8/2/2019 2008_ac0458en_LD

1/20

Sepam 100 LD

Electrical network protection

High impedance differential protection

Catalogue2008

8/2/2019 2008_ac0458en_LD

2/20

A new path for achieving your electrical installations

A comprehensive offer

The Sepam 100 LD range is part of a comprehensive offer of products that are perfectly

coordinated to meet all medium and low voltage electrical distribution requirements.

All of these products have been designed to work together: electrical, mechanical

and communication compatibility.

The electrical installation is thus both optimised and has improved performance:

@ better service continuity,

@ increased personnel and equipment safety,

@ guaranteed upgradeability,

@ efcient monitoring and control.

You therefore have all the advantages at hand in terms of know-how and creativity

for achieving optimised, safe, upgradeable and compliant installations.

Tools for facilitating the design and installation

With Schneider Electric, you have a complete range of tools to help you get to know and

install the products whilst complying with current standards and good working practices.

These tools, technical sheets and guides, design software, training courses, etc are

regularly updated.

For a real partnership with you

A universal solution doesnt exist because each electrical installation is specic.

The variety of combinations on offer allows you to truly customise the technical solutions.

You are able to express your creativity and put your know-how to best advantage

when designing, manufacturing and exploiting an electrical installation.

Schneider Electric is associating itself with

your know-how and your creativity to produce

optimised, safe, upgradeable and compliant

installations

8/2/2019 2008_ac0458en_LD

3/20

Presentation 2

Highimpedancedifferentialprotection 3Specifyingthesensors 4

Surgelimiter 6

Descriptionandconnection 7

Connectiondiagramsoftheaccessories 8

Exampleofapplications 9

Characteristics 10

Installation 11

Commissioning 13

Orderfrom 14

ContentsSepam 100 LDSepam 100 LD

AC0458EN.indd 1

8/2/2019 2008_ac0458en_LD

4/20

Sepam 100Sepam100isagroupofmodulesthatmaybeused:

separatelytoperformafunction

incombinationwithaSepamprotectionrelay.Eachmodulehasbeendesignedtoperformacompletefunction.

Itincludesalltheelementsrequired,suchas:

trippingoutputrelays

annunciation,settings

connections.

Sepam 100 LDSepam100LDisahighimpedancedifferentialrelay.

Itprovidesrestrictedearthfault,busbarandmachineprotection.

Advantagesstabilitywithrespecttoexternalfaults

sensitivitytointernalfaultsspeed(typicalresponsetime:15msto5Is)

outputswithorwithoutlatching

localandremoteacknowledgment

highlevelofimmunitytoelectromagneticinterference.

DescriptionSepam100LDisavailablein4versions:

single-phaseforrestrictedearthprotection

three-phaseforbusbarandmachineprotection

50or60Hz

50Hzsingle-phase:100LDX51

50Hzthree-phase:100LDX53

60Hzsingle-phase:100LDX61

60Hzthree-phase:100LDX63.

ThefrontofSepam100LDincludes:

2signallamps:

poweronindicator

latchingtripindicatorindicatingoutputrelaytripping

protectionsettingdial

resetbuttonforacknowledgingoutputrelaysandthetripindicator.

Whenthebuttonisactivated,thetripindicatorundergoesalamptest.

ThebackofSepam100LDincludes:

input/outputconnectors:

an8-pinconnectorfortoroidinputsandremoteacknowledgment

an8-pinconnectorfortrippingoutputsandpowersupply

a4-pinconnectorfortrippingoutputs

a microswitch used to congure the relay with or without latching.

Sepam100LDhas:

1or3currentinputswithacommonpointaccordingtowhetheritisasingle-phase

orthree-phaseversion

alogicinput(isolated)forremoteacknowledgment

trippingoutputrelaywith5contacts

3normallyopencontactsand2normallyclosedcontacts).

Sepam100LDoperatesin5voltageranges(pleasespecifywhenordering):

24-30Vdc

48-125Vdc

220-250Vdc

100-127Vac

220-240Vac.

Sepam100LDisassociatedwithastabilizationplate(or3plates)withvariable

resistance,enablingoperationwith1Aor5Atransformers.

b

b

b

b

b

b

b

b

bb

b

b

b

b

b

b

b

v

v

b

b

b

v

v

v

b

b

b

b

b

b

b

b

b

PE41200

Sepam 100 LD

DE40950

Sepam 100 LD: front panel

PE41200

Sepam 100 LD

DE40950

Sepam 100 LD: front panel

PresentationSepam 100 LDSepam 100 LD

AC0458EN.indd2

8/2/2019 2008_ac0458en_LD

5/20

Operation curve

DE

40949

SettingsSettings Setting values

SettingcurrentIs 5to40%Inbystepsof5%In

40to80%Inbystepsof10%In

Thedialonthefrontofthedeviceisusedforsetting

Stabilizingresistorplate Rs=0to68 P=280W

Rs=0to150 P=280W

Rs=0to270 P=280W

Rs=0to470 P=180W

Rs=0 to680 P=180W

Accuracy / performance

Setting 5%

Pickup(%) 93%5%

Responsetime y10msforIu10Isy16msforIu5Is

y25msforIu2Is

Memorytime y30ms

Parameter settingMicroswitchSW1,accessibleonthebackofSepam100LD,isusedtochoosewithorwithoutlatching.

