatal risk, if not under control

Late Ventricular fibrillation (can occur and be fatal, at any moment within 48H after shock)

only safe remedy: 48h under tight control

These secondary effects are more critical to detect,

but should also lead to medical examination

when occurring after an electrical accident

Skin problems

Impaired earrings

Dizziness

Insomnia

Depression

Psychic troubles

Memory loss




External damages due to Electrical Arc

Electrical arc temperature can reach 15000 to 35000 °C

Electrical Arc will thus

Externally burn tissues by flame overheat

Burn by UV radiation

Project parts or fused material (at speeds nearing 400 Km per hour)

Generate blasts from hot gases overpressure.• The high pressures generated by an Arc blast can knock workers

Secondary effects can include later ocular problems




Burns from LV short circuits arcs ….!

On DummyOn Dummy

plastic faceplastic face

modelmodel

On real face, with safety goggles onlyOn real face, with safety goggles only




Accidents with MV most of the time cumulate

shock and electric arc

Before physical contact is reached, voltage is flashing over

between body point and live circuits

Arc is generated, and may further develop between phases

Massive current flow is going through operator body

due to high voltage compared to unchanged body

impedance

Damages are often both internal and external

Electric arc (direct on body) Is usually fatal.

It can be identified

from small surface deep perforation

Thunder spike on foot Thunder spike on foot




HV or MV ARC IMPACTS

In Hand In Hand On Leg On Leg

On Foot On Foot

On Shoulder On Shoulder





Electrically shocked by direct contact between two live parts:

• contact with an energized live part (direct contact)

+ contact with another energized live part (direct contact).

Frequent

Ph or N

Ph

No possible

Protection !!!

If no earth leakage




N

12

3


Electrically shocked between a live part and earth

Contact with an energized live part (direct contact)

+ earth or earthed conductive part or an earthed phase

Very frequent




Obstacles

IP2X

or IPXXB

Protection against DIRECT contacts

Separation by distance

Separation by barriers, screen or insulation

Distance

≥ 3m if service voltage < 57kV≥ 5m if service voltage ≥ 57kV

Insulation (LV)




Protection against DIRECT contacts

(LV only)

Separation by a class II electrical equipment

Service voltage reduced down to safety voltage

Quick disconnection of supply if earth fault detected

(high sensivity RCD's)

Class II

SAFETY ELV< 50 V

SAFETY ELV Transformer

30 mA

Very fast trip





Electrically shocked by contact with an accidentally energized conductive part+ contact with another accidentally energized conductive part.

Very rare

N

12

3





Electrically shocked by contact with an accidentally energized live part (indirect contact)

+ earth or earthed conductive part or an earthed exposed conductive part.

Less and less frequent

N

1

23V

R

IxR=U




Protection against INDIRECT contacts

Protection by automatic interruption of the power supply

Earthing of all exposed conductive parts of electrical equipment and all accessible other

conductive parts

Two simultaneously accessible exposed conductive parts must be connected to the same

earth terminal

Automatic de-energizing of the faulty machine by a protection device

(according to the earthing system choice)

The protective device must operate with a compatible time




Apart from any intervention

Maintenance engineers and management should make sure that proper danger and aid

signalling is visibly installed, warning in understandable language




During intervention

Risk is waiting for you, wear your PPE and use safety gear




For a safe intervention,

You need (personal)

Adequate professional electricity knowledge

Adequate specific site activity safety training & habilitation

Adequate electrical safety training and habilitation

To be briefed about specific site organization, hazards, and safety instructions

by local safety officer

To have available with you, your general work-sites basic PPE

safety helmet, shoes, glasses…and your specific "electrician" PPE

special facial shield, special gloves, locks, signs,…..

And personal safety tools, such as insulated hand tools, LV voltage detectors…




How to avoid electrical accidents ?

You also need, or supply if missing, (common means to be available on site)

Kit of common electric safety tools and agreed means according to service voltage range

• MV substations:

rescue sticks, voltage detectors, maneuvering insulated stick, insulating platform

• LV installations

insulating mats, short-circuiting and earthing systems

• Common

warning signs, safety lamps…




How to avoid electrical accidents ?

By observing simple electrical safety rules directed by common sense

Even if working practices are different from a country to another, GOLDEN RULES always apply.

By using simple, light and reliable electrical safety equipment




Golden rules, before dead line intervention

1 . Select adequate equipment 2 . Separate work area from

any voltage supply

3 . Lock out in open position

all possible links to supply

4. Check absence of voltage

on each conductor

5. Short-circuit and earth

every active conductor

6. Tag out , warn others

and limit work place




MV Personnel Protective Equipment

26,5kV Maxi

26,5kV Maxi

20kV

17kV Maxi




MV Safety Tools and equipment

45kV Maxi

24 or 40kV Maxi

45kV Maxi

outdoor




MV Safety Tools and equipment 2

detector

Comparator




Open air switchgear in indoor substation with

accessible bare terminals




Metal enclosed switchgear substation

with plug-in insulated terminals




Accident = Negligted behaviour

some or many safety steps are by-passed




You are professionals…..!!

You should know….!!

After it will be too late !




from following RCA's,from following RCA's,

get used to detect, and efficiently get used to detect, and efficiently

fight fight the wrong behavioursthe wrong behaviours

leading to accidentsleading to accidents




Analysis of causes of accidents (1)

Analysis of approximately 100 electrical accidents on LV installations,

over a period of 15 years, shows the following split:

See dangerous

Panels on next pages

Field locationField location indoor workshops 45 %45 % construction works sites 10 % (except frequent contacts with overhead LV or MV lines) others 35 % not specified 10 %

Equipment involvedEquipment involved With insulation faults Except insulation faults feeders 10 % 12% machines, loads, tools, 45 % 36% panels, enclosures, sockets 45 %45 % 52%52%

Type of occupationType of occupation installation, modification, renovation 23 %

troubleshooting 42 %42 % cleaning (electrical parts) 2 %

non-electrical work 30 % not specified 3 %




Causes of accidents analyses

Qualifications of injured personnelQualifications of injured personnel sufficient qualifications 50 % Most part of victims have sufficient qualification !!! insufficient qualifications 20 % qualifications unrelated to the accident30 %

Consequences of the accidentConsequences of the accident death 32 %

burns 42 % electric shocks 36 %

Type of contactType of contact direct contact 45 % Contact with live conductors or parts indirect contact 20 % contact with machines under insulation fault

short-circuit 30 % short circuit generated during works not specified 5 %




EXAMPLE OFEXAMPLE OFDANGEROUSDANGEROUS

PANELPANEL

TO ELIMINATETO ELIMINATE(Chillers power (Chillers power

and control)and control)




Yes, it runs…!!Yes, it runs…!!




Time to thinkTime to thinkto a newto a new

board….board….

Or a newOr a new

electrician ??electrician ??

W th d d




Wrong methods, wrong end

Deadly shock from bare feeders of overhead crane

An electrician, in charge of replacing a rolling contact wheel on a400V LV overhead crane, climbs up on the metal beam supporting

the crane track, with the intention of carrying out a quick repair without switching off the feeding line and with no gloves on.

By lack of attention, one of his hands comes in contact with one of the line conductors while his feet are resting on the beam.

Stuck between line and beam, the worker will be found deadwhen the rescue team will finally reach him.

Since the overhead crane track was earthed, the worker wassubjected to a difference of potential, by direct contact between hand

and feet, of 400/ √3 = 230 V.

ÌLessonThis job should have been done with power line off since no workshould be done with the power on, unless the operating conditions

make it dangerous or impossible to switch power off or if the nature of the work calls for power.

In addition, ahead the power line , there should be a device able toswitch off all the poles and to be locked in the open position, allowingwork to be done with the power off without any risk of inadvertent re-

energizing.

W j b




Wrong gear, major burnsMeasuring instrument in poor condition

While picking a voltage measurement in the control panel of a machine usinghis multimeter , the electrical repairman triggers a flash.

His hand and face are burned.

During inquiry, it is observed that the test probes, delivered with themultimeter at the origin, had been replaced by others, made locally,

and stripped along several millimeters.

When trying to reach one phase on a line contactor, the worker shorted twoenergized power phases terminals, with one of the stripped probes, causing

phase-to-phase powerfull short-circuit.

ÌLessonThe equipment used was inappropriate or in poor condition: the test probesshould have been insulated along the entire length except one or two

millimeters at tips level.

Protection equipment was not worn ( gloves, facial screen,..)

N.B.Several similar accidents occur due to:

poor condition of multimeters cords,worn-out insulation of connectors: probes, clamps, plugs, etc...

Particular care must be paid to maintain measuring instrumentsand accessories in perfect condition.

The use of retractable type test probes is compulsory.

Never approach bare MV or HV




Never approach bare MV or HV

A company is repairing metal pipes on an outdoor site.Pipes are stored 80 m away from the running work place trenches,

A worker is leading by hand the loads moved by a mobile crane on rubber tires.When the boom is fully raised and reasonably vertical, it's 7 m high above ground.

Between pipes storage and work place, a live 50 kV overhead line crosses the crane'spath.

The lowest wire of the line is 8 m high above ground.To improve the stability of the moving crane, the hoist operator is driving the vehicle with

the boom as vertical as possible, even though he could have carried these loads with

lowered boom, such as maximum height could have been limited to 5 m above ground.

Due to holes and hips of the track, the boom bounces and comes within 0.5 m from thelowest line wire.

A double flashover occurs, one between boom and overhead line, and the other between ground and suspended load, through the flashed body of the worker guiding

the load on the ground.

The worker is thrown away on the ground,his dry clothes catch fire. Very heavily burned, he dies soon afterwards...

Exposed between hand and feet to a voltage of 50 kV/√3the walking worker was electrocuted internally and burned externally,

no survival chance left.

(safety distances 3 m below 57kV service voltage, and 5m above)

So don’t forget!




Wrong methods, wrong endWhich one will you be ??

So don t forget!




Thank you for your participation

Join us to build a new electric world *

And

* Merci pour votre participation et rejoignez nous pour construire un nouveau monde électrique.

Training MCset



Training MCset

Table of contents



Schneider Electric Training

Overview of Mcset Mcset range

Measuring transformers for Mcset

Withdrawable parts

Circuit breaker LF1, 2 and 3

Circuit breaker SF1 and 2 Circuit breaker Evolis

Contactor Rollarc

Switch DI

MCset safety systems

MCset operating and main maintenance

procedures

Earth saving

Table of contents

Description




MCset works with SF6 gas technology or vacuum

All products comply with communication

protocols : Modbus, Ethernet…

Every switchgears is drawable

MCset ensures you An easy installation

A complete safe system Easy to operate and maintain

Reduced maintenance

MCset is a switchgear in metal clad enclosure designed to produce the mediumvoltage of a high power substation up to 24 KV

Description

Overview of MCset




Bus bar

Low voltage control cabinet

Voltage transformer compartment

Cables connections

Current transformer

Withdrawable part(circuit breaker)

Sepam

Evolution of MCset




Belledone Fluair Venus MCset

1958 1980 1987 1996

Cubicle for all functions




VPIS system(Voltage Presence indicator System)




Pluggable device of 3 lights and capacitor divider

Indicate the presence of tension on

incoming cable (for incomer) or outlet cable(

feeder)

Synchro check

With or without fuses

(Voltage Presence indicator System)

Mcset current and voltage ranges




g g

MCset technical characteristics




Mcset dimensions cubicles




Protection and remote control




●Sepam relay insure itself measure,control monitoring and protection.

●Power Logic (SMS) program allowed

complete remote control of an

installation by PC computer

●MCset switchboards can also be

integrated in an other supervision

system.

MCset range



MCset range

AD type : incomer / feeder




1- Busbar for cubicles interconnections

2 -Withdrawable part (circuit breaker, contactor /fuse or

disconnector switch/fuse)

3 -input/output connection box

4-Earthing switch

5-Current sensor

6-Voltage transformer (with fuse in option)

7-Low voltage auxiliaries (protection, monitoring and

control)

CL-GL type: bus-coupler / bus-riser




CL-GL type





2 -Withdrawable part (circuit breaker, disconnector or

earthing )

3 -Current sensor

4-Voltage transformer (with fuse in option)

5-Low voltage auxiliaries (protection, monitoring andcontrol)

TT type : Metering and busbar earthing




1- Busbars for cubicles interconnections

2 -Earthing switch

3 -Voltage transformers


control)

DI type : Switch fused feeder





2 -Switch and earthing switch

3 -MV fuses


control)

Functional unit type




●MCset range is composed of 13 different functional cubicles

●The table below indicates the different functions depending on the need

Functional unit type




For example : to supply a motor with a circuit breaker

The cubicle will be MF-B in an AD case

Measuring transformers



g

Measuring transformers for MCset




SEPAM

Current transformers or LPCT

Toroid (earth fault)

Voltage transformers

Current transformers




●Measuring CT :● Good accuracy close to nominal current

● Design to protect measuring devices (by saturation)

●Protection CT● Good accuracy for high current

● Wide range (tripping threshold)

●One, two or three secondary(s)● Primary current from 50 to 2500 A

● Be careful of the direction between P1-P2 and S1-S2(according to the drawing)

Linear Zone

(no saturation)

Medium zone

Saturated zone

Protection CT features




● Accuracy class

● measuring : 0,2; 0,5 or 1

● protection : 5 or 10

● Accuracy limit factor ● Ratio higher precise current / nominal current

● 10; 15; 20 or 30

600/5 A, 15 VA, 5P 10

Primary current

Secondary current

power(precision) Accuracy class

Accuracy limit factor

CT wiring




This wiring not allowed residual

current measurement

Recommended Io minimum threshold:

-0,30 In CT with DT curve-0,10 In CT with IDMT curve

(or DT and H2 restraint )

LPCT (Low power current transformer )




Secondary winding

Primairy

Integrated shunt

Twisted cable with screen

RJ45 plug

• New technology due to electronic relay

low consumption

• Wide operation range

(ex: 5A - 1250 A)

• 2 functions: measurement and

protection

• Accuracy guaranteed up to short circuit

(no saturation)

• Directly connected to Sepam

Toroid CSH 120 and 200




●Current transformer for earth fault

● Same features for both except inside diameter (120 mm et 200 mm)

● Caution to the direction of the coil (P1- P2 and S1-S2 or arrow on the toroid)

according to drawing

● Allowed only for insulated cable

(low voltage insulation)

Toroid CSH 30





● Design to convert CT output (1A or 5A) to

Sepam residual current input

● Caution to the direction of the coil (P1- P2 and

S1-S2 or arrow on the toroid) according to

drawing

Residual current input




● CSH 120 or 200

Ratio 1/470

●Recommended for detection of very low

default current

● CT 1A or 5A + CSH30

connected to CT secondary

Recomended Io minimum threhold:

0,10 In CT (with DT curve)

Recommended Io minimum threshold :

> 1 A

CT 1A : 2 Turn

CT 5A : 4 Turn





● CT 1A or 5A + CSH30

connected to CT secondary

1A: 2 turn

5A: 4 turn

● Accuracy can be increase by 10 on

Sepam by setting In0 = In/10

Recomended minimum threshold :

0,10 InCT (with DT curve)





● ACE990 is an adaptator between MV

toroid with a ratio 1/n (50 < n < 1500) and

Sepam input

● This wiring allows to keep old toroid (incase of revamping for example)

Range from 0,1 Ino to 15 Ino

Toroid CHS 120 and 200




• Inside the shield of the incomer or out comer power cable a residual current can be

generated due to various factors.

• This current could be enough to trip the

Sepam(and the circuit breaker).

• Always re-passing through the toroid a cableconnected to the shield.

• This way of cabling avoid troubleshooting

tripping order.

i i

Voltage Transformer




●VT phase-neutral

●VT phase-phase

●Caution to the direction of the coil

(P1- P2 and S1-S2 or arrow on thetoroid) according to drawing

●1, 2 or 3 transformer(s)

●Fuses integrated (option)

TP wiring




● 3 Tension phase-neutal

(Standard drawing)

● 1 Residual tension(delta open)

Withdrawable parts for MCset



Withdrawable parts




CIRCUIT BREAKER

LF 1

LF 2

LF 3

SF1

SF2

EVOLIS

CONTACTOR

ROLLARC 400

ROLLARC 400D

EARTHING SWITCH

CONNECTOR TRUCK








Designed to operate until 17,5 KV

Breaking in SF6 with self expansion technique

3 poles in a pressurized enclosure (1.5 bar)

No filling is required

Driven by energy accumulator which ensures

very fast operation and a speed independent of

the operator

Operated by RI drive

Included pressure sensor

Energy accumulator




OpenDischarged

OpenCharged

CloseDischarged

Self-expansion technique




Two electrical contacts are inside a sealed

chamber

When these contacts are separated, the

electric arc generated increases the pressure

This overpressure creates a natural convection

flow through the tubular contacts which is now

open

A magnetic field makes the arc spinning

around the contact

The field is created with a serial magnetic coil

by the current of the short circuit

The arc extended, blown and cooled by this

technique, decreases rapidly and disappears

Self-expansion technique




Circuit breaker closedMain contact are opened Arcing contact are openedCircuit breaker open

LF1, 2, 3 envelope




Electrical contacts are inside a sealed chamber

This chamber is composed of 3 independent

sealed compartment with 3 overpressure

valves

SF6 is under a pressure of 1,5 bars

Contains 3 molecular absorber

LF1, 2, 3 characteristics




RI Operating mechanism




Manual or powered by motor

Driven by energy accumulator which

ensures very fast operation and a speed

independent of the operator

Open/Close and charging/dischargingindicator

Number of operation counter

With or without key to lock the circuit

breaker (option)

Trip with Mitop, shunt trip or/and under voltage coil

Tripping devices for MCset




• Opening coil (also called opening release or shunt trip)

Electric coil, single or double coil. Power supply AC or DC

• Undervoltage : This release unit causes the opening of the circuit

breaker when its supply voltage drops below a value less than 35% of therated voltage. Power supply AC or DC

• Mitop : low consumption release, with permanent magnet.

Used only with the Sepam 100 LA, VIP 3000, Satimax…

Work without auxiliary power supply

RI drive characteristics




Circuit breaker wiring




Q

Closing Anti pumping

relay

Opening

External inhibit

close

Ext ernal External

closing opening

Inhibit close

( Sepam)

Closing

( Sepam)

Trip circuit supervision

This function check the complete tripping circuit (equipped with

shunt trip coil) and the auxiliary power supply




Normal circuit:

Device D closed, input I11 is excited,

input I12 is not excited.

Device D open, input I11 is not excited,

input I12 is exited.

Default circuit :

I11 and I12 get a different position

After 200 ms if there is no change on I11 and I12

or if inputs I11 and I12 are not correct SEPAM

send the message ”Control fault”

shunt trip coil) and the auxiliary power supply

Circuit breaker SF1 and 2



Circuit breaker SF1 and 2




Designed to operate until 24 KV

Breaking in SF6 with self compression technique

3 poles in a pressurized enclosure (0,5 to 3,5 bar

depending on the performance level)

No filling is required

Operated by GMH drive (with stored energy)

Pressure sensor (option)

Self-compression technique




When the arcing contacts are separated, they

drive (in a same axis) a piston.

The SF6 gas compressed by this mechanism

goes out of the chamber through a hole in front

of the arc.

The gas is exhausted with force and blows out

off the electric arc

Self-compression technique




Circuit breaker closedMain contact are opened Arcing contact are openedCircuit breaker open

SF1 and 2 envelope




●Leakage less than 0,3 % per year

●Molecular absorber

●Safety valve

●Underpressure sensor (or

overpressure)

SF1 and 2 characteristics




GMH operating mechanism





Driven by energy accumulator which

ensure very fast operation and a

speed independent of operator

Open/Close and

charging/discharging indicator

Number of operation counter

With or without key to lock the

circuit breaker(option)

Trip with Mitop, shunt trip or/and

under voltage

GMH characteristics




Evolis circuit breaker



EVOLIS Circuit breaker




Designed to operate until 17,5 or 24 KV

3 poles in a vacuum enclosure (10-2 Pa)

Breaking with AMF technique

Very simple and compact interrupter

No maintenance is required for poles during

30 years(no need for contact wear inspection)

Operated by P2 or RI drive (with stored energy

accumulator)

Evolis casing




Frontal breaker are available in fixe or

withdrawable version

A fixed lateral version is equipped

with an integrated protection chain

(VIP control unit and current sensor

Evolis Interrupter




Two electrical contacts, one fixed and the other mobile in an sealed enclose

The latter enable a high level of vacuum (less

than 10-2 Pa)

This type of enclosure provide a good insulation

and allows to reduce the gap between the open

contacts

In order to keep the vacuum level required for the correct operation of the breaker during 30

years the choice of materials and the sealed of

the chamber are very important

“Getter” material are used inside to absorb the

residual gas

Evolis AMF technique




In vacuum breaking, the electric arc generated ismade up of plasma and metal vapour

At low value of current, these vapours very quickly

condense on the shield and the arc disappeared

At high current, the electric arc switches to a

concentrated mode which causes high localized

temperature rises on contacts

The AMF technique(axial magnetic field) involve

applying an Axial Magnetic Field parallel to theaxis of the two contacts which allows a diffuse arcto be maintained

The arc energy is spread over the whole contact

surfaces area, therefore causing very low levels of

erosion

Evolis interrupter




In vacuum breaking, the electric arc generated

is made up of plasma and metal vapour

Two different size are available depending of the

voltage

The Axial Magnetic field is generated by

• A coil outside the interrupter for ratedvoltage up to 17,5 KV

• A coil integrated inside the interrupter

contact structure for the 24 KV


P2 Operating mechanism





Driven by energy accumulator whichensure very fast operation and a speed

independent of operator

Open/Close and charging/discharging

indicator

Number of movements counter

With or without key to lock the circuit

breaker(option)

Trip with Mitop, shunt trip or/and under

voltage

Equipped with anti-pumping relay

P2 Operating mechanism devices




P2 Operating mechanism devices




Circuit breaker Evolis range




Evolis characteristics




Rollarc contactor



ROLLARC contactor




Designed to operate until 12 KV

Breaking with rotating arc technique

3 separate pressurized poles with SF6

Electromagnetic operated mechanism

3 HPC fuses with striker pin (trip the

contactor)

Included pressure sensor

Arc rotation is obtained by electromagneticfield (Laplace law)

Rotating arc technique




This field is created by a solenoid powered bythe mains

Arc is blown away and cooled as it spins in thegas

The fast rotational movement makes the arcrapidly reduce

This technique associated with SM6 gas allowsvery fast arc extinction

Allowed to modulate the cooling speedaccording to current value

This soft way of switching avoids tear-offs

current and dangerous overvoltage (advantagefor motors)

Rollarc pole unit




Each pole unit consists of:

