Oil- and Vacuum-Break Switches - Cooper Industries

Oil- and Vacuum-Break Switches

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions S260-75-1

Service Information

October 2008 • Supersedes 10/02 �Printed in U.S.A.

Figure �. Type S automatic load-transfer control.

ContentsSafety Information .................................................................2

HazardStatementDefinitions...........................................2

SafetyInstructions.............................................................2

Product Information...............................................................3

Introduction.......................................................................3

AcceptanceandInitialInspection.....................................3

HandlingandStorage........................................................3

ANSIStandards.................................................................3

QualityStandards..............................................................3

DescriptionofOperation...................................................4

TimeDelaySelection.........................................................4

Pre-Installation Check...........................................................5

Pre-lnstallation...................................................................5

Installation Instructions.........................................................6

InitialProgramming............................................................6

MountingtheControl.........................................................6

GroundingtheControl.......................................................6

BeforePlacingtheControlandSwitchgear inService...........................................................................6

EquipmentRequired..........................................................6

CustomerConnections......................................................8

InterconnectingCables....................................................�3

Operating Instructions.........................................................�6

InitialOperation...............................................................�6

NormalOperation............................................................�7

Theory of Operation—Basic S Control...............................�7

VoltageSensing...............................................................�7

AutomaticTransfer,PreferredtoAlternate......................�8

ReturnTransfer,ParallelTransition..................................�8

ReturnTransfer,Non-ParallelTransition..........................�8

NoPreferenceMode........................................................�9

PreferredSourceIIMode................................................�9

ControlModeSwitch,S5................................................�9

ManualControl................................................................�9

IndicatingLamps.............................................................�9

RemovetheControlfromService...................................20

Troubleshooting—Basic S Control.....................................20

General............................................................................20

BasicTroubleshooting.....................................................20

AdvancedTroubleshooting..............................................2�

Fault Block Accessory.........................................................28

GeneralDescription.........................................................28

AccessorySettings..........................................................28

OperatingInstructions.....................................................29

TheoryofOperation—FaultBlockAccessory.................29

OvercurrentSensing........................................................29

PhaseFaultOperation.....................................................29

GroundFaultOperation...................................................32

ResetCircuits..................................................................32

InrushRestraintFeature..................................................32

TestingFaultBlockOperation.........................................33

ReturningtheControltoService.....................................35

Wiring Tables........................................................................36

Replacement Parts..............................................................40

FrontPanel—ReplacementPartsList.............................4�

BackPanel—ReplacementPartsList..............................42

FaultBlockAccessory—ReplacementPartsList............43

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

2

!SAFETYFOR LIFE SAFETY FOR LIFE

!SAFETYFOR LIFE

CooperPowerSystemsproductsmeetorexceedallapplicableindustrystandardsrelatingtoproductsafety.Weactivelypromotesafepractices in theuseandmaintenanceofourproducts throughourservice literature, instructional trainingprograms,andthecontinuouseffortsofallCooperPowerSystemsemployeesinvolvedinproductdesign,manufacture,marketing,andservice.

Westronglyurgethatyoualwaysfollowalllocallyapprovedsafetyproceduresandsafetyinstructionswhenworkingaroundhighvoltagelinesandequipmentandsupportour“SafetyForLife”mission.

This manual may contain four types of hazardstatements:

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in equipment damage only.

Hazard Statement DefinitionsWARNING: This equipment is not intended toprotect human life. Follow all locally approved

procedures and safety practices when installing oroperatingthisequipment.Failuretocomplycanresultindeath,severepersonalinjuryandequipmentdamage. G102.1

DANGER: Hazardous voltage. Contact withhazardous voltage will cause death or severe

personal injury. Follow all locally approved safetyprocedures when working around high- and low-voltagelinesandequipment. G103.3

WARNING: Beforeinstalling,operating,maintain-ing,or testingthisequipment,carefullyreadand

understand the contents of this manual. Improperoperation,handlingormaintenancecanresultindeath,severepersonalinjury,andequipmentdamage. G101.0

SAFETY INFORMATION

WARNING: Power distribution and transmis- sion equipment must be properly selected forthe intended application. It must be installed andserviced by competent personnel who have beentrained and understand proper safety procedures.Theseinstructionsarewrittenforsuchpersonnelandarenotasubstituteforadequatetrainingandexperi-ence insafetyprocedures.Failure toproperlyselect,install,ormaintainpowerdistributionandtransmissionequipmentcanresultindeath,severepersonalinjury,andequipmentdamage.G122.3

Safety InstructionsFollowingaregeneralcautionandwarningstatementsthatapplytothisequipment.Additionalstatements,relatedtospecifictasksandprocedures,arelocatedthroughoutthemanual.

The instructions in this manual are not intended as asubstitute for proper training or adequate experiencein the safe operation of the equipment described.Only competent technicians who are familiar with thisequipmentshouldinstall,operate,andserviceit.

A competent technician has these qualifications:

• Is thoroughly familiar with these instructions.

• Is trained in industry-accepted high- and low-voltage safe operating practices and procedures.

• Is trained and authorized to energize, de-energize, clear, and ground power distribution equipment.

• Is trained in the care and use of protective equipment such as flash clothing, safety glasses, face shield, hard hat, rubber gloves, hotstick, etc.

Following is important safety information. For safeinstallationandoperationof this equipment,besure toreadandunderstandallcautionsandwarnings.

3

S260-75-1!

SAFETYFOR LIFE

PRODUCT INFORMATION

Handling and StorageUse care during handling and storage of the control. Ifthecontrolistobestoredforanylengthoftimepriortoinstallation,provideaclean,drystorageareatominimizethepossibilityofmechanicaldamage.

ANSI StandardsKylereclosersaredesignedandtestedinaccordancewithANSIstandards C37.60 and C37.85 and ANSI guideline C37.61.

Quality StandardsISO9001:2000-CertifiedQualityManagementSystem

IntroductionService Information S260-75-1 provides installation,operation, and maintenance instructions for the Type Sautomaticload-transfercontrol.

Read This Manual FirstRead and understand the contents of this manual andfollowalllocallyapprovedproceduresandsafetypracticesbeforeinstallingoroperatingthisequipment.

Additional InformationTheseinstructionscannotcoveralldetailsorvariationsintheequipment,procedures,orprocessesdescribed,norprovidedirectionsformeetingeverypossiblecontingencyduring installation, operation, or maintenance. Foradditional information, contact your Cooper PowerSystemsrepresentative

Acceptance and Initial InspectionEachTypeScontroliscompletelyassembled,tested,andinspectedatthefactory.Itiscarefullycalibrated,adjusted,and in good condition when accepted by the carrier forshipment.

Upon receipt, inspect the carton for signs of damage.Unpack thecontrol and inspect it thoroughly fordamageincurred during shipment. If damage is discovered, file aclaimwiththecarrierimmediately.


4

Description of OperationTheTypeScontrolisdesignedforuseprimarilywithKyleTypeVR,VLR,VRV,TSC,andCthree-phase,load-breakswitchesinautomaticload-transferschemes.Inatypicalscheme, service to a critical load is normally suppliedfromapreferredsource.Itisautomaticallyswitchedtoanalternate,standbysourceifthepreferredsourcevoltageis lost forany reason forapresetperiodof time.Uponrestoration of the preferred source voltage, the load isautomatically switched back to the preferred source,againafterapredeterminedtimedelay.

Typical Automatic Load-transfer Sequence using the Type S Control

•Theloadistransferredtothealternatesourceafterapresettimedelay,whenthepreferredsourcevoltageislostandnormalvoltageispresentonthealternatesource.EitherSourceIorSourceIIcanbeselectedasthepreferredsourcebyasettingontheSOURCEPREFERENCESwitch,S4.

•Theloadistransferredbacktothepreferredsource—after another preset time delay—when normalvoltageisrestoredtothepreferredsource.Thereturntransfer (from Source II to Source I) can be eithernon-parallel (alternate-source switch opens beforepreferred-sourceswitchcloses)orparallel(preferred-sourceswitchclosesbeforealternate-sourceswitchopens). With parallel return the second interruptionis eliminated; however, both sources must be insynchronism.ThereturntransfermodeisselectedbyasettingontheSOURCEPREFERENCEswitch,S4.

Variations in the Operation of the Type S Control

•No-Preference Operation. When either sourceis acceptable for continuous critical load supply.Upon loss of Source I voltage—and after a presettime delay—the load is automatically transferredto Source II, provided normal voltage is present onSource II.However, the load isnot transferredbacktoSourceIwhenvoltageisrestored,butremainsonSourceIIuntilsuchtimeasSourceIIvoltageislost.Then an automatic nonparallel transfer to Source Iis performed. (Accomplished by setting SOURCEPREFERENCE switch, S4, to NO PREF position.)

•Hold on Alternate Source. When placed to theHOLD ON ALTERNATE position, the S control willnot automatically return to the preferred feeder. Ifthepreferred feeder is energized, theScontrol canbe manually transferred to the preferred feeder bymomentarily moving S3 to the NORMAL position.

IMPORTANT: IfControlModeSwitchS3isplacedinthe“AUTO”position,theS-controlwillplacethehigh-voltagetransferswitchesintotheconfigurationthatiscurrently selected by the Source Preference SwitchS4. This may result in an unintended transfer. Makesure the desired state of the high-voltage transferswitchesmatchthesettingofS4beforereturningS3tothe“AUTO”position.

• Manual Operation of the S control.TheSourceIandSourceIIhigh-voltageswitchescanbeopenedandclosedindependentlytoeffectmanualtransferfrom one source to the other. (Accomplished bysetting OPERATION SELECTOR switch, S3, toMANUALandoperatingMANUALOPER.SOURCEI(S1)andMANUALOPER.SOURCEII(S2)switchesasrequired.)

Inaddition,a factory-installedfaultblockaccessorywillBlockTransferiflossofvoltageisduetoafaultontheloadsideofthehigh-voltageswitches.Whenpreferredsourcevoltageislost(duetotheopeningofthebackupprotectivedevice)—and after the preset time delay—the preferredsourceswitchwillopenandthefaultblockaccessorywilldisabletheScontroltopreventclosingeitherhigh-voltageswitchintothefault.TheScontrolmustbemanuallyresetbeforeservicetotheloadcanberestored.Thefaultblockoption is a factory-installed accessory. The accessory isactivatedbyover-currentsignalssuppliedbyload-sensingcurrent transformers built into special factory-modifiedTypeVR,VLR,VRV,TSC,andCShigh-voltageswitches.ItisalsocompatiblewiththePST-6switchgear.ThePST-9switchgeardoesnotrequirefaultblock.

Time Delay SelectionThe time delay setting for preferred to alternate sourcetransfer must be long enough to allow discriminationbetweenpermanent lossofvoltageand temporary lossofvoltagedue to transienteffectsor reclosing intervalsof backup protective reclosers or breakers. The time-delay required to override reclosing intervals is difficulttodeterminesincevoltagemaybesubnormalduringtheretardedtimingoperationsof thebackupdevicedue tothepresenceofthefault.Itisrecommendedthatthetimedelaybeforetransferfrompreferredtoalternatesourceissettoexceedthemaximumcumulativetimetolockoutofthebackupprotectivedevice.Thisapproachassuresthatthetransferswitchwillnotinterruptthecurrentofafaultoccurringontheloadsideoftheswitch.

Thetimedelayforreturnfromalternatetopreferredsourceupon restoration of preferred source voltage should besetforanintervallongenoughtoassurethatserviceonthepreferredsourcehasbeenpermanentlyrestored.

Whenthecontrol isprogrammedtooperate in the“no-preference” mode, there are no preferred or alternatesources.Timedelay intervals for transfer fromSource ItoSource II aregovernedby the left-handPreferred toAlternatetimerandfortransferfromSourceIItoSourceIbytheright-handAlternatetoPreferredTimer.Settingsofthetwotimersmaybedifferentbecauseofdifferenceinbackupprotectiononthetwosources.

5

S260-75-1!

SAFETYFOR LIFE

PRE-INSTALLATION CHECK

WARNING: Hazardousvoltage. Neverrelyonthe open position of the operating handle or the

contactpositionindicator;itdoesnotensurethatthelineisdenergized.Followalllocallyapprovedsafetypractices.Failuretocomplycanresultincontactwithhighvoltage,whichwillcausedeathorseverepersonalinjury. G123.1

WARNING: This equipment is not intended toprotect human life. Follow all locally approved

procedures and safety practices when installing oroperatingthisequipment.Failuretocomplycanresultindeath,severepersonalinjuryandequipmentdamage. G102.1

Pre-Installation

TheTypeSautomaticload-transfercontrolisprogrammedto customer’s specifications and thoroughly testedbeforeshipment fromthe factory.Performthe followingpre-installation test setup and procedure to verify theoperationofthestandardScontrol.Note:Thisproceduredoesnottestcompletecontroloperation.

Thiscanbedoneonlyonacomplete installationbasiswith the S control operating the high-voltage transferswitches.

Test Set–up�. Connecta120Vac,60Hzpowersupplytoterminals

Z and G2 of TB2 being absolutely certain that thegroundedsideofthepowersupplyisconnectedtoG2.

2.JumperterminalZtoYtoXtoCtoBtoA.

3.Whenthe120Vacpowersupplyisturnedon,allsixphasesareenergized.

4.To simulate loss of voltage on any phase of eithersource,simplyunscrewtheappropriatefuse“FU”inthecontrol.

Test Procedure�.ChecktheindicatinglampsbydepressingtheLAMP

TESTswitch(S6).Alllampsonthefrontpanelofthecontrol (including fault block accessory if installed)shouldlightwithequalbrilliance.

2.WithphaseYand/orphaseBenergized,terminals11and21ofTB1willalwaysshow120Vactoground(G1orG2).

3.With OPERATIONS SELECTOR switch (S3) set toMANUAL, terminal 13 of TB1 will respond to theoperation of MANUAL OPER. SOURCE I switch(S1) showing120Vac togroundwhenS1 is in theopenpositionand10Vac,orless,whenS1isintheOFFandCLOSEpositions.Terminal23ofTB1willshowsimilarvoltages toground in response to theoperationofMANUALOPER.

4.When MANUAL OPER. SOURCE I switch (S1)

is in the CLOSE position there should be 120 Vacbetweenterminal15ofTB1andground.Similarly,whenMANUALOPER.SOURCEIIswitch(S2)isintheCLOSEpositionthereshouldbe120Vacbetweenterminal25ofTB1andground.

5.To check the response of the latching relay toautomaticoperation,proceedasfollows:

A.SetOPERATIONSELECTORswitch(S3)toAUTO.

B.Select the desired source preference and returnmodewithswitchS4.

C.Afterwaitingforatimeinexcessofthemaximumtransfer delay timer setting (to make sure thecontrol is at rest), simulate a “lost” phase byunscrewing one of the preferred source fuses.Listen for relayclatter to recognizebreaking thecircuit.

D.Assoonasphasevoltageislost,thePREFERREDTOALTERNATETIMERwillstarttorun.VerifytheLEDtimerisilluminatedduringoperation.