Without latching:

With latching:

High impedance differentialprotection

Sepam 100 LDSepam 100 LD

AC0458EN.indd 3

8/2/2019 2008_ac0458en_LD

6/20

Specifying the sensorsSepam 100 LDSepam 100 LD

Current transformersToensurethestabilityandsensitivityofSepam100LD,thestabilizationresistorand

characteristicsofthecurrenttransformers(CTs)arecalculatedasfollows.

Choice of current transformersalltheCTsmusthavethesametransformationration

theknee-pointvoltagesarechosensothat:

Vk > 2 x (R + Rf) x isc

Choice of stabilizing resistor

Surge limiterTheapproximatevoltagedevelopedbyaCTintheeventofaninternalfaultis:

V = 2 2 x Vk x (isc x (R + Rf + Rs) - Vk)Ifthevalueexceeds3kV,itisnecessarytoaddanRlsurgelimiterinparallelwiththe

relayandstabilizingresistorinordertoprotecttheCTs(see:surgelimiter).

Protection sensitivityTheCTsconsumemagnetizingcurrentandthesurgelimiter,wheninstalled,creates

faultcurrent.Theminimumresidualprimarycurrentdetectedbytheprotectionis

therefore:

Id = n x (im1 + i

mp + if + is)

with

im

1,im

parereadontheCTmagnetizationcurvesatV=Rsxis

ifisthetotalearthleakagecurrentofthesurgelimiterforVs=Rsxis,i.e.thesum

oftheearthleakagecurrentsoftheNlimiterunitsinstalledinparallel:if=Nxib

(see:surgelimiter).

Example 1: Restricted earth (single-phase relay)Data:

Iscprimary=8kA

n:400/1A

R=2,4CTssituated60mfromtherelays

connectedby6mm2wiring(copper)

numberofsensorsinparallel:4(same)

setting:Is=20%In,is=0.2A.

CT knee-point voltageisc=8000/400=20A

(R+Rf)xisc=(2,4+0,4)x20=56V

Vk>2x56=112V

e.g.:Vk=140V.

Stabilizing resistor

280 < Rs 350

Theresistanceisadjustablefrom0to470 .Itissetto300.

Surge limiter ?V = 2 2 x 140 (20 (2.4 + 0.4 + 300) - 140)

V = 2574 V < 3 kV

Itsnotnecessarytoinstallasurgelimiterinparallel.

Minimum primary default current detected by the protectionForV=Rsxis=60V

TheCTmagnetizationcurveindicatesim=10mA

Id = 400 (4 x 0.01 + 0.2) = 96 A

b

b

b

b

b

b

b

b

b

b

b

DE40947

n: CT transformation ratio

p: Number of CTs

Rf1, Rf2: Wiring resistance on either side of Rs

Rf = max (Rf1, Rf2)

R1, ...Rp: CT secondary resistances

R = max (R1, ...Rp)

Rs: Stabilizing resistor

Rl: Surge limiter

isc: Maximum external short-circuit

current in CT secondary winding

is : Protection setting (A)

if: Current in Rl

im1, i

mp: CT magnetizing currents

Vk1, Vkp: CT knee-point voltages

Vk = min (Vk1,...Vkp)

DE40947

n: CT transformation ratio

p: Number of CTs

Rf1, Rf2: Wiring resistance on either side of Rs

Rf = max (Rf1, Rf2)

R1, ...Rp: CT secondary resistances

R = max (R1, ...Rp)

Rs: Stabilizing resistor

Rl: Surge limiter

isc: Maximum external short-circuit

current in CT secondary winding

is : Protection setting (A)

if: Current in Rl

im1, i

mp: CT magnetizing currents

Vk1, Vkp: CT knee-point voltages

Vk = min (Vk1,...Vkp)

R + Rfis

x isc < Rs Vk2 x is

Rf=0,020 x ( 2x 60 )6

=0,4

560,2

< Rs 140

(2 x 0,2)

AC0458EN.indd4

8/2/2019 2008_ac0458en_LD

7/20

Specifying the sensorsSepam 100 LDSepam 100 LD

Example 2: Busbar differential protection (three-

phase relay)

Data:switchboardwith10cubiclesincomerandfeeder,withoutcoupling

Isc=30kA

n:2000/5A

R=1.76

CTssituated15mfromtherelays

connectedby2.5mm 2wiring(copper):

numberofsensorsinparallel:10(same)

setting:is=50%In,is=2.5A.