A main circuit

A breaking circuit with

arcing contact

blowing coil

An operating mechanism Electromagnetic coil and opening coil

(mechanic latch for 400D)

Electromagnetic coil and latching coil

(Electro-magnetic latch for 400)

Rollarc 400, electrical drawing




Rollarc 400 D overview




1 : MV connections

2 : LV connections

3 : Auxiliary contacts

4 : Pressure Switch

5 : Electromagnetic drive

6 : Mechanical latch (R400D)

7 : Opening coil

8 : Fixing point

9 : Hard point

10: Description plate

ROLLARC contactor Endurance




ROLLARC characteristics




Rollarc 400 electrical drawing




Rollarc 400D electrical drawing




DI switch



DI SWITCH

Breaking capacity with SF6




3 pressurized poles (0.4 bar)

Including earthing switch

Drive system with spring mechanism

(very fast operations )

Breaking by rotating arc ( magnet inside)

SF6 regenerator inside

Overpressure safety valve

DI operating mechanism




Breaking capacity with SF6

Disconnector switch and earthing

switch

Driven by lever or motor

With spring accumulator

Synoptic indicator

Broken fuses indicator

Switch function To close

CI2 drive for DI




With the lever or the motor, run the mechanism until the end. It compress a spring ON push button or the trip coil release the energy stored and close the contact very fast

To open

OFF push button or trip unit release the energy stored and open the contact

Earthing switch function To close

Operating energy is given by the compression of a spring which cause the closing of

earthing contact after passed a neutral point

To open

Same as above

CI2 drive parts




Mcset safety systems



By operating mechanism

Operating lever designed to stop any attempt to re-open before complete

closing (for switch and earthing)





closing (for switch and earthing)

Automatic padlock enables or disables the drive of switchgears

key locking systems

By indication on the front panel A synoptic is moving to indicate the status of the switchgear

VPIS system (capacitor divider) indicates directly the presence of tension on the power cables

By internal protection

Metal clad enclosure

Disconnector switch with earthing switch closure capacity

Safety overpressure valve

Evacuation system for hot gases which goes away from the operator from flaps

By internal arcing flaps detection (option)

Forgetting tools on busbar after

maintenance

Causes of internal fault




Very corrosive atmosphere

Forcing interlocking

Overvoltage due to lightning

Dust

Presence of animals

Protection system fault

Component malfunction

Overpressure discharge on MCset

flaps




gas

flaps

Internal arc detector

Internal arc detection




Limit the duration of the arc Limit the damage of the arc

Flaps opening – gas exhaust

micro-switch

flapsgas

Flaps are opened

Internal arc detection




p p

+ auxiliary contacts Signal treatment Breaking

Internal arc beginning

Information is send

to SEPAM Opening tripping order

for circuit breaker

20 ms 30 ms 90 ms

(Tripping coil

supply at 85%)

End of Internal arc

Total treatment time with flaps less than140 ms

Key lock systems A1 type




Aim of locking

Key lock systems A1 type




Prevent to close the earthing switch under power

Access inside the cubicle without earthing

OPERATIONS :

Open and lock the Low Voltage circuit breaker. Key 0 is free

Insert key 0 in earthing switch

Open the disconnector switch

Close the earthing switch

Remove the front panel

Key lock systems C4D type




AIM OF LOCKING

Prevents to close the earthing switch under power

A i id th bi l if thi it h i t l d

Key lock systems C4D type




Access inside the cubicle if earthing switch is not closed Access to the transformer if earthing switch is not closed

OPERATIONS :

Open and lock the Low Voltage circuit breaker. Key 0 is free

Insert key 0 in earthing switch

Open the Medium Voltage circuit breaker Open the disconnector switch

Close the earthing switch

Remove the front panel

Take the S key inside the cubicle

Insert the S key inside the shutter’s protection connector

Remove the transformer’s protection

Heater resistor

when the cubicle is installed in a humid atmosphere or is de-energized for

extended periods of time.




Description :

● One heater resistor 50 W/230 Vac.

● The heater resistor is controlled by a miniature circuit

breaker.

● The heater is switched off when the contactor is energized.

Mcset maintenance



WARNING !




All the following operations described should be carried out

with the safety regulation in force and under the responsibility

of an authorized person.

Always keep in mind that electricity or storage energy springcan cause serious injury in case of non compliance of safety

procedure.

According to AFNOR rules there are 5 different level of maintenance

Maintenance level




First level : simple adjustments using accessible devices, without dismantling or openingthe equipment

Second level : troubleshooting resolved by standard replacement of spare parts andminor preventive maintenance operations

Third level : identification and diagnosis of failures, repairs by replacement of spareparts and by following all standard preventive maintenance operations

Fourth level : all major corrective or preventive maintenance work

Fifth level: Retrofit, modification or major repair work assigned to a central workshop.

MCset is designed for long life cycle with reduced maintenance. Only few operations

are required under normal operating conditions (temperature between - 25 °C and

55°C clean environment normal humidity )

Maintenance program




Operate the different functions

Operate the key lock systems

Clean and lubricate withdrawable parts

Clean and lubricate earthing switch

Check all fuses

Clean MCset internal parts

Measure wear of poles (if possible)

Clean the exterior cubicle envelope and air vents. In case of forced

ventilation, cleaning is imperative.

55 C, clean environment, normal humidity…).

If possible these operations should be carried out once a year or at least every tree

years

Open low power compartment and open auxiliary

circuit breaker

Withdraw circuit breaker from MCset




Make a discharge sequence: closing/opening/closing

Press the red button 1 and in the same time turn the button 2 in

rotation position

Plug the crank and turn anti clockwise until the end (turn back

quarter turn to release the mechanism)

Remove the crank

Turn the button 2 in position withdraw

Open the breaker door

Release the Harting plug, disconnect it and place it on the holder

Place the truck and adjust it to plug the two pins in their fixing





Place the truck and adjust it to plug the two pins in their fixingholes

Lock the pins by turning their cranks and break the truck with

pedals

Turn the button 2 in release position

Pull with both hands to extract the circuit breaker until the end

Lock the breaker on the trolley by turning button 2 in position

withdraw

Re-connect truck to MCset and lock it with the two pin crank and breaks

Draw in circuit breaker from MCset




Re connect truck to MCset and lock it with the two pin crank and breaks Push circuit breaker in its compartment until the end

Lock it by turning the button 2 in withdraw position

Release and remove the truck

Re-connect the Harting plug (push the red button and cover) and close the front door

Press the red button 1 and in the same time turn button 2 in rotation position

Plug the crank and turn clockwise until the end (turn back quarter turn to release themechanism)

The synoptic plugged appears

Remove the crank

Every two years (for example If possible) checking powerconnections is suitable

Checking power connections




Every two years (for example If possible) checking power connections is suitable

It means mainly (after switching off the power and earthing), to

check with a torque test key that every busbars’s bolts are

correctly tightened

Check also that all connection cables are correctly connected tothe termination and that every bolt is correctly tightened

MCset is designed for long life cycle with reduced maintenance. No particular operation

is required under normal operating conditions (temperature between

-25 °C and 55°C, clean environment, normal humidity…)

Lubrication parts




25 C and 55 C, clean environment, normal humidity…)

However, if possible, clean and lubricate every 3 or five years the operating mechanism

Oil , grease and cleaner characteristic

Mechanical grease : ISOFLEX TOPAZ L152

Mechanical lubricant : MOBIL VACUOLINE 133 or SAE 15W40

Electrical contacts grease: Vaseline MOTUL SUPRACO WP70

Cleaner : type SRB2 or SRB

Be sure that Power is off in all the plugs (incoming

and out coming bus bar !)

Put electrical contact grease on the tree copper

Lubrication parts : Earthing switch




Put electrical contact grease on the tree copper

earthing contacts (orange arrow )

Grease the lever mechanism

Grease the connecting roads of the traction lever


Lubrication parts : Shutter




Be sure that Power is off in all the plug (incoming

and out coming bus bar !)

Operate manually the shutters

Clean and replace mechanical grease on shutter rail

Clean and replace mechanical grease on operatingmechanism (axis and bearing)

Check that shutter and mechanism are running well


Be sure that Power is off in all plug (incoming and

Lubrication parts : Power plugs




out coming bus bar !)

Operate manually the shutters

Clean and replace electrical contact grease on the

six male contacts

Clean and replace electrical contact grease on the

six female plugs

Lubrication parts : Propulsion system




Remove the withdrawable

part(circuit breaker, contactor...)

Clean and grease the 2 lockers

Clean and grease the finger

Clean and grease (if possible)

the spinning arms

Parts to be replaced Operated by Description

Breaking parts Exchange only

Key lock OR CLIENT

Closing spring

Replacement parts for circuit breakers




Closing coil OR CLIENT

Opening coil OR CLIENT

Motor reducer gear OR CLIENT

Micro switch OR CLIENT

M1, M2, M3 end of charging switch OR CLIENT

Anti pumping relays OR CLIENT

Auxiliary contacts OR CLIENT

Operating mechanism plate

Under voltage release (with lifter) OR CLIENT Or installation

Mitop Or installation

Operation counter

Parts to be replace Operated by Description

Switching parts OR CLIENT Exchange only

Replacement parts for Rollarc contactor




Contacts insertion, draw in position, auxiliary OR CLIENT

Electronic board and relay support circuit OR CLIENT

Closing release OR CLIENT

Opening release OR CLIENT

KMO, KMF, KN relay OR CLIENT

LV and HV fuses OR CLIENT

Transformer operating mechanism OR CLIENT

HV fuse blowing contacts OR CLIENT

Access to the LV compartment

Access to the inter-cubicle fixing screws

Compartment accessibility




Access to bus bar

Access to the removable part

Simplifies cable access

Access to the MV cables, earthing switch

Access to the rear jacks via the

service void or cable trench

Replacing the upper and lower busbar insulator holder

Changing bus bar rating

Replacing earthing switch clamps and blades

Installing an earthing switch.

Replacement parts normally operated by

Schneider electric after sales service




Earthing switch operating mechanism

Installing or replacing a zero-sequence toroid

Installing VT function

Increasing the number of cables

Replacing shutters and operating mechanism

Extracting cubicle from switchboard

Adding flap padlocking

Replacing capacitive insulator

Replacing draw-in stud

"Power On" indicator lights

Replacement parts available for customer




Key-locking

Zero-sequence toroid

Operations on the VT compartment: MV and LV contacts, MV fuses, etc.

Humidity resistor (drying)

Cable connection insulator holder

Moving part carrier and position contacts

Position contacts of the earthing switch and removable part

Surge arrester

Winding ratio on CT or VT transformer

Switching off and earthing MCset

Discharging energy storage spring

Opening covers




Discharging energy storage spring

Open the front door

Remove the HARTING plug

Remove the white cover (6 screws)

Remove the black panel (4 plastic clips on the back

or 6 nylstop nuts )

1. Electrical anti pumping relay

3. Rotary auxiliary switch block

1 2

3

RI operating mechanism




5. Terminal block

7. Shunt (or overcurrent) trip devices

9. Geared motor (optional)

11. Operating mechanism

13. Low energy trip device (optional)

15. Closing coil

5

4

6

8

9 Energy storage spring

RI operating mechanism




9 Energy storage spring

10 Crank

11 End of charge switch

9

10

11

Pump with the lever to compress the Closing spring

until the end

Lubrication parts for RI drive




Grease the upper spring guide axis

Grease all along the top rail spring guide

Grease all along the bottom rail spring guide

Grease the bottom spring guide axis

Grease the connecting road of manual lever

Grease the ratchet wheel

Lubrication parts for RI drive




Grease the axis of motor gear (optional)


Switch off and earth MCset

Discharge energy storage spring from circuit breaker as

shown before Open the front door

Replacing closing coil




Open the front door

Remove the operating mechanism cover

The trip device is located inside the RI drive

Mark the wiring and disconnect it

Remove the Coil (2 bolts)

Proceed in the reverse order to reassemble


Discharge energy storage spring from circuit breaker

Open the front door


Replacing shunt trip coil





The trip device is located on the left side of RI drive


Remove the Coil (2 bolts)




Open the front door


Replacing auxiliary block switch





The auxiliary switch is located in the middle of RI drive (red

circle)


Remove the terminal bloc (arrow orange) by unscrewing 2

bolts

Remove the spindle and the clip

Remove the two nylon stop nuts

Replacing auxiliary block switch




Remove the auxiliary block switch

Remove the screw with it’s nylon stop nut and then the

rectangular plate.

