gcjs-d抗干扰介损测试仪操作使用说明书（英文版）

CONTENTSIOVERVIEW1IIOPERATINGPRINCIPLE1IIIMAINTECHNICALPARAMETERS5IVINSTRUMENTPANEL5VOPERATINGINSTRUCTIONS7VICONNECTION91POSITIVECONNECTION92NEGATIVECONNECTION93CVTSELFEXCITATIONMEASUREMENT11VIIPRECAUTIONS15VIIIFULLSETOFINSTRUMENT16IXREFERENCECONNECTIONMETHOD17INTELLIGENTTGMETERIOVERVIEWINTELLIGENTTGMETERISAKINDOFINSTRUMENTWITHHIGHPRECISIONFULLYAUTOMATICMEASURINGTHEDIELECTRICLOSSTANGENTANDCAPACITANCEOFVARIOUSHIGHVOLTAGEELECTRICALEQUIPMENTSINTHEPOWERPLANTSANDSUBSTATIONSTHEADOPTIONOFFREQUENCYCONVERSIONTECHNOLOGYCOULDENSURETHEACCURATEMEASUREMENTINTHEINTERFERENCEOFSTRONGELECTRICFIELDTHEOPERATIONINSTRUCTIONOFTHEINSTRUMENTISCHINESETHEWHOLEPROCESSISMEASUREDAUTOMATICALLYTHROUGHMICROCOMPUTERTHEINSTRUMENTALSOAPPLIESTOTHEMEASUREMENTOFTGANDELECTRICALCAPACITYOFHIGHVOLTAGEELECTRICALEQUIPMENTSINTHEWORKSHOPS,LABORATORIESANDRESEARCHINSTITUTESITCOULDMEASURENONGROUNDEDORGROUNDEDHIGHVOLTAGEEQUIPMENTSADOPTINGPOSITIVEANDNEGATIVECONNECTIONMETHODBESIDES,ITCOULDMEASURETHETGOFCAPACITORVOLTAGETRANSFORMERANDCAPACITANCEOFMAINCAPACITORC1ANDC2THEINSTRUMENTISEQUIPPEDWITHHIGHVOLTAGESTEPUPTRANSFORMERBESIDES,ITTAKESSECURITYMEASURESLIKEZEROCROSSCLOSING,LIGHTNINGPROTECTION,ETCDURINGTHEEXPERIMENT,DIFFERENTLEVELSOFHIGHVOLTAGERANGINGFROM05KVTO10KVAREOUTPUTTEDTHEINSTRUMENTHASTHEADVANTAGESOFCONVENIENTANDSAFEOPERATIONUNDERTHECIRCUMSTANCEOFOILDIELECTRICLOSS001,WITHOILCUP,POSITIVEWIRINGCANBEUSEDTOMEASURETHEDIELECTRICLOSSOFOILTHISFOLLOWINGPROTECTIONFEATURESARENOTINCLUDEDINTHISINSTRUMENTHIGHVOLTAGESHORTCIRCUITPROTECTIONCVTOVERVOLTAGEPROTECTIONPOORGROUNDINGPROTECTIONIIOPERATINGPRINCIPLEUNDERTHEACVOLTAGE,THEDIELECTRICWOULDCONSUMEAPARTOFELECTRICALENERGYTHATWOULDBECONVERTEDTOHEATENERGYLEADINGTOLOSSTHISKINDOFENERGYLOSSISCALLEDTHEDIELECTRICLOSSWHENACVOLTAGEISAPPLIEDTOTHEDIELECTRIC,PHASEANGLEDIFFERENCEEXISTBETWEENTHEVOLTAGEANDCURRENTOFDIELECTRICTHEWHICHISTHECOMPLEMENTARYANGLEOFISTHEDIELECTRICLOSSANGLETHETGWHICHISTHETANGENTOFISDIELECTRICLOSSTANGENTTHEVALUEOFTGISTHEPARAMETERFORMEASURINGTHEDIELECTRICLOSSTHEMEASURINGCIRCUITOFTHEINSTRUMENTINCLUDESASTANDARDLOOPCNANDATESTEDLOOPISCXWHICHISSHOWNINFIGURE1STANDARDLOOPISCOMPOSEDOFBUILTINHIGHSTABLESTANDARDCAPACITORANDMEASUREMENTCIRCUITTHETESTEDLOOPISCOMPOSEDOFSPECIMENANDMEASUREMENTCIRCUITTHEMEASUREMENTCIRCUITISCOMPOSEDBYSAMPLINGRESISTANCE,PREAMPLIFIERANDA/DCONVERTERTHECURRENTAMPLITUDEANDPHASEOFSTANDARDLOOPANDTESTEDLOOPCANBEMEASUREDBYTHEMEASUREMENTCIRCUITANDBECOLLECTEDREALTIMEDIGITALLYBYSINGLECHIPCOMPUTERTHECAPACITANCEVALUEANDDIELECTRICLOSSTANGENTOFTHESPECIMENCOULDBEOBTAINEDTHROUGHVECTOROPERATIONANTIINTERFERENCEMEASURESAREADOPTEDBYTHEINSTRUMENTSOASTOMAKEACCURATEMEASUREMENTINTHEINTERFERENCEOFEXTERNALELECTRICFIELDFIGURE1SCHEMATICDIAGRAMOFMEASUREMENTPRINCIPLE电压控制VOLTAGECONTROL光耦OPTICALCOUPLERA/D转换极性判别IDENTIFICATIONOFA/DPOLARITYCONVERSION显示INDICATION打印PRINTINGCPU控制中心CPUCONTROLCENTER1STRUCTURE总电源MAINPOWER内高压允许INTERNALHIGHVOLTAGEALLOWABLE380V保护380VPROTECTION打印机PRINTER显示器INDICATOR按键BUTTON通讯COMMUNICATION控制面板CONTROLPANEL变频电源VARIABLEFREQUENCYPOWERSUPPLY升压变压器STEPUPTRANSFORMER内CNINTERNALCN通讯测量电路COMMUNICATIONMEASUREMENTCIRCUITCX反接线电流检测CXNEGATIVECONNECTIONCURRENTDETECTIONCX正接线电流检测CXPOSITIVECONNECTIONCURRENTDETECTION屏蔽SHIELD芯线CORE数字隔离通讯DIGITALISOLATIONCOMMUNICATION芯线屏蔽CORESHIELDING仪器结构框图BLOCKDIAGRAMOFINSTRUMENTSTRUCTUREMEASUREMENTCIRCUITFOURIERTRANSFORM,COMPLEXARITHMETIC,ANDALLOTHERCALCULATIONSANDRANGESWITCHING,VARIABLEFREQUENCYPOWERCONTROL,ETCCONTROLPANELPRINTER,KEYBOARD,INDICATORANDCOMMUNICATIONTRANSFERRINGVARIABLEFREQUENCYPOWERSUPPLYSPWMSWITCHINGCIRCUITISADOPTEDTOGENERATEANDOUTPUTHIGHPOWERSINEWAVESTABLEVOLTAGESTEPUPTRANSFORMERTHEOUTPUTOFVARIABLEFREQUENCYPOWERSUPPLYISSTEPPEDUPTOTHEMEASURINGVOLTAGETHEMAXIMUMREACTIVEPOWEROUTPUTIS2KVA/ONEMINUTESTANDARDCAPACITORINTERNALCNITISTHEMEASURINGBASISCNCURRENTDETECTIONITISUSEDTODETECTTHEINTERNALSTANDARDCAPACITORCURRENT,10A1ATHEINPUTRESISTANCEIS2CXPOSITIVECONNECTIONCURRENTDETECTIONITISONLYUSEDFORTHEMEASUREMENTOFPOSITIVECONNECTION,10A1ATHEINPUTRESISTANCEIS2CXNEGATIVECONNECTIONCURRENTDETECTIONITISONLYUSEDFORTHEMEASUREMENTOFNEGATIVECONNECTION,10A1ATHEINPUTRESISTANCEIS2NEGATIVECONNECTIONDIGITALISOLATIONCOMMUNICATIONPRECISIONMPPMDIGITALMODEMISADOPTEDTOTRANSMITTHECURRENTSIGNALOFNEGATIVECONNECTIONTOTHELOWVOLTAGESIDETHEISOLATIONVOLTAGEIS20KV2OPERATINGPRINCIPLEAFTERTHEMEASURINGISSTARTED,THEHIGHVOLTAGESETTINGVALUEWOULDBETRANSMITTEDTOTHEVARIABLEFREQUENCYPOWERSUPPLYTHATWOULDADJUSTTHEOUTPUTTOTHESETTINGVALUEBYTHEALGORITHMOFPIDTHEMEASUREMENTCIRCUITWOULDSENDTHEACTUALMEASUREDHIGHVOLTAGETOTHEVARIABLEFREQUENCYPOWER,FINELYADJUSTTHELOWVOLTAGEANDREALIZETHEACCURATEHIGHVOLTAGEOUTPUTACCORDINGTOTHESETTINGOFPOSITIVEANDNEGATIVECONNECTION,THEMEASUREMENTCIRCUITWOULDAUTOMATICSELECTTHEINPUTANDSWITCHTHERANGEBASEDONTESTINGCURRENTFOURIERTRANSFORMISADOPTEDFORFILTERINGOUTINTERFERENCESOASTOSEPARATETHEFUNDAMENTALWAVEOFSIGNAL,MAKEVECTOROPERATIONSOFTHESTANDARDCURRENTANDSPECIMENCURRENT,ANDCALCULATETHECAPACITANCEANDTHETGAFTERREPEATEDMEASUREMENTS,THEINTERMEDIATERESULTWOULDBESELECTEDAFTERTHECOMPLETIONOFMEASUREMENT,THEMEASUREMENTCIRCUITWOULDSENDSTEPDOWNINSTRUCTIONTOMAKETHEVOLTAGEOFVARIABLEFREQUENCYPOWERTOBEREDUCEDTO0SLOWLYIIIMAINTECHNICALPARAMETERS1HIGHVOLTAGEOUTPUT0510KVINCREASINGBY500VFOREACHLEVEL,ATOTALOF20LEVELS,CAPACITY1500VA2ACCURACYTGREADING15004CXREADING155PF3RESOLUTIONTG001CX1PF4MEASURINGRANGE01TG503PFCX60000PFWHENITIS10KV,CX30000PFWHENITIS5KV,CX60000PF5POWERSUPPLYAC220V10501HZ6HARMONICADAPTATION37APPLICATIONCONDITION1550RELATIVEHUMIDITY808DIMENSION460L335W340H9WEIGHT30KGIVINSTRUMENTPANEL1THEDIAGRAMFORCONTROLPANELFIGURE2ANDHIGHVOLTAGEBACKPLANEFIGURE3FIGURE2FIGURE3智能介损测试仪INTELLIGENTDIELECTRICLOSSTESTER（INTELLIGENTTGMETER）高压危险DANGERHIGHVOLTAGE正接线示意图DIAGRAMOFPOSITIVECONNECTION（DIAGRAMOFSTRAIGHTPOLARITY）反接线示意图DIAGRAMOFNEGATIVECONNECTION（DIAGRAMOFREVERSEPOLARITY）打印机PRINTER显示屏INDICATORCX试品输入CXSPECIMENINPUT（CXEUTINPUT）CVT电压CVTVOLTAGE内高压开关INTERNALHIGHVOLTAGESWITCH（KINETIXSWITCHEMERGENCEOFF）总电源开关MAINPOWERSWITCH电源输入POWERINPUT（PROTECTIVETUBE5AAV220V50HZ）退出ESC确认ENTER高压输出端HIGHVOLTAGEOUTPUTTERMINALCXSPECIMENINPUTTHESPECIMENCURRENTSHOULDBEINPUTTEDWHENITISPOSITIVECONNECTEDTHECOREREDCLIPSHOULDBECONNECTEDWITHLOWVOLTAGETERMINALOFSPECIMENWHENITISPOSITIVECONNECTEDIFTHESHIELDINGELECTRODEISAVAILABLEINTHELOWVOLTAGETERMINAL,THESHIELDEDCABLEBLACKCLIPCOULDBECONNECTEDOTHERWISE,ITCOULDBEHUNGWHENITISNEGATIVECONNECTION,CXSPECIMENINPUTWIRECOULDBEUNCONNECTEDORHUNGEARTHCONNECTIONMEASUREMENTITISCONNECTEDWITHTHESHELLINTHEPOSITIVEANDNEGATIVEMEASUREMENTS,THEINSTRUMENTCOULDBERELIABLYANDINDEPENDENTLYGROUNDEDTHEGROUNDINGCONDUCTORCANNOTBEPAINTEDORRUSTYITSHOULDBEWIPEDCLEANANDMAKESUREZERORESISTANCEGROUNDINGPOORGROUNDINGCOULDCAUSEERRORSORDATAFLUCTUATIONIFITISSEVERE,ITMAYCAUSEDANGERINTERNALHIGHVOLTAGEALLOWABLETURNINGONTHISSWITCH,HIGHVOLTAGEWOULDBEOUTPUTTEDTURNINGOFFTHESWITCH,HIGHVOLTAGEWILLNOTBEGENERATEDINTHEINNERANDWILLNOTBEOUTPUTTEDMAINPOWERSWITCHTURNINGONTHISSWITCHANDTHEINDICATORWOULDDISPLAYTHEMEASURINGCONTENTKEYBOARD“ESE“,“ENTER“,“”,“”“ESC“DENIALOFTHECONTENTWHERETHECURSORISLOCATEDORTHECONTENTHASBEENCOMPLETED“ENTER“ONCERECOGNITIONOFTHECONTENTWHERETHECURSORISLOCATED,YOUCANPRESSTHISKEYTOCONFIRMANDMOVETHECURSORTOOTHERPLACE“”,“”CHANGINGTHEVALUEORCHANGINGPPOSITIVECONNECTION,NNEGATIVECONNECTION,DDIFFERENTFREQUENCY,WWORKINGFREQUENCYANDOTHERCONTENTSINDICATORDISPLAYINDICATINGMENUS,MEASUREMENTINFORMATION,MEASUREMENTRESULTSSUNEXPOSUREFORLONGTIMESHOULDBEAVOIDEDBRIGHTNESSADJUSTMENTADJUSTINGTHECONTRASTDEGREEOFSCREENVOPERATINGINSTRUCTIONSTHEDIELECTRICLOSSOFHIGHVOLTAGEWINDINGFORLOWVOLTAGEWINDINGANDSHELLINTHEMEASUREMENTOFPOWERTRANSFORMERSISANEXAMPLETHENEGATIVECONNECTIONSHOULDBEADOPTEDSEETHEDIAGRAMOFNEGATIVECONNECTIONMETHODAFTERCHECKINGTHEPROPERCONNECTIONOFTHEINSTRUMENTWITHPOWERTRANSFORMER,DDIFFERENTFREQUENCYAND10KVVOLTAGESHOULDBESELECTEDFORMEASUREMENTANDTHEFOLLOWINGOPERATIONSSHOULDBEMADETURNONTHEMAINPOWERSWITCH,THEDISPLAYOFTHESCREENOFINSTRUMENTISSHOWNINFIGURE4FIGURE4STARTUPDISPLAYFIGURE5CONNECTINGMODEFIGURE6VOLTAGEMEASUREMENTPRESSINGTHE“ENTER“,THECURSORWOULDGOTOTHE“MEASURINGMETHODW“,PRESSING“”,“”,ITCOULDBEADJUSTEDTO“MEASURINGMETHODD“,PRESSING“ESC“,THECURSORWOULDGOTOTHEFIRSTLINE,ANDTHENPRESSING“”,ITWOULDBEMOVEDDOWNTOTHE“CONNECTIONMODE“WHICHMEASURINGMETHODWCONNECTINGMODEPMEASURINGVOLTAGE5KVSTARTTOMEASUREMEASURINGMETHODDCONNECTIONMODEPMEASURINGVOLTAGE5KVSTARTTOMEASUREMEASURINGMETHODDCONNECTIONMODENMEASURINGVOLTAGE10KVSTARTTOMEASUREISSHOWNINFIGURE5PRESSINGTHE“ENTER“,THECURSORWOULDGOTOTHE“CONNECTIONMODEP“”,“”,ITCOULDBEADJUSTEDTO“CONNECTIONMODEN“,PRESSING“ESC“,THECURSORWOULDGOTOTHEFIRSTLINE,ANDTHENPRESSING“”,ITWOULDBEMOVEDDOWNTOTHE“MEASURINGVOLTAGE“WHICHISSHOWNINFIGURE6PRESSINGTHE“ENTER“,THECURSORWOULDGOTOTHE“MEASURINGVOLTAGE05KV“,PRESSING“”,“”,THEVOLTAGECOULDBEADJUSTEDAMONG05,10,15,20,259510KV,PRESSING“ESC“,THECURSORWOULDGOTOTHEFIRSTLINE,ANDTHENPRESSING“”,ITWOULDBEMOVEDDOWNTOTHE“STARTTOMEASURE“WHICHISSHOWNINFIGURE7FIGURE7STARTTOMEASUREFIGURE8MEASURINGFIGURE9MEASUREMENTRESULTFIGURE10PRINTINGRESULTSTURNINGONTHE“HIGHVOLTAGEALLOWABLE“SWITCH,PRESSING“ENTER“,THEINSTRUMENTWOULDBEGINTOPRODUCEHIGHVOLTAGEOUTPUTACCOMPANIEDBYTHEHINTSOUNDOF“BEEP“,ATTHISTIME,THESCREENWOULDSHOW“ITISBEINGMEASURED,PLEASEWAIT“WHICHISSHOWNINFIGURE8AFTERABOUT40SECONDS,THEMEASUREMENTWOULDBECOMPLETEDTHEHIGHVOLTAGEWOULDBECUTOFFAUTOMATICALLYANDTHESCREENWOULDDISPLAYTHEMEASUREMENTRESULTS,WHICHISSHOWNINFIGURE9IFTHERESULTSNEEDTOBEPRINTEDOUT,YOUNEEDTOPRESS“ENTER“ITISSHOWNINFIGURE10INTHEBOOTSCREEN,PRESSINGTHE“ESC“THEN40SETSOFHISTORICALDATACOULDBECHECKEDVICONNECTIONPROPERCONNECTIONMETHODSHOULDBESELECTEDINACCORDANCEWITHTHEGROUNDINGOFTESTEDEQUIPMENT1PPOSITIVECONNECTIONIFTHELOWVOLTAGEMEASURINGTERMINALORSECONDARYPORTOFEQUIPMENTUNDERTESTISGROUNDINSULATED,POSITIVECONNECTIONSHOULDBEADOPTEDITISBEINGMEASURED,PLEASEWAITDIELECTRICLOSSTG042CAPACITANCE1000PMEASURINGMETHODDCONNECTIONMODENMEASURINGVOLTAGE10KVSTARTTOMEASUREFREQUENCYWCONNECTIONMODENVOLTAGE10KVDIELECTRICLOSSTG042CAPACITANCE1000PTHEREDSPECIALHIGHVOLTAGECABLESHOULDBELEDOUTFROMTHEHVXWHICHISONTHEBACKOFTHEINSTRUMENTTHEHIGHVOLTAGESHIELDEDCABLESHOULDBECONNECTEDWITHTHEHIGHVOLTAGETERMINALOFEQUIPMENTUNDERTESTTHEBLACKSPECIALLOWVOLTAGECABLESHOULDBELEDOUTFROMCXWHICHISONTHEPANELOFINSTRUMENTTHELOWVOLTAGECORESHOULDBECONNECTEDTOTHELOWVOLTAGETERMINALLOFEQUIPMENTUNDERTESTSEEFIGURE11THELOWVOLTAGESHIELDEDCABLESHOULDBECONNECTEDTOTHESHIELDINGTERMINALEOFEQUIPMENTUNDERTESTIFSHIELDINGTERMINALISUNAVAILABLE,THENITCOULDBEVACANTTHECORESOFHVXANDCXARENOTALLOWEDTOBESHORTENEDWITHTHESHIELDEDCABLEOTHERWISE,ITISIMPOSSIBLETOSAMPLINGANDTOMEASURE2NNEGATIVECONNECTIONIFTHELOWVOLTAGEMEASURINGTERMINALORSECONDARYPORTOFEQUIPMENTUNDERTESTISGROUNDEDDIRECTLY,NEGATIVECONNECTIONSHOULDBEADOPTEDTHEREDSPECIALHIGHVOLTAGECABLESHOULDBELEDOUTFROMTHEHVXWHICHISONTHEBACKOFTHEINSTRUMENTTHEHIGHVOLTAGECORESHOULDBECONNECTEDWITHTHEHIGHVOLTAGETERMINALOFEQUIPMENTUNDERTESTTHELOWVOLTAGETERMINALSHOULDBEGROUNDEDSEEFIGURE12ATTHISTIME,THEINPUTLINEOFCXISVACANTTHECOREOFHVXISNOTALLOWEDTOBESHORTENEDWITHTHESHIELDEDCABLEOTHERWISE,ITISIMPOSSIBLETOSAMPLINGANDTOMEASURE图11正接法图12反接法FIGURE11POSITIVECONNECTIONMETHOD正接线示意图DIAGRAMOFPOSITIVECONNECTION（DIAGRAMOFSTRAIGHTPOLARITY）测试仪METER高压线外屏蔽（黑）EXTERNALSHIELDINGOFHIGHVOLTAGELINEBLACK（HIGHVOLTAGECABLEBLACK）试品SPECIMEN（EUT）CX芯线CXCORE（CXRED）测量接地GROUNDMEASUREMENT（GROUND）FIGURE12NEGATIVECONNECTIONMETHOD反接线示意图DIAGRAMOFNEGATIVECONNECTION（DIAGRAMOFREVERSEPOLARITY）测试仪METER高压线芯线（红）COREOFHIGHVOLTAGELINERED（HIGHVOLTAGECABLERED）试品SPECIMEN（EUT）测量接地GROUNDMEASUREMENT（GROUND）3CVTSELFEXCITATIONMEASUREMENTTHEBUSISNOTGROUNDED,CONNECTIONMODEISCVKEYWIRINGDIAGRAMCVT测量C2接线示意图CVTMEASURINGC2CONNECTIONDIAGRAM测试仪TESTER高压线（屏蔽和芯线）HIGHVOLTAGELINESHIELDINGCABLEANDCORECX芯线CXCORE测量接地GROUNDMEASUREMENTCVT测量C1接线示意图CVTMEASURINGC1CONNECTIONDIAGRAM测试仪TESTER高压线（屏蔽和芯线）HIGHVOLTAGELINESHIELDINGCABLEANDCORECX芯线CXCORE测量接地GROUNDMEASUREMENTACTUALWIRINGDIAGRAM1MEASUREMENTC2THEWIRINGISSHOWNINFIGURE13ATHEENDOFJUNCTIONBOXISOPENEDTOTHEGROUNDANDTHESECONDARYWIRINGSAREVACANTRECORDSHOULDBEMADESOASTOMAKEITRESTOREDAFTERTHETESTINGBTURNINGONTHESWITCHESOFMAINPOWERSUPPLYANDINTERNALHIGHVOLTAGEALLOWABLEOFDIELECTRICLOSSTESTERCMOVINGTHECURSORTOTHE“CONNECTIONMODE“ANDPRESSING“ENTER“PRESSING“OR“,SELECTING“CV“ANDTHENPRESSING“ESC“DMOVINGTHECURSORTO“MEASUREVOLTAGE“ANDCHOOSING1KVANDPRESSING“ESC“MOVINGTHECURSORTO“STARTTOMEASURE“,PRESSING“ENTER“ANDWAITINGFORTHEDISPLAYOFRESULTSIFTHERESULTSNEEDTOBEPRINTEDOUT,PRESSING“ENTER“2MEASURINGC1THEWIRINGISSHOWNINFIGURE14THEBASICOPERATIONISTHESAMEASTHATOFMEASURINGC23NOTETHEC1ANDC2CANONLYBEMEASUREDUNDERTHETESTINGMODEOFCVTCVTWOULDBEDAMAGEDINTHEMETHODSOFPOSITIVECONNECTIONANDNEGATIVECONNECTION图13测C2FIGURE13MEASURINGC2芯线和屏蔽线接CVT高压端COREANDSHIELDINGCABLECONNECTEDTOCVTHIGHVOLTAGETERMINAL高压端HIGHVOLTAGE试品输入SPECIMENINPUT低端输入LOWVOLTAGEINPUTCVT介损测试仪CVTDIELECTRICLOSSTESTER芯线和屏蔽线COREANDSHIELDINGCABLE黑BLACK图14测C1FIGURE14MEASURINGC1芯线接CVT高压端CORECONNECTEDTOCVTHIGHVOLTAGETERMINAL屏蔽线悬空SHIELDINGCABLEISVACANT高压端HIGHVOLTAGE试品输入SPECIMENINPUT低端输入LOWVOLTAGEINPUTCVT介损测试仪CVTDIELECTRICLOSSTESTER芯线和屏蔽线COREANDSHIELDINGCABLE黑BLACKTHEHIGHVOLTAGELINESHOULDBESUSPENDEDWITHOUTCONTACTINGTHEGROUNDOTHERWISE,THEDIELECTRICLOSSOFHIGHVOLTAGELINETOTHEGROUNDWOULDCAUSEERRORTHINCABLESHOULDBEUSEDTOCONNECTHIGHVOLTAGEOUTLETWITHCVTSPECIMENANDSHOULDBEHUNGINADDITION,CONSIDERINGTHEVOLTAGEDIVISIONEFFECTOFSERIESOFC2ORC1WITHINTERNALC1,ITSCAPACITANCESHOULDBECALIBRATEDACCORDINGTOTHEFOLLOWINGFORMULAC1实际值C1ACTUALVALUEC2标称值C2NORMINALVALUEC1测量值C1MEASUREDVALUEC2实际值C2ACTUALVALUEC1标称值C1NORMINALVALUEC2测量值C2MEASUREDVALUECC,THEEMPIRICALVALUEFORCALIBRATION,INCLUDESTHEEFFECTOFCNANDHIGHVOLTAGELINEFOREARTHCAPACITANCEITSVALUECOULDBE110PF图15CVT结构原理示意图FIGURE15STRUCTUREDIAGRAMOFCVTPRINCIPLE接载波装置JOINTCARRIERDEVICE分压电容PARTIALPRESSURECAPACITOR放电间隙DISCHARGEGAP4THEWIRINGOFSPECIMENWITHSMALLCAPACITORFORSMALLCAPACITORS,WHENTHEAIRHUMIDITYISLARGE,THEMEASUREDVALUEOFDIELECTRICLOSSWOULDBEABNORMALANDUNSTABLEASITSTGISIMPACTEDBYTHESURFACESTATEATTHISTIME,THESHIELDINGRINGCOULDBEADOPTEDFORABSORBINGTHELEAKAGECURRENTONTHESURFACEOFTHESPECIMENTHESHIELDINGELECTRODEISGROUNDEDWHENPOSITIVECONNECTEDANDISCONNECTEDTOTHESHIELDINGLAYEROFCXWHENNEGATIVECONNECTEDTHISMETHODMAYCHANGETHEDISTRIBUTIONOFELECTRICFIELDINTHEINTERNALEQUIPMENTUNDERTESTANDTHENAFFECTTHETGBOTHTHESTANDARDCAPACITORANDSTANDARDDIELECTRICLOSSTESTERADOPTTHISKINDOFCONNECTIONMETHOD5THECONNECTIONMETHODOFSOMEEQUIPMENTCANREFERTOSECTIONIX“REFERENCEOFCONNECTIONMETHODS“VIIPRECAUTIONS1THEINSTRUMENTISONLYUSEDONPOWEROFFEQUIPMENTTHEGROUNDINGTERMINALSHOULDBECONNECTEDTOTHEGROUNDINGNETWORKRELIABLYTHEINSTRUMENTSHOULDBEUSEDINSPACIOUS,SAFEANDRELIABLEPLACE2THEEQUIPMENTUNDERTESTISSHIFTEDTOTHEMAINTENANCESTATEIFTHEHIGHVOLTAGELEADISDISCONNECTEDFROMOPERATIONSTATEANDCOULDBECLEANEDTHEINSTRUMENTCOULDBETESTEDONLYAFTERGOODINITIALINSULATIONTESTSOASTOAVOIDTHEPOORINSULATIONOFEQUIPMENTUNDERTESTCAUSINGTHEDAMAGEOFTHEINSTRUMENTDURINGTHEPRESSINGPROCESS3THECONNECTIONMODESHOULDBEBASEDONTHEINSTALLATIONOFEQUIPMENTCORRESPONDINGCONNECTIONMODESHOULDBESELECTEDINTHEMENUOPTION4THETESTINGVOLTAGELEVELSHOULDBESELECTEDACCORDINGTODIFFERENTEQUIPMENTANDTHEDESIREDVOLTAGESHOULDBESELECTEDINTHECORRESPONDINGMENUOPTION5UNDERTHESPECIALCIRCUMSTANCESOFENDANGERINGSAFETYDURINGTHETESTING,THEMAINPOWERSUPPLYCOULDBESWITCHEDOFF6THECONNECTIONMODECOULDBECHANGEDORTHEWORKISDONEAFTERTHEPOWERSWITCHONTHEPANELISSWITCHEDOFFANDTHE220VTESTPOWERISDISCONNECTEDIFTHEEQUIPMENTNEEDSTOBERETESTED,YOUCANPRESSTHE“RESET”ORSELECTREPEATAFTERTHECOMPLETIONOFPREVIOUSTESTING7INORDERTOENSURETHEMEASUREMENTACCURACY,ITISVITALTOGUARANTEETHEGOODINSULATIONOFLOWVOLTAGETERMINALORSECONDARYTERMINALOFTHEEQUIPMENTANDITSHOULDBETESTEDINTHEENVIRONMENTWITHLOWRELATIVEHUMIDITYESPECIALLYIFTHESMALLLOSSOFSPECIMENWITHSMALLCAPACITANCE8WHENMAKINGTHETESTINGOFSPECIMENWITHLARGECAPACITANCE,THEGROUNDINGOFTHEINSTRUMENTANDTHESPECIMENSHOULDNOTBEINTHESAMEPLACETOPREVENTTHEREVERSEBREAKDOWNVOLTAGEORTRAVELINGWAVESWHICHMAYAFFECTTHESAFETYOFTHEINSTRUMENT9THESTEPUPDEVICEISAVAILABLEINTHEINSTRUMENTITISNECESSARYTOBECAREFULABOUTTHEINSULATIONDISTANCEOFHIGHVOLTAGELEADANDPERSONNELSAFETY10THEINSTRUMENTMUSTBEGROUNDEDRELIABLYPOORGROUNDINGMAYCAUSEDANGER11AFTERTHESTARTINGOFTHEINSTRUMENT,EXCEPTINSPECIALCIRCUMSTANCES,THEPOWERISNOTALLOWEDTOBETURNEDOFFSUDDENLYTOAVOIDTHEOVERVOLTAGEWHICHMAYDESTROYTHEEQUIPMENT12ALTHOUGHTHEHVXSPECIALHIGHVOLTAGEWIREEQUIPPEDWITHTHEINSTRUMENTISMADEFACTORYINSPECTION,ITSTILLSHOULDBEFARAWAYFROMHUMANBEINGSANDLOWVOLTAGETESTLINEBOTHTHEHIGHVOLTAGECOREANDHIGHVOLTAGESHIELDINGCABLEARENOTALLOWEDTOBEGROUNDEDANDCONTACTWITHTHELOWPOTENTIALOFTHETESTINGCIRCUITTHECOREANDSHIELDINGCABLEOFCXINPUTLINEARENOTALLOWEDTOCONTACTWITHPARTWITHHIGHVOLTAGE13THEINSTRUMENTSHOULDBEPROTECTEDFROMTHEMOISTUREANDEXCESSIVEVIBRATION14THEDIFFERENTFREQUENCYSHOULDBEADOPTEDFORMEASURINGIFTHERESULTCANNOTBEENTEREDMEASUREDBYWORKINGFREQUENCYWITHTOOMUCHINTERFERENCESOTHERWISE,WORKINGFREQUENCYSHOULDBEUSEDFORTHEMEASUREMENT15IFTHEMEASUREMENTRESULTCANNOTBESHOWNLONGTIME1MINAFTERSENDINGOUTTHEMEASUREMENTINSTRUCTION,ITMAYBECAUSEDBYLARGECAPACITANCEOFTHESPECIMENORCRASHINGOFTHEINSTRUMENTYOUNEEDTORESTARTTHEINSTRUMENT,REDUCETHEMEASUREMENTVOLTAGEANDMAKEMEASUREMENT16THEINSTRUMENTHASAUTOMATICPROTECTIONFEATUREIFITHASSHORTCIRCUIT17IFTHEPAPERISEXTENDEDOUTFROMTHEPAPERESCONTHETOPOFTHEPRINTER,YOUNEEDTOPRESSTHEBUTTONTOSTOPITTHEPRINTINGPAPERCOULDBEPULLEDOUTVIIIFULLSETOFINSTRUMENT1HOST12HIGHVOLTAGEHVXTESTCABLERED13CXSPECIFICTESTCABLEBLACK14LOWVOLTAGEOUTPUTTESTCABLEFORCVT,DUALCORE15220VPOWERLINE16GROUNDWIRE17INSTRUCTIONMANUAL18FACTORYCERTIFICATION19FUSE,PRINTINGPAPERFORSPARE10FACTORYINSPECTIONREPORT1IXREFERENCECONNECTIONMETHOD1VOLTAGETRANSFORMER（1）PRIMARYSIDETOSECONDARYSIDEASEEFIGURE6BVOLTAGE2KVCPOSITIVECONNECTION（2）PRIMARYSIDETOSECONDARYSIDEANDGROUNDASEEFIGURE7BVOLTAGE2KVCNEGATIVECONNECTION（3）SECONDARYSIDETOPRIMARYSIDEANDGROUNDASEEFIGURE8BVOLTAGE2KVCNEGATIVECONNECTION2CURRENTTRANSFORMER（1）PRIMARYSIDETOSECONDARYSIDEASEEFIGURE9BVOLTAGE10KVCPOSITIVECONNECTION（2）PRIMARYSIDETOENDSHIELDASEEFIGURE9CORECONNECTTOENDSHIELDBVOLTAGE10KVCPOSITIVECONNECTION（3）PRIMARYSIDETOSECONDARYSIDEANDGROUNDASEEFIGURE10BVOLTAGE10KVFIGU