1,,200333%,200440%,,。()。,,。、,1。,准16~准20,35kV31500kVA~6300kVA。2,。2.1(),,1~2,,,,,。,,。2.2、,,。、,,,、。2.3,,,(163453):,。:;;;:TM406:B:1001-8425(2010)07-0069-03AnalysisandPreventionofOverheatFaultofConnectionPointinMainTransformerYUANFei,YINGJun,ZHANGQing-xia(PowerSupplyCompany,ElectricPowerGroup,DaqingOilField,Daqing163453,China)Abstract:Theoverheatfaultoftheconnectionpointinmaintransformerisanalyzed.Thecontrolandpreventivemeasuresarepresented.Keywords:Transformer;Connectionpoint;Fault;Analysis1Fig.1ConductivestructureofconnectionterminalofexternalleadwireintransformerTRANSFORMER47720107Vol.47JulyNo.72010478mm(35mm43mm),准16~准20,。,、,。33.1。:①,,,,。②,。,。,。,,。。,。,,,。3.21,→→→→→→→。:①。②。③。:(1),。(2),。(3),。(4),,。3.3,(1)。(1)M20,436mm2,332mm2,242mm2。,准23mm,准35mm,547mm2,2422.26。。(2),15N·m~20N·m,20μΩ,,。,,,1000μΩ,。,,。(3),,,50μΩ~100μΩ,,60N·m,,;,,———。,。4:、,、,2。。(1)———、,,750mm2,242mm23。,、、。30N·m,14μΩ;,,8μΩ,,。(2)14328.8M20准382Fig.2Newbrassnut70、、7,,,。,12mm,,,———,3。(3),,,。2004,,60准20。。5,。(1)准16~准20,。(2)、,,。(3),。(4),,35N·m~45N·m,。(5),,30μΩ。,,,,,,。:[1].[M].:,1998.3Fig.3Newconductivestructure:2009-04-23:(1972-),,,,;(1970-),,,,。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,ρ,ρ,,,ρ。,,,,ρ,。4---,,,,,。:[1].[M].:,2003.[2]()С.Б..[M].,.:,1983.[3].[M].:,1996.:2009-10-29:(1967-),,,、,;(1960-),,,、,。(5)71