Model: RXT - Kohler Co.

1 G11-140 (Model RXT Automatic transfer switch ) 3/20g Page 1 Automatic transfer Switch100-400 AmpsModel:RXTM odel RXT Automatic transfer SwitchThe Model RXT automatic transfer switch is designed for useonly with Kohlerrgenerator sets equipped with RDC2 or DC2generator set/ transfer switch controls. The transfer switchoperation is controlled by the RDC2/DC2 FeaturesDAllows utility voltage display on the RDC2/DC2 generatorset/ transfer switch controller, available exclusively on Kohlerrresidential and light commercial generator setsDUL listeddUL 1008 listed, file #E58962dModels with load centers use UL 67 listed componentsDCSA certification, file #LR58301, is available for:dStandard ATS without load center (single and three-phase)dService entrance ATS 100 and 200 amp modelsDCorrosion-resistant NEMA 3R aluminum enclosuredPadlockabledApproved for indoor or outdoor installationdANSI 49 grayDNEMA 1 enclosure available on 100 amp load center modelsDContactor electrically and mechanically interlockedDDouble throw inherently interlocked designDContactor manually operable for maintenance purposesDSilver alloy main contactsDTransfer switches are 100% equipment rated and can beapplied at the rated current without derating (non-serviceentrance models)DService entrance models include disconnect circuit breakeron the utility (normal) source side (80% rated)

2 DFive-year limited warrantyStandard Interface BoardDStandard interface board connects to the Model RDC2 orDC2 generator set/ transfer switch a load control contact that provides a 5 minute timedelay for startup of selected loads after transfer to theemergency source. Use for large motor Interface/LoadManagement BoardDOptional combined interface/load management boardreplaces the standard interface board and connects to theModel RDC2 or DC2 generator set/ transfer switch combined board is available on single-phase standardand service entrance models.(Not available on 3-phase or load center models.)DThe combined board automatically manages up to sixresidential loads:dUp to four customer-supplied power relay modules canbe connected for management of non-essentialsecondary HVAC relays are included for control of twoindependent air conditioner have been removed for ModelsD100, 200, and 400 amp standard and serviceentrance models are and 300 amp service entrance models are interface/load management board isavailable on single-phase standard and serviceentrance models.

3 (Not available on 3-phase or loadcenter models.)D100 amp standard single-phase models are availablewith or without a 16-space load center. Up to 8tandem breakers can be used for a total of standard single phase model with a12-space load center and a NEMA 1 enclosure isavailable as a standalone non-configurable spec(GM85273-SA_).DSee page 7 for more (Model RXT Automatic transfer switch ) 3/20g Page 2 SpecificationsStandard Interface BoardController interface connectionsAandB#20 AWG shielded twisted-pairBelden 9402 or 8762 or equivalentController interface connectionsPWR and COM#12- 20 AWG(see ATS Installation Manual)Load control contact rating10 A @ 250 VACLoad control connections#12- 18 AWGNote:For combined interface/load management boardspecifications, see page SpecificationsOperating temperature 20_Cto70_C( 4_F to 158_F)Storage temperature 40_Cto85_C( 40_F to 185_F)Humidity5 to 95% noncondensingCodes and StandardsThe ATS meets or exceeds the requirements of the followingspecifications.

4 DUnderwriters Laboratories UL 1008, Standard for AutomaticTransfer Switches for Use in Emergency Systems, file#E58962 DUnderwriters Laboratories UL 508, Standard for IndustrialControl EquipmentDCSA certification available, file #LR58301 (not available for150, 300, or 400 amp service entrance or 100 amp loadcenter models). Must be selected when the transfer switchis 70, National Electrical CodeDNFPA 110, Emergency and Standby Power SystemsDNEMA Standard IC10- 1993, AC Automatic TransferSwitchesCable SizesAL/CU UL-Listed Solderless Screw-Type Terminals for External Power ConnectionsSwitchSize,AmpsSwitchPhasesRa nge of Wire Sizes, Cu/AlNormal and EmergencyLoadNeutralGround100 Standard1(1) #14 - 1/0 AWG(1) #14 1/0 AWG(5)#12to250 KCMIL(Cu)or(5) #10 to 250 KCMIL (Al)(9) #6 #14 AWG(4) #14 - 1/0 AWG12- or 16-space loadcenter(NEMA 1)1(1) #14 1/0 AWGper customer-suppliedcircuit breaker(26) #4 - 14 AWG or(2) #14 - 1/0 AWG or(1) #6 2/0 AWG16-spaceload center(NEMA 3R)1(1) #14 1/0 AWGper customer-suppliedcircuit breaker(26) #4 - 14 AWG or(2) #14 - 1/0 AWG or(1) 2/0 AWGS erviceEntrance1 Normal: (1) #12 2/0 AWGE merg.

