低压断路器分断能力的计算和选择

42(2007No.1)Abstract:Underratedvoltageandratedcurrenttocalculateshortcircuitcurrentcorrectlyandtoselectlow-voltagecircuitbreakproperlymayreduceshortcircuitetcbreakdownstotakeplaceinpowerdistributionnetworkandindustrialequipment.Descriptionwasmadeforthedefinitionandstandardofcircuitbreakbreakingcapacity,analysiswascarriedoutforselectionofratedshortcircuitbreakingcapacity,givingoutcalculationformulaofshortcircuitcurrent,havinganalyzedthatwheninselectionofratedshortcircuitbreakingcapacity,cautionsshouldbepaidwithattention.Keywords:circuitbreaker;protection;breakingcapacitySHENYuan-linSuzhouNo.1ElectricalAppliancesFactory,Suzhou215001,ChinaCalculationandSelectionofLow-voltageCircuitBreakerBreakingCapacity43(2007No.1)44(2007No.1)