I.Instrumentoverview
Dielectriclossmeasurementisaverybasicmethodintheinsulationtest,whichcan
effectivelyfindtheoveralldampdeteriorationanddeteriorationoftheinsulationof
electricalequipment,aswellaslocaldefects.Itiswidelyusedinelectrical
manufacturing,electricalequipmentinstallation,handoverandpreventivetesting.The
measurementofdielectriclossoftransformers,transformers,reactors,capacitors,
bushings,lightningarresters,etc.isthemostbasicmethodtomeasuretheirinsulation
performance.Thedielectriclosstesterbreaksthroughthetraditionalbridge
measurementmethod,adoptsvariablefrequencypowersupplytechnology,uses
single-chipmicrocomputerandmodernelectronictechnologytoperformautomatic
frequencyconversion,analog/digitalconversionanddatacalculation;achievesstrong
anti-interferenceability,fasttestspeed,andhighprecision,Fullyautomaticdigitization,
simpleoperation;powersupplyadoptshigh-powerswitchingpowersupply,output45Hz
and55Hzpuresinewave,automaticallypressurize,canprovideupto10kVvoltage;
automaticallyfilter50Hzinterference,suitableforsubstationsandotherlarge
electromagneticinterferencetestingonthespot.Itiswidelyusedinthedielectricloss
measurementoftransformers,transformers,bushings,capacitors,arrestersandother
equipmentinthepowerindustry.
II.Performancecharacteristics
1.TheinstrumentusesFouriertransformdigitalfilteringtechnologytomeasure
capacitance,dielectriclossandotherparameters.Thetestresulthashighaccuracy,
whichisconvenientforautomaticmeasurement.
2.Theinstrumentusesfrequencyconversiontechnologytoeliminateon-site50Hzpower
frequencyinterference,andreliabledatacanbemeasuredeveninanenvironmentwith
strongelectromagneticinterference.
3.Usingafull-touchlargeLCDdisplay,easytooperate.FulltouchLCDscreen,super
largegraphicoperationinterface,eachprocessisveryclearandclear,theoperatorcan
useitwithoutadditionalprofessionaltraining,andthewholeprocesscanbemeasured
withalighttouch.
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4.Storedata:Theinternalisequippedwithacalendarchipandalarge-capacitymemory,
whichcansavethetestresultsatanytime,viewthehistoricalrecordsatanytime,and
printout.Thecurrenttimeandstoragetimecanbedisplayedandprintedatanytime.
5.Scientificandadvanceddatamanagement:Theinstrumentdatacanbeexported
throughUdisk,andthedatacanbeviewedandmanagedonanyPCthroughspecial
software.
6.Theinstrumentiseasytooperate,andthemeasurementprocessiscontrolledbythe
microprocessor.Aslongastheappropriatemeasurementmethodisselected,thedata
measurementcanbeautomaticallycompletedunderthecontrolofthemicroprocessor.
7.Integratedmodelwithstandardcapacitorandhigh-voltagepowersupply,whichis
convenientforon-sitetestingandreduceson-sitewiring.
8.Theinstrumenthashighmeasurementaccuracyandcanmeettherequirementsofoil
dielectriclossmeasurement.Therefore,itonlyneedstobeequippedwithastandardoil
cupandaspecialtestlinetoachieveoildielectriclossmeasurement.
9.Withreversewiringlow-voltageshieldingfunction,whenthe220kVCVTbusis
grounded,thedielectriclossof10kVreversewiringcanbemeasuredforC11without
disconnectingthewiring.
10.AbletodoACwithstandvoltagetest.ItisconvenientforPT,CTtodoACwithstand
voltagetwice,andfor400Vlowvoltagesystemtodowithstandvoltagetest.
11.Itcanidentifythefrequencyoftheexternalhigh-voltagepowersupplyfrom40Hzto
70Hz,andallowstheuseofindustrialfrequencypowersupplyorseriesresonantpower
supplyforlarge-capacityhigh-voltagedielectriclosstest.
