变压器交流耐压试验中发现的故障分析

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(,262700)(,262700)(,262700)::35kV,1SL7-3150ö35SFZ7-10000ö35,,,::TDJ;:25kVA;:150kVö380V;:0.168Aö65.8A;:7.9%::TDJA-25ö0.5;:25kVA;:380V;:0450V;:85A;:55A,Uel72kVU1=UelöKe=72000ö(150000ö380)=182VUe230kV,U2=Ue2öKe=30000ö(150000ö380)=76V,,,$U=2kV,,U=(72000-2000)ö(150000ö380)=177V,,,174V,,,,170V,,,,,,172V,158mA,,3s,,,158170mA,,,,:;,,,,A2cm,2cm,,,,170V,,43199610©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,55kVö2.5mm,,,,?::Cx=R4CN100+R3RN(R3+Q)=318450100+7460(74+0.5)=6197pFR4,31848CN,50pFRN,,RN=608Q,Q=0.58R3,R3=748:IC=XCXUelIc=XCxUel=314619710-1272103=140mA:$U=UelXCxU2HSHZK%=72103314619710-12(150103)225103719à=9961V10kVCXUHSHZk$U2mkV,,:U=Ue-$UKe=157V,70kV+10kV=80kV,72kV,85kV,(),,;,(),,,,,,,A,,,,,,:(1),,,(2),(3),,,(4),,(:1996-04-02)53199610©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.

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