Remove the crank and replace it on the new auxiliary

switch block. Take care to replace the crank in the good

position / axis (0 engraved on the spindle)




Open the front door Remove the operating mechanism cover

Replacing end of charge switch




The switch on the left side of

RI drive (bottom)


Remove the switch (2 bolts)

Proceed in the reverse order to reassemble. Take care

when replacing bolts (tightening torque 0,15 mdaN).



Open the front door


Replacing anti pumping relay





The switch is placed on the top of RI drive


Slid a 7 mm spanner between the terminal block and relay

Unscrew by few turn and disengage the relay (exit hole)

To reassemble, engage the front pin first and proceed in

reverse order

1. Opening coil

3. Closing coil

1

2

GMH DRIVE




5. Under voltage coil

7. Closing spring

9. Motor and reduction gear

11. Latching unit

13

5

4

6


Discharge energy storage spring from circuit

breaker

Open the front door

Lubrication parts for GMH drive




p

Remove the 2 operating mechanism covers

Pump with the lever to compress the closing spring

until the end

Grease the upper spring guide axis

Grease all along the top rail spring guide Grease all along the bottom rail spring guide

Grease the bottom spring guide axis

Do the same for the left spring

Grease all axis and bearings of drive

Grease the moving parts of manual lever (axis and

bearing )






Grease the axis of the motor and reduction gear

(optional)


To access to latching unit, remove opening

coil and key lock (option)





y ( p )

Check BAUMAN clips

Clean parts with lubricant cleaner and

brush

lubrify axis and bearing with lubricant

cleaner and brush



Open the front door Remove the operating mechanism cover

Replacing closing coil




The trip device is located inside the GMH drive


Unscrew the 2 fixing bolts and remove the coil


Tighten torque 13 Nm

Check that the half moon B release well the lever A during

tripping



Open the front door Remove the 2 operating mechanism covers

Replacing shunt trip coil




The trip device is located inside RI drive



Tighten torque 13 Nm

Check that the half moon B release well the lever A during

tripping


Discharging energy storage spring from circuit breaker


Replacing end of charge switch




The switch is on the left side of GMH drive (top)

Remove the 2 closing springs

Remove the top axis of left closing spring


Remove the 2 switch holders fixing screws and their washers Remove assembly and exchange switch

Proceed in the reverse order to reassemble. Take care when

replacing bolts (tightening torque 2,8 Nm for switch and 6 Nm

for metal holder )



Open the front door

Replacing anti pumping relay




Remove the 2 operating mechanism covers

The switch is placed between the 2 auxiliary block

switches


Unscrew the 2 nuts and washers.

Remove the relay


Tighten torque 2 Nm




Th t i d i i l t d i id GMH d i

Replacing under voltage coil




The trip device is located inside GMH drive


Remove the coil (2 screw)

Proceed in reverse order to reassemble

Tighten torque 13 Nm Make sure when magnetic toroid is closed that the gap

between cylinder and tripping lever (after screwing) is

about 1 mm

Thermal diagnosis system

● The different temperatures are measured on most sensitivearea and send by optic fiber to the control unit.

● The sensors are located on power cable connections and o

To reduce maintenance costs in MV substations, this system

continuously monitors temperature rise.





top MV fuse holders.

● Optical fibres, avoid to introduce any risks of insulation or

disturbance.

Functions:● Permanent monitoring of temperature

● Tripping of a “pre-alarm”, then an “alarm” by activating dry

contact outputs,

● Indication of the zone and circuit involved.

All MCset products have been designed to be easily recycled to

reduce the impact on our environment

Earth saving




Recycling center

Service Généraux Environnement

38V. Varces

ZAC Champs St Ange

38760 Varces Alliére et Risset.Tel +33(0)4 76 39 88 43


And join us to build a new electric

world *



http://schneider-electric.fr

* Merci pour votre participation et rejoignez nous pour

construire un nouveau m onde électrique.

Training Motorpact



Table of contents

● The Motorpact

● Direct stator starting on full voltage

(FVNR)

● Reduced voltage by auto-transformer ● Reduced voltage by soft starter

● Motorpact in focus




Motorpact in focus

● Motorpact single line diagram

● Motorpact compartments

● Current and voltage transformers

● Operating panel● Motorpact Safety systems

● Earth saving

What is Motorpact ?

●Motorpact is a motor starter modular cubicle. It

is designed for 3 phases asynchronous motors

up to 7,2 KV and 3800 kW. It is fully tested for internal arc withstand.




●The MV starter and motor are the links

between the electrical network and the

mechanical load

Motor starter Network

Protections

Motor Load

What is Motorpact ?




Overcurrent

Thermal protection

...

The main functions of a MV motor starter are to start and protect MV motors

The motor starter must also be designed to limit the constraints to the

network and the load

Chillers

PumpCompressor

Conveyor

- Offshore platforms

- Refineries- Mines

- Cement plants

LPG i d i

Typical starter Applications




y

Fans

Blower

Chipper

Capacitor BankTransformer

etc...

- LPG carriers and cruise

- Treatment plant....

Medium voltage motor starters are normally used to drive induction motors (Squirrel

Cage) 300 KW (400 horsepower) and up because they do so at lower cost than LV Motor starters.

When using MV Motor Starter ?




P=E*I, when E is large, I is smaller. Therefore, cables can be smaller and cheaper. I 2R

losses are also lower, so operating costs will be less expensive. In some case the cost of

MV/LV transformers can also be eliminated.

E : Electro Motive Force (in Volts)

I : Current (in Amperes)

P : Power (in Watts)

R : Resistance (Ohms)

In some cases the cost of MV/LV transformers can be eliminated.

Protection

Main contactor

Motor Load

Direct stator starting on full voltage (FVNR)




Locked rotor current on starting is around 4 to 7 In depending on motor characteristics.

Starting time of 1 to 10 seconds depending on the moment of total inertia (motor +machine) motor torque and load torque.

The network must be able to withstand to starting current without disturbing other loads.

The machine being driven must be able to withstand to mechanical impact due to the

motor torque.

This mode is very popular (simple, robust, not expensive).

CT1

Auto-transformer

ProtectionMotor Load

CT2

Reduced voltage by auto-transformer




This system is recommended for high power motors. It has the advantage of not dissipate

energy.

It can be used to obtain, for the same decrease in current, less reduction in torque than

with the reactor starter.

CT3CT1 : Start Contactor

CT2 : Main Contactor

CT3 : Run Contactor

LoadProtection

Motor Soft Starter

Main

t t

By pass

contactor

Reduced voltage by soft starter




contactor contactor

The soft starter is a solid state device which controls the motor during start-up.

Different starting mode are available depending on the application.

When the motor is running a contactor shunts the electronic starting module.

Main contactor

LoadProtection

Motor Soft Starter

Main

t t

By pass

contactor

Reduced voltage by soft starter




contactor contactor

Advantages

Reduction of starting current

Reduction of starting torque and mechanical shock(the torque may be adjustedto the resistant torque)

It is a solution when auto-transformer motor starter is not possible. But it is not a

variable speed starter

Low voltage control

cabinet

Operating panelBusbar compartment

Motorpact in focus




MV fuses

Vacuum contactor

Load compartment

Line disconnector

1-Earthing switch

2-Disconnector switch

3-H.P.F fuses

4-Withdrawable contactor

5-Current sensors

6-V.P.I.S

Motorpact single line diagram




8-Voltage transformer

7-Second earthing

switch

9-Second current sensor

10-Lighning arrester

Low voltage compartment

●Compartment for control unit,

monitor




monitor…

● Protection relay Sepam series 20,

series 40 et series 80

● Sepam 100 MI for drive andsignalisation

● Power Meter or Circuit Monitor (Power

Logic System)

● All drive devices

●Insulated from other compartments

Disconnector/earthing switch

compartment

● 2 positions

Closed or earthed

● Mechanical drive

● Earthing switch operated by a spring




● Earthing switch operated by a spring

● Closing interlock (allowed operation if MT

door is closed and contactor is open)

● Glass windows (visual check)

with Internal light for check (option)

● Heavy duty (5000 movements)

● Include holders for power fuses

Bus bar compartment

● Bus bar up to 3150 A

● Insulated or not




● Mounting directly on disconnector switch

● Short time current withstand

● 50 kA / 2s

● Access to busbar by low voltagecompartment (for maintenance)

Bottom compartment

● The door can only be opened if contactor

is open and earthing switch is closed

● Composed of:

● Earthing switch with its glass windows




● Earthing switch with its glass windows

● Power fuses

● Vacuum contactor

● Current transformers LPCT

● Incoming or out coming connections

● Option

● MV transformer for Masterpact power supply

● Voltage transformer

● Lightning arrester

● Voltage presence indicator (VPIS)

MV fuses

●Fuses HPC (High Cutting Power) :

MV power fuses are used for short circuit current protection. Contactor are used only

for switching on and off the load on normal current




●Fuses HPC (High Cutting Power) :

Easy to access and check

●Special fuses for motor or other load● 315 A maximum with simple fuses or

● 2 x 250 A maximum (double fuses)

●Breaking capacity : 50 KA

●Blowing fuse indicator FuselogicTM open

the tree poles of the contactors

Fuselogic (option)

●Bowled fuse indicator ● Indicate the state of the fuse

● Indicate the presence or not of the fuse




● Indicate the presence or not of the fuse

● Trip contact for protection relay back up

●Glass windows in access door for visual check

Vacuum contactor

● 200, 400 or 450 A vacuum contactor

● Pluggable contactor truck

● Heavy duty plugs




y y g

● Light and compact

( 25 kg easy to handle)

● Electromagnetic drive

● Mechanical or magnetic latching

● Simple, reliable and very easy to use

Control terminal

blocks with

drive unit

Closing coil

Load

connections

Vacuum contactor




g

Auxiliary switch

Indicator Open/close

Contactor features




Drawable contactor




Position embrochée Position débrochéeRail sortiOpen the bottom

door

Pull the rail guide Extract the

contactor

Withdrawable plugs

● Heavy duty plugs

Heating duty tests

● 400 A permanent current

Mechanical duty




● Contact plug

● 500 movements

Bottom compartment Power cables● Outlet by the bottom

● Free space for power cables on

the back

● Access by the front or by

the rear

or the top




the rear

Capotage

Formex®

Bottom compartment SMALT

(option)




Extrémités câbles

Formex®

Voltage transformer optional

for measuring and protection

Current transformer or

LPCT

Measuring transformer




Fuses and holder for transformer

Voltage transformer optional for

drive (CPT), with fuse protection

LPCT

●The LPCT is the standard current sensor for Motorpact.

●It consists of a three core voltage current




sensor mounted inside a block.

●The LPCT is compatible with Sepam series 20,

40 or 80 digital relays and provide the requiredperformance for the protection and measuring

functions.

●Due to its linearity, this sensor covers the

entire operating range.

LPCT Characteristics




Accuracy

Current


● Alternatively, Motorpact can be supplied with

a three core phase CT.

●This CT is optimised for Sepam digital relays




●This CT is optimised for Sepam digital relays

and will provide good performance and

protection for the system.

●It is essential to verify, especially in case of

rating change (change in motor power for

instance), that dimensioning rules are

satisfied.

Current transformer features




Zero sequence current transformer

●Three types of zero sequence

current transformer (ZSCT) may be

used:




●Internally mounted zero sequence

CT

●Internally mounted CSH 280

●Internally mounted CSH 120 and 200

Heater resistor

Description :

O h t i t 50 W/230 V

Heaters are required to prevent condensation when the cubicle is installed

in a humid atmosphere or is de-energized for extended periods of time.




● One heater resistor 50 W/230 Vac.

● The heater resistor is controlled by a miniature circuit

breaker.

● The heater is switched off when the contactor is energized.

Thermal diagnosis system

● The different temperatures are measured on most sensitive

area and send by optic fiber to the control unit.


top MV fuse holders.

● Optical fibres, avoid to introduce any risks of insulation or

di t b

To reduce maintenance costs in MV substations, this system

continuously monitors temperature rise.




disturbance.

Functions:

● Permanent monitoring of temperature

● Tripping of a “pre-alarm”, then an “alarm” by activating dry

contact outputs,

● Indication of the zone and circuit involved.

Ethernet

Option Transparent Ready




Motorpact front panel



All the following operations described should be carried out

with the safety regulation in force and under the responsibility

of an authorized person.

WARNING !




Always keep in mind that electricity or storage energy spring

can cause serious injury in case of non compliance of safetyprocedure.

Operating panel

The operating front panel comprises different control and

indicating elements:

● Control “Run” and “Stop” pushbuttons,● Indicating lights

● Local-remote switch (optional),

● Mimic diagram,

● VPIS




● Operating sequence,

● Open closed indicator,

● Running time meter (optional), as well as voltage presenceindication system.

● A viewing window and a pushbutton for the disconnector

and load compartment back light.

Operating panel (interlocking)

The operating front panel allows control, interlocking and

padlocking:

● earthing switch operator,

● earthing switch key interlock,

● disconnector operator,




● disconnector key interlock,

● disconnector padlock provision,

● earthing switch padlock provision.

Voltage presence indicator system VPIS (option)

● A pluggable device with 3 lights and a capacitor

divider indicates the presence of voltage on

power cables

● Synchro check

● With fuses holder (or not)

● Indicate the presence of tension on incoming

cable for incomer cubicle and on outlet cable for




cable for incomer cubicle and on outlet cable for

feeder cubicle

Motorpact Safety systems




Forgetting tools on busbar after

maintenance

Very corrosive atmosphere

Forcing interlocking

Overvoltage due to lightings

Dust

Causes of internal fault




Dust

Presence of animals

Protection system fault

Component malfunction

By operating mechanism

Operating lever designed to stop any attempt to re-open after being

closed (for switch and earthing)

Automatic locker enables or disables the drive of switchgears

key locking systems

By indication on the front panel Symbol is moving to indicate the status of the switchgear

VPIS system (capacitor divider) indicates directly the presence of





VPIS system (capacitor divider) indicates directly the presence of

tension on the power cables

By internal protection Metal clad enclosure (option). Access type AFLR

Double earthing switch

Safety overpressure valve

Evacuation system for hot gases which goes away from the operator

with top flaps

Overpressure gas flaps

Rear panels locked

Overpressure discharge




Rear panels locked

and screwed

All MCset products have been designed to be easily recycled to

reduce the impact on our environment

Earth saving




Recycling center

Service Généraux Environnement

38V. Varces

ZAC Champs St Ange

38760 Varces Alliére et Risset.Tel +33(0)4 76 39 88 43


And join us to build a new electric world *

http:/ / schneider-electric.fr




construire un nouveau monde électrique.

Training Sepex



Table of content

● The loads and their constraint

● Switchgears and Sepam

● ANSI codes

● The Sepam protection relay

● Measuring transformers for Sepam



● Tripping devices

● Additional modules

● Sepam front panel

Table of content (following)

● Sepam wiring and installation

● Software SFT 2841

● Measurements functions

● Protection functions



● Disturbance recording

● SEPAM maintenance

The loads and their constraints



Different types of electrical faults

● In the industry, wide networks and great diversity of mechanism cancause a lot fault and malfunction.

● These default can be generate by various factor such as insulationdefault, overload, short circuit…

● We will separate these troubleshooting by origin :



● Transformator faults● Motor faults

● Generator faults● Capacitor faults● Busbars faults● Substation faults

Transformator faults

Defaults andphenomena

Impacts Protections

• Short-circuit • Coil destruction• Fame or tank destruction• Magnetic circuit destruction

• Max In I-50/51• Transformator differential - 87T• Buchholz - 63• DGPT2- 63

• Earth fault • Coil destruction • Io Max - 50N/51N



Earth fault• Magnetic circuit destruction • Earth differential restraint

- 64 REF

• Earth thank - 50G/51G

• Overload • Insulator destruction• Reduction of duty

• Max In- 50/51• Thermal image- 49RMS• Temperature- 49T

• Start up pick with TC

saturation

• Randomize trip of protections • H2 restraint

Transformer inrush current



Transfo magnetizing with TC measurement



Buchholz protection relays

● Protection for breathing oil transformer

● Again internal fault

● Slow leakage of gas make the float F1moving down



g=Alarm

● Violent outlet of gas or dielectric liquidleakage make the float F2= Switch off power supply

DGPT2 or DMCR protection relays

● Protection for sealed oil transformer

● Against internal fault

● Slow leakage of gas make the float F1moving down=Alarm

● Overpressure (above 0,2 bars) make thefloat F2 moving up



float F2 moving up=Switch off power

● Against overload (overheat)

● Temperature threshold 1=Alarm (above 90°C)

● Temperature threshold 2=Switch off power (above 100°C)

Motors faults

Defaults Impacts Protections

Upstream • Under voltage• Unbalance current

• Current increase• Overheat

• Min voltage- 27• Max In- 50/51• Max reverse factor- 46• Thermal Image -49RMS

Inside • Short circuit• Earth fault• De-synchronized

• Coil destruction• Magnetic circuit destruction•Speed too low

• Max In- 50/51• Machine differential - 87M• Max Io- 50N/51N• Pole slip 78 PS



• Pole slip- 78 PS

Down-stream

• Overload

• Start too long• Blocking rotor • Pump cavitations

• Over current

• Overheat• Mechanical failure• Pump destruction

• Thermal image - 49RMS

• Excessive starting time - 48• Locking rotor -51LR• I Mini -37

Use • Number of start per hour • Overheat • Number of start per hour limitation- 66

Motor starting curve

Protection relay



Id (6 to 9 In RMS)

Id ’’ (2 to 2,5 In pic)

Protection against short-circuit

(magnetic)

Generator faults


• Short-circuit • Coil destruction• Magnetic circuit destruction

• Max I 50/51• Machine differential -87M

• Voltage restrain phase over current- 50V/51V

• Earth fault • Coil destruction• Magnetic circuit destruction

• Max Io 50N/51N• Restricted earth fault - 64 REF• Neutral voltage displacement- 59N



• Loss of synchronization • Over speed• Reactive power (motor)

• Overheat

• Pole slip - 78PS• Under impedance – 21B

• Regulation fault • Overheat• Engine performance• Output voltage

• Under and over frequency - 81H/81L• Under voltage - 27• Overvoltage - 59

• Active power return• Unbalance

• Mechanical stress• Overheat

• Directional active overpower - 32P• Unbalance - 46• Max de tension 59

Generator short-circuit curve

generator withexcitation compound

1 2 3



fault

Generator with serial

excitation

Capacitor bank faultThis is your turn :


•Internal short circuit • Reduce capacity value

• Overload

• Reduce duty life



• Earth fault • Insulator destruction• Unbalance current

• Overvoltage • Insulator destruction• Reduce duty life

Other type of troubleshooting (network)

Overload In

temps

Over voltage(peak)

Over heating

Voltage drop

short circuit

Saturation

Over speed

Destruction

V



Under voltage

Frequencies shift,harmonics,

transiting phenomena's…

Ur

temps

Current increase

Overload

OverheatV

Ur

temps

Overheat

Disturbation…

Switchgears and SEPAM



Circuit breaker no yes yes

Interrupter no yes no

Di t

Isolate Operate Operate

services short circuit

current current

Switchgears and protection relay



Disconnecteur yes no no

Contactor no yes no

Fuse no no yes

ANSI codes



ANSI codesANSI code Function’s name Definition

12 Overspeed Detection of rotating machine overspeed

14 Underspeed Detection of rotating machine underspeed

21 Distance protection Impedance measurement detection

21B Underimpedance Back-up phase-to-phase short-circuit protection for generators

24 Flux control Overerfluxing check

25 Synchro-check Check before paralleling two parts of the power system

6 Thermostat Protection against overloads

27 Undervoltage Protection for control of voltage sags

27D Positive sequence undervoltage Protection of motors against operation with insufficient voltage

27R Remanent undervoltage Check on the disappearance of voltage sustained by rotating machines after the

power supply is disconnected



27TN Third harmonic undervoltage Detection of stator winding insulation earth faults (impedant neutral)

32P Directional active overpower Protection against active overpower transfer

32Q Direct ional react ive overpower Protection against reactive overpower transfer

37 Phase undercurrent 3-phase protection against undercurrent

37P Direct ional active under power Protection against act ive under power transfer

37Q Directional reactive under power Protection against reactive under power transfer

38 Bearing temperature monitoring Protection against overheating of rotating machine bearings

ANSI codes40 Field loss Protection of synchronous machines against faults or field loss

46 Negative sequence / unbalance Protection against unbalanced phase current

47 Negative sequence overvoltage Negative sequence voltage protection and detection of reverse rotation of rotating

machines

48 - 51LR Excessive starting time and locked rotor Protection of motors against starting with overloads or reduced voltage, and for

loads that can block

49 Thermal overload Protection against overloads

49T RTDs Protection against overheating of machine windings

50 Instantaneous phase over current 3-phase protection against short-circuits

50BF Breaker failure Checking and protection if the circuit breaker fails to trip after a tripping order

50N or 50G Instantaneous earth fault Protection against earth faults with 3 CTs or a single sensor (CT or core

balance CT)

50V I t t lt t i d h 3 h t ti i t h t i it ith lt d d t th h ld



50V Instantaneous voltage-restrained phase over

current

3-phase protection against short-circuits with voltage-dependent threshold

50/27 Inadvertent generator energizing Detection of inadvertent generator energization

51 Delayed phase overcurrent 3-phase protection against overloads and short-circuits

51N or 51G Delayed earth fault Protection against earth faults with 3 CTs or a single sensor (CT or core

balance CT)

51V Delayed voltage-restrained phase overcurrent 3-phase protection against short-circuits with voltage-dependent threshold

59 Overvoltage Protection against excessive voltage or sufficient voltage detection

59N Neutral voltage displacement Insulation fault protection

ANSI codes63 Pressure Detection of transformer internal faults (gas, pressure)

64REF Restricted earth fault differential Earth fault protection for star-connected 3-phase windings with earthed neutral

