Specification Bulletin 682-31 - S&C Electric Company

S&C Remote Supervisory Vista® Underground Distribution SwitchgearThe following items should be considered when applyingRemote Supervisory Vista UDS:Ungrounded systems. The S&C voltage sensors areconnected phase-to-ground, and are therefore not intendedfor use on ungrounded systems. Contact your nearestS&C Sales Office for information on applying RemoteSupervisory Vista UDS on ungrounded systems.Uni-Grounded and Resistance-Grounded Systems.Uni-grounded and resistance-grounded systems requirepower to be provided by a phase-to-phase connectedvoltage transformer. When the self-powered option (-Y4)is specified, the internal voltage transformer is connectedphase-to-ground. Therefore, power must be supplied by anexternal source if Remote Supervisory Vista UDS is to beapplied on a resistively grounded or uni-grounded system.Contact your nearest S&C Sales Office for information onapplying Remote Supervisory Vista UDS on ungroundedsystems.50/60-Hz ANSI RATINGS—IEC Ratings in Parentheses12kVAmperes, RMSFault InterrupterLoad-Interrupter SwitchSystemClassMaxBILMain BusCont.CurrentShort-Circuit,Sym.Cont., LoadDropping,and LoadSplitting3Ten-Time Duty-CycleFault-Closing, Sym.IntoClosedPositionIntoGroundedPositionTen-TimeDuty-CycleFault-Interr.,Sym.Cont., LoadDropping,and LoadSplitting3Ten-TimeDuty-CycleFault-Closing,Sym.4Mom. andOne-Second,Sym.15.5(12)15.5(15.5)95(95)600(630)f12 500(12 500)25 000(25 000)200(200)d600(630)l12 500(12 500)25 000(25 000)12 500(12 500)h12 500(12 500)25 000(25 000)600(630)a600(630)k16 000(16 000)h12 500(12 500)25 000(25 000)27(24)29(29)125(125)600(630)f12 500(12 500)25 000(25 000)200(200)d600(630)l12 500(12 500)25 000(25 000)12 500(12 500)h12 500(12 500)25 000(25 000)600(630)a600(630)k16 000(16 000)h12 500(12 500)25 000(25 000)38(36)38(38)150(150)600(630)f12 500(12 500)25 000(25 000)200(200)d600(630)l12 500(12 500)25 000(25 000)12 500(12 500)h12 500(12 500)25 000(25 000)600(630)a600(630)k16 000(16 000)h12 500(12 500)25 000(25 000)1 ANSI ratings have been assigned in accordance with the applicableportions of IEEE C37.71, C37.72, and C37.73. IEC Ratings have beenassigned in accordance with the applicable portions of IEC 265-1 for aClass A switch.2 Refer to the nearest S&C Sales Office for other possible ratings.3 Parallel or loop switching. Fault interrupters and load-interrupterswitches can switch the magnetizing current of transformers associatedwith the load-dropping rating. Unloaded cable switching rating:10 amperes at 15.5 kV, 20 amperes at 29 kV and 38 kV.4 Applicable to fault closing into closed or grounded position.f 1200 (1200) amperes when switchgear is furnished with optionalcopper bus, Catalog Number Suffix “-Z5.”d 600 (630) amperes when switchgear is furnished with optional600-ampere bushings at fault interrupter terminals, Catalog NumberSuffix “-M2” or “-M3.”l 900 (900) amperes when switchgear is furnished with optional900-ampere fault interrupters, Catalog Number Suffix “-Q1” through“-Q6,” plus optional copper bus, Catalog Number Suffix “-Z5.”h 25,000 (25,000) amperes symmetrical three-time duty-cycle faultclosingrating; 16,000 (16,000) amperes symmetrical ten-time duty-cyclefault-closing rating.a 200 (200) amperes when switchgear is furnished with optional200-ampere bushing wells at load-interrupter switch terminals, CatalogNumber Suffix “-M4.”k 900 (900) amperes when switchgear is furnished with optional900-ampere load-interrupter switches, Catalog Number Suffix“-K1” through “-K6,” plus optional copper bus, Catalog NumberSuffix “-Z5.”How to Order1. Complete the worksheet on page 5 to determine the completecatalog number of the desired unit of Remote SupervisoryVista Underground Distribution Switchgear.2. Obtain the catalog number of desired accessories,USB cable kit, and touch-up kit from the tables onpage 15.4 S&C Specification Bulletin 682-31