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1、带电检测技术试卷及答案（Testpapersandanswersforlivedetectiontechnology）TestpaperoflivedetectiontechnologyforNorthChinaPowerGridCorpFirst,choosethequestion(DanXuan)(1points,20pointseach)1、thelivedetectionofcircuitbreakerbelongstoDoverhaulinconditionmaintenance.A.classaB.BclassC.CclassD.Dclass2,SF6circuitbrea
2、kerChargeditemsincludeinfrareddetection,SF6gashumidityandpurity,SF6gasdecompositionand(B).DetectionofB.SF6gasleakagebyA.ultrasonicpartialdischargedetectionDetectionofD.transientgroundvoltagebasedonC.UHFPartialDischargeDetection3,UHFpartialdischargedetectiontechnologyreferstothefrequency(D)interv
3、alofthepartialdischargesignalcollection,analysis,judgmentofadetectionmethodA.20k-200kHzB.3M-30MHzC.30M-300MHzD.300M-3000MHzGISandtanktypecircuitbreakerpartialdischargereasondoesnotbelongtothe4,thefollowingoptionsare(C)BurrdischargeonA.conductororgroundingshellB.basintypeinsulator/insulatorsurfac
4、eC.GISandtankbreakerbodysurfacedirtD.shieldbadcontact5.Theinstallationmethodofultrasonicpartialdischargesignalsensoris:(A)A.GISB.isinstalledontheshellclosetothenonshieldingpositionofGIS,suchastheobservationhole,theinsulatingBasinTheC.ismountedontheGISgroundingwireontheD.GIScavityopening6,iftheex
5、istenceoffreeparticlesinGISisfoundbyultrasonictesting,itisexpressedas(A).TheA.valueandpeakvaluewereverylarge,andthecorrelationbetween100Hzand50HzwasnotB.Therewasstrong100Hzcorrelation,and50HzwasalmostabsentC.phasemodemultiverticallineD.50Hzstrongcorrelation7,ifdetectedbyultrasonicmethod,thereisp
6、otentialsuspensiondischargeinGIS,whichisexpressedas(B).TheeffectivevalueandpeakvalueofA.wereverylarge.Therewasnostrongcorrelationbetween100Hzand50HzinB.,and50Hzwasalmostabsentin100HzC.phasemodemultiverticallineD.50Hzstrongcorrelation,100Hzcorrelationisweak8.ThetypicalAtlasofultrasonicpartialdisc
7、hargedetectionbelongsto(C).A.freeparticle,B.potential,suspendeddischarge,C.burrdischarge,D.mechanicalvibration9,theexternalUHFpartialdischargesignalsensorinstallationmethodis:(B)A.GISB.isinstalledontheshellclosetothenonshiel