E.When timing is complete, the latching relay (R1)will operate. Its position can be checked by thepresenceof120Vacat test terminalsT-1orT-2on the front panel. 120 Vac between T-2 and T-3 (ground) means the latching relay has movedtothatpositionwhichwouldconnecttheloadtoSource II if HV switches were connected to thecontrol.120VacatT-1meanstheloadwouldbeconnectedtoSourceI.

F.Replace the removed fuse to restore preferredsource power, observe operation of the ALTER-NATE TO PREFERRED TIMER, and check thestatus of the latching relay (R1) when timing iscompleted.

Note:SOURCEPREFERENCEswitchS4cannotbeinNOPREFpositionforthistest.

G.Other modes of transfer can be checked byprogrammingthecontrolforthedesiredsequence,simulating loss of source voltage, observingresultantcontroloperation,andcheckingthefinalpositionofthelatchingrelay(R1).

6.Timer settings can be verified with a watch whileperformingthechecksinprecedingStep5.

7.SwitchIandSwitchIIpositionindicatinglampswillnot operate during this preinstallation check sincethehigh-voltagetransferswitchesarenotconnectedtothecontrol.

Their operation can be verified by connecting a100ohm,1watt,resistorfromTB1terminalsto groundasfollows:

SWITCHIOPENlamp—terminal15toground SWITCHICLOSEDlamp—terminal24toground SWITCHIIOPENlamp—terminal25toground SWITCHIICLOSEDlamp—terminal14toground


6

INSTALLATION INSTRUCTIONSA typical automatic transfer scheme is illustratedinFigure2.

Initial ProgrammingThe control must be programmed with all necessaryoperating settings prior to operation with energizedswitchgear.ForthedesiredsettingsrefertotheOperating Instructionssectioninthismanual.

Mounting the ControlMounttheScontrolinaconvenient,accessiblelocation.Maximum distances between the high-voltage transferswitches and potential sensing transformers and thecontroldependsuponthesizeofthecontrolcablewireand the length of various cable combinations. (See theInterconnecting Cablessectioninthismanual.)Keepinmind that the longer the cable lengths, the greater thesusceptibility to surge damage. Therefore, for optimumreliability and economy, locate the switches andtransformersasnearaspossibletothecontrol.

MountingdimensionsareprovidedinFigure3.

•Forpole-mounted installation,aholeandkeyway inthecontrolmountingbracketaccommodatesa5/8”bolt.

•For substation installation, the control is factoryinstalled.Levelingisnotrequired.

Grounding the Control

The control cabinet must be grounded. A groundingconnector on the underside of the cabinet willaccommodate No. 14 solid through No. 4 strandedconductors.

For effective surge protection all control and powerconductorsfortheScontrolmustberoutedparalleltoacorrespondinggroundpath.Forexample,theACpowersupplyforthecontrolshouldbeparalleltoandequal inlengthtothetransformergroundpath.Thecontrolcableshouldbeparalleltoandroutedclosetotheswitchgeargroundpath.

WARNING: Hazardousvoltage.Solidlygroundallequipment. Failure to comply can result in death,

severepersonalinjury,andequipmentdamage. T223.2

Before Placing the Control and Switchgear into Service

Prior toplacingthecontrolandswitchgear intoservice,the following installation procedures must be properlycompletedandverified:

�.Controlproperlymountedfortheinstallation.

2.Equipmentinstalledaccordingtoalllocallyapprovedstandardsandpractices.

3.Control and switchgear properly grounded inaccordancewithguidelinesinthismanual.

4.ACpowerconnectedtothecontrol.

5.All control programming entered and verified byappropriatepersonnel.

Equipment RequiredThe following equipment is required for a load-transferinstallation:

Type S Load-Transfer ControlThe control, with or without the fault block accessory,is housed in a cabinet whose outline and mountingdimensionsareshowninFigure3.Thecontrolcabinetcanbemountedonapoleorsubstationstructure.Levelingisnotrequired.Boththecabinetdoorandthehingedfrontpanel are equipped with hold-open latches to preventthemfromswingingintheopenposition.

Motor Operated SwitchesThe three-phase, load break switches require a specialwiring accessory for operation with the Type S control.Inaddition, if faultblock isprovided,theswitchesmustbeequippedwith1000:1ratiocurrenttransformersalsoavailable as a factory-installed switch accessory. Seethe switch installation manual for overall and mountingdimensionsandforwiringdiagrams.

Potential TransformersThree-phase voltage sensing is required for controloperation. Transformer connections and voltages forvarious distribution system connections are shown inFigure5.ThevoltagesensingrelaysoftheTypeScontroldropoutonadecreasing voltageat 75 volts (min) andpickuponan increasingvoltageat97volts (max).Thecontrolrequires120Vac,60Hz,500VA(min)tooperatethetransformerswitches.Quiescentpowerdissipationat120Vacis18watts.

CAUTION: Equipment misoperation. Do notenergize this equipment until all control settings

havebeenproperlyprogrammedandverified.RefertotheControlProgrammingandOperationsectionofthismanualforprogrammingprocedures.Failuretocomplycan result in misoperation (unintended operation),equipmentdamage,andpersonalinjury. G118.1

7

S260-75-1!

SAFETYFOR LIFE

11"

13 1/2"1 3/16"

22 5/32"

12 13/16" 8"16"

5/8" HOLE PROVIDEDFOR CUSTOMER LOCK

MTG HOLES (2) FOR5/8" MAX BOLT DIA

1 1/2"

20 1/8"MTG DIM

17 7/8"

GROUNDINGTERMINAL LUG(14 TO 4 STRANDED)

1 5/8" DIA HOLES2 1/2" 2 1/2" 2 1/2" 2 1/2"

5 1/4"

1 1/

2"1

1/2"

STD CONTROL

CONTROL WITH FAULT BLOCK

SOURCE I SOURCE II

LOAD

POTENTIALSENSINGTRANSFORMERS

POTENTIALSENSINGTRANSFORMERS

H.V.SWITCH II

H.V.SWITCH I

TYPE S CONTROL

Figure 2. Typical Type S control load-transfer scheme.

Figure 3. Outline and mounting dimensions.

TABLE 1Reaction and Transition Times of Cooper Power Systems Motor-Operated Switches

Direction of Transfer First Switch Transition (Source to Switch Reaction Time* Time** Source) Type of TransitionVR,VLR,VRV(standard) 2.5to3.5cycles 10sec(approx) ItoII NoparallelingofsourcesVR,VLR,VRV(standard) 2.5to3.5cycles 10sec(approx) IItoI NoparallelingofsourcesVR,VLR,VRV(standard) 10sec(approx) 1.0to1.5cycles IItoI Parallelingofsourcesonreturnto preferredsourceVR,VLR,VRV(quickclose) 2.5to3.5cycles 6to7cycles ItoII NoparallelingofsourcesVR,VLR,VRV(quickclose) 2.5to3.5cycles 6to7cycles IItoI NoparallelingofsourcesVR,VLR,VRV(quickclose) 4.0to5.5cycles 1.0to1.5cycles IItoI Parallelingofsourcesonreturnto preferredsourceTSC 7to8sec 7to8sec ItoII NoparallelingofsourcesTSC 7to8sec 7to8sec IItoI NoparallelingofsourcesTSC 7to8sec 7to8sec IItoI Parallelingofsourcesonreturnto preferredsourcePST-6,PST-9 2.0to3.0cycles 5.0to6.0cycles ItoII NoparallelingofsourcesPST-6,PST-9 2.0to3.0cycles 5.0to6.0cycles IItoI NoparallelingofsourcesPST-6,PST-9 5.0to6.0cycles 2.0to3.0cycles IItoI Parallelingofsourcesonreturnto preferredsource

*Timefromexpirationoftimedelaytofirstopening(orclosing)ofhigh-voltageswitch.AddapproximatelyonecycletothevaluesshowntoallowforTypeScontrolrelayoperatingtime.

**Time-loadtapisdisconnectedorparalleleddependingontypeoftransitionused.


8

* Assuming no feedback from the load** Bank operates open wye-delta; requires two primary phases open for sensing† Voltage may vary from 87 to 58% depending on load

LOAD

H.V.SWITCH

H.V.SWITCH

S CONT

B

C DA

FEEDERSOURCE

%

Phase Voltage at the Three-Phase Sensing Type S Load Transfer Control as Related to System and Sensing Transformer Connections

Figure 4. Phase voltage at the three-phase sensing Type S load-transfer control.

Customer ConnectionsConnection Diagram

Diagrams for interconnecting the load-transfer controlwiththehigh-voltageswitchesandpotentialtransformersare shown in Figures 5 through 8. The diagrams show

CAUTION: Equipmentdamage.Donotdrillconnectionholesintothetopofthecabinet.Connectionholesinthetopofthecabinetwillallowmoisturetoseepintothecontrolanddamagethecomponentsorcausecontrolmisoperation.Failure tocomplywillvoid thecontrol’sfactorywarranty. T249.0

the internalwiringbetween the terminalblocksand theinput and output receptacles on the control (availableas an accessory) and the external wiring between thecontrol, transferswitches,andpotential transformers. Ifthecontrolisnotequippedwiththeplugsandreceptaclesaccessory, the cables are wired directly to the terminalblocksinthecontrol.Forthephysicallocationofterminalblocks,refertoFigure27.

Note:Internally wired receptacles and mating plugs for theswitchoperatorsandcurrentsensingtransformersontheswitchendof thecablesareprovidedasstandardwiththeswitches.

9

S260-75-1!

SAFETYFOR LIFE

Figure 5.Connection diagram for Type S load-transfer control (with fault block accessory) operating a Type VR, VLR, or VRV three-phase switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

A B C D E F

A B C D E F

AB

CG

1G2

XY

Z

1115

1413

1626

2324

2521

G1G

2

1718

IAIB

ICIX

IYIZ

2728

ININ

REC

EPTA

CLE

S AN

D P

LUG

S F

UR

NIS

HED

WIT

H K

A217

VR

W

IRIN

G A

CC

ESSO

RY

S

CO

NTR

OL

TRAN

SFER

SW

ITC

H O

PER

ATO

RS

POTE

NTI

AL S

ENSI

NG

TR

ANSF

OR

MER

S

FAU

LT B

LOC

K AC

CES

SORY

LOAD

TAP

TYPE

VR

, VLR

, OR

VRV

SWIT

CH

WIT

H K

A217

VRW

IRIN

G A

CC

ESSO

RY

SOU

RC

E IN A B C

SEE

INSE

RT F

OR

INTE

RN

AL

CO

NN

ECTI

ON

S

"CT"

"SW

"

TRIP

OPE

NC

OIL

QU

ICK

CLO

SEC

OIL

NO

TE: F

OR

SIN

GLE

-PH

ASE

SEN

SIN

GJU

MPE

R T

ERM

INAL

A T

O B

TO

C A

ND

TER

MIN

AL X

TO

Y T

O Z

ON

TB2

SELE

CTO

R S

WIT

CH

MO

TOR

INTE

RN

AL C

ON

NEC

TIO

N D

IAG

RAM

:Q

UIC

K C

LOSE

SW

ITC

H O

PER

ATO

R

AB

CD

EF

AB

CD

EF

AB

CD

EF

23

4G

01

GR

NR

ED BLK

WH

T

G GH H

AB

CD

EF

AB

CD

EF

AUX.

SW

"a"

CO

NTA

CT

(STA

GE1

)

A B C D E F

A B C D E F

A B C D EG

A B C D EGH J K

H J K

GR

NR

ED BLK

WH

T

GR

NR

ED BLK

WH

TYEL

OR

GBL

U

GR

NW

HT

RED BL

KO

RG

BLU

GR

NW

HT

RED BL

KO

RG

BLU

"CT"

"SW

"A B C D E F

A B C D E F

A B C D E F

A B C D E FG

GH J K

H J K

GR

NR

ED BLK W

HT

YEL

OR

GBL

U

A B C D E

A B C D E

"PT"

"PT"

AB

CD

EF

AB

CD

EF

G GH H

AB

CD

EF

AB

CD

EF

FAC

TORY

-WIR

ED R

ECEP

TAC

LEAN

D P

LUG

AC

CES

SORY

KC

N55

SB(IF

AC

CES

SORY

IS N

OT

SPEC

IFIE

DW

IRE

SWIT

CH

CO

NTR

OL

DIR

ECTL

YTO

TB1

, PT'

S TO

TB2

AN

D C

T'S

TO T

B5.)

SOU

RC

E I A

ND

SO

UR

CE

II M

UST

PRES

ENT

THE

SAM

E PH

ASE

RO

TATI

ON

TO

TH

E LO

AD.

TYPE

VR

, VLR

, OR

VRV

SWIT

CH

WIT

H K

A217

VRW

IRIN

G A

CC

ESSO

RY

SOU

RC

E II

N X Y Z

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

SEE

INSE

RTFO

R IN

TER

NAL

CO

NN

ECTI

ON

S

TRIP

OPE

N C

OIL

SELE

CTO

R S

WIT

CH

MO

TOR

INTE

RN

AL C

ON

NEC

TIO

N D

IAG

RAM

: S

TAN

DAR

D S

WIT

CH

OPE

RAT

OR

AB

CD

EF

23

4G

01

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

AU

X.

SW

"a"

CO

NTA

CT

(STA

GE1

)2

12

1


�0

Figure 6.Connection diagram for Type S load-transfer control (with fault block accessory) operating the Type TSC three-phase switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

SOU

RC

E I A

ND

SO

UR

CE

II M

UST

PRES

ENT

THE

SAM

E PH

ASE

RO

TATI

ON

TO

TH

E LO

AD.

T

YPE

TSC

SW

ITC

HW

ITH

KA5

TSC

1 C

T AC

CES

SORY

LOAD

TAP

SOU

RC

E I

N A B C

SOU

RC

E II

N X Y Z

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

REC

EPTA

CLE

AN

D P

LUG

FUR

NIS

HED

WIT

H K

A5TS

C1

W

IRIN

G A

CC

ESSO

RY

S

CO

NTR

OL

TRAN

SFER

SW

ITC

H O

PER

ATO

RS

TB1

TB2

POTE

NTI

AL S

ENSI

NG

TR

ANSF

OR

MER

S

"PT"

"PT"

"SW

""S

W"

NO

TE: F

OR

SIN

GLE

-PH

ASE

SEN

SIN

GJU

MPE

R T

ERM

INAL

A T

O B

TO

C A

ND

TER

MIN

AL X

TO

Y T

O Z

ON

TB2

FAC

TORY

-WIR

ED R

ECEP

TAC

LEAN

D P

LUG

AC

CES

SORY

KC

N55

SB(IF

AC

CES

SORY

IS N

OT

SPEC

IFIE

D,

WIR

E SW

ITC

H C

ON

TRO

LS D

IREC

TLY

TO T

B1, P

T'S

TO T

B2, A

ND

CT'

S TO

TB5

.)

