ctsr series(lem的电流互感器).doc

ctsr series(lem的电流互感器) Page1/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2Current TransducerCTSR seriesI PRN=300,600mARef:CTSR0.3-P,CTSR0.6-PFor theelectronic measurementof current:DC,AC,pulsed.,with galvanicisolation betweenthe primary(high power)and the secondary circuit(electronic circuit).FeaturesClosed loop(pensated)current transducerVoltage outputSingle supplyvoltageIsolated plastiase materialrecognized aording to UL94-V0PCB mounting.AdvantagesHigh auracyVery lowoffset driftover temperatureWide aperture(20.1mm)High overloadcapabilityHigh isolationcapabilityReference pinwith two modes,Ref Inand Ref OutDegauss andtest functions.ApplicationsResidual current measurementLeakage currentmeasurement intransformerless PVinvertersFirst humancontact protection of PVarraysFailure detection in powersourcesSymmetrical faultdetection(e.g.after motorinverter)Leakage currentdetectioninstacked DCsourcesSingle phaseor threephase nominal currentmeasurementup to30A perwire(DC or AC).StandardsEN50178IEC61010-1(safety).Application DomainIndustrialSuitable tofulf il VDE0126-1-1and UL1741.Page2/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesAbsolutemaximum ratingsStressesabove theseratings maycause permanentdamage.Exposure to absolute maximumratings forextended periodsmay degradereliability.Isolation characteristicsEnvironmentaland mechanicalcharacteristicsParameter SymbolUnit ValueSupply voltage V C V7Primary conductortemperatureC110Impulse overload(100?s,500A/?s)A3300Parameter SymbolUnit ValueCommentRMS voltagefor ACisolation test50/60Hz/1min Vd kV5.4Impulse withstandvoltage1.2/50?sV wkV10.1Partial dischargeextinction voltage10pC(rms)V ekV1.65Clearance distance(pri.-sec.)dCI mm11Shortest distancethrough airCreepagedistance(pri.-sec.)dCp mm11Shortest pathalong devicebodyComparative trackingindex CTIV600Application example-1000V CATIII PD2Basic isolation,non uniