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Type8BK40Switchgearupto17.5kV/63kAwithWithdrawableCircuit-BreakersMedium-VoltageSwitchgearCatalogHA25.312000Type8BK40Switchgearupto17.5kV/63kAwithWithdrawableCircuit-BreakersAir-Insulated,Metal-Enclosed,Metal-Clad,SingleandDoubleBusbar12345AMedium-VoltageSwitchgearCatalogHA25.31·2000AppendixCatalogindex22Conditionsofsaleanddelivery,24export,regulations,trademarks,dimensions©SiemensAG2000StandardsStandards,specifications,19to21guidelinesMechanicalandElectricalDesignBasicpaneldesign11to13High-voltagepart14to17Low-voltagepart18ProductRangeSinglebusbarpanels6to9Doublebusbarpanels10TechnicalDataElectricaldata,dimensions4Installationdetails,shippingdetails5Application,FeaturesTypicaluses,personnelsafety,2and3equipmentreliability,operationContentsSupersedes:CatalogHA25.31·1994Type8BK40Switchgearupto17.5kV/63kAwithWithdrawableCircuit-Breakers2SiemensHA25.31·2000FeaturesApplicationPersonnelsafetySwitchingoperationswithdoorclosedPersonnelsafetyisin-creasedby:•Openingandclosingofthecircuit-breaker–Inthedisconnectedorconnectedposition–Mechanicallyorelectri-cally–Withthedoorclosed•Isolationbymovingthewithdrawablesectionmanuallyorbymeansofamotor-operatedmecha-nism,withthedoorclosed•Verificationofsafeisola-tionfromsupply.Accor-dingtoVDE0105,Part1,therearethreealterna-tivemethods:–Closingamake-proofearthingswitchwiththedoorclosed–Pole-by-poletestingwithacapacitivevoltageindicatorwiththedoorclosedProtectionagainstelec-tricshockandingressofsolidforeignbodies8BK40switchgearprovidesbothexternalandinternalprotection.•Externalprotectionisprovidedby–Completeenclosureofthepanelsinalloperatingstates•Internalprotectionisprovidedby–Internalmetalcom-partmentalizationwithenforced-operationshutters–Partitionsbetweenthepanels•Thedegreeofprotec-tionprovidedinthestandardversionisIP3XD.Higherdegreesofprotection,suchasIP41,IP50andIP51canbeachievedbyimple-mentingadditionalmeasuresR-HA25-297eps18BK40switchgearwithwithdrawablecircuit-breakers–TestingwithconventionalvoltagedetectorstoVDE0681,Part4,butwiththedooropen•Manualopeningandclos-ingofthemake-proofearthingswitchonthefeeder,withthedoorclosed–Onthefeederandthebusbar:manuallyormotor-operatedInterlockingofdoor/with-drawablesectionThedoorisincorporatedintheinterlockingconceptasfollows:•Openingispossibleonlywhentheswitchgeartruckislockedinthedis-connectedposition•Theswitchgeartruckcanbemovedfromthedisconnectedtotheconnectedpositiononlywhenthedoorisclosed8BK40switchgearwithwithdrawablecircuit-breakersforindoorinstallationissuitablefor:nRatedvoltagesupto17.5kVnRatedshort-circuitbreakingcurrentsupto63kAnRatedbusbarnormalcurrentsupto5000AnRatedfeedernormalcurrentsupto5000ATypicalusesnPowerstationsnTransformerandswitchingsubsta-tionsofpowersupplycompaniesnCementindustrynIronandsteelworksnRollingmillsnChemicalindustrynMineraloilindustrynPipelinesnElectrochemicalsnPetrochemicalsType8BK40Switchgearupto17.5kV/63kAwithWithdrawableCircuit-BreakersSiemensHA25.31·20003FeaturesOperationalreliabilitySwitchgearinterlockingAllinterlocksaremechanicalwithpreventive,key-operatedaccessshutters,i.e.:•Operatingleverscanonlybeinsertedwhentheinterlockingconditionsarefulfilled•Thispreventsimpermissibleover-strainingoftheinterlockingmecha-nismsElectricstrengthAdequateelectricstrengthof8BK40switchgearisassuredby:•Sufficientlylargeairgapsbetweenphasesandtoearth•SuitableelectrodeformsHighestlevelofindependenceofclimateandenvironmentThisisprovidedby:•Ribbedinsulatorsincastresin,withhighresistancetopollution•TotalenclosureunderalloperatingconditionsMaintenanceMinimummaintenanceeffortisas-suredby:•Totalenclosureunderalloperatingconditions•Useofproven,maintenance-freevacuumswitchgearAvailabilityEasyprocurementofpartsforexten-sionsandrepairsthroughtheuseof:•Standardinsulators•Standardinstrumenttransformers•Standardvacuumswitchingdevices•Standardcoppersections•Withforcedventilation:exchangeofthefanwithoutoperationbeinginterruptedInterlockingconditionsThefollowingoperatingpro-cedurescanbeexecutedassoonasthestandardinter-lockingconditionslistedbe-lowarefulfilled:•Movingthewithdrawablesectionfromthediscon-nectedtotheconnectedposition:–Low-voltageconnectorpluggedin–High-voltagedoorclosed1)–Circuit-breaker“OFF”–Make-proofearthingswitch“OFF”1)•Movingthewithdrawablesectionfromtheconn-ectedtothedisconnect-edposition:–Circuit-breaker“OFF”•Operatingthecircuit-breaker:–Withdrawablesectionintheinterlockedendposi-tion•Operatingthemake-proofearthingswitch:–Switchgeartruckintheinterlockeddisconnectedposition1)•Openingthehigh-voltagedoor:–Switchgeartruckintheinterlockeddisconnectedposition1)Movingtheswitchgeartruckoutsidethepanel:Theswitchgeartruck(whichconsistsofthewithdrawablesectionandthetruck)canbemovedeasilyandwithoutanyproblemoutsidethepanel:•Byoneperson•WithouttoolsMovingthewithdrawablesectioninsidethepanelInsidethepanel(onlywhenthehigh-voltagedoorisclosed),littleeffortisrequiredtomovethewith-drawablesection(withouttruck),eithermanuallyormotor-opera-ted,bymeansof:•Spindledrive•Ball-bearingrollersRemotecontrolThefollowingfunctionscanbecont