64G 100% generator stator earth fault Detection of stator winding insulation earth faults (impedant neutral power systems)

66 Successive starts Protection function that monitors the number of motor starts

67 Directional phase overcurrent 3-phase short-circuit protection according to current flow direction

67N/67NC Directional earth fault Earth fault protection depending on current flow direction

(NC: Neutral compensated)

78 Vector shift Vector shift disconnection protection

78PS Pole slip Detection of loss of synchronization of synchronous machines

79 Recloser Automated device that recloses the circuit breaker after transient line fault tripping

81H Overfrequency Protection against abnormally high frequency



q y g y g q y

81L Underfrequency Protection against abnormally low frequency

81R Rate of change of frequency (ROCOF) Protection for fast disconnection of two parts of the power system

87B Busbar differential 3-phase protection against busbar internal faults

87G Generator differential 3-phase protection against internal faults in AC generators

87L Line differential 3-phase protection against line internal faults

87M Motor differential 3-phase protection against internal faults in motors

87T Transformer differential 3-phase protection against internal faults in transformers

The SEPAM protection relay



Sepam presentation

● The SEPAM (System Electronic for Protection Automation and Measurement is a powerfulprogrammable digital protection relay. It is design to measure, analyze and monitor current,tension, frequency, temperature… in order to drive a switchgear, a contactor… This architecturefit any industrial application with motors, generators, capacitors banks, networks…

●The Sepam range is composed by 3 family:● Sepam series 20● Sepam series 40● Sepam series 80

●It provide a complete, simple and reliable solution.



p p , p

Sepam multifunction unit

CT, VTProbes

Digital input

• Measurements

• Protections functions

• Control command(local, remote)

• Diagnostic

Sepam

I

Alarme

Max de I



•Communication

•Watchdog (auto-control)

Local drive,

P.CSupervision Datation

OK

Sepam application



Sepam series 80Intelligent solutionfor complex applications

Simplicity and performance



Sepam series 40High-performing solutionsfor demanding applications

for complex applications

Sepam series 20Simple solutionsfor common applications

Sepam series 20

Metering and protection current or voltage

10 logical inputs (opto-coupler)

8 logical outputs (relay)

1 Modbus communication port

8 temperature probe inputs



2 oscilloperturbographie records

Control matrix

One software : SFT2841

Sepam series 20



Sepam series 40

Metering and protection current, voltage ,

power, directional...

10 logical inputs (optocoupleurs)

8 logical outputs (relays)


16 temperature probes inputs



Control matrix


One equation editor (logical equations)

Several oscilloperturbographie records

Sepam series 40



Sepam series 80

Metering and protection current, voltage , power,

directional, differential...

42 logical inputs (optocoupleurs)

23 logical outputs (relays)


16 temperature probes inputs

Control matrix



Control matrix


One equation editor or Logipam (option)

Several oscilloperturbographie records

Memory cartridge and backups battery

Sepam series 80



Sepam series 80



UMI types

Series 20Series 40

Series 80



Series 80

Measuring transformers



Measuring transformers for Sepam

SEPAM

Current transformers or LPCT

Toroid (earth fault)

Voltage transformers




●Measuring CT :

● Good accuracy close to nominal current● Design to protect measuring devices (by saturation)

●Protection CT● Good accuracy for high current● Wide range (tripping threshold)

Linear Zone

(no saturation)

Medium zone

Saturated zone



●One, two or three secondary(s)● Primary current from 50 to 2500 A● Be careful of the direction between P1-P2 and S1-S2

(according to the drawing)

Protection CT features

● Accuracy class

600/5 A, 15 VA, 5P 10

Primary currentSecondary current

power(precision) Accuracy class

Accuracy limit factor



y● measuring : 0,2; 0,5 or 1● protection : 5 or 10

● Accuracy limit factor ● ratio higher precise current / nominal current● 10; 15; 20 or 30

CT wiring



This wiring not allowed residualcurrent measurement

Recommended Io minimum threshold:

-0,30 In CT with DT curve-0,10 In CT with IDMT curve

(or DT and H2 restraint )

LPCT (Low power current transformer )

Secondary winding

Primairy

Integrated shunt

Twisted cable with screen

• New technology due to electronic relaylow consumption

• Wide operation range(ex: 5A - 1250 A)

• 2 functions: measurement and

protection



RJ45 plug • Accuracy guaranteed up to short circuit

(no saturation)

• Directly connected to Sepam

Toroid CSH 120 and 200


● Same features for both except inside diameter (120 mm et 200 mm)

● Caution to the direction of the coil (P1- P2 and S1-S2 or arrow on the toroid)according to drawing

● Allowed only for insulated cable



(low voltage insulation)

Toroid CSH 30


● Design to convert CT output (1A or 5A) toSepam residual current input

● Caution to the direction of the coil (P1- P2 andS1-S2 or arrow on the toroid) according to



drawing


● CSH 120 or 200

Ratio 1/470

●Recommended for detection of very lowdefault current

● CT 1A or 5A + CSH30connected to CT secondary



Recomended Io minimum threhold:

0,10 In CT (with DT curve)

Recommended Io minimum threshold :

> 1 A

CT 1A : 2 TurnCT 5A : 4 Turn


● CT 1A or 5A + CSH30connected to CT secondary

1A: 2 turn

5A: 4 turn

● Accuracy can be increase by 10 onSepam by setting In0 = In/10



Recomended minimum threshold :

0,10 InCT (with DT curve)


● ACE990 is an adaptator between MV

toroid with a ratio 1/n (50 < n < 1500) andSepam input

● This wiring allows to keep old toroid (incase of revamping for example)



Range from 0,1 Ino to 15 Ino

Toroid CHS 120 and 200

• Inside the shield of the incomer or out comer

power cable a residual current can be

generated due to various factors.

• This current could be enough to trip the

Sepam(and the circuit breaker).

• Always re-passing through the toroid a cable

connected to the shield.

• This way of cabling avoid troubleshooting

t i i d



tripping order.

i i

Voltage Transformer

●VT phase-neutral

●VT phase-phase

●Caution to the direction of the coil(P1- P2 and S1-S2 or arrow on thetoroid) according to drawing



●1, 2 or 3 transformer(s)

●Fuses integrated (option)

TP wiring

● 3 Tension phase-neutal(Standard drawing)

● 1 Residual tension(delta open)



Analog input for Sepam series 80

● Input available on all Sepam series 80:

● 3 phases current l1, l2, l3● 1 residual current l0

● 3 phase voltage V1, V2, V3● 1 residual voltage V0

● Input available according to the type of Sepam 80

● 3 other phases current l’1, l’2, l’3● 1 other residual current l’0



● 3 other phases voltage V’1, V’2, V’3● 1 other residual voltage V’0

Tripping devices for SEPAM



• Opening coil (also called opening release or shunt trip)Electric coil, single or double coil. Power supply AC or DC

• Undervoltage : This release unit causes the opening of the circuitbreaker when its supply voltage drops below a value less than 35% of therated voltage. Power supply AC or DC

Tripping devices for SEPAM



• Mitop : low consumption release, with permanent magnet.Used only with the Sepam 100 LA, VIP 3000, Satimax…Work without auxiliary power supply

Additional modules for SEPAM



Sepam modular architecture

Series 20 or 40

Series 80



●Function enhance by optional modules● To exactly fit your needs● To easily involve in the future

Add inputs and outputsSepam series 20, 40

MES 114 module

● Add to Sepam● 10 digital input

● 4 output relays

● 3 types● MES 114, inputs voltage

from 24 to 250 V DC

● MES 114 E input voltagefrom 110 to 250 V DC or AC



● MES 114 E, input voltagefrom 110 to 250 V DC or AC

● MES 114 F, input voltagefrom 220 to 250 V DC or AC

MES 114



Input /output wiring (for Sepam 20)



Add input and output

Sepam series 80● Module MES 120

● Addition of modules with● 14 logic inputs● 6 output relays

● 3 Types● Only direct current

● general case, without immunity constraintMES120

● auxiliary supply 100 or 110V VDC MES120H

● auxiliary supply >200V VDC MES120G

U t 3 d l



● Up to 3 modules● Maximum configuration:

●42 inputs (3 x 14)●23 outputs (3 x 6 + 5)

MES 120

Logic input MES 120 MES 120G MES120H





Output wiring (for Sepam 80)

● All logic outputs can be modifyaccording to the installation drawingwith software SFT2841

● The setting is done with SFT 2841● Menu Sepam setting● Input / output

Functions Outputs



Acquire temperatures

MET148-2 module

Measurement of 8 temperatures

By Pt100, Ni100 or Ni120 RTD

To protect transformers, motors andgenerators

Number of modules per Sepam

Series 20: 1



Series 40: 2 Series 80: 2

MET 148-2 (Temperature)

Line impedance matching (interlinking of

modules) RC: if the module is not the last one RC: if the module is the last one

Connection of temperature sensors to

screw-type terminals Cross-section of 0.2 to 2.5 mm² Maximum distance: 1 km Use shielded cable

• Connect the shielding at the module end

• Do not connect the shielding at the sensor end



Selection of the module number MET1: 1st module MET2: 2nd module (Series 40 and 80 only)

Compulsory connection of the earthing

terminal 2.5 mm² cable with 4 mm ring lug Length < 200 mm

Add analogue output

MSA141 module

Choice of measurement via SFT2841

Transmission format 0-10mA 0-20mA 4-20mA

1 module per Sepam



MSA 141 (Analogue output)



Connection of the analog output to screw-type

connector Cross-section of 0.2 to 2.5 mm² Maximum load impedance: 600Ω Use shielded cable

• Connect the shielding at the module end only

C l ti f th thi





Modules interlinking

Principle D on Sepam Da on module Dd on module Da on following module

Rules for series 20 & 40 3 modules maximum

DSM303 modules at end of chain The MSA141 module must be the first in the chain

Rules for series 80 3 modules maximum per chain 2 chains maximum DSM303 and MCS025 modules at end of chain Special CCA785 cord for connection of MCS025

D

DSM303

Da DdDdDa Line impedance matching (interlinking of



MET148-2MSA141


modules) RC: if the module is not the last one rc: if the module is the last one

Communication with a network

Modbus interfaces

ACE949-2: 2-wire RS 485

ACE959: 4-wire RS 485 ACE937: Optic fiber

Number of interfaces that can be

connected:

Series 20: 1 Series 40: 1

Series 80: 2



Communication network wiring

110 t 220 V

CCA612 CCA612 CCA612RS 232 – 3 wire

ACE909-2 ACE949-2 ACE949-2 ACE949-2

RCRCRC

Supervisionor SFT 2841



110 to 220 Vacpower supply50 to 60 Hz

RS 485 - 2 wire

Distributed power supply

12 or 24 Vdc

ACE 909-2 (Communication)



C l ti f th thi

Connection with screw-type connector V+ and V- 12 or 24 Vcc L+ and L- network RS 485 Use shielded cable Connect the shielding





Enable the coupling of 2 networks

MCS025 module

For substation, transformer, generator andbusbar applications

Control between 2 different network Voltage Frequency Phase

Configuration via Sepam unit

3 output relays for enable coupling via



circuit breaker

MCS025 wiring

Sepam 80

MCS025Circuitbreaker drive

ANSI94/69

SynchroCheck

ANSI 25

Measuring

OutputsCouplingenable



e ab e

Input Couplingenable

Additional Sepam 100 modules

Sepam 100 modules complete the Sepam range and can be installed separately or

combined with a Sepam protection relay, Sepam 2000, Sepam series 20, 40 or 80.

