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1、TypeRandTypeVVacuumCircuitBreakerTraysDescriptiveBulletinIntroductionUserConnectionsTheTypeRandTypeVvacuumcircuitbreakertraysaretheSixplatedcopperterminalpadswithstandardNEMA4holeindustrialapplicationoftheTypeRandTypeVoutdoorcircuitspacing,suitableforcopperoraluminumbus,orcableconnectorsbreakers.Typ
2、eRisusedforapplicationsat15kVor27kV,andarestandard.TypeVforapplicationsat38kV.ThesedesignsaretobeusedforAsingle16poleauxiliaryswitchisstandardandisalsoavailableindoorapplications.Theyareprimarilyusedbyutilitiesforwith20or32poles.Inallcases,theswitchesareconfiguredas50%updatingolderindooroilcircuitbr
3、eakers.Theyarealsousedby“A”and50%“B”contacts.SeeTable3onbackpage.OEMsasthebasicbreakerfortheirequipmentorforswitchingmetal-enclosedcapacitorbanks.ControlVoltagesAC:120Vor240VApplicationDC:48V,125Vor250VABBvacuumbreakertraysaredesignedforawiderangeofapplications,fromlineswitchingtofaultcurrentinterru
4、ption.TheseTripVoltagebreakersmustbeappliedwithintheirvoltageandcurrentratings.DCtrip:24V*,48V,125V,or250VTheTypeRorTypeVbreakertrayscanbeappliedincapacitorCapacitortriponlyfor120VACor240VACswitchingapplications.ABBoffersacapacitorswitchingsolution*24VDConTypeRonlythatsignificantlyreducessystemdistu
5、rbancesduringclosing.ThezerovoltageclosingoptionachievesthisbenefitbycontrollingtheCloseVoltageinitialclosingpointonthevoltagewaveform,andcontrollingtheAC:120Vor240Vtimeintervalbetweentheclosingofindividualphases.DC:125Vor250VApplicationsinvolvingswitchingofshuntreactors,arcfurnaces,ControlWiringdry
6、transformers,andlargemotorsmayrequiresurgecapacitorsforproperprotection.Theseapplicationsrequirecarefulstudyinorder600Volt,#14AWG,typeSIStoassuretheproperinsulationprocedures.OperatingMechanismsModernizationofolderindooroilbreakerswitchgearisaccomplishedbyremovingtheexistingoilbreakerandinstallingth
7、eTheoperatingmechanismsarethestoredenergytype,springclose-ABBvacuumcircuitbreakertrayintheexistingenclosure,withspringopen.Amotordrivingthrougharatchetmechanismisusedminimumbus,frameandcontrolmodifica
