常见的接地故障电气火灾隐患及其防范

(834003),,,CommonincipientfaultearthfaultfirehazardanditscountermeasuresLiJingquan(InstituteofDesignofKaramayPetrochemicalComplex,CNPC,XinJiang834003)AbstractTheformingprincipleandcharacteristicsofearthfaultelectricalfirehazardsareexpoundedinthispaper.Withregardtotheactualpracticeofmanufacturingfactory,incipientfaultofearthfaultfirehazardispointedoutandcorrespondingcountermearsuresisproposed.Keywordsearthfaultfirehazardelectricarcequipotential1()(),,,,,,2,,,,,,,,,,,,PEN,,,33.1PE,1,(380ö220V),TNS()(),404PE4,,,,(d1),(d2),(d3),d1,Id130A,Uf1=Id1R=30A48=120V,PEN120V;d2(d3),,:Uf2=Id2ZPE=[U0ö(ZL+ZPE+ZB)]ZPEU0,220V;ZLZPEUBPE,863IndustrialSafetyandDustControl20009September2000©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1ZB,ZPE=ZL,Uf2=110V(),PE,PEPE,,,,,20V,,10mm30kV,20V,,,,,PE,,PE,PE,,2A2000,0.5A,,,3.2N2,AB,BAQF1B,A,QF1QF2,BA,ANPE,PEB,NNBNPE,B,,2AB4,,,,(1),,,PEN,(2),,73©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,(3),,N(4),(300500mA),,5,,,,,,,(:2000-04-12)1999();;,,,199919995,,,,,,,,,,,,,,ÉÊ,,88,,102,,,,,,,,()83©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.