Sepam 100 MI : Cubicle local control andindication modules (various block diagramsare available)

Sepam 100 LD : High impedance differentialprotection

Sepam 100 LA : Self-powered protection(back-up protection without auxiliary power



supply)

SEPAM front panel



Description of advanced UMI

PCconnection GreenON LED Red Fault LED 9 indicationLEDs

Metering

Switchgear, networkand machine diagnosis

Alarms

LED test

Acknowledge and clear alarms

Reset SepamConfirm user choices

Move cursor up



LED test

Entry of password Setting of protection functionsactivated via SFT2841

Sepamcharacteristics

Move cursor down

Description of mimic-based UMI

Cartridge Battery

PC ti

Close switchgear

Open switchgear

Confirm user choices

Move cursor up

Move cursor down



PC connection

3-positionselector switch Mimic diagram

IHM Mimic

● The Key show the Mimic diagram

● All information are shown in the screen

● Moving installation diagram● All measurement needed

● All equipment controlled by Sepam can beoperate by front panel

Feeder N°12



Operate switchgears by Sepam front panel

● Place the selector in local or test position

● Keys and enable to select switchgears to operate.● Sepam control that this equipment is allowed to operate

● If operation is allowed, confirm by pressing key

● A windows surrounding the switchgear is flashing

● Operate the device by pressing the ON or OFF button

Operationallowed

Operationprohibed

Opening



Opening

Closing

Mode selector

●3 modes are available

● REMOTE mode

●drive with supervision system are enable

●drive with Sepam front face are enable but can bedisable by one variable

● LOCAL mode

●drive by supervision system are enableexcept closing order

●drive by Sepam front face are enable

● TEST mode

th l l d



●same than local mode●None remote signal (TS) is send to supervision

The Sepam loop

Example :

● Press the measuring button :

● A new screen appeared with a loop :

● Select the folder needed by :

or

Current

Frequency

Energy

Voltage

Power

Measuring



● Valid the choice by :

Rules of use

Chosen directly from a series of

screens in a loop:

After chosen one menu(Current for example) Press the function key to navigate

inside the second loop Inside some menu the clear key can

be use to reset the memory

Current

I RMS

Bar graph

I Max

I Average

Io



Io ∑

Current operations

3 Keys

Metering : to display the variables measured by Sepam

Diagnosis : to provide access to diagnostic data on the breaking device and additionalmeasurements to facilitate fault analysis.

Alarms : to consult the 16 most recent alarms that havenot yet been cleared.

Advanced

UMI

MIMICbase UMI



Operating functions

3 Keys

Reset : to reset latched information

Clear : to acknowledge the active alarm, reset the peak demand measurements or clear the alarm history

Test lamps : to test the LEDs and the display

Advanced UMI

mimic-based UMI



Reset

The “reset” key is used to reset latched

information.

extinction of signal lamps resetting of protection units after the disappearance of

faults.

Sepam resetting must be confirmed (Sepam series

40 & 80 only).

Be carful : The alarm messages are not deleted

and will come back again !



Clear

The “clear” key is used

When an alarm is present on the Sepam display

• Acknowledge the active alarm – return to the screen that was present prior to the

appearance of the alarm or to a less recentunacknowledged alarm

• Sepam is not reset.

In the metering or diagnosis menus

• reset the average currents, peak demand currents,running hours counter when they are shown on thedisplay.

In the alarm menus

• Clear the alarm history when they are shown on the



y ydisplay.

Parameters and protections setting

2 Keys

Status : to display and enter the Sepam general settings

Protection : to display and set the protection units,to enable or disable the protection units (Sepam series 20 & 40 only).

Advanced

UMI

MIMICbase UMI



3 categories of users

Operator

Access to all data in read mode only Clear/Reset actions

Personnel qualified to set protection functions

Know the “Setting” code (1 key) Operator + access to protection settings

Personnel qualified to set Sepam parameters

Know the “Parameter” code (2 keys) Operator + access to protection settings + access to Sepam parameters



SEPAM wiring and installation



Base unit

Simple flush mounting in panel Held by 2 mounting clips

Fixed by plastic spring clips

The direction in which the spring clips are

mounted depends on the thickness of the

mounting plate.



Base connectorsSepam 20 et 40

● A connector ● Auxiliary power supply● Ground● 1 residual current input● 4 outputs

●O1 and O2: Power output (8A)●O3 and O4: signalization (2A)

● B connector Sub D9● CCA630 for CT● CCA670 for LPCT

● C and D RJ45 connectors● Communication port Modbus●

Connection for auxiliary modules

● E connector I f VT ( i 40 l )



● Input for VT (series 40 only)

Base connectorsSepam 80

● A connector ● Auxilary power supply● Ground● 5 outputs

●O1 to O4: Power outputs

●O5: signalizsation

● RJ45 connectors● 2 communication ports Modbus● 2 connection for auxilary modules● 1 réserved (F)

● E connector ● Input for VT

(V1 V2 V3 or U21 U32)

I’o Io G Vo V3 V2 V1

05

04

03

02

01

C2 C1 F

D2

D1



(V1,V2,V3 or U21,U32)● 2 residual current inputs● 1 résidual voltage input

Base connectorsSepam 80

● 3 phases current inputs

● 3 other phases current inputs

● I101 to I114, O101 à O106● 14 inputs, 6 outputs

●Ox01: Power output●Ox02 à Ox06: signalization

● I201 à I214, O201 à O206● Idem

● I301 à I314 O301 à O306

B1

H1

H2

H3

B1

B2

B2



● I301 à I314, O301 à O306● Idem

H1H2H3

Sensors wiring for Sepam 80



Base power supply requirements

Series 20 and 40

Nominal range : 24 - 250 VDC or 110 - 250 VAC (47.5 / 63 Hz) Absolute range ( -20 / +10% )

Series 80

Accept only DC voltage supply Nominal range : 24 - 250 VDC Absolute range ( -20 / +10% )

Focus on DC supply :

• Rectified only should not be used because it will reduce lifetime



Rectified only should not be used because it will reduce lifetime• Acceptable ripple content on DC voltage : 12%

SEPAM and circuit breaker wiring

Q

Closing (Sepam)

Inhibit closing(Sepam)

External Externalclosing tripping

Inhibit closing(external)



Closing Anti pumping Opening

Trip circuit supervision

Normal circuit:

Device D closed, input I12 is excited,input I11 is not excited.

Device D open, input I12 is not excited,

input I11 is exited.

Default circuit :

I11 and I12 get a different position

After 200 ms if there is no change on I11 and I12or if inputs I11 and I12 are not correct SEPAM

send the message ”Control fault or TCS”

This function check the complete tripping circuit (equipped withshunt trip coil) and the auxiliary power supply



Breaker failure supervision (ANSI 50BF)

Description:

The "breaker failure" protectionfunction is activated by an O1 outputtripping order

It checks that current disappearedduring the time delay T

It may also take into account theposition of the circuit breaker, readon the logic inputs

After that time the Sepam activateone of its output in order to trip another circuit breaker

If a circuit breaker fails after a tripping order (detected by the non-extinction of the faultcurrent), this backup protection send a tripping order to the upstream or adjacent breakers.



Software SFT2841



Software SFT2841

SFT2841 V10.3

2 operating modes not connected connected to Sepam

Windows XP and Vista

On-line help available

For commissioning, the SFT2841 tool is useful for Series 20

recommended for Series 40 essential for Series 80



CD Sepam V10.3

SFT2841 v10.1

Readme.txt

Lisezmoi.txt

InstallDemo

SFT2826v0202

Readme.txt

Lisezmoi.txt

Install

DisksDocumentation

English



English

French

Sepam software installation

After inserting the CD, autorun displays

this screen.

You may choose:

SFT2841 installation

SFT2826 installation (curves viewer)

Presentation of the Sepam offer Sepam range application solutions documentation d t i l t ti



product implementation different specifications per application order form

Code entry

SFT2841 may be installed in demonstration

version or full version

Demonstration version no serial number requested connected mode disabled file saving disabled

Full version enter the serial number on the label stuck on the

back of the CD box• format: XXXXXXX-XX



Starting SFT2841

Click on the icon

Select the working language

Choose the operating mode:

connected• point to point via the front panel

• via the network

disconnected (according to Sepam)• create a new file



• or edit an existing file

Toolbar

Password To change the categorie of users

Open a new file

Open an existing file

Save a current file File extension

• series 20, rpg• series 40 and 80, type of Sepam (e.g. M41)

Print a report Séries 20 & 40 : Text file, all the parameters are

listed



Séries 80 : Word file with cover page, contents andstructured presentation of parameters

Toolbar

Sepam parameter setting setup environment automation inputs / outputs

Protection setting

Equation editor

Control Matrix

Function setting disturbance recording mimic diagram

Guided navigation for logical sequencing of screens



Toolbar

Sepam diagnosis Software versions Sepam status Presence of modules Testing of 3s pulse outputs

Measurements All the measurements available on the Sepam type

Network diagnosis Phase displacement Number of trips

Switchgear diagnosis Cumulative breaking current Number of switchgear operations

Alarm management Current alarms Alarm history (200 alarms)

Disturbance recording Recovery of recording Selection by date Voluntary trigger



Machine diagnosis Starting the SFT2826 Software

Software help

In any SFT2841 menu

Just click on the topinterrogation point

to get help

The user manual will be open

automatically in the good

page

Scroll pages and find your

answer !



Download Sepam program

To save in a file all the data from a Sepam



Download / load Sepam program

●To save Sepam program ona computer

●Menu Sepam Download(Sepam-pc)

●Save as …



Print a report

●Fill identification form for each Sepam

●Print or save in an other file

( pdf…)



Print a report

● Text type file

● All parameters availables

Sepam xxxx (21/03/2006)

Propriétés du dossier Client : Formation Affaire : Série 20, 40 & 80Tableau : Dossier Cellule : Série 20Date d'impression : 27/03/06

Configuration matérielle du Sepam

Type d'application : Sous-station (S20)Repère du Sepam : Sepam xxxxModèle de Sepam : Modèle UD (avec IHM avancée fixe)MES (Module d'entrées / sorties) : MES114 (Module 10E + 4S)MSA141 (Module 1 sortie analogique) : AbsentDSM303 (Module IHM avancée déportée) : AbsentInterface de communication : AbsentMode synchronisation : Réseau

Paramétrage des sortiesUtilisée Bobine à émission Bobine à manque Mode impulsionnel

O1 Oui X

O2 Oui XO3 Oui XO4 Oui XO11 Oui XO12 Non - - -O13 Non - - -

Série 20 & 40

Série 80

● Front page● Contents● Presentation of all parameters by

chapters● Word type files● …



O14 Non - - -

Print a front label

●Fill boxes for each LED

●Menu SepamEdit label

●Menu FilePrint label



Modify or create of new messages

● On the matrix menu , click onevent

● Select the tab Protections, Logic,Inputs or Equations

● Double-click on empty space or existing message to modify or create it

Alarms messages and operation message can be modifyed with SFT 2841 software.These new

messages can be affected with the matrix.