CT knee-point voltage

isc=30000x5/2000=75A(R+Rf)xisc=(1.76+0.24)x75=150V

Vk>2x150=300V

e.g.:Vk=320V.

Stabilizing resistor

60 < Rs 64 Theresistanceisadjustablefrom0to68 .Itissetto64.

Surge limiter ?V = 2 2 x 320 (75 (1.76 + 0.24 + 64) - 320)V = 3443 V > 3 kV

Itsnotnecessarytoinstallasurgelimiterinparallel.

Minimum primary default current detected by the protection

ForV=Rsxis=160V

TheCTmagnetizationcurveindicatesim=20mA.

Theleakagecurrentcurveofthesurgelimiterindicatesil=4mA.

Thenumberofsurgelimitersis:

b

b

b

b

b

b

b

b

1502,5

< Rs 320

(2 x 2,5)

Rf=0,02 x ( 2x 15 )2,5

=0,24

N 7540

=2,hence

Id =2000

5(10 x 0,02 + 0,004 + 2,5) = 1083 A

AC0458EN.indd 5

8/2/2019 2008_ac0458en_LD

8/20

Surge limiterSepam 100 LDSepam 100 LD

Ifthecalculationshaveshownthatitisnecessarytoinstallasurgelimiterinparallel

withtherelayandRstoprotecttheCTs,itisdeterminedasfollows..

Choice

Standard referencesthesurgelimitersonofferconsistoflimiterblockswhichareindependentofeach

other.Eachblockacceptsamaximumcurrentof40ARMSfor1s.Byinstallingthe

blocksinparallel,itispossibletoobtaintheappropriatelimiterfortheapplication.

therearetwostandardreferences:

asinglemodule,comprisingoneblock

atriplemodule,comprisingthreeindependentblockswhicharealigned.

Calculation of the number of blocks per phaseAccordingtoi,max.RMSshort-circuitcurrentinthesecondarywindingofaCT,the

numberofblocksrequiredperphaseiscalculated:

forathree-phaserelay,Ntriplemodulesshouldbeordered

forasingle-phaserelay,Nblocks,madeupoftripleandsinglemodules.

Example 1max.RMSshort-circuitcurrentintheprimarywindingofaCT

witharatioof1000:60kA

calculationofthenumberofblocksperphase:

modulestobeordered:

2triplemodulesforathree-phaserelay

2singlemodulesforasingle-phaserelay.

Example 2max.RMSshort-circuitcurrentintheprimarywindingofaCTwitharatioof400:50kA

single-phaserelay.

calculationofthenumberofblocksperphase:

modulestobeordered:

1triplemodule+1singlemoduletohave4blocksinall.

Earth leakage currentAlimiterblockacceptsamax.steadystatevoltageof325VRMSandpresentsan

earthfaultcurrentlb:

b

b

v

v

b

b

b

b

b

v

v

b

b

b

b

DE40946

DE40946

N

l

40

N 60000

(1000 x 40)= 1,5 ,henceN = 2

N 50000

(400 x 40)= 3,1 , hence N = 4

AC0458EN.indd6

8/2/2019 2008_ac0458en_LD

9/20

Description and connectionSepam 100 LDSepam 100 LD

Rear panel Functional and connection diagram

DE40945

DE

40944

0A : 8-pin CCA608 connector(torold and remote reloading inputs); screw terminal wiringwith 0.6 to 2.5 mm2 wires, each terminal being capable ofreceiving two 1.5 mm2 wires.

Note: only 0A1 and 0A2 terminals are available in the single-phase version.

Terminal identifcationEach terminal is identied by 3 characters.

DE40943

1A : 8-pin CCA608 connector(power supply and annunciation and tripping outputs);screw terminal wiring with 0.6 to 2.5 mm2 wires, each terminalbeing capable of receivingtwo 1.5 mm2 wires.

1B : CCA604 connector ("annuciation" outputs);screw terminal wiring with 0.6 to 2.5 mm2 wires, each terminal

being capable of receiving two 1.5 mm2 wires.t

:groundterminal

1 A 4

Boardslotnumber(0to1)

Connectorterminalnumber

Connectoridentificationletter(AorB)

1 A 4

Boardslotnumber(0to1)

Connectorterminalnumber

Connectoridentificationletter(AorB)

AC0458EN.indd 7

8/2/2019 2008_ac0458en_LD

10/20

Stabilization plateConnectionofCTsandsurgelimiters:

5Arating:betweenterminals1-2and3-4

1Arating:betweenterminals1-2and5-6

DE10418

items1to6:clampscrewconnectionsfor6mm 2wire

items1,2:secondaryofCSH30corebalanceCT,connectedto0A

Wiretobeused:

sheathed,shieldedwire

min.cross-section0.93mm2(AWG18)(max.2.5mm2)

resistanceloadperunitlength

8/2/2019 2008_ac0458en_LD

11/20

Example of applicationsSepam 100 LDSepam 100 LD

Restricted earth protection (single-phase)

1A CTDE40942

Busbar protection (three-phase)

5 A CT - with surge limiters

DE40941

Note: = correspondence between primary and secondary connections (e.g. P1, S1).