5 (1) #14 1/0 AWG(1) #14 1/0 AWG(5)#12to250 KCMIL(Cu)or(5) #10 to 250 KCMIL (Al)(4) #14 1/0 AWG(9) #14 - #6 AWG3-Phase3(1) #14 1/0 AWG(1) #14 1/0 AWG(3)#4 AWG 600 KCMIL(6) 1/0 AWG 250 KCMIL150200 ServiceEntrance1 Normal: (1) #4 300 KCMILE merg: (1) #6 - 250 KCMIL(1) #6 250 KCMIL(5)#12to250 KCMIL(Cu)or(5) #10 to 250 KCMIL (Al)200 Standard1(1) #6 AWG 250 KCMIL(1) #6 250 KCMIL(5)#12to250 KCMIL(Cu)or(5) #10 to 250 KCMIL (Al)(9)#14 #4 AWG(4) #14 - 1/0 AWG3-Phase3300400 ServiceEntrance1 Normal: : (1) #1 - 600 KCMILor (2) #1 250 KCMILE merg: (2) #6 - 250 KCMIL(2) #6 250 KCMIL(3)#4 AWG 600 KCMIL(6) 1/0 AWG 250 KCMIL(6) #6 3/0 AWG400 Standard1(2) #6 250 KCMIL(2) #6 250 KCMIL(3)#4 AWG 600 KCMIL(6) 1/0 AWG 250 KCMIL(6) #6 3/0 AWG3-pole208-240 V33or4pole480 V3(1) #4 600 KCMIL(2) 1/0 250 KCMIL(1) #4 600 KCMIL(2) 1/0 250 KCMILNote:Data is subject to change. Refer to the transfer switch dimension drawings and wiring diagrams for planning and (Model RXT Automatic transfer switch ) 3/20g Page 3 Optional Combined Interface/Load Management BoardThe RXT transfer switch is available with either a standardinterface board or a combined interface/load managementboard.

6 The combined board allows load management asdescribed ManagementDThe combined load management board disconnectsnon-critical loads to prevent generator overload, incompliance with combined load management board monitors generatorcurrent and frequency to determine when to add or shedloads. This monitoring prevents frequency drops that candamage valuable electronics like computers and management allows the use of a smaller generator are automatically added or shed based on load control system uses dynamic logic to preventshedding important loads unnecessarily when airconditioning, refrigerator, or water pump motors start(patent pending).DThe load management board and generator communicate toprovide smart power management. The time to shed loadsdecreases as each load is shed to quickly adapt to criticalpower shed power level and frequency setpoints can beadjusted using a personal computer (laptop) and KohlerrSiteTechtsoftware, which is only available to Kohler -authorized distributors and SettingDLoads are added and shed according to their priority.

7 Load 1is the top priority, which is added first and shed last. Load 6is the lowest critical loads can be turned off automatically whenessential appliances are priorities are hard-wired at Load Shed Outputs with OnCuerPlusDUse Kohler s OnCuerPlus Generator Management System(sold separately) to view load status (On or Off) for loadsconnected to the load shed OnCuerPlus to remotely monitor when loads are shedor load shed outputs can be labeled in TransformerDThe combined load management board option includes a400 amp current transfomer (CT) for load larger diameter CT is available for applications that requirelarger 500 amp CT is available for use with a 60 RCL the table below for current transformer specificationsand optional kit Shed SpecificationsConnectionRatingConnection Pilot Relays*125 VAC, 10 A total (general purpose)120 VAC, 125VA (pilot duty)#12- 20 AWGHVAC Relays (qty. 2)125 VAC, 10 A (general purpose)120 VAC, 125VA (pilot duty)#12- 20 AWGRBUS Communication and PowerConnections to the RDC2 A @ 12 VDCUse Belden #9402 or equivalent 20 AWGshielded, twisted-pair communicationscable[* Four (4) pilot relays are provided for customer-supplied normally closed load-switching contactors/relays.]