AB

CD

EF

AB

CD

EF

AB

CD

EF

AB

CD

EF

A B C D E F

A B C D E F

A B C D E F

A B C D E F

A B C D E

A B C D E

A B C D E

A B C D E

AB

CG

1G

2X

YZ

1115

1413

1626

2324

2521

G1 G

2

GR

NR

EDBL

KBL

KW

HT

WH

T

GR

NR

ED

GR

NW

HT

RED BL

K

BLU

OR

G

GR

NW

HT

RED BL

K

BLU

OR

G

M

CLOSE

OPENa1b1

TYPE

TSC

SW

ITC

HW

ITH

KA5

TSC

1 C

T AC

CES

SORY

AB

CD

EF

AB

CD

EF

GH

GH

a1a2

AB

CD

EF

AB

CD

EF

GH

GH

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

"CT" A B C D E F

A B C D E FG H J K

G H J K

GR

NR

ED BLK

YEL

BLU

OR

G

WH

TW

HT

GR

NR

ED BLK

YEL

BLU

OR

G

A B C D E F

A B C D E FG H J K

G H J K

1718

IAIB

ICIX

IYIZ

2728

ININ

FAU

LT B

LOC

K AC

CES

SORY

M

CLOSEOPEN

a1b1

M

CLOSEOPEN

a1b1

��

S260-75-1!

SAFETYFOR LIFE

Figure 7.Connection diagram for Type S load-transfer control operating the Type PST-6 switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

2019

1817

1615

1413

1211

109

87

65

43

21

ZY

XG

2G

1C

BA

2019

1817

1615

1413

1211

109

87

65

43

21

2221

AA

B C D E F G H J K

B C D E F G H J K

LL

M N P R S T U V

M N P R S T U V

AA

B C D

B C D

EE

F G H

F G H

GF

ED

CB

AG

FE

DC

BA

GF

ED

CB

AG

FE

DC

BA

KJ

HK

JH

TS

RP

NM

LT

SR

PN

ML

VU

VU

TB2

TB6

TB5

"PT"

"PT"

"SW

""S

W"

S

CO

NTR

OL

TRAN

SFER

SW

ITC

H O

PER

ATO

RS

POTE

NTI

AL S

ENSI

NG

TR

ANSF

OR

MER

S

LOAD

TAP

TYPE

CI S

WIT

CH

SOU

RC

E I

SEE

INSE

RT F

OR

INTE

RN

AL

CO

NN

ECTI

ON

S

NO

TE: F

OR

SIN

GLE

-PH

ASE

SEN

SIN

GJU

MPE

R T

ERM

INAL

A T

O B

TO

C A

ND

TER

MIN

AL X

TO

Y T

O Z

ON

TB2

INTE

RN

AL C

ON

NEC

TIO

N D

IAG

RAM

:C

-INTE

RR

UPT

ER #

1

SOU

RC

E I A

ND

SO

UR

CE

II M

UST

PRES

ENT

THE

SAM

E PH

ASE

RO

TATI

ON

TO

TH

E LO

AD.

SOU

RC

E II

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

SEE

INSE

RTFO

R IN

TER

NAL

CO

NN

ECTI

ON

S

INTE

RN

AL C

ON

NEC

TIO

N D

IAG

RAM

: C

-INTE

RR

UPT

ER #

2

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

LS3

(NC

)

87

65

43

21

910

TS

RP

NM

LV

U

TRIP

CO

ILR

MC

LOSE

CO

IL

LS2

(NO

)

LS2

(NC

)

LS3

(NO

)LS

1(N

C)

LS4

(NC

)

LS4

(NO

)

KEY:

NC

= N

OR

MAL

LY

CLO

SED

NO

= N

OR

MAL

LY

O

PEN

M =

MO

TOR

R =

RES

ISTO

R

TYPE

CI S

WIT

CH

LS3

(NC

)

87

65

43

21

910

TRIP

CO

ILR

MC

LOSE

CO

IL

LS2

(NO

)

LS2

(NC

)

LS3

(NO

)LS

1(N

C)

LS4

(NC

)

LS4

(NO

)

GF

ED

CB

AJ

HK

N A B C

N X Y Z


�2

Figure 8.Connection diagram for Type S load-transfer control operating the Type PST-9 switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

FE

DC

BA

FE

DC

BA

LOAD

TAP

TYPE

CI S

WIT

CH

SOU

RC

E I

SEE

INSE

RT F

OR

INTE

RN

AL

CO

NN

ECTI

ON

S

NO

TE: F

OR

SIN

GLE

-PH

ASE

SEN

SIN

GJU

MPE

R T

ERM

INAL

A T

O B

TO

C A

ND

TER

MIN

AL X

TO

Y T

O Z

ON

TB2

INTE

RN

AL C

ON

NEC

TIO

N D

IAG

RAM

:C

-INTE

RR

UPT

ER #

1

SOU

RC

E I A

ND

SO

UR

CE

II M

UST

PRES

ENT

THE

SAM

E PH

ASE

RO

TATI

ON

TO

TH

E LO

AD. SO

UR

CE

II

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

INTE

RN

AL C

ON

NEC

TIO

N D

IAG

RAM

: C

-INTE

RR

UPT

ER #

2

POTE

NTI

ALSE

NSI

NG

TRAN

SFO

RM

ERS

500

VA M

IN12

0 VA

C, 6

0 H

ZSE

CO

ND

ARIE

S

LS3

(NC

)

87

65

43

21

910

FE

DC

BA

TRIP

CO

ILR

MC

LOSE

CO

IL

LS2

(NO

)

LS2

(NC

)

LS3

(NO

)LS

1(N

C)

LS4

(NC

)

LS4

(NO

)

KEY:

NC

= N

OR

MAL

LY

CLO

SED

NO

= N

OR

MAL

LY

O

PEN

M =

MO

TOR

R =

RES

ISTO

R

TYPE

CI S

WIT

CH

ML

KJ

HG

ML

KJ

HGSE

E IN

SERT

FOR

INTE

RN

ALC

ON

NEC

TIO

NS

LS3

(NC

)

87

65

43

21

910

TRIP

CO

ILR

MC

LOSE

CO

IL

LS2

(NO

)

LS2

(NC

)

LS3

(NO

)LS

1(N

C)

LS4

(NC

)

LS4

(NO

)

LK

JH

GM

N A B C

N X Y Z

AA

B C D

B C D

EE

F G H

F G H

"PT"

"PT"

AA

B C D E F

B C D E F

"SW

"G

GH J K L M

H J K L M"SW

"

ZY

XG

2G

1C

BA

TB2

POTE

NTI

AL S

ENSI

NG

TR

ANSF

OR

MER

S

2125

2423

2616

1314

1511

TB1

S

CO

NTR

OL

TRAN

SFER

SW

ITC

H O

PER

ATO

RS

G1G

2

TO TPG

1TO TP

G1

TO TPG

1TO TP

G2

TO TPG

2TO TP

G2

�3

S260-75-1!

SAFETYFOR LIFE

Figure 9. Plugs and receptacles accessory. 020079KM

Interconnecting CablesInterconnecting cable conductor size is dependentupon the distance between the control, switches, andpotentialtransformers.MaximumlengthsofvariouscablecombinationsforNo.18throughNo.12AWGconductorsare shown in Table 2. The longest combination forthe particular installation will determine the minimumconductorsize.Allcablesaretobethesameconductorsize.Note:Ifthecontrolisequippedwiththefaultblockaccessory,

see Table 3 for additional cable length limitations.

On the switch end, the cables are wired to connectorplugsprovidedasstandardwiththeswitches.OntheScontrolend,thecablesarewiredeitherdirectlytoterminalblocksinthecontrolortoconnectorplugsprovidedwiththe Plugs and Receptacles accessory. Figure 9 showsthe location of the accessory plugs and receptacles inthe bottom of the control cabinet. See the appropriateswitch installation manual for the location of the plugsandreceptaclesontheswitch.

Switch CableAconductorcableisrequiredbetweentheScontrolandeach high-voltage switch to operate the switches. ThiscableiswiredtoasocketplugattheswitchendandtoeitheraplugorTB1atthecontrolend.Pinidentification,andcableODandmaximumconductorsizeaccommo-datedbytheplugsareshowninFigures10and11.

Potential Transformer CableAfour-conductorcableisrequiredbetweentheScontrolandthepotentialtransformerstotransmitsourcevoltageintelligenceandtosupplyoperatingpowerforthecontrol.This cable is wired to a five-pin socket plug or TB2 atthecontrolend.Pinsocketidentification,cableOD,andmaximum conductor size accommodated by the plugsareshowninFigure12.Note:Connectorsarenotsupplied for the transformerendof

thecable.

TABLE 2Maximum Control Cable Lengths

LOAD

S CONTROL

HVSW 2

DC

HVSW 1

BA

Maximum Length ofCable Wire Control Cable Combinations (ft.) Size VR, VLR, or VRV Switches TSC Switch (AWG) A+B+D or C+B+D A+B or A+D or C+B or C+D

18 1450 1250 16 2300 2000 14 3700 3200 12 5900 5050

Note: ThecontrolcablelengthsarenotapplicablefortheCswitchandthePSTswitch.

Figure �0. Switch cable plug for VR, VLR, VRV, and TSC.

Figure ��. Switch cable plugs for PST-6 and PST-9.

Figure �2.PT cable plug.

KEYWAYPINF

VIEWA-A

MAX.WIRESIZE–NO.16AWG

PININSERTCONNECTIONSINTOCONTROL

RUBBERGROMMETACCOMMODATES1/2"TO5/8"DIA.CABLE

A

A

KEYWAYPINF

VIEWA-A

PININSERTCONNECTIONSINTOCONTROL

A

A

PST-68,7,&19PINRECEPTACLES

PST-98&19PINRECEPTACLES

A FEG

DCB

A GF

EH

DCB

8PIN7PIN19PIN

L M AK U N B

CD

PVTJRS

EFH

G

KEYWAY

SOCKETE

MAX.WIRESIZE–NO.12AWG

SOCKETINSERT–CONNECTSINTOCONTROL

RUBBERGROMMETACCOMMODATES3/8"TO1/2"DIA.CABLE

A

A


�4

Figure �3. Fault block cable plug.

Fault Block Shielded CableTable3showsthemaximumdistancebetweenthecontroland thehigh-voltageswitches fora rangeofconductorsizes and fault-block settings. The table is based onconductor voltage drop and saturation of the currentsensingtransformersintheswitch.Loweractuatinglevelsand lowermultiplierscouldallow longer lines.However,the limitation on switch control cable lengths, Table 2,precludetheiruse.

ShieldedcableisrequiredbetweenthetransferswitchesandtheScontrolforoperatingthefaultblockaccessory.

Theshieldmustbegroundedtotheequipmenthousingatboththeswitchandcontrolends.ShieldconnectionsaremadeatconnectorplugpinorsocketasshowninFigure13.ThispinmateswiththereceptaclepinorsocketwhichisgroundedintheswitchandinthecontrolasshowninFigures6and8.

IMPORTANT: Only shielded cable is to be used onfault block accessory and is mandatory to validatetheCooperPowerSystemswarranty.Useofanon-shieldedcablecouldresultinmisoperation.

KEYWAY

SOCKETA

SWITCHEND

STRIPJACKETTOEXPOSESHIELDING

RUBBERGROMMETACCOMMODATES.50TO.56DIA.CABLE

A

A

KEYWAY

CONTROLEND

PING

SOLDER#16AWGJUMPERWIREFROMSHIELDTOPINGTOCOMPLETESHIELDCONNECTION

TABLE 3Fault Block Cable Limitations

Max. Distance in Feet Phase Between Switch and Actuating Con- S Control Current ductor Level Size For X 8 For X 6 For X 4 (Amps) (AWG) Multi- Multi- Multi- plier plier plier

640 18 600 1000 1800 640 16 950 1600 2900 640 14 1500 2550 4600 640 12 2400 4000 7300 448 18 1100 1700 – 448 16 1800 2700 – 448 14 2800 4300 – 448 12 4500 6850 – 320 18 1800 – – 320 16 2900 – – 320 14 4600 – – 320 12 7300 – –

�5

S260-75-1!

SAFETYFOR LIFE

Figure �4. Type S control front panel. 020076KM

Index No.Figure 2 Description Purpose and Use

1 SOURCEPREFERENCEANDRETURNMODE SelectseitherSourceI(PREFI)orSourceII(PREFII)asthepreferred Switch(S4)(SeeNoteA) source,ornopreference(NOPREF).Alsoselectedparallel(P)or non-parallel(NP)returnmode. 2 SOURCEIENERGIZEDlamp IndicatesallthreephasesofSourceIareenergized. 3 OPERATIONSELECTORSwitch(S3) ProgramscontrolforeitherAUTOmaticorMANUALoperation. 4 PREFERREDTOALTERNATETIMER Determinestimedelaybeforetransfertoalternatesourcewhenpreferred sourcevoltageislost. 5 SWITCHIOPENandCLOSEDlamps IndicatesstatusofSourceIhighvoltageswitch. 6 LAMPTESTswitch(S6) Testsallindicatinglampsonfrontpanel. 7 LATCHRELAYSTATUSTESTterminals Provideselectricalaccesstobothsidesoflatchrelayto (T1—T2—T3) determineifcontrolisinSourceIorSourceIImode. 8 SWITCHIIOPENandCLOSEDlamps IndicatesstatusofSourceIIhighvoltageswitch. 9 ALTERNATETOPREFERREDTIMER Determinesthetimedelaybeforetransfertopreferredsourcewhenpreferred sourcevoltageisrestored. 10 MANUALOPER.SOURCEIandMANUALOPER. ProvidesmeanstoOPENandCLOSESourceIandSourceII SOURCEIIswitches(S1andS2) transferswitchuponmanualcommand,whenS3isinMANUALposition. 11 SOURCEIIENERGIZEDlamp IndicatesallthreephasesofSourceIIareenergized. 12 CONTROLMODEswitch(S5) Blocksautomaticreturntransfertopreferredsources(HOLDON ALTERNATE);alsoenablescontroltobeoperatedwithoutoperatingthehigh voltagetransferswitches(TEST). 13 FAULT-BLOCKOPERATEDlamp Indicatesfault-blockhasoperated(partoffault-blockaccessory). 14 RESETswitch(S7) Resetsthecontrolafterafaultblockoperation(partoffault-blockaccessory). S3mustbeinMANUALposition. 15 Fuses VoltageinputofallthreephasesofbothSourceIandSourceII arefusedfor10A-125vac;whitebuttonshowsonfrontoffuseiffuseblows.

TABLE 4Description and Use of Operating Controls and Indicators

Note A —Tabprovidedtolockswitchknobinsetposition;stopscrewpreventsinadvertentselectionofparallelreturntransfermode.

1

2

3

4

5 6 7 8

9

10

11

12

13

14

15


�6

OPERATING INSTRUCTIONS

Initial Operation

WARNING: Hazardous voltage. Never rely ontheopenpositionof theoperatinghandleor the

contactposition indicator; it doesnot ensure that theline is deenergized. Follow all locally approved safetypractices.Failure tocomplycan result incontactwithhighvoltage,whichwilcausedeathorseverepersonalinjury. G123.1

To place the automatic transfer scheme into service,proceedasfollows:

CAUTION: Equipment misoperation. Source I andSourceIIhighvoltageswitchescanbeparalleledinthemanualoperationmodeevenifSOURCEPREFERENCEswitch,S4,issetforNP(non-paralleloperation).Makesure both sources are in synchronism if a manualparalleloperationistobeperformed.Failuretocomplycanresult inmisoperation (unintendedoperation)andequipmentdamage. T304.0

�. Theswitchesonthefrontpanelshouldbepositionedasfollows:

A.S1(MANUALOPER.SOURCEI)—OFF

B.S2(MANUALOPER.SOURCEII)—OFF

C.S3(OPERATlONSELECTOR)—MANUAL

D.S4 (SOURCE PREFERENCE AND RETURNMODE)—settothedesiredmodeofoperation.