AC0458EN.indd 9

8/2/2019 2008_ac0458en_LD

12/20

CharacteristicsSepam 100 LDSepam 100 LD

Electrical characteristicsAnalog inputs ( with plate)

Constantcurrent 10ln

3sec.current 500ln

Logic input ( remote reset)

Voltage 24/250Vdc 127/240VacMaximumpowerconsumption 3.5W 3.7VA

Logic outputs

Constantcurrent 8A

Voltage 24/30Vdc 48Vdc 127Vdc/Vac 220Vdc/Vac

Breakingcapacity(contact01) Resistivedcload 7A 4A 0.7A 0.3A

Resistivedcload 8A 8A

Resistivedcload 3.4A 2A 0.3A 0.15A

Resistivedcload 4A 4A

Power supply

Range Consumption when inactive Max. consumption Inrush current24/30Vdc 20% 2.5W 6W

8/2/2019 2008_ac0458en_LD

13/20

InstallationSepam 100 LDSepam 100 LD

Sepam 100 LD

Relay Cutout

DE4094

0

Weight:1.9kg

Stabilization plate

DE40939

Weight:1.7kg

AC0458EN.indd 11

8/2/2019 2008_ac0458en_LD

14/20

InstallationSepam 100 LDSepam 100 LD

Surge limiter

Single unit

DE4093

8

Weight:1.2kgmax.

Triple unit

DE40937

Weight:3.1kgmax.

AC0458EN.indd12

8/2/2019 2008_ac0458en_LD

15/20

Platebeforeinstallingtheplate,settherequiredresistanceusingtheohmmeter

wirethecurrenttransformerstotheterminalsthatcorrespondtotheircurrentrating,inparallelwithsurgelimiters:

between1-2and3-4for5A

between1-2and5-6for1A.

RelaysetmicroswitchSW1,locatedontheback,towithorwithoutlatching(seepage

3)

adjustthefrontdialtotherequiredsetting.

b

b

v

v

b

b

DE40936

Testing

Usingatemporaryconnection(1turn),injectacurrent20%abovethesetting(5Arating)intothetoroidprimaryandcheckthattherelaytrips.

Example:Is=40%In.

I=0.4x5Ax1.2=2.4A.

Thetestiscarriedoutoneachofthethreeplatesifathree-phaserelayisbeing

used.

CommissioningSepam 100 LDSepam 100 LD

AC0458EN.indd 13

8/2/2019 2008_ac0458en_LD

16/20

WhenorderingSepam100LD,stabilizationplate

and/orsurgelimiters,pleaseencloseaphotocopyof

this page with your order, lling in the requestedquantitiesinthespacesprovidedand

tickingofftheboxestoindicateyourchoices.

Sepam 100 S01 LD (suppliedwithconnectionsandmountinglugs)

Quantity

Ratedfrequency 50H z

60Hz

Version Single-phase

Three-phase

Auxiliarypowersupply 24to30Vdc

48to125Vdc

220to250Vdc

100to127Vac

220to240Vac

Stabilization plate

Resistance 68 - 280 W

150 - 280 W

270 - 280 W

470 - 180 W

680 - 180 W

Surge limiters

Singleunit

Tripleunit

Order formSepam 100 LDSepam 100 LD

AC0458EN.indd14

8/2/2019 2008_ac0458en_LD

17/20

NotesSepam 100 LDSepam 100 LD

AC0458EN.indd 15

8/2/2019 2008_ac0458en_LD

18/20

NotesSepam 100 LDSepam 100 LD

AC0458EN.indd16

8/2/2019 2008_ac0458en_LD

19/20

8/2/2019 2008_ac0458en_LD

20/20

ART.6

3979

SchneiderElectricIndus

triesSAS-Allrightsreserved

As standards, specications and designs change from time to time, please ask for conrmationof the information given in this publication.

Publishing: Schneider Electric Industries SASDesign: Schneider Electric / Polynotes

This document has been printedon ecological paper

Schneider Electric Industries SAS

89, boulevard Franklin RooseveltF-92505 Rueil-Malmaison CedexTel.: +33 (0)1 41 29 85 00

http://www.schneider-electric.com