• A new screen appeared

• You can affect a pre-definedmessage by double click on his

number

• You can also modify an existingmessage: Just click on it and select‘’create message”

• You can also create a new

message : just click on the button‘’create message” and then doubleclick on this new message



• Click on the number corresponding to the messageand then to ‘’affect’’

• Click on OK to load the newmatrix on the Sepam

• The bitmap Windows alowd to write atext or create a drawing




The control matrix

● The control matrix allowed to affecteasily

● Protection functions● Logic functions● Inputs

● Logipam● to others Sepam functions :

● Logical outputs● Front L.E.D● Messages

● Oscilloperturbo-graphic records

● Each columns realize an ORfunctions between each column anlines



Logic button on control matrix

Closing Closing by switchgear control function By default on O3. Only available if switchgear control is in circuit breaker mode

Tripping Tripping by switchgear control function Forced on O1, if switchgear control is in circuitbreaker mode

Inhibit closing Inhibition by switchgear control function By default on O2. Only available if switchgear control is in circuit breaker mode

Pick-up Logic OR of the instantaneous output of allprotection Except protections 38/49T, 48/51LR, 49 RMS,64G2/27TN and 66.

Drop-out A time delay protection has not come backto 0

TCS fault Trip circuit fail

CCS fault Closing circuit fail

Logic discrimination trip Tripping order sent by logical

discrimination

Only when logic discrimination is used without

switchgears control function

Blocking send 1 Blocking order sent to next Sepam By default on O102

Load shedding Load shedding order sent Motor application



Measurements functions



Current

Phase current

This function gives the RMS value of each phase current.

Residual current

This function gives the RMS value of the residual current obtained by one of the following methods:• measurement

• calculation of the sum of the phase currents

Average current and peak demand phase currents

This function gives:• the average RMS current for each phase obtained for each integration interval.• the greatest average RMS current value for each phase obtained since the last reset.

Adjustable integration interval: 5, 10, 15, 30, 60 mn.



Average current and peak demandphase currents

Resetting to zero: via the clear key on the display if one of the two screens is displayed, via the clear command in the SFT2841software, via the communication.

A

t

5mn

55A 63A 89A 78A 59A

100A

Average current

5mn 5mn 5mn 5mn

A

t55A 63A 89A 89A 89A

100A

Peak demand current

5mn5mn5mn5mn5mn



Pick current, RMS, and true RMS

● RMS Current:

● This is the average value of an alternative currentthrew a resistor *

● For a sinus waveformIrms = Imax / √2

●True RMS Current● For a non sinus waveform

Itrue rms =

● In case of square waveform the differenceb t RMS d t RMS l l ill b 11%



between RMS and true RMS calculus will be 11%

* (120A AC RMS = 120A DC)

Voltage

Phase-to-phase voltage

This function gives the RMS value of each phase-to-phase voltage obtained:• by calculation when 3 phase-to-earth VTs are connected,• by measurement (U21 and U32) and by calculation ( U13 ) when 2 phase-to-phase VTs are

connected,• by measurement (U21) when a single phase-to-phase VT is connected, in which case the U32

and U13 voltages are not available.

Phase-to-neutral voltage

This function gives the RMS value of each phase-to-neutral voltage obtained:• by measurement when 3 phase-to-earth VTs are connected,• by calculation when 2 phase-to-phase VTs are connected and the residual voltage is measured.

Residual voltage This function gives the value of the residual voltage Vo obtained by one of the following methods:

• calculation of the sum of the 3 phase-to-neutral voltages,• measurement, using an open star-delta VT.



Power

This function gives the following power values:

active P = √3.U.I.cosϕ reactive Q = √3.U.I.sinϕ apparent S = √3.U.I

The calculation is based on the following data:

phase currents I1 and I3, phase-to-phase voltages U21 and U32, if only the U21 voltage is connected, the network voltage is

considered to be balanced.

The "Type of cubicle" Incomer or Feeder parameter influences the sign of the

measurement.



Power factor (cosϕ)

This function gives the phase displacement between the phase currents and phase-to-

neutral voltages.

V

Iϕ

Q

P

+IND

+CAP

-CAP

-IND



Switchgear diagnosis functions

Cumulative breaking current and number of operations This function gives:

• total cumulative breaking current in square kilo amperes,• for five current ranges (0 to 2, 2 to 5, 5 to 10, 10 to 40 and >40 In),• total number of opening operations.

The function is activated by trip orders (O1). The values are saved in the event of a power failure.

The initial value may be initialized using the SFT2841 software.

Operating time This function gives the time between the trip order (O1) and the change of status of the "device open"

position contact. The value is saved in the event of a power failure.

Charging time This function gives the time between the change of status of the "device closed" position contact (I12)

and the appearance of the end of charging information. The value is saved in the event of a power failure.



Protections functions



SEPAM

I>Ist 0I S

Si

St

Protection system diagram



t

S

t

I ou U

Is

∆I {

Protection relay hysteresis

I>IsI

Si

St

Hysteresis = (Is - ∆I).100Is

Approximately 93 %

S

T



Minimum détection time

I>IsI

Si

St t

t

t

t

T < Mdt

Is

S

Si

St

S

Minimum detection time(approximately) 25 ms

T



Operating time (short default)

I>Is TI

Si

St

Mdt : Minimum detection time

Itd : Instantaneous trip delayMtd+10ms=35ms

Td : Trip delay

S

t

t

t

t

Is

S

Si

St

Mdt

Itd

Td



Operating time (with permanent fault)

I>IsI

Si

St

Mdt : Minimum detection time

Itd : Instantaneous trip delayMtd+10ms=35ms

Td : Trip delay

S

t

t

t

S

Si

St

Is

Mdt

Itd

Td

T



Group A and Group B

Two groups called Group A and Group B of units are available for the folowing

protection functions :

Phase overcurrent (50/51) Earth fault (50N/51N or 50G/51G) Directional phase overcurrent (67) Directional earth fault (67N)

Number of units :

50/51 50N/51N

50G/51G

67 67N

Series 20 2 2 0 0

Series 40 4 4 2 2

Series 80 8 8 2 2

t

I

1

1

Example:2 groups of 2 units



DT curves

Definite time

Current threshold :

Is is the operation set point

Delay :

T is the protection operation timedelay



IDT curves (Inverse Definite Time)

There are several types of IDT curves,

determined by equations and defined by

the various standardization organizations:

for example, the IEC defines standard inverse time (SIT), very inverse time (VIT), extremely inverse time (EIT).

Current setting Is which corresponds to

the vertical asymptote of the curve

Time delay T which corresponds to the

operation time for I = 10 Is.



IDT curves



Example of calculus:

● An engine get an SIT protection curve. Settings are :Is = 1000 A and T=4 s. We wants to know the trippingtime for a current of I de 3500 A.

● Solution:● We use an SIT curve

● I/Is =3500/1000 = 3,5● We are going to find on the table value of k corresponding● With it we can make the calculus :

t=T.k so :t = 4x1,858 = 7,43 s

Tripping time for a current of 3500 A will be :

7,43 seconds.



Customized curve

●Available with Sepam 80

●Define dot by dot with

SFT2841 software(Application menu)

●This curve allowed to fit all

specific applications● Discrimination

● retrofit



Holding time

Trip threshold

Time

I > Is

holding time = 0

holding time with SIT curve (disc relay)

holding time with DT curve (coil earth syst)



Harmonic 2 restraint

50N/51N function (Advanced Parameters)

H2 restraint to ensure stability during transformer energization.

Fixed ratio (17%) restraint activated by parameter setting

This function has to be used only in the case of earth fault overcurrent made by sum of

3 CT on the upstream side of a transformer.



Directional phase over current (67)

The polarization value is the phase-to-phase value in quadrature with the current for cos = 1 (90° connection angle).ϕ

U32 for I1, U13 for I2 and U21 for I3

A phase current vector plane is divided into two half-planes that correspond to the line

zone and busbar zone.

The characteristic angle θ is the angle of the perpendicular to the boundary line

between the 2 zones and the polarization value.

I1

I1

I1

Fault tripping in line Fault tripping in busbar No fault tripping



Directional earth fault (67N)

Earth fault protection, with selective tripping according to fault current direction.

Picks up if the earth fault current in the chosen direction (line or busbar) reaches the

operation set point

3 types of protection function

Type 1, for radial feeders in resistive, isolated or compensated neutral systems Type 2, for closed ring distribution networks with directly earthed neutral. Type 3, for distribution networks in which the neutral earthing system varies according to the

operating mode.

The polarization value is the residual voltage V0



Thermal overload (49RMS)

This function is used to protect equipment (motors, transformers, generators, lines,capacitors) against overloads, based on measurement of the current consumed.

Principle: heat rise calculation is based on the current consumed(if I is constant, heat rise is equal to the square value of the current ratio E=( I / Ib )²

User informationThe following information is available for the user: time before restart enabled (in case of inhibition of starting) time before tripping (with constant current) heat rise.

With I=IbWith I=0



49 thermal overload

T1

E=120%

E= 63%

E=100%

t

t = Tripping time from the hotcurve (E=100%) depending onT1 and on the value of the current

CB tripping

E=100% when I=Ibduring an infinite time

T2

E= 36%



Excessive starting time (48-51LR)

Starting is detected when current goes over 10% of Ib.

Is is set lower than the value of starting

current and ST longer than normal starting

time.

If the consumed current is higher than Isduring a time longer than ST the CB trips.



Locked rotor (48-51LR)

If the current exceeds Is without going under and over 10% of Ib this is a case of locked

rotor.

LT must be set with a time delay shorter than

the locked rotor time given by the motor

manufacturer

To protect the motor in case of locked rotor during starting it’s possible to use an external

zero speed switch relay.

If the motor speed is zero the CB trips with LTS

time delay which is shorter than ST.

Excessivestarting time

STLTS

Locked rotor during start



Starts per hour (66)

This function picks up when the number of starts reaches the following limits : Nt- maximum number of starts allowed per period of time P (from 1 to 6 hours) Nh-maximum allowed number of consecutive hot starts Nc-maximum allowed number of consecutive cold starts

T = time delay between stop and start (from 0 to 90mn) in documentation : time between

starts

Measurement:

waiting time number of starts allowed

Motor hot state : 50% heat rise (70% Ib)



Remanent under voltage (27R)

After a loss of power supply, motors sustain voltage on busbar.

The fast re-energizing can cause transient electrical and mechanical phenomena.

This protection function is used to give closing authorization to power supply

changeover.

Setting the protection function :



Disturbance recording



Disturbance recording function

● The disturbance recording is a capture of waveform composed by:● Analogical signals (Currents, Voltages)● Logical inputs and outputs.

● The beginning of this record is started by a trip event● After that trip the record continue during the time set in the Sepam

Record stack on memory

Trip event

Number of pre-trig periods



Set up a disturbance record

● Records features● 2 records maximum● 86 periods● 4 channels current or tension

● 10 logical inputs● O1 outputs● pick-up

●Pre-trig adjustment

Series 20



Set up a disturbance record

● Records features● All analogical channels● 10 logical inputs● O1 to O4 outputs

● pick-up● 1 variable for logic equation

● Record setting depending of memory● Number of records● Length of each records

● Pre-trig adjustment

Series 40



Set up disturbance record

● Analog records features● All analogical channel are available

● Logic inputs records features● All logic inputs are available

●Pick up

●Flag rec: logical equation or Logipam●Black finger : channel available●Grey finger : still selected

● Record setting depending of memory● Number of records● Length of each records● Number of samples

● Pre-trig adjustment

Série 80



Displaying disturbance records

● Click on Disturbance recordingbutton

● Click on the record that you want tosee

● Click on the downloading button to

transfer the record to the PC● Save as …the record on the PC● To display the curve click on the

viewer program to launch it● On the SFT2841

● File, open…● Select the record

● Then open



Disturbance recording




And join us to build a new electric world *

http://schneider-electric.fr


construire un nouveau monde électrique.



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