E.S5(CONTROLMODE)—NORMAL

2.Set the PREFERRED TO ALTERNATE TIMER andALTERNATETOPREFERREDTIMERasrequired.(SeeTimeDelaysectioninthismanual.)

3.CheckthatallinstallationconnectionsarecompleteasshownintheappropriateconnectiondiagramFigures5through8.

4.Make sure both high-voltage transfer switches areopen.

5.Withallsixfusesinplace,energizebothpowersourcestothecontrol.

A.SOURCEIENERGIZEDlampshouldbeon.

B.SOURCEIIENERGIZEDlampshouldbeon.

C.SWITCHIOPENlampshouldbeon.

D.SWITCHIIOPENlampshouldbeon.

6.Dependinguponwhichsourceisthepreferredsource,momentarily operate either S1 or S2 to the CLOSEposition.TheappropriateswitchwillclosetoenergizetheloadanditsstatusindicatinglightswilltransferfromOPENtoCLOSED.

7.Place the OPERATION SELECTOR SWITCH (S3) toAUTO.TheScontrolisinservice.Nofurtheroperationwilloccuruntilthepreferredsourcevoltageislost.

DANGER: Hazardous voltage. Contact withhazardousvoltagewillcausedeathorseverepersonal

injury. Follow all locally approved safety procedureswhen working around high- and low-voltage lines andequipment. G103.3

IMPORTANT: Before energizing the installation,anunderstandingof the functionsof theoperatingcontrolsand indicating lights isessential. (Refer toTable4andFigure14.)

�7

S260-75-1!

SAFETYFOR LIFE

Timer Settings

IMPORTANT:Putcontrol inmanualmodeprior tochanging timer setting. There is no fault currentprotectionwheninmanualmode.Failuretocomplycancauseunintendedoperation.

The two digital timers are identical. One timer controlsthe time required to transfer from the preferred sourcetothealternatesource,theothertimercontrolsthetimeto transfer from the alternate source to the preferredsource.

Thetwodigitaltimersfeaturethefollowinginformationalindicatorsandadjustmentcontrols:

Digital Time Display

LEDdisplaysthetimecount.Thetimercountsupuntilitreachesthetimedelaysettingofthethumbwheelswitch.

Time Range Selector

Thetimerangeselectorswitchcanbesettosixdifferentpositionswithaflatscrewdriver.Eachpositionindicatesatimerange.Seechartbelow.Thetimerangeselectorispresettothetimerangeof0.1to99.9seconds.

Thumbwheel Time Setting

Set the desired time delay setting by rotating thethumbwheel switch. For example, if the thumbwheeltimesettingis345thetimerwilltimeoutin34.5secondsbasedoff the time rangeselectorsettingof0.1 to99.9seconds.Note: The thumb-wheel time setting, which does not turn

infinitely,shouldnotbeturnedbeyondthelimit.

S

9 9 9

9 9 5433.45OUT

Thumb-Wheel Time Setting

Decimal Point Indicator

Time RangeSelector

OUT Indicator

Digital TimeDisplay

Figure �5. Digital Timer and Time Ranges.

S

0.01to

9.99sec

9.9999.999999.999999.9

Indication

TimeRange

S S M M H

0.1to

99.9sec

1to

999sec

0.1to

99.9hours

1to

999min

0.1to

99.9min

IMPORTANT: Thumb-wheel time setting must besecurelyturned.Incompletesettingmaycausetimermalfunctionandcontrolmisoperation.

Out Indicator

Theout indicatorbriefly lights tosignalcompletionofatimingintervalandconfirmthatthetimerhasoperated.

Normal OperationThecontrolwill react toongoing linevoltageconditionsand operate automatically as programmed. If equippedwith the fault block accessory, transfer to the alternatesourcemaybepreventedwhenlossofvoltageisduetoaload-sidefault.SeeFault BlockOperating Instructions sectionforproceduretorestoreservice.

THEORY OF OPERATION—BASIC S CONTROLRefertoFigures16and17forthefollowingsections:

Voltage SensingTheScontrolwilltransfertheloadtoanalternatesourcewhenoneormorephasesofthepreferredsourceislost,providednormalvoltageispresentonallthreephasesofthealternatesource.Toperformthisfunction,thecontrolrequires three-phase, low-voltage (120 Vac) input fromboththepreferredandalternatesourcesofpower.InputfromSourceIisconnectedtoterminalsA,B,CandG1ofTB2,andinputfromSourceII isconnectedtoterminalsX,Y,ZandG2.

EachofthethreeinputphaseleadsforbothSourceIandSource II is shunted to ground by a capacitor–varistorcombinationtoprovidesurgeprotectiontothecontrol.Onthepreferredsourcesideofthevoltagesensingcircuitry,the input lines then pass through 10 Amp fuses to thevoltagesensingrelays:R2 (PhaseA),R9 (PhaseB)andR10(PhaseC).R9andR10areconnecteddirectlytotheinputwhileN.O.contactsofR9andR10areinserieswiththeR2coil. Thus,R2canbeenergizedonly if all threeincomingphasevoltagesareaboveapredeterminedvalue(approximately97volts).Asimilararrangementisusedforthealternatesourcesensingrelays.R6canbeenergizedonlyifR7andR8areenergized.Thetransferbusacrossthe top of the schematic diagram), which provides theoperatingpowerforthecontrolisnormallyenergizedfromPhaseY.IfR7dropsout,duetolossofPhaseY,R11willbeenergizedfromPhaseB(throughN.C.contactofR7)to re-energize the transferbus.ThecontactsofR7andR11aresoconnectedthatthetransferbuscanneverbesimultaneouslyenergizedfrombothBandYphases.


�8

Automatic Transfer, Preferred to AlternateThefollowingassumptionsaremade:

•OPERATIONSELECTORswitch(S3)isinAUTO.

•SOURCEPREFERENCEandRETURNMODEswitch(S4)isinPREFl-P(Terminal2ofeachdeckconnected).

•CONTROLMODEswitch(S5)isinNORMAL.

•Scontrolisinaquiescentstate.

•SourceIhigh-voltagetransferswitch(SW-I)isclosedandSourceIIhighvoltagetransferswitch(SW-II)isopen.Note:The actuators of both high-voltage transfer

switchesareshown in theswitchopenpositiononthe schematic diagram. Following each openingoperation,themotorrechargestheactuatorspringsandthecutoutswitchreturnstothepositionshownin the schematic. However, when the high voltagetransferswitch isclosed, theselectorswitchof theactuatormechanismisoppositetothatshownintheschematic.

Ifoneormorephasesofthepreferredsource(SourceI)arelost,R2willdropoutandtheSOURCEIENERGIZEDlamp (L1) will go out. N.C. contacts 1-7 of R2 closecompletingthecircuittothePREFERREDTOALTERNATETlMER(TM1) through4-7ofR6 (which isenergized),7-4ofR1,anddeckJofS4.WhenTM1timesout, its5-6contactsclose toenergize thecoil ofR1 in the resetdirectioncausingR1to transfer.Diodes in thecircuitofthissingle-coilmagneticallyheldrelaydeterminewhether“latching”or“resetting”occurs.

ThetransferofR1energizesthetripcoilofSourceIhigh-voltagetransferswitch(SW-I)asfollows:

Transferbusvoltagepassesthroughterminals5-1ofS3,contact9-3ofenergizedR1,andterminals4-3ofS5.ItisthenimpressedonN.C.contact7-2ofR4andpassesthrough deck B of S4 to output terminal 13 of TB-1.Terminal13 isconnectedto the internalselectorswitchin the actuator of SW-I (which is closed when SW-I isclosed),throughthetripcoiltoground(terminalG).

AfterSW-Ihasopened,theselectortransferstoconnectterminal3 to terminal4,whichenergizes terminal16ofTB1.Inturncontacts2-6ofS3,deckCofS4,andterminal25ofTB-1areenergizedtooperatetheclosecoilofSW-IIandclosetheswitch.

SW-IwillnowremainopenandSW-IIcloseduntilSourceIvoltageisrestored.

Return Transfer, Parallel TransitionWhenSourceIpowerisrestoredonallthreephases,R2willpickupandSource IEnergized lamp (L1)will light.Contact 9-6 of R2 closes to energize ALTERNATE TOPREFERRED TIMER (TM-2) through contact 8-2 of R1,anddeckKofS4.AfterTM2timesout,itscontacts5-6closetoenergizethecoilofR1throughdiodeDLinthelatchingdirectioncausingR1totransfer.

The transfer of R1 energizes the close coil of SW-I asfollows:

Transferbusvoltagepassesthroughterminals5-1ofS3,contacts9-6oflatchedR1,andterminals5-6ofS5.Itisthen impressed on N.C. contact 7-2 of R5 and passesthroughdeckAofS4tooutputterminal15ofTB-1.Thisactivates the close coil in SW-I. When SW-I closes, itsauxiliary contact “a” closes to energize R5 (via TB1-24anddeckEofS4).Contact7-5ofR5closestoenergizeTB1-23 through deck D of S4. Voltage at TB1-23 willactuatethetripcoilofSW-IItoopentheSourceIIhigh-voltagetransferswitch.Note:The Source I high-voltage switch (SW-I) closes before

theSourceIIhigh-voltageswitch(SW-II)openstoeffectaparallel return transition.SW-IwillnowremainclosedandSW-IIopenuntilSourceIvoltageislostorachangeofcontrolsettingsismade.

Return Transfer, Non-Parallel TransitionThefollowingassumptionsaremade:

•SOURCE PREFERENCE and RETURN MODEswitch(S4)isinPREFl-NP(Terminal3ofeachdeckconnected).

•SourceIhaslostoneormorephasesandtheloadhasbeentransferredtoSourceIIaspreviouslydescribed(SW-IopenandSW-IIclosed).

•ControlisinaquiescentstatewithlatchingrelayR1in the resetposition (contacts9-3and8-2closed)andR2isdeenergized.

When Source I power is restored on all three phases,R2 will pick up, closing its contact 9-6, and energizetheALTERNATETOPREFERREDTIMER(TM-2)throughcontact8-2ofR1,anddeckKofS4.AfterTM-2timesout,its5-6contactclosestoenergizethecoiIofR1throughdiodeDLinthelatchingdirectioncausingR1totransfer,closingits6-9contact.

Inthiscase,thetripcoilofSW-IIisimmediatelyenergizedthroughthefollowingcircuit:

Terminals5-1ofS3,N.C.contact9-6ofR1,terminals5-6ofS5,N.C.contact7-2ofR5,anddeckDofS4tooutputterminalTB1-23toactivatethetripcoilofSW-IIandopentoSourceIIhigh-voltagetransferswitch.

When SW-II opens, its selector switch transfers toimpressthevoltageatTB1-23ontoTB1-26which,inturn,energizesTB1-15throughterminals3-7ofS3anddeckAofS4.VoltageatTB-15willactuatethequick-closecoilofSW-ItoclosetheSourceIhigh-voltageswitch.

Note:In this instance, theSource IIhighvoltageswitch (SW-II)opensbeforetheSourceIhighvoltageswitchcloses,to effect a non-parallel return transition. SW-I will nowremainclosedandSW-II openuntilSource I voltage islostorachangeismadeinthecontrolsettings.

�9

S260-75-1!

SAFETYFOR LIFE

No Preference ModeAssume the Source I high-voltage switch (SW-I) isclosed and Source II high-voltage switch is open. WiththeSOURCEPREFERENCEandRETURNMODEswitch(S4) inNOPREF-NP (Terminal4ofS4connected), lossofSourceIvoltageononeormorephaseswillopentheSource Ihigh-voltageswitch (SW-I)asdescribed in theAutomaticTransfer,PreferredtoAlternatesectionofthisdiscussion.

UponrestorationofSourceIvoltage,R2isre-energized.However, due to the positioning of decks G and H ofS4, neither timer canbeenergizedsinceboth theN.C.contacts1-7ofR2,and9-3ofR6areopen(bothrelaysareenergized).

The S control is now in a quiescent state with SW-IIclosedandSW-Iopen.ThisconditionwillcontinueuntileitherSourceIIislostorachangeismadeinthecontrolsettings.IfSourceIIislost,delayintransfertoSourceIwillbetimedbyTM-2.

Preferred Source II ModeWiththeSOURCEPREFERENCEandMODEswitch(S4)ineitherPREFII-P(Terminal6ofS4connected),orPREFII-NP (Terminal 5 of S4 connected) the description ofoperationissimilartothe“AutomaticTransfer,PreferredtoAlternate”and“ReturnTransfer,ParallelTransition”or“ReturnTransfer,Non-ParalleledTransition”aspreviouslydescribedexcept thatSource II is thepreferred source(controlledbySW-II)andSourceIisthealternatesource(controlledbySW-I).

Control Mode Switch, S5If S5 is placed in the center-off TEST position, thereisnocircuittoeitherthecloseortripcoilsofeitherhigh-voltage transfer switch. This position of S5 is used tocheck sensing circuitry, timers, and the latching relaywithoutaffectingthestatusofthehigh-voltageswitches.

If S5 is placed in the HOLD ON ALTERNATE position,returntransferwillnotoccurafterpreferredsourcevoltageisrestored.AssumetheS3isinAUTO,S4isinPREFl-P,and theScontrol is in thequiescent statewithSourceI high-voltage (SWI) closed and Source II high-voltageswitch(SW-II)open.UponlossofSourceI,R2willagaininitiate a transfer of the latching relay R1 as previouslydescribed, followed by the opening of SW-I and theclosingofSW-2.TheScontrolisnowinaquiescentstateinwhichSW-2will remain closedandSW-Iwill remainopenevenwhenSourceIpowerisrestored.WhenSourceIisreenergized,R1willtransferbacktothelatchpositionandcloseitscontact9-6.However,becausedeckLofS4isopen,powercannotbeprovidedtothetripcoilofSW-IIortheclosecoilofSW-I.

Manual ControlWhentheOPERATIONSELECTORswitch(S3)isplacedinMANUAL,itconnectstheMANUALOPER.SOURCEIswitch (S1)andtheMANUALOPER.SOURCEIIswitch(S2) to the transfer bus. Power can then be suppliedto either thecloseor trip coils of eitherSW-I orSW-II.Contacts3-7and2-6ofS3areopenedintheMANUALposition so that opening of one high-voltage transferswitchdoesnotcauseautomaticclosingoftheother.Inthemanualmodeofoperation,itispossibletohavebothhigh-voltageswitchesopen,eitherswitchclosed,orbothswitchesclosed.

Indicating LampsThe LAMP TEST switch (S6) is provided for checkingthe various incandescent indicators on the front paneloftheScontrol.Intheclosedposition,allthelampswillbe energized through a diode network to check theircondition.

