Generac Power Systems CTTS Series User manual

1 of 2
Automatic Transfer Switches
100 - 400 Amps,
600 VAC
100 - 400 Amps, 600 VAC
Closed Transition Transfer Switch (CTTS)
Standard Features
•Independent operators for each source, electrically operated
and mechanically held
•Digitaldisplay,programmableexerciser
•SPDTauxiliarycontactsoneachsideofswitch
 (wiredtoterminalstrip)
•Maincontactsaresilverplatedorsilveralloytoresist
 weldingandsticking
•Conformalcoatingprotectsallprintedcircuitboards
•Indicatinglightsforenabledsources—Normal,Emergency
•NEMA1enclosurewithhingeddoorandkey-lockinghandle
•Three-positionswitch—FastTest,Auto,NormalTest
• Separate,redundantcircuitrytomonitorandprevent
extended paralleling of the two sources.
• FailuretosynchronizeandATSlockedoutindicatinglamps.
• Maximumsourceinterconnectiontime=100milliseconds
during closed transition operation.
• Controlswitcheslocatedonthefrontofthedoorforeaseof
operation.
• CTTSisUL1008listedandCSAcertified.
• Electrically-operated,mechanically-heldcontactsforfast,
positiveconnections.
• Ratedforallclassesofload,100%equipmentrated,both
inductiveandresistivewithnoderations.
• 3and4Pole600VACcontactors.
TheGeneracclosedtransitiontransferswitch(CTTS)offersaneffectivesolutionfortheproblemofmomentarylossofpowerduring
transfer.
TheGeneracCTTSwilleliminatemomentarypowerinteruption,whenbothsourcesarepresentandsynchronized,bytransferring
theloadswithanoverlappingcontactarrangement.
Optional Accessories
NEMA12dustproofenclosure•
NEMA3Rrainproofenclosure•
NEMA4and4XEnclosure•
4-polecontactorforneutralisolation•
ExteriorACmeterpackage•
AdditionalSetsofauxiliarycontacts(eachside)•
Signalbeforetransfer•
Remoteautocontrol•
Manualbypassforreturntonormal•
Preferredsourceselectorswitch•

2 of 2
GeneracPowerSystems,Inc.•S45W29290HWY.59,Waukesha,WI53189•generac.com
©2010GeneracPowerSystems,Inc.Allrightsreserved.Allspecificationsaresubjecttochangewithoutnotice.Bulletin0164210SBY-A/PrintedinU.S.A.01/06/11
100 - 400 Amps, 600 VAC
TerminalLugWireRanges
WithstandCurrent-600VoltCTTSSeries
MechanicalDimensions(NEMA1,Standard)
CTTSControlSystems
LOGIC CONTROL w / Inphase Monitor
UtilityVoltage
Dropout(%ofpickup)............................................................................................75-95%(Adj.)
Pickup....................................................................................................................85-95%(Adj.)
LineInterrupt......................................................................................................0.1-10Sec.(Adj.)
EngineMinimumRun......................................................................................................... 5-30Min.(Adj.)
EngineWarmup............................................................................................................... 5Sec.-3Min.(Adj.)
ReturntoUtility.................................................................................................................. 1-30Min.(Adj.)
EngineCooldown............................................................................................................... 1-30Min.(Adj.)
StandbyVoltage...................................................................................................................85-95%(Adj.)
StandbyFrequency..............................................................................................................80-90%(Adj.)
TimeDelayNeutral...........................................................................................................0.1-10Sec.(Adj.)
TransferonExercise............................................................................................................On/OffSwitch
WarmupTimerBypass.........................................................................................................On/OffSwitch
TimeDelayNeutralWhenFailtoSyng.................................................................................On/OffSwitch
GTSRatedAmps 100 150 200 300 400
FuseProtected
 MaximumRMSSymmetrical
 WithstandCurrent 200,000 200,000 200,000 200,000 200,000
ProtectiveDeviceContinuous
 Rating(Max)Amp 200 400 400 600 600
Fuse Class J,T J,T J,T J,T J,T
CircuitBreakerProtected
 MaximumRMSSymmetrical
 WithstandCurrent 14,000 25,000 25,000 35,000 35,000
ProtectiveDeviceContinuous
 Rating(Max)Amp 150 300 300 600 600
*TestedperUL1008andCSAStandards
*Currentratingsarelisted@480VAC
Current Height Width Depth Weight
Rating H1 H2 W1 W2  (lbs.)
100 36.8 37.5 18 24.8 10 180
150 48.8 49.5 24 30.75 12 265
200 48.8 49.5 24 30.75 12 265
300 48.8 49.5 24 30.75 12 325
400 48.8 49.5 24 30.75 12 325
GTSRatedAmps SwitchTerminal NeutralBar  GroundLug
100 1X-2/0-14 4X-2/0-14  1X-2/0-14
150 1X-400MCM-4 4X-350MCM-6  1X-350MCM-6
200 1X-400MCM-4 4X-350MCM-6  1X-350MCM-6
300 2X-250MCM-1/0or1X-600MCM-4 8X-250MCM-1/0or4X-600MCM-4 1X-350MCM-6
400 2X-250MCM-1/0or1X-600MCM-4 8X-250MCM-1/0or4X-600MCM-4 1X-350MCM-6