12.WithCVTtestfunction,itcanrealizetheself-excitationmethodtestofCVT,andcan
set4protectionlimitsofhighvoltage/currentandlowvoltage/currenttoensurethesafety
ofpeopleandequipment.
13.WhentestingCVT,itcannotonlyautomaticallytestthecapacitancevalueand
dielectriclossvalueofC1andC2,butalsotestthetotalcapacitanceanddielectricloss
valueofCVTequipment
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14.WithCVTratiomeasurementfunction.ItcanmeasureCVTratio,polarityandphase
error.
15.Withfour-channelsimultaneousmeasurementfunction,itisconvenienttotestthe
three-phaseandneutralpointbushingsofthetransformer.
16.Thebuilt-inthermalprintercanprintout,withacalendarclock,itisconvenientfor
userstowritetestreports,andithasaUdiskoutput.
17.Withcomputerinterface.Acomputercancontrol32instruments,whichcanbe
integratedintoacomprehensivehigh-voltagetestvehicletorealizemeasurement,data
processingandreportoutput.
18.Groundingprotectionfunction.Whentheinstrumentisnotgroundedorthegrounding
ispoor,theinstrumentwillnotenterthenormalprogramandwillnotoutputhighvoltage.
Over-currentprotectionfunction,theinstrumentwillnotbedamagedwhenthesampleis
short-circuitedorbrokendown.
19.Electricshockprotectionfunction.Whentheoperatoroftheinstrumentaccidentally
getsanelectricshock,theinstrumentwillimmediatelycutoffthehighvoltagetoensure
thesafetyofthetestpersonnel.
20.WithGPSglobalpositioningsystem,canprovidethetestlocationoftheinstrument
(optional).
III.Technicalindicators
Accuracy:Cx:±(reading×1%+1pF)
tgδ:±(reading×1%+0.00040)
Anti-interferenceindex:frequencyconversionanti-interference,theaboveaccuracycan
stillbeachievedunder200%interference
Capacityrange:
Internalhighvoltage:3pF~60000pF/10kV60pF~1μF/0.5kV
Externalhighvoltage:3pF~1.5μF/10kV60pF~30μF/0.5kV
Resolution:upto0.001pF,4significantdigits
Rangeoftgδ:Unlimited,resolution0.001%,threekindsoftestsamplesofcapacitance,
inductanceandresistanceareautomaticallyidentified.
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Testcurrentrange:10μA~5A
Internalhighvoltage:setvoltagerange:0.5~10kV(12kVcanbecustomized)
Maximumoutputcurrent:200mA
Buck-boostmode:voltagecanbesetatwill.Forexample,5123V.
Testfrequency:40-70Hzsinglefrequencycanbesetatwill.Forexample,48.7Hz
50±0.1Hzto50±10Hzautomaticdoublefrequencyconversioncanbesetatwill.
60±0.1Hzto60±10Hzautomaticdoublefrequencyconversioncanbesetatwill.
Frequencyaccuracy:±0.01Hz
Highvoltageappliedexternally:themaximumtestcurrentis5Aduringthepositive
connection,powerfrequencyorfrequencyconversion40-70Hz
Maximumtestcurrentwhenreversewiringis10kV/5A,powerfrequencyorfrequency
conversion40-70Hz
CVTself-excitedlowvoltageoutput:outputvoltage3~50V,outputcurrent3~30A
CVTratiomeasurement:
Transformationratiomeasurementaccuracy:±reading×1%Transformationratio
measurementrange:10~99999
Phasemeasurementaccuracy:±0.1°Phasemeasurementrange:0~359.9°
Measuringtime:about40s,relatedtothemeasuringmethod
Inputpower:180V~270VAC,50Hz±1%,powersupplyfrommainsorgenerator
Computerinterface:standardRS232interface,Udisksocket(automaticUdiskstorage
data).
Printer:Thermalmicroprinter
Environmenttemperature:-10℃~50℃
Relativehumidity:<90%
Dimensions:500mm*377mm*330mm
Instrumentweight:28kg