Intheopenposition,thediodenetworkisolatesthelampsfrom the test switch so that it has no effect on normalcircuitoperation.


20

TROUBLESHOOTING—BASIC S CONTROL



WARNING: Hazardous voltage. Solidly ground allequipment. Failure to comply can result in death,

severepersonalinjury,andequipmentdamage. T223.2

GeneralThis troubleshooting guide is intended to assist inlocalizing problems that may be encountered in theoperationoftheload-transferscheme.Aftertheproblemarea has been localized, general troubleshooting andcircuit tracing techniques can be used to pinpointthe cause. A fundamental understanding of the basicoperationisessentialincarryingoutthesetroubleshootingprocedures.(SeeTheory of Operationsection.)

Schematic diagrams, Figures 16 and 17, are used asreferences throughout this guide. The physical locationof the various circuit components and terminals areidentifiedinFigure27.

Remove the Control from Service

The following warning only applies to controls equipped with the Fault Block Accessory:

�.De-energizeSourceIandSourceIIvoltage.

2.Disconnectcablesfromthecontrol.

DANGER: Hazardous voltage. Contact withhazardousvoltagewillcausedeathorseverepersonal

injury.Followalllocallyapprovedsafetyprocedureswhenworkingaroundhighandlowvoltagelinesandequipment. G103.3

WARNING: Hazardous Voltage. De-energizeswitchgear before attempting to disconnect

controlcablefromcontrol.Failuretodosomayresultincontactwithhighvoltagepulse(300Vpeak)fromtheCTprotectioncircuit.Failuretode-energizeswitchgearcanresultincontactwithhighvoltage,whichwillcausedeathorseverepersonalinjury. G124.0

Basic TroubleshootingAquickcheckof thebasic transferoperationwhile thecontrol is in service can be made using the followingprocedure:

Source I or Source II Preferred Operation�.Set CONTROL MODE switch (S5) to TEST. This

wilI remove thecontrol fromserviceandallow it tooperate without operating the high-voltage transferswitches.

2.Check LATCH RELAY STATUS TEST terminals(T-1,T-2)toground(T-3).120VacatT-1indicatesthecontrolisinSourceImode;120VacatT-2indicatesthecontrolisinSourceIImode.CheckifthisagreeswiththeSOURCEPREFERENCEswitchsetting.

3.Removepreferredsourcevoltagebyunscrewingoneof thephase fuses fromtheapplicablesource.ThePREFERREDTOALTERNATETIMERwillstart.

4.When the timer runs out, the latch relay (R1) willtransfer;indicatedbyatransferofthe120Vacsignalatthetestterminals.

5.Replacetheremovedfusetore-energizethepreferredsource.TheALTERNATETOPREFERREDTIMERwillstart.

6.When the timer runs out, the latch relay (R1) willtransferbacktoitsoriginaloperatingposition.

7.ReturntheCONTROLMODEswitch(S5)toNORMALtoreturnthecontroltoservice.

IMPORTANT:IfControlModeSwitchS5isplacedinthe“Normal”position,theS-controlwillplacethehigh-voltagetransferswitchesintotheconfigurationthat iscurrentlyselectedbytheSourcePreferenceSwitchS4.Thismayresultinanunintendedtransfer.Make sure the desired state of the high-voltagetransfer switches match the setting of S4 beforereturningS5tothe“Normal”position.

2�

S260-75-1!

SAFETYFOR LIFE

No Preference Operation�.SetCONTROLMODEswitchS5totheTESTposition.

Thiswill remove thecontrol fromserviceandallowoperationwithoutoperatingthehigh-voltagetransferswitches.

2.Check the setting of the SOURCE PREFERENCEswitch(S4).ItshouldbeinthecenterNoPreferenceposition.

3.CheckLATCHRELAYSTATUSTESTterminals(T-1,T-2)toground(T-3).120VacatT-1indicatesthecontrolisintheSourceImode.120VacatT-2indicatesthecontrolisintheSourceIImode.

4.Remove source voltage by unscrewing one ofthe phase fuses from Source I if T-1 is energizedor from Source II if T-2 is energized. If a Source Ifuse is removed, the PREFERRED TO ALTERNATETIMERwillstart. IfaSourceII fuse isremoved,theALTERNATETOPREFERREDTIMERwillstart.

5.When the timer runs out, the latch relay (R1) willtransfer as indicated by a transfer of the 120 Vacsignalatthetestterminals.

6.Replacetheremovedfusetore-energizethepowersource.No timerswillstartand latch relay (R1)willnottransfer.

7.Unscrewoneofthephasefusesfromtheothersource.If aSource II fuse is removed, theALTERNATETOPREFERRED TIMER will start. If a Source II phasefuse is removed, the PREFERRED TO ALTERNATETIMERwillstart.

8.When the timer runs out, the latch relay (R1) willtransferbacktoitsoriginaloperatingposition,againindicatedbya transferof the120Vacsignalat thetestterminals.

9.Replacetheremovedfusetore-energizethepowersource.No timerswillstartand latch relay (R1)willnottransfer.

�0.PlacetheCONTROLMODEswitch(S5)tothenormalposition. If switch S5 is left in the TEST position,the S control will be inoperative on automaticoperation.

Indicating LampsAlthoughnotessentialtocontroloperation,theindicatinglampsprovideusefuloperatinginformation.Alllampsare120Vacoperatedhalf-wavethroughdiodes.

Foraquickcheckofthelampdiodes,depresstheLAMPTESTswitch,S6.ThetwoOPENandtwoCLOSElampsshould glow with equal brilliance, the green appearingslightlylessintense,andtheSOURCEIENERGIZEDandSOURCEIIENERGIZEDlampsshouldnoticeablyincreaseinbrilliance(theselampsareenergizedfromtwophases,120degreesapart,insteadofasinglebus).

Note: TheOPENlampcircuitincludestheimpedanceoftheclosecoilormotorofthehigh-voltageswitchactuator.

Verification of FusesFusescanbecheckedonthefrontpanelofthecontrol.Ifthefusesareblownandrequirereplacement,thewhitebuttonsonthefrontpanelwillshow.Refertoitem15inFigure13andTable4.

Advanced Troubleshooting

Usetheoutputofthecontrolproceduretodetermineiftheproblemliesinthecontrolorthehigh-voltageswitches.Iftheconditionsoftheoutputprocedurearesatisfactory,test the high-voltage switch. If the conditions of theoutput procedure are unsatisfactory, test the manualcontrolfunctions.Iftheconditionsofthemanualcontrolfunctionsprocedureare satisfactory, test theautomaticcontrolfunctions.

IMPORTANT: The control should be removedfrom service prior to conducting the advancedtroubleshootingprocedures.


22

TABLE 5Continuity Check of High-Voltage Switches

Switch Ohmmeter ReadingReceptacle Pin Switch Open Switch Closed

TypeVR,VLR,VRV—StandardOperator

BtoC Motor ∞ BtoD ∞ TripCoil BtoE ∞ 0 DtoF 0 0

TypeVR,VLR,VRV—QuickCloseOperator

AtoD * ∞ BtoC QuickCloseCoil ∞ BtoD ∞ TripCoil BtoE ∞ 0 DtoF 0 0

TypeTSC**

BtoC Motor ∞ BtoF ∞ ∞ BtoE ∞ 0 DtoB ∞ Motor DtoF 0 ∞

TypePST-6withCInterrupter#1

EtoR CloseCoil ∞ MtoN ∞ 0 PtoE * ∞ StoV 0 ∞ TtoU ∞ TripCoil


BtoC ∞ 0 DtoE * ∞ EtoF CloseCoil ∞ GtoK 0 ∞ HtoJ ∞ TripCoil


EtoF ∞ AtoC ∞ CtoE ∞ BtoC ∞ CtoD ∞


LtoM ∞ 0 GtoJ 0 ∞ JtoL ∞ TripCoil HtoJ * ∞ JtoK CloseCoil ∞

Output of the ControlTodetermineiftheproblemisinthecontrolorthehigh-voltagetransferswitch,proceedasfollows:

�.Disconnecttheswitchesfromthecontrol.

2.Place OPERATION SELECTOR switch (S3) toMANUAL.

3.PlaceSOURCEPREFERENCEandRETURNMODEswitch(S4)toNOPREF.

4.With the control energized, check the voltage togroundat the “TransferSwitchOperators” terminalboard,TB1,perTable6.

5.If these output voltages are obtained, check thehigh-voltage switch. If the output voltages are notobtained,checkthemanualcontrolfunctions.

High-Voltage SwitchNormal control output at TB1 but failure to operatesuggestsamalfunctioningswitch.

�.With an ohmmeter, check the resistance betweenpoints of the high-voltage switch actuator perTable5.

2.If the control circuit of the switch operator checksout, the trouble may be mechanical. Refer to themaintenancemanualfortheswitch.

*Will read motor resistance if closing spring is not charged,willreadinfinityifclosingspringischarged.

**The manual lockout level must not be pulled down duringthetest.

23

S260-75-1!

SAFETYFOR LIFE

Manual Control FunctionsAbnormaloutputreadingsatTB1indicateamalfunction-ing control. This procedure describes the terminalfunctionsundermanualdirectionandsuggestsareasforinvestigation.

�.Terminals 11 and 21 provide the power to chargethespringsintheswitchactuatorandareconstantlyenergized.Ifterminals11and21arenotenergized,thetransferbusisnotenergized.

A.Make sure that either phase B of the preferredsource or phase Y of the alternate source isenergized.Thesephasessupplythetransferbus.Measurebeyondthefuses.

B.RelaysR7andR11controlpowertothetransferbus.RelayR7picksupwhenphaseYisenergized;RelayR11picksup ifphaseB isenergizedandphaseYisdeenergized.

2.Terminals15and25provide120Vacclosingpower(15 closes Source I switch, and 25 closes SourceII switch). Terminals 13 and 23 provide 120 Vacopening power (13 opens Source I switch and 23opensSourceIIswitch).

A.Terminals 13, 23, 15 and 25 are energized fromthe transfer bus through the MANUAL OPER.switches,S1andS2.

(�)If thecontrol isequippedwith the faultblockaccessory,normallyclosedcontactsofthefaultblockrelay(RY1)areconnectedbetweentabsFPandFRof the relay tieboard tocompletethecircuittoterminal15andbetweentabsFSandFTtocompletethecircuittoterminal25.

(2)If the control does not use the fault blockaccessory,jumpersareprovidedbetweentabsFPandFRandFSandFToftherelaytieboardtocomplete theclosingpowercircuits to thetransferswitches.

3.Terminals14and24aregroundedby an “a” contact (N.O.) in theH.V.transferswitchestoenergizerelays R4 and R5 respectivelyduring the “opening” half of aparallelreturntransfer.

4.Terminals 16 and 26 areenergized (120 Vac) on the“closing”halfofanon-parallelreturn transfer. They areenergized from a “b” contact(N.C.) in the H.V. transferswitches;16isenergizedfromSource I high- voltage switchand 26 is energized fromSourceIIhigh-voltageswitch.

Voltage to Ground MANUAL OPER. MANUAL OPER.Term SOURCE I SOURCE II on Switch (S�) Switch (S2) TB� Quiescent Close Open Close Open 11 120Vac 120Vac 120Vac 120Vac 120Vac 15 170Vdc* 120Vac 170Vdc* 170Vdc* 170Vdc* 14 170Vdc* 170Vdc* 170Vdc* 170Vdc* 170Vdc* 13 0 0 120Vac 0 0 16 0 0 0 0 0

26 0 0 0 0 0 23 0 0 0 0 120Vac 24 170Vdc* 170Vdc* 170Vdc* 170Vdc* 170Vdc* 25 170Vdc* 170Vdc* 170Vdc* 120Vac 170Vdc* 21 120Vac 120Vac 120Vac 120Vac 120Vac

TABLE 6Voltage Readings on TB�

* Rectified 120 Vac impressed on capacitor. Drops to 0 if LAMP TEST switch (S6) is depressed.

Automatic Control FunctionsThecontrolmayoperateproperlybymanualdirectionbutmalfunctioninitsautomaticmode.TheautomaticsectionrespondstothepositionsofR2andR6inconjunctionwiththeselectedoperatingmodeassetonS4,theSOURCEPREFERENCEandRETURNMODEswitch.Itsoutputisthesingle-coillatchingrelay,R1.

�.R2isenergizedfromphaseAofSourceIthroughN.O.contactsofR9inphaseBandR10inphaseC.TheactionofR2canbeobservedthroughitstransparentcoverandcanbecheckedelectricallyacrosstabs31and32ontherelaytieboardwhichconnecttoaN.C.contactoftherelay.

2.R6 is similarlyenergized fromphaseXofSource IIthroughR7inphaseY,andR8inphaseZ.Tabs41and42connecttoaN.C.contactofR6.

3.Operation of the appropriate time delay relay canbe checked by verifying that the LED timer isilluminated.

4.The single-coil latching relay (R1) is electricallyoperatedandmagneticallyheld.Itislatcheddirectlyfromthe120VactransferbusthroughdiodeDLintheautomaticmodeordiodeDL1inthemanualmode.It is reset through the15KohmresistorandeitherdiodesDRorDR1.

5.Withthecontrolinanautomaticmodeofoperation,thepositionofthelatchingrelaycanbedeterminedat theLatchingRelayTest jacks (T1,T2,T3)onthefrontpanelofthecontrol.

A.When120VacispresentbetweenT1andT3,therelay is in the “latched”positionand thecontrolseekstoconnecttheloadtoSourceI.

B.When 120 Vac is present between T2 and T3,therelayisinthe“reset”positionandthecontrolseekstoconnecttheloadtoSourceII.

C.Ifthelatchingrelayassumestheexpectedpositionafterthepropertimedelay,theautomaticsectionofthecontrolisfunctioningproperly.


24

Figure �6a.Schematic diagram basic S control operating Types VR, VLR, VRV, TSC, or PST-9 switchgear (page � of 2).

25

S260-75-1!

SAFETYFOR LIFE

Figure �6b.Schematic diagram basic S control operating Types VR, VLR, VRV, TSC, or PST-9 switchgear (page 2 of 2).


26

Figure �7a.Schematic diagram for Type S control operating Type PST-6 switchgear (page � of 2).

27

S260-75-1!

SAFETYFOR LIFE

Figure �7b.Schematic diagram for Type S control operating Type PST-6 switchgear (page 2 of 2).


28

FAULT BLOCK ACCESSORY(Applicable to VR, VLR, VRV, TSC, CS, and PST-6 switchgear.)

Thefaultblockaccessory ismountedintheupperrightcornerofthebackpanelofthecontrol,Figure18.Controlsandinstructionsforoperatingtheaccessoryarelocatedonthefrontpanelabovetheinputfuses,Figure19.

General DescriptionInresponsetofaultcurrentabovepreselectedphaseorground levels, the accessory is activated and latchedtodisablebothhigh-voltageswitches.Thusa load-sidefaultfollowedbylossofpotentialwillresultinpartialloadtransfer opening the connected source but not closingthefaultedloadintothealternatefeeder.

Theaccessorymustbemanuallyresetatthecontrolpaneltorestoreservicetotheload.Ifactivationofthefaultblockaccessory isdue toa temporary fault (preferredsourcevoltage is restored before the transfer delay timer runsout),linecurrentof5Amps,ormore,flowingthroughthehigh-voltageswitchwillautomaticallyresettheaccessoryinapproximately10to15seconds.

ACTUATINGLEVELPRINTEDCIRCUITCARD(FIGURE18)

TERMINALBLOCKFOREXTERNALCONNECTIONS

RAISEDFAULTLEVELDURATIONTIMER

Figure �8. Fault block accessory mounted in upper-right corner of the back panel. 020080KM

Topreventthefaultblockaccessoryfrombeingactivateddue to inrushcurrent thatmayoccurasa result of thebackupopeningandclosing,aninrushrestraintfeatureisbuiltintotheaccessorylogic.Uponlossofthepreferredsourcevoltage,theinrushrestraintoperatestoincreasethe phase fault actuating level by a predeterminedmultipleforapredeterminedtimeaftervoltageisrestored.Simultaneously,groundfaultcurrentdetectionisblockedcompletelyforthesametimeinterval.Whenthetimerunsout,boththephaseandgroundcurrentactuatinglevelsreturntotheirnormalvalues.

To operate the fault block accessory, the Source I andSource II high-voltage switches must be equippedwith 1000:1 ratio current transformers to monitor themagnitudeofthelinecurrentandanauxiliary“a”contact.Thebushingcurrenttransformersandassociatedwiringareprovidedasafactory-installedaccessorytothehigh-voltageswitch.

Accessory SettingsThe selected phase and groundfault actuating levels should begreaterthananypeakloadphasecurrentorzero-sequence(ground)current, but less than the tripsetting of the backup protectivedevice. A general recommenda-tionistosetthephaseandgroundactuating levels toapproximately80%ofthephaseandgroundtriplevelsofthebackup.

Thephasefaultcurrentminimumactuating level is determinedby a plug-in circuit card, Figure20. Cards are available for 80,112,160,224,320and448Ampactuatinglevels.Thegroundfaultcurrentminimumactuatinglevelisdeterminedbyaresistorcartridgethat clips on to the phase card.Cartridges are available for 10,14,20,28,40,56,80,112,160,224,320and448Ampactuatinglevels.

Figure �9.Fault block accessory controls and operating instructions plate.

FAULTBLOCKOPERATEDSWITCHIndicatesthatthefaultblockaccessoryhasoperated.

INSTRUCTIONLABELProvidesinstructions

forresettingthefaultblockaccessory.

RESETSWITCH(S7)ReactivatestheScontrol

afterafaultblockoperation.

020077KM

29

S260-75-1!

SAFETYFOR LIFE

Theactuatinglevelmultiplierfortheinrushrestraintfeatureforphasefaultsissetbyajumperwireconnectedtoatabonthecircuitcard.TabsareprovidedforX1,X2,X4,X6,X8andBLOCKsettings.Thedurationoftheraisedlevelissetbyaknobonthetopofthetimer(Figure18).Thetimerisinfinitelyadjustable0.1to5.0seconds.Nosettingsarerequiredforgroundinrushsinceitisautomaticallyblockedforthedurationthephaselevelisraised.

Operating InstructionsThe FAULT BLOCK OPERATED lamp on the front panelof the control, Figure 19, will light when the fault blockaccessoryisactivated.Toresettheaccessory:

�.Move the OPERATION SELECTOR switch (S3) toMANUAL.

2.DepressandholdtheRESETswitch(S7)untilthelampgoesout,(approximately6-10seconds)indicatingtheaccessoryhasreset.

3.Torestoreservice,returntheOPERATIONSELECTORswitch(S3)toAUTOMATIC;thepreferredsourcehighvoltageswitchwillclose.

OR

OperateeithertheMANUALOPER.SOURCEIswitch (S1)ortheMANUALOPER.SOURCEIISwitch(S2), asapplicable,torestoreservicemanually.

Note:Instructions for operating the fault block accessoryalsoareprintedonthefrontpanelofthecontrol(Figure19).

Theory of Operation—Fault Block AccessoryThefaultblockaccessorypreventsautomaticclosureintothealternatesourcewhenlossofpreferredsourceresultsfromafaultontheloadtap.Theschematicdiagramforthefaultblockaccessory,Figure21,isusedasreferencethroughoutthisdiscussion.

Overcurrent SensingThe output of bushing current transformers in both theSourceIandSourceIIhighvoltageswitchesareappliedtothefaultblockaccessoryviaterminalslA,IB,IC,INandIX,IY,IZ,INrespectively.Whentheloadcurrentthroughtheswitchexceedsthephaseorgroundactuating levelselected,therelaycontactsinthefaultblockaccessory(contacts7-8and10-11of relayRY1-B), located in theclosingcircuitsofbothhighvoltageswitches,areopened.Subsequentclosingofeitherswitch isblocked ineithertheautomaticormanualmodeoftheScontroluntilthefaultblockaccessorycircuitryisreset.

Phase Fault OperationReferring to the accessory schematic diagram, Figure21,thephasecurrentsarerectifiedbythediodebridgesD103throughD116.CurrentoutofthepositivesideofthebridgepassesthroughdiodeD127anddividesintotwoparallelcircuits.OnecircuitconsistsofzenerD123andtheminimumphaseactuatingresistorR301totheothersideofthebridge.Theothercircuitconsistsofnormallyclosedcontact(1516)oflatchingrelayRY1,diodeD201,andcapacitorC201totheothersideofthebridge.C201,chargedbyloadorfaultcurrent,providestrippingenergyforRY1.

The current through R301 produces a voltage dropproportionaltothelinecurrentwhichisimpressedacrosstheseriesresistorstringR101,R102,andR103.AportionofthisvoltageisappliedthroughdiodeD120tothebaseoftransistorQ201.

When this voltage exceeds the break-down voltage ofzenerD212andthebaseemitterjunctionsofQ201andQ202, Q201 will conduct causing Q204 to conduct. Inturn,Q204providesthegatingcurrenttoturnontheSCR(Q206)todischargecapacitorC201throughthetripcoilofthelatchingrelayRY1.Contacts10-11and7-8ofRY1(inserieswiththeclosecoilsofthehighvoltageswitches)open toprevent thehighvoltageswitches fromclosinguntilthefaultblockcircuitryisreset.

AnimportantfeatureofthisaccessoryisthatatripsignalcannotbeinitiateduntilthereissufficientchargeonC201to activate the trip coil of RY1. Transistors Q201 andQ204,effectivelyinseriesacrossC201,cannotconductuntilthevoltageacrossC201issufficienttobreak-downzenerdiodesD211andD212.

020078KM

PHASECURRENTLEVELMULTIPLIERSETTINGFORINRUSHCURRENTRESTRAINT.

GROUND-ACTUATINGCURRENTRESISTORCLIPSTOTHEPHASECARD

Figure 20.Phase fault current actuating level printed circuit card.


30

Figure 2�a.Schematic diagram – fault block accessory (page � of 2).

SOURCE IH.V. SWITCH

SOURCE IIH.V. SWITCH

AØ

BØ

CØ

AØ

BØ

CØ

PART OF RESISTOR BOARD

GROUND ACTUATINGRESISTORR306

SOURCE IIH.V. SWITCH

a2

a1SOURCE IH.V. SWITCH

+

3�

S260-75-1!

SAFETYFOR LIFE

Figure 2�b.Schematic diagram – fault block accessory (page 2 of 2).

N

14

12

V103

RY1

D26

18

2

1

19

65

FG

FN

11

4

128

12

34

3

4

TM1-2

TM1-3

TM2-2

TM2-3

TB4-3

TB4-4120V IN MANUAL

1

2

TB4-1

TB4-2L71

2RY1TRIPCOIL

S7 RESET 3PST MOMENTARY

MANUAL

AUTO

(120V BUS)

S3

M

N

B

E

TRIP RESET BOARD

D

F

D203

D201

R20947K

R2101K

R216 47K

D2116.8V1N4736A

D201

R20410K

C2035.6

Q201R218 1K

R211100K

C204 3.0

C206 12

C210 0.1

Q202

R2083.9K

D212 5.1V

1N4733A

Q204 2N2905 D202

C201150

C2080.1

200V

Q206 C5V

C207 1.035V

R2033.3K

D209

+

+

+

+

+

+

R2123.3MEG

R205100

R2131.8K

R21456K C205

0.1

Q203

Q2052N6119

R20668K

R21547K

C202150

D208

W

Y

D204

D206

D205R2016.8K-2W

R202470

D207

R207680K

C2090.1200VR217

47K

1617RY1

15

L G

RY1

VWU

RY1

FS FT

5 4 38 7

S T

NO CONNECTIONS

NOTELATCH RELAY CONTACTS (RY1) SHOWN WITHRESET COIL LAST ENERGIZEDUNLESS OTHERWISE NOTED: DIODES ARE 1N4004 TRANSISTORS ARE 2N2102 RESISTORS ARE 1/2 WATT RESISTOR VALUES ARE IN OHMS CAPACITOR VALUES ARE IN MICRO-FARADS

V A

D H

T

RY1

FP FR

11 10

P R

RY1RESETCOIL

LEGEND ACCESSORY TERMINAL BLOCK (TB5) ACCESSORY TIEBOARD TERMINAL

RELAY PIN (RY1 & RY2)

EDGE CONNECTOR TERMINAL (DIODE BOARD) (RESISTOR BOARD) (TRIP-RESET BOARD) TAB ON RELAY BOARD OF S CONTROL TB4 TERMINAL STRIP OF S CONTROL S3 & S7 TERMINALS TM1 (PREFERRED TO ALTERNATE TIMER) AND TM2 (ALTERNATE TO PREFERRED TIMER) TERMINALS


32

Ground Fault OperationThegroundcurrent(thevectorsumofthephasecurrents)flows through the ground actuating resistor, R306, toproduceavoltageacrosstheprimaryofinputtransformerTR1,proportional to thegroundcurrent.Thisvoltage isstepped-up, rectified, and impressed across the seriesresistorstringR104,R105,R106andR107.AportionofthisvoltageisappliedtothebaseofQ201throughdiodeD119.Fromthispoint,groundandphaseoperationsusecommoncircuitrydescribedinthepreceding“PhaseFaultoperation”discussion.

Reset CircuitsOnceactuated,thefaultblockaccessorycanberesetineitheroftwoways.

•Manually—ActuatingtheResetSwitch,S7,onthefrontpaneloftheScontrol,willapply120VactoterminalGofthefaultblockaccessorytieboard.Thisvoltageis rectified by diode D205 and applied to the resettimingcircuit,whichconsistsofR201,C206,andtheprogrammableuni-junction(PUT)Q205.Thisvoltageis also applied to capacitor C202, which providesenergy to the resetcoilof latching relayRY1.Whenthe voltage across C206 reaches the break-downvoltageofthePUT,transistorQ203isthenturnedoncausingC202 todischarge through the resetcoilofRY1.Therelaytransfersandthefaultblockaccessoryisnowreset.

Note:S7 is energized only whenthe Operation SelectorswitchisinMANUAL.

•Automatically—byloadcurrentbelow the minimum actuatinglevelflowingthroughthehigh-voltage switch. The voltagedevelopedbythe loadcurrentisappliedthroughcontact16-17 of RY1 to the reset timingcircuitR207,C206,andQ205.WhenthevoltageacrossC206reachesthebreakdownvoltageofthePUT,Q203isthenturnedoncausingC202todischargethrough the reset coil of RY1.The latching relay transfersand the fault block accessoryisreset.

Note:If the loadcurrent is abovethe actuating level of theaccessory,bothmanualandautomatic reset isdefeatedbyQ202whichconductstoshort-out the reset timingcapacitor C206 throughresistorR205. Figure 22.

Test circuit for testing and troubleshooting the fault block accessory.

Inrush Restraint FeatureThe inrush restraint feature raises the actuating levelof the faultblockaccessorybyamultiple (orblocks itsoperation entirely) for a period following restoration ofsource voltageor anautomaticopen transition transferoperation,topreventinrushcurrentsfromactivatingthefaultblock.

RelayRY2isnormallyenergizedbythephaseBorphaseYvoltagesfromtheScontrolviathe“a”auxiliarycontactsin the two high-voltage switches. When both B and Yphase voltages are lost due to operation of a backupdeviceoropeningofthehigh-voltageswitches,thecoilofRY2isde-energized,closing itscontacts.Contact1-4closestoinsertaparallelingresistoracrossthephaseactuatingresistorR301,reducing itseffectivevalueandincreasing the line current necessary to actuate Q201.Contact5-8ofRY2closestoshort-outthesecondaryofTR1,renderingthegroundsectionoperative.

Uponre-energizationofeitherPhaseBorPhaseYthroughclosingofthebackupdevicesortheclosingofthehigh-voltagetransferswitches,relayRY2isenergized.RY2hasabuilt-intimedelayprogrammablebymeansofaknobinthetopoftherelaycase.Aftertheselectedtimedelayhaselapsed,N.C.contacts1-4and5-6open,returningthefauItblockaccessorytonormaloperation.

33

S260-75-1!

SAFETYFOR LIFE

Testing Fault Block Operation

WARNING: Hazardous voltage caused bybackfeeding of transformers. Isolate potential

transformers from source bushings using potentialtransformer dead-break disconnect switches locatedonthesource-sidepanel.Failuretodosowillresultinriskofpossiblecontactwithhighvoltageatthesourcebushings, which may cause death or severe personalinjury. T273.0

Theoperationofthefaultblockaccessorycanbecheckedbybackfeedinga500:5 (orotheravailableratio)currenttransformer,locatedintheprimaryloopofonephaseofthepreferredsourcehigh-voltageswitch,fromavariable120Vacsource.The500:5ratioprovidesapproximately1 Amp of output test current for every 10 mA of inputcurrent.However,toeliminateerrorduetoCTsaturation,aseparatemeteringCTandmetershouldbeusedtoreadtheactualtestcurrent.

Test Circuit and EquipmentAsuggestedtestsetupisshowninFigure22.Ifthecontrolisequippedwiththeplugandreceptacleaccessory,usetheexistingcablestointerconnectthemotoroperatorsofbothhigh-voltageswitchesandtheCTsensingcircuitsofthepreferredsourceswitchtotheScontrol.Ifplugsandreceptaclesarenotprovided,wire theswitchesdirectlytotheappropriateterminalblocksasshowninFigures6or8.

Figure 23. Disabling ground sensing circuit.

020082KM

�.Disable the ground sensing circuit by shorting thegroundfaultresistor(Figure22).

2.SettheinrushcurrentmultiplieratX1.

3.Close testcircuitswitchesSW2andSW3 toapplyvoltagetothecontrol.

Thepreferredsourcehigh-voltageswitch(HV1)will close.

4.Close test switch SW1 and slowly raise the testcurrent until the FAULT BLOCK OPERATED lightgoeson.

Thetestcurrentshouldbewithinthelimitsspecified inTable7.IfFAULTBLOCKOPERATEDlightfailsto comeonat theexpected level,proceedasfollows:

A.ChecklampwithLAMPTESTswitch(S6).

B.Recheckcalculationsforpropermeterreading.