8 The combination of four load relayoutputs cannot exceed 10 amps total current draw. Kohlerrpower relay modules are recommended.[For long distances, use an equivalent shielded, twisted-pair cable forRBUS connections and individual 12- 20 AWG wires (qty. 2) for Transformer SpecificationsRatio(Amps:VAC)Outer Diametermm (in.)Inner Diametermm (in.)Service PartNumberSales Kit Part NumberCT Availability400 ( ) ( )GM83929N/AIncluded with combinedboard400 ( ) ( )GM17250GM17250-KP1-QSSold Separately500 ( ) ( )GM60264GM17250-KP2-QSSold Separately(use with 60 RCL)G11-140 (Model RXT Automatic transfer switch ) 3/20g Page 4 Withstand and Close-On Ratings (WCR)Service Entrance transfer switch RatingsThe service entrance transfer switch is factory-equipped with a normal source disconnect circuit for the control of motors, electric discharge lamps, tungsten filament lamps and electric heating equipment where the sumof motor full-load ampere ratings and the ampere ratings of other loads do not exceed the ampere rating of the switch and thetungsten load does not exceed 30 percent of switch Rating, Amps *WCR, RMS Symmetrical Amps at 240 VAC100, 150, 20022,000300, 40035,000* Continuous load current not to exceed 80% of switch Ratings with Coordinated Circuit BreakersSingle-phase transfer switches are UL listed at 240 VAC maximum.]

9 Three-phase transfer switches are rated at 480 VACmaximum. The following table lists contactor withstand current ratings (WCR) for 100- 400 ampere non-service entrance ratedswitches with specific manufacturer s circuit breakers per UL and Canadian safety standards. Suitable for the control of motors,electric discharge lamps, tungsten filament lamps and electric heating equipment where the sum of motor full-load ampere ratingsand the ampere ratings of other loads do not exceed the ampere rating of the switch and the tungsten load does not exceed 30percent of switch transfer switch is rated for use on a circuit capable of delivering not more than the RMS symmetrical amperes maximum asshown in the tables below, but no greater than the interrupting capacity of the selected Ratings with Specific Manufacturer s Molded-Case Circuit BreakersSwitchRating,AmpsVoltage, Poles/PhasesWCR, RMSS ymmetricalAmpsManufacturerType or ClassMaximumSize, Amps1002402 pole/1 phase10,000 Any Breaker *Any Breaker ( seconds max.)

10 1502002402 pole/1 phase10,000 Any Breaker *Any Breaker ( seconds max.) 1002004803 pole/3phase4 pole/3phase30,000 EatonFCL100 JGS, JGH, JGC, JGU, JGX, JBD, JD, HJD, JDC,LCL, LCLA250 LDC, CLDC, KDB, KD, HKD, KDC, LD, CLD,HLD, CHLD400 ITE/SiemensCED6, HED4, HED6125 CFD6, FD6A, FXD6, HFD6, HFXD6, HHFD6,HHFXD6250 CJD6400 General ElectricSEL, SEP, THLC1, PE_E, PE_N, PE_H, PE_L150 THLC2225 SFH, SFL, SFP, PE_E, PE_N, PE_H, PE_L250 SGH, SGL, SGP, FGN, FGH, FGL, FGP, PG_E,PG_N, PG_H, PG_L, PG_P400 SchneiderHG, HJ, HL, HR150JJ, JL, JR250LG, LJ, LL, LR400* For higher WCR values, contact the factory for additional specific breaker (Model RXT Automatic transfer switch ) 3/20g Page 5 WCR Ratings with Specific Manufacturer s Molded-Case Circuit BreakersSwitchRating,AmpsVoltage, Poles/PhasesWCR, RMSS ymmetricalAmpsManufacturerType or ClassMaximumSize, Amps3004002402 pole/1 phase35,000 ABBT5, T6600 EatonCHKD, CKD, DK, HKD, KD, KDB, KDC,LA TRIPAC, LCL400 CHLD, CLD, CLDC, HLD, LD, LDB, LDC600 HMDL, MDL, NB TRI- PAC800 General ElectricFGH, FGL, FGN, FGP, SGHA600 SiemensCJD6, HHJD6, HHJXD6, HJD6, HJGA, HJXD6,JD6, JXD2, JXD6, SCJD6, SHJD6, SJD6, NJGA,LJGA400 CLD, HHLD, HHLXD, HLD, HLGA, HLXD, LD,LLGA,LXD,NLGA,SCLD,SHLD,SLD600 CMD, HLMD, HLMXD, HMD, HMG, HMXD, LMD,LMG, LMXD, MD, MXD, NMG, SCMD, SHMD,SMD800 Square DLA, LC, LE, LH, LI, LX, LXI400DG,DJ,DL,LC,LE,LI,LX,LXI600 Merlin GerinCJ400H, CJ400L, CJ400N400CJ600H, CJ600N6004002403 pole/3 phase4 pole/3 phase65,000 SchneiderLJ, LL, LR600 General ElectricSEL, SEP, PE_N, PE_H, PE_L150 SFL, SFP, PE_N, PE_H, PE_L250 SGL, SGP400 SGL, SGP, FGL.