Dischargetesterhasthreekindsofmodels,whichare:1.Ultrasonicconfiguration:PD2501-A2.Theuhfconfiguration:PD2501-u3.Theultrasonic+uhfconfiguration:PD2501-A/USummary:PD2501-A/UbureauputelectricitytesterwasmadebyGermanPDcompany,thecompanyspecializedinelectricpowerequipmentresearchanddevelopmentandmanufactureofpartialdischargedetectionequipment,includingGISpartialdischargetestequipment/GIL,transformerpartialdischargetesttestequipment,generatorpartialdischargetestequipmentandcablepartialdischargetestequipmentandsoon. GISbecauseofitssmallsizeandhighreliabilityiswidelyused,buttherearealsobecauseoffreeparticles,insulationfaulthappensintheinsulatorandthedefectisaccompaniedbypartialdischargeoccurs,thuspartialdischargedetectionisoneoftheeffectivemethodsofelectricpowerequipmentinsulationconditiondiagnosis.TheAIACompactpartialdischargetesterismainlyusedinGIS,GILpartialdischargetest.Thedeviceisaportabletestingequipment,canalsobeappliedtothetransformer,thepartialdischargemeasurementofcableaccessories.Forthediagnosisofsomedefect,suchasaerosols,ultrasonictestingismuchbetterthantheusualelectricaltestoftheparticulatematterinthenewlyinstalledorafteroverhauloftheGIS,canleadtoflashflippingorbreakdown.Thisequipmentcanalsobeconnectedultra-highfrequency(UHF)sensors,frequencybandwidth:300MHZto2GHZ.Thedevicecanautomaticallyidentifytypesofsensors,automaticconversionbetweendifferenttypesofsensors.UHFUHFmethodismeasuringtechniquedevelopedinrecentyears,itadoptsthemeasurementwithintheGISinsulationhiddendangersinoperatingvoltageundertheradiationofelectromagneticwavetodeterminewhetherGISinternalpartialdischarge,UHFfrequencymethod,thebiggestadvantageiscaneffectivelyrestrainbackgroundnoise,suchascoronaproduceelectromagneticinterference.UHFsignalfrequencyishigh,strongpenetrability,aftertheinsulator,canthroughtheinsulatorwithmetalflangejointexternalarrivedinGIS,andthereforecanbeontheoutsideofthebasininsulatormeasuringUHFsignalwithintheGIS.