C.Isgroundresistorcleanlyshortedout?

D.DidlatchrelayR1transferposition?—lampisonlyanoutwardindicationofrelayposition.

E.Areallcableconnectionssecure?

F.Voltage from Accessory Tie Board, Tab D toGround,TabL, shouldbeapproximately15Vdc,average,atactuating level. Ifobservedvoltage isapproximately6voltstoolow,troubleisprobablyintheTripResetBoard;ifvoltageistoohigh,troubleisprobablyineitherDiodeorResistorBoards.

G.AC rms voltage from “IN” to “IA” (or whateverphase is energized) should be about 17 V atactuatinglevel.Ifcorrectvoltageisobserved,theCTinputiscorrect.

IMPORTANT: When checking the phase minimumactuating current the ground fault sensing portionof the accessory must be disabled. Testing on anindividualphasebasiswithoutdisablinggroundfaultsensingwillcausetheaccessorytoactivateatthegroundfaultlevel.

Actuating Actuating Current Limits Current (Amps) Setting (Amps) Minimum Maximum

10 9 11 14 12.6 15.4 20 18 22 28 25.2 50.8 40 36 44 56 50.4 61.6 80 72 88 112 101 123 160 144 176 274 247 301 320 250 352 448 403 493

TABLE 7Test Current Values for Fault Block Accessory

Test Procedure and TroubleshootingPhase Minimum Actuating Current


34

5.OpenSW1andSW2tosimulateabackupclearingthefault.

ThePREFERREDTOALTERNATETIMERwillstart andthepreferredsourcehigh-voltageswitch(HV1) willopenwhenthetimerrunsout,butthealternate sourcehigh-voltageswitch(HV2)willnotclose.

Ifalternatesourceswitch(HV2)closesandthelatch relay(R1)contactsarenotopening,checkforopen contactbetweenAccessoryTieBoardtabsPandR (SourceIHVswitch)andtabsSandT(SourceIIHV switch).

6.Place OPERATION SELECTOR SWITCH (S3) tomanual, and operate MANUAL OPER SOURCE Iswitch (S1)andMANUALOPERSOURCE II switch(S2)toCLOSE.

HVswitch(HV1orHV2)willnotclose.

If either switch closes and the latch relay (R1) contacts are not opening, check for open contact betweenAccessoryTieBoardtabsPandR(Source IHVswitch)andtabsSandT(SourceIIHVswitch).

7.Close test switch SW2 to restore preferred sourcevoltage to the control. After the ALTERNATE TOPREFERRED TIMER runs out, reset the fault blockaccessoryperinstructionsonthefrontpanel.

TheFAULTBLOCKOPERATEDlightwillgooutand the preferred source high-voltage switch will close.

IftheFAULTBLOCKOPERATEDlightdoesnotgo out,theproblemismostlikelyintheTRIPRESET BOARD.

Followsteps8through11toconductacompletecheckinvolvingallthephasesofbothhigh-voltageswitches.

8.ConnectthephasesinseriesasshowninFigure24andretest.

Becauseoftheserieshook-up,pickupshouldoccur at1/2theactuatingcurrentsetting.

Ifpickupcurrentisotherthan1/2ofsetting,the polarityofaCTcouldbereversed.

9.Connectanother twophases in seriesasshown inFigure25andretest.

Resultsshouldbethesameasinprecedingstep8.

Figure 24.Test Connections for Step 8.

Figure 25.Test Connections for Step 9.

A JUMPERA

JUMPER

�0.Repeatstep8and9fortheotherhigh-voltageswitchtocompletecheckingallsixCTs,theirconnectionsandpolarity.

��.Removetheshorting jumperfromthegroundfaultresistoruponcompletionofphasetesting.

Ground Minimum Actuating CurrentWhenchecking thegroundminimumactuatingcurrent,thephase faultsensingportionof theaccessorycircuitmustbedisabledtopreventthepossibilityoferroneoustestresults.Proceedasfollows:

�.Disablethephasesensingcircuitbyplacingashortingjumper from the BLOCK tab on the phase resistorcardtotabLontheaccessorytie-board(Figure26).

2.Repeat steps 2 through 7 of the Phase MinimumActuatingCurrenttestprocedure.

Automatic Reset of Fault Block�.ClosetestswitchesSW2andSW3tosupplyvoltage

tothecontrol.

Thepreferredsourcehigh-voltageswitch(HV1)will close.

2.CloseSW1andraisethetestcurrentuntiltheFAULTBLOCKOPERATED lamp lights indicating that faultblockhasbeenactivated.

3.OpenSW2tosimulatetheback-updeviceopeningandsimultaneouslyopenSW1toclearthefault.

ThePREFERREDTOALTERNATETIMERwillstart torun.

4.CloseSW2tosimulatereclosingofSource1backupdevice.QuicklycloseSW1andraisethetestcurrenttogreaterthan5Ampsbutlessthangroundactuatinglevel.

The FAULT BLOCK OPERATED lamp will go out in about 10-15 seconds indicating the accessory hasreset.

IfFAULTBLOCKOPERATEDlampdoesnotgoout,the trouble is most likely in the Trip-Reset board(assumingtheprevioustestshadpassed).

35

S260-75-1!

SAFETYFOR LIFE

Inrush RestraintTheinrush-restraintfeaturepreventsinrushcurrentsabovetheminimumactuatinglevelfromactuatingtheaccessory.Thisisaccomplishedbyraisingthephaseactuatinglevelbysomemultipleforapredeterminedtimeafterserviceisrestored.Groundactuating leveldetection isblocked forthedurationoftheraisedphaseactuatinglevel.Proceedasfollows:

�.Disable the ground sensing circuit by shorting thegroundfaultresistor(Figure26).

2.Set the inrush-restraining multiplier on the phaseactuatingcardandtheraisedfault-leveldurationonthetimertothevaluesatwhichtheyaretobechecked.

3.With the preferred source high-voltage switch (HV1)closed,closetestswitchSW1andraisetheequivalenttestcurrenttoavalueabovethemaximumactuatinglevelforthesetting,butbelowthemultipliedsetting.(SeeTable7formaximumcurrenttestvalues.)

4.Withoutdisturbingthiscurrentsetting,openSW1.5.Close test circuit switches SW2 and SW3 to apply

voltagetothecontrol.6.Momentarily closeandopenSW1before the raised

durationtimerrunsout,tosimulateaninrushcurrent. TheFAULTBLOCKOPERATEDlampwillnotlight. IftheFAULTBLOCKOPERATEDlampdoeslight, proceedasfollows:

A.Recheckcurrentcalculations. (Testcurrentshouldexceed actuation level but be less than inrushlevel.)

B.Check if momentary faults were applied beforetimerelapsed.

C.CheckiftimingrelaypickedupaftereitherHV1orHV2 was closed. Check presence or absence of120VacatAccessoryTieBoardterminal17whenHV1operatesandterminal28whenHV2operates.

D.Checkfortroubleindelayrelaycontactsorresistorboard.

7.CloseSW1andleaveclosedtosimulateapermanentfaultontheloadside.

TheFAULTBLOCKOPERATEDlampwilllightaftertheraiseddurationtimerrunsout. IfFAULTBLOCKOPERATEDlampdoesnotlight,the problemsaresimilartostep6above.8.OpenswitchesSW2andSW3toremovevoltagefrom

theaccessory.9.Raisethetestcurrenttoavaluejustabovetheraised

multiplevalue.�0.Withoutdisturbingthiscurrentsetting,openSW1.��.AgaincloseswitchesSW2andSW3toapplyvoltage

tothecontrol.�2.CloseSW1tosimulateahigh-levelfaultontheload

sideoftheswitch. The FAULT BLOCK OPERATED lamp will light immediatelyindicatingthefaultisgreaterthanthe inrushcurrentrestrainingsetting.

IfFAULTBLOCKOPERATEDlampdoesnotlight immediately,then A.Recalculateexpectedcurrent. B.Verifythatjumperonresistorboardisoncorrect

tab. If FAULT BLOCK OPERATED lamp still does

not light immediately, the resistor board may bedefective. Contact your Cooper Power Systemsrepresentative.

�3.Removetheshortingjumperfromthegroundfaultactuatingcartridgeuponcompletionofthetest.

Figure 26. Disabling phase sensing.

“BLOCK”TAB

“L”TAB



CAUTION: Equipment misoperation. Source I andSourceIIhighvoltageswitchescanbeparalleledinthemanualoperationmodeevenifSOURCEPREFERENCEswitch,S4,issetforNP(non-paralleloperation).Makesure both sources are in synchronism if a manualparalleloperationistobeperformed.Failuretocomplycan result in misoperation (unintended operation) andequipmentdamage. T304.0

�.The control must be programmed with all thenecessary operating settings and verified by theappropriate personnel prior to operation withenergizedswitchgear.

2.Verify status of high voltage switches according tosystemrequirements.

3.Reconnectcablesandgroundthecontrol.4.ApplySourceIandSourceIIvoltagetothecontrol.

020083KM

Return the Control to Service


36

DI

G17 II 14 25 24 15

11 L6 L5 L4 L3

L6L5

12 1

1 10

9

4 3

2 1

1 21 2

1 21 2

1 21 2

1 21 2

3 4

1 2

3 4

TM2

TM1

S1S2

S3 5 6 7 8

9 10 11 12

1 2 3 4

T3

T1T2

S6L4

L3

L1L2

TB3

TB4

L71

3

5

2

4

6S7

S4S5

A

A

6 36 3

5 41 2

4 14 1

5 2

5 2

6 3C6

54

32 1

A –

SUR

GE

PRO

TEC

TOR

CIR

CU

IT B

OAR

DD

– D

IOD

ES C

IRC

UIT

BO

ARD

R –

REL

AY T

IE B

OAR

DTB

1 –

TRAN

SFER

SW

ITC

H O

PER

ATO

RS

TER

MIN

AL B

LOC

KTB

2 –

POTE

NTI

AL S

ENSI

NG

TR

ANSF

OR

MER

S TE

RM

INAL

BLO

CK

TB3

– IN

TER

MED

IATE

TER

MIN

AL S

TRIP

TB4

– IN

TER

MED

IATE

TER

MIN

AL S

TRIP

TM1

– PR

EFER

RED

TO

ALT

ERN

ATE

TIM

ERTM

2 –

ALTE

RN

ATE

TO P

REF

ERR

ED T

IMER

T1-T

2-T3

– L

ATC

H R

ELAY

STA

TUS

TEST

JAC

KSFU

– P

HAS

E FU

SES

S1 –

MAN

UAL

OPE

R –

SO

UR

CE

I SW

ITC

HS2

– M

ANU

AL O

PER

– S

OU

RC

E II

SWIT

CH

S3 –

OPE

RAT

ION

SEL

ECTO

R S

WIT

CH

S4 –

SO

UR

CE

PREF

EREN

CE

–

RET

UR

N M

OD

E SW

ITC

HS5

– C

ON

TRO

L M

OD

E SW

ITC

HS6

– L

AMP

TEST

SW

ITC

HL1

– S

OU

RC

E I E

NER

GIZ

ED L

AMP

L2 –

SO

UR

CE

II EN

ERG

IZED

LAM

PL3

– S

WIT

CH

I –

OPE

N L

AMP

L4 –

SW

ITC

H I

– C

LOSE

D L

AMP

L5 –

SW

ITC

H II

– O

PEN

LAM

PL6

– S

WIT

CH

II –

CLO

SED

LAM

P

FAU

LT B

LOC

K AC

CES

SOR

YFB

– F

AULT

BLO

CK

TIE

BOAR

DTB

5 –

FAU

LT B

LOC

K TE

RM

INAL

BO

ARD

S7 –

RES

ET S

WIT

CH

L7 –

FAU

LT B

LOC

K O

PER

ATED

LAM

P

FUA

BC

XY

Z

FU–A

FU–B

FU–C

FU–X

FU–Y

FU–Z

12

12

12

12

12

12

TB1

TB2A

A

A B

C X

Y Z

11 15

G 14

1316

26 23

24 25

21

A B

C G

1 G2 X

Y Z

11 1

5 14

13

16 G

1 G2 2

6 23

24

25 2

1

17 1

8 IA

IB IC

IN IN

IX IY

IZ 2

7 28

TB5

FB

IA IB

IC IX

IY IZ

G D

IN

W U

S P

M 1

7 28

V T

R N

L

J1J2

J4J3

RB C A G J P D 4 11 M K 5 W

X Y Z

FN F

P FR

31

32 4

4 43

41

I 42

33

34

FG F

S FT

12

II R

R1

L L1

35 2

2 45

8 7

6 5

2 1

8

7

3 4

5

6

2 1

8

7

3 4

5

6

Figure 27.Location of circuit components wiring terminal identification.

WIRING TABLESTables21through40identifythepoint-to-pointwiringbetweencircuitcomponents.

Tables36–40applytoSControlswiththeFaultBlockAccessory.

ThephysicallocationofthecircuitcomponentsandtheirterminalsidentificationareshowninFigure27.

37

S260-75-1!

SAFETYFOR LIFE

TB� Output Terminal Block From To Color TB1-G2 WHT G1 Screwon WHT BackPanel G2 TB1-G1 WHT TB2-G2 WHT R-1 BLK 11 TB1-21 BLK A-11 BRN S1-3 BLK 13 A-13 YEL R-47 BLK 14 S4(F-C) RED A-14 ORG R-FR BLU 15 D-15 BLU A-15 RED 16 S3-2 YEL A-16 GRN 21 TB1-11 BLK A-21 BLK 23 S2-3 WHT A-23 VIO 24 S4(E-C) BRN A-24 GRY R-FT GRN 25 A-25 WHT D-25 GRN 26 S3-3 ORG A-26 BLU

TB3 Terminal Strip From To Color 1 TM2-8 MotorLead S6-4 YEL 2 TM2-7 MotorLead S4(K-8) WHT 3 TM1-7 MotorLead S4(J-4) GRY 4 TM1-8 MotorLead S6-4 GRN

TABLE 8

“A” Surge Protector Circuit Board

From To Color A FU-A-1 BRN B FU-B-1 ORG C FU-C-1 GRN G Studon WHT Cabinet X FU-X-1 VIO Y FU-Y-1 WHT Z FU-Z-1 BRN/WHT 11 TB1-11 BRN 13 TB1-13 YEL 14 TB1-14 ORG RA(B-7)* ORG 15 TB1-15 RED 16 TB1-16 GRN 21 TB1-21 BLK 23 TB1-23 VIO 24 TB1-24 GRY RA(A-7)* GRY 25 TB1-25 WHT 26 TB1-26 BLU

TABLE 9

“D” Diodes Circuit Board From To Color I S6-1 RED II S6-10 BRN G S6-7 BRN L3 L3-2 BRN L4 L4-2 RED L5 L5-2 ORG L6 L6-2 YEL L7 TB4-1 ORG 11 S6-5 RED 14 S4(F-C) YEL 15 TB1-15 BLU 24 S4(E-C) GRN 25 TB1-25 GRN

TABLE �0 TABLE �2

TB2 Input Terminal Block From To Color A FU-A-1 RED B FU-B-1 YEL C FU-C-1 BLU G1 C-2 WHT TB2-G2 WHT G2 TB1-G2 WHT TB2-G1 WHT X FU-X-1 GRY Y FU-Y-1 BLK Z FU-Z-1 RED/WHT

TABLE ��

TB4 Terminal Strip From To Color D-L7 ORG 1 R-FN GRN L7-1* BRN T3 BRN 2 L7-2* RED S3-8* ORG 3 S1-2 BRN S7-1* BRN 4 R-FG YEL S7-2* RED

TABLE �3

FU-B Source I – Phase B Fuse From To Color 1 A-B ORG TB2-B YEL 2 R-B RED

TABLE �5

FU-C Source I – Phase C Fuse From To Color 1 A-C GRN TB2-C BLU 2 R-C ORG

TABLE �6

* Fault Block Accessory Connections

FU-A Source I – Phase A Fuse From To Color 1 A-A BRN TB2-A RED 2 R-A BRN

TABLE �4


38

TABLE �7 TABLE 22

“R” Relay Tie Board From To Color A FU-A-2 BRN B FU-B-2 RED TB-5-18* BRN C FU-C-2 ORG D S4(B-8) ORG TB2(G-1) WHT G T-3 ORG FB-L* RED J S4(F-12) GRY K S4(D-8) BLU L TM1-3 RED L1 S1-4 BLU M S4(D-12) RED P S4(B-12) YEL R TM1-6 YEL R1 S2-4 VIO W S4(E-2) VIO X FU-X-2 YEL Y FU-Y-2 GRN TB5-27* RED Z FU-Z-2 BLU FG TB4-4 YEL FB-G* BRN FN TB4-1 GRN FB-N* YEL S4(A-C) BRN FP R-FR** BLK FB-P* GRN TB1-15 BLU FR R-FP** BLK FB-R BLU S4(C-C) GRN FS R-FT** BLK FB-S* VIO TB1-25 GRN FT R-FS** BLK FB-T* GRY J1 J2 Usedwithcapacitor J3 voltagesensingaccessory J4 I S6-3 BRN/WHT II S6-12 GRY 4 S5-3 RED 5 S5-6 BRN S3-5 RED 11 TB1-11 BLK FB-M* ORG 12 L3-1 VIO 22 S3-1 BRN 31 S4(G-6) BLK 32 S4(G-2) WHT 33 TM1-5 ORG 34 S4(J-C) ORG 35 S4(L-C) GRN 41 S4(H-8) BRN/WHT 42 S4(H-12) RED/WHT 43 TM1-2 BRN 44 S4(K-C) YEL 45 S4(M-C) BLU 47 TB1-13 BLK 48 S4(C-6) GRY

FU-X Source II – Phase X Fuse From To Color 1 A-X VIO TB2-X GRY 2 R-X YEL

TABLE �8

FU-Y Source II – Phase Y Fuse From To Color 1 A-Y WHT TB2-Y BLK 2 R-Y GRN

TABLE �9

FU-Z Source II – Phase Z Fuse From To Color 1 A-Z BRN/WHT TB2-Z RED/WHT 2 R-Z BLU

TABLE 20

TM� PREFERRED TO ALTERNATE TIMER From To Color 1 R-33 ORG TM2-6 ORG 2 TB3-4 BLK 3 R-R YEL TM2-8 YEL 4 – – 5 – – R-43 BRN 6 TM2-1 BRN S7-8* BLU 7 TB3-3 BLK TB2-3 RED 8 R-L RED S7-7* GRN

TABLE 2�

TM2 ALTERNATE TO PREFERRED TIMER From To Color 1 TM1–6 BRN 2 TB3-1 BLK 3 TM1-8 RED 4 – – 5 – – 6 TM1-1 ORG S7-4* ORG 7 TB3-2 BLK 8 TM1-3 YEL S7-5* YEL


* Fault Block Accessory Connections* Fault Block Accessory Connections** Omit jumpers if fault block included.

TABLE 23

S5 CONTROL MODE Switch From To Color 1 S4(L-6) RED 2 S4(M-8) GRN 3 R-4 RED 4 T-2 ORG 5 T-1 RED 6 R-5 BRN

TABLE 24

S6 LAMP TEST Switch From To Color 1 D-I RED 2 L1-1 BRN 3 R-I BRN/WHT T-3 ORG 4 TB3-4 GRN TB3-1 YEL 5 D-11 RED 6 – – 7 D-G BRN 8 SW3-5 BLU 9 – – 10 D-II BRN 11 L2-1 RED 12 R-II GRY

TABLE 25

L� SOURCE I ENERGIZED Lamp From To Color 1 S6-2 BRN 2 L2-2 ORG

TABLE 26

L2 SOURCE II ENERGIZED Lamp From To Color 1 R-II GRY 2 L1-2 ORG T3 YEL

TABLE 27

L3 SWITCH I OPEN Lamp From To Color 1 R-12 VIO L4-1 VIO 2 D-L3 BRN

TABLE 28

L4 SWITCH I CLOSED Lamp From To Color 1 L5-1 VIO L3-1 VIO 2 D-L4 RED

39

S260-75-1!

SAFETYFOR LIFE

TABLE 29

S4 SOURCE PREFERENCE & RETURN MODE Switch From To Color From To Color A-C R-FP BRN G-4 R-32 WHT S1-1 BRN G-5 R-31 BLK A-2 R-38 VIO G-6 A-3 H-C S3-5 VIO A-4 S4(G-C) Bare A-5 H-8 R-41 BRN/WHT A-6 H-9 B-C S1-3 ORG H-10 B-8 H-11 R-42 RED/WHT B-9 R-D ORG H-12 B-10 J-C R-34 ORG B-11 J-2 S4(K-12) Bare B-12 R-P YEL J-3 C-C R-FS GRN J-4 S4(K-12) Bare S2-1 YEL TB3-3 GRY C-2 J-5 S4(K-10) Bare C-3 J-6 C-4 K-C R-44 YEL C-5 K-8 TB3-2 WHT C-6 R-48 GRY K-9 D-C S2-3 BLU K-10 S4(J-6) Bare D-8 R-K BLU K-11 S4(J-2) Bare D-9 K-12 D-10 R-M RED L-C R-35 GRN D-11 L-2 – – D-12 L-3 – – E-C D-24 GRN L-4 TB1-24 BRN L-5 S5-1 RED E-2 R-W VIO L-6 F-C D-14 YEL M-C R-45 BLU TB1-14 RED T-2 BRN F-12 R-J GRY M-8 G-C S4(H-C) Bare M-9 S5-2 GRN G-2 R-32 WHT M-10 G-3

L5 SWITCH II OPEN Lamp From To Color 1 L6-1 VIO L4-1 VIO 2 D-L5 ORG

TABLE 30

L6 SWITCH II CLOSED Lamp From To Color 1 L5-1 VIO 2 D-L6 YEL

TABLE 3�

S� MANUAL OPER. SOURCE I Switch From To Color 1 S3-7 VIO S4(A-C) BRN S2-2 RED 2 TB4-3 BRN S1-5 Bare 3 TB1-13 BLK S4(B-C) ORG 4 R-L1 BLU S2-6 YEL 5 S1-2 Bare 6 S2-4 YEL

TABLE 32

T�-T2-T3 LATCH RELAY STATUS TEST Terminal From To Color T1 S4(L-C) RED S5-5 RED T2 S4(M-C) BRN S5-4 ORG L2-2 YEL T3 S6-4 ORG TB4-2 BRN R-G ORG

TABLE 33


40

“FB” Fault Block Accessory Tie Board From To Color IA TB5-IA BRN IB TB5-IB RED IC TB5-IC ORG IX TB5-IX YEL IY TB5-IY GRN IZ TB5-IZ BLU G R-FG BRN D S3-12 BLK IN TB5-IN VIO W – – U – – S R-FS VIO P R-FP GRN M R-11 ORG RA(A-2) BLK 17 TB5-17 GRY 28 TB5-28 WHT V – – T R-FT GRY R R-FR BLU N R-FN YEL L R-G RED

S2 MANUAL OPER. SOURCE II Switch From To Color 1 S4(C-C) YEL S3-6 BLU S1-2 RED 2 S2-5 Bare S3-9 GRN 3 TB1-23 WHT S4(D-C) BLU 4 R-R1 VIO S1-6 YEL 5 S2-2 Bare 6 S1-4 YEL

TABLE 38

“TB5” Fault Block Accessory Terminal Block From To Color 17 FB-17 GRY RA(A-1) GRN 18 R-B BRN RA(A-6) BRN IA FB-IA BRN IB FB-IB RED IC FB-IC ORG IN1 FB-IN VIO IN2 BLK IN2 IN1 BLK IX FB-IX YEL IY FB-IY GRN IZ FB-IZ BLU 27 R-Y RED RA(B-6) RED 28 FB-28 WHT RA(B-1) WHT

TABLE 36TABLE 34

S7 Fault Block RESET Switch From To Color 1 TB4-3 BRN 2 TB4-4 RED 4 TM2-6 ORG 5 TM2-8 YEL 7 TM1-8 GRN 8 TM1-6 BLU

TABLE 39

S3 OPERATION SELECTOR SWITCH From To Color 1 R-22 BRN 2 TB1-16 YEL 3 TB1-26 ORG 4 – – R-11 RED 5 S4(H-C) VIO S6-8 BLU 6 S2-1 BLU 7 S1-1 VIO 8 TB4-2* ORG 9 S2-2 GRN 10 – – 11 – – 12 FB-D* BLK

TABLE 35


L7 FAULT BLOCK OPERATED From To Color 1 TB4-1 BRN 2 TB4-2 RED

TABLE 37

“RA” Fault Block Accessory Relay From To Color A1 TB5-17 GRN A2 FB-M BLK A6 TB5-18 BRN A7 A-24 GRY B1 TB5-28 WHT B6 TB5-27 RED B7 A-14 ORG

TABLE 40

Parts listed and illustrated include only those partsand assemblies usually furnished for repair. Becauseof the ease, faster receipt, and greater economy oflocal acquisition, thewiring,wireend terminations, andcommon hardware parts are not included in thereplacementpartslisting.

REPLACEMENT PARTSTo assure correct receipt of any parts order, alwaysinclude the control type and serial number. Because ofCooperPowerSystems’continuousimprovementpolicy,there may be instances where parts furnished may notlookexactlythesameasthepartsordered.

However,theywillbecompletelyinterchangeablewithoutanyreworkofthecontrol.Allpartscarrythesamewarrantyastheoriginalcontrol,i.e.,againstfailureduetodefectsinmaterialorworkmanshipwithinoneyearfromdateofshipment.

4�

S260-75-1!

SAFETYFOR LIFE

12

11

13

14

1,2,3,6

15

16,17

18,19,20

20,21

1,2,3,51,2,3,481081,2,3,51,2,3,4

9

11

14

1,2,3,6

1,2,3,7

22

23

020076KM

Index Catalog No. Description Number Qty.1 Lampsocket KP2361A1 62 Socketfastener KP2005A10 63 Lamp KP2276A3 64 Lens,red(L4,L6) KP2277A2 25 Lens,green(L3,L5) KP2277A5 26 Lens,clear(L1,L2) KP2277A3 27 Lens,amber(L7) KP2277A4 18 Terminalpost,black(T1,T2) KP2081A2 29 Terminalpost,white(T3) KP2081A1 110 Toggleswitch,4PST(S6) KP2124A26 111 Digitaltimer

(TM1,TM2) 0.01sec.to99.9hrs.range KP2159A2 2

Front Panel Replacement Parts List

Index Catalog No. Description Number Qty.

12 Diodecircuitboardassembly KCN120SA 1 13 Toggleswitch,4PDT(S3) KP2124A16 1 14 Toggleswitch,DPDT(S1,S2) KP2124A6 2 15 Intermediateterminalstrip (TB3,TB4) KP432ME 2 16 Rotaryselectorswitch(S4) KCN199S 1 17 Switchknob KCN149S1 1 18 Knoblock KP107RS 1 19 Lockbacking KP497ME 1 20 Selftappingscrew, 6-32x1/2,stl K751515106050A 2

21 Spacer KP3004A59 1 22 Toggleswitch,DPDT(35) KP2124A21 1 23 Toggleswitch,3PST(S7) KP2124A43 1

Figure 28. Front panel – replacement parts identification.


42

2,6

3,6

3,6

4,62,62,67

2,6

4,6

4,6

1,5

8

9

10

11,12

020080KM

Figure 29. Back panel – replacement parts identification.

Index Catalog No. Description Number Qty.

1 Relay(R1) KCN104S4 1 2 Relay(R8,R9,R10,R11) KCN104S2 6 3 Relay(R4,R5) KCN104S3 2 4 Relay(R2,R6,R7) KCN104S1 1 5 Relayretainer K999904310339A 1 6 Relayretainer K999904310339A 9 7 Relaytieboardsubassembly KCN203S900 1 8 Surgeprotectorboardassembly KNOVA322-1 1 9 Terminalblock(TB2)(Consists ofthefollowingcomponents) Terminalsection KP999904150097A 12 Endpiece KP999904150064A 1 Markerstrip KP2076A50 1 10 Terminalblock(TB1)(Consists ofthefollowingcomponents) Terminalsection KP999904150097A 16 Endpiece KP999904150064A 1 Markerstrip KP2076A50 1 11 Fuseholder KP124S 6 12 Fuse KP125S 6

Back Panel Replacement Parts List

43

S260-75-1!

SAFETYFOR LIFE

2

7

8

9

1

121311645

14

15

10

3

020081KMFigure 30. Fault block accessory – replacement parts identification.

Fault Block Accessory Replacement Parts ListIndex Catalog No. Description Number Qty.

1 Relayretainerbar KCN144S1 1 2 Circuitboardretainerbar KCN141S1 1 3 Wingnut,10-32,stl K881215332010Z 1 4 Elasticstopnut KP2020A1 1 5 Phaseactuatingcurrentcircuit KCN116S___ 1 board(addpropercurrentvalueto completecatalognumber:80,112,160, 224,320,448,640) 6 Groundactuatingcurrentresistor KCN142S___ 1 (addpropercurrentvaluetocomplete catalognumber:10,14,20,28,40,56,80, 112,160,224,320,448) 7 Diodeboard KCN114SA 1 8 Trip-resetboard KCN112SA 1 9 Relay(RY1) KP978ME 1 10 Time-delayrelay(RY2) K999904310339A 1 11 Transformer KA234ME 1 12 Zenerdiode KP4011A12 1 13 Tieboard KCN110SA 1 14 Terminalblock(TB5)(Consistsofthe 1 followingcomponents) Terminalsection KP999904150097A 16 Endpiece KP999904150064A 1 Markerstrip KP2076A50 1 15 Barrier KCN167S1 1

2300 Badger DriveWaukesha, WI 53188www.cooperpower.com


KA2048-291 Rev: 03

© 2008 Cooper US, Inc. All Rights Reserved.All Cooper logos, Cooper Power Systems, and Kyle are valuable trademarks of Cooper US, Inc. in the U.S. and other countries. You are not permitted to use the Cooper Trademarks without the prior written consent of Cooper US, Inc.

Documents

Oil- and Vacuum-Break Switches - Cooper Industries