Product Code:SAE AS20708/78
Title:Synchro, Control Transmitter, Type 26V-08CX4C
Issuing Committee:Ae-7a Generators And Controls Motors And Magnetic Devices
Scope:No Scope Available【英文标准名称】:Short-circuitcurrentsinthree-phasea.c.systems-Part4:Examplesforthecalculationofshort-circuitcurrents
【原文标准名称】:三相交流系统中的短路电流第4部分:短路电流计算举例
【标准号】:IEC/TR60909-4-2000
【标准状态】:现行
【国别】:国际
【发布日期】:2000-07
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC73
【标准类型】:()
【标准水平】:()
【中文主题词】:效应;电气工程;短路电流;三相电流;电流;交流电流;数学计算
【英文主题词】:
【摘要】:ThispartofIEC60909isatechnicalreportintendedtogivehelpfortheapplicationofIEC60909-0forthecalculationofshort-circuitcurrentsin50Hzor60Hzthree-phasea.c.systems.Thistechnicalreportdoesnotincludeadditionalrequirementsbutgivessupportforthemodellingofelectricalequipmentinthepositive-sequence,thenegative-sequenceandthezero-sequencesystem(clause2)andthepracticalexecutionofcalculationsinalow-voltagesystem(clause3),amedium-voltagesystemwithasynchronousmotors(clause4)andapower-stationunitwithitsauxiliarynetworkfeedingalargenumberofmedium-voltageasynchronousmotorsandlow-voltagemotorgroups(clause5).Thethreeexamplesgiveninclauses3,4and5aresimilartothosegiveninIEC60909(1988)buttheyarerevisedinaccordancewithIEC60909-0,whichreplacesit.Asubclauseisaddedtotheexampleinclause3togiveacomparisonbetweentheresultsfoundwiththeapplicationoftheequivalentvoltagesourceattheshort-circuitlocationfollowingtheproceduregiveninIEC60909-0ontheonehand,andresultsfoundwiththesuperpositionmethodontheotherhand,takingintoaccountdifferentload-flowconditionsbeforetheshortcircuit.Clause6ofthistechnicalreportgivesthecircuitdiagramandthedataofatestnetworkandtheresultsforacalculationcarriedoutinaccordancewithIEC60909-0,toofferthepossibilityforacomparisonbetweentheresultsfoundwithadigitalprogramforthecalculationofshort-circuitcurrentsandthegivenresultsforIk",ip,Ib,Ik,Ik1"andip1inahigh-voltagenetworkwithpower-stationunits,generators,asynchronousmotorsandlinesinfourdifferentvoltagelevels380kV,110kV,30kVand10kV.
【中国标准分类号】:K04
【国际标准分类号】:17_220_01
【页数】:131P;A4
【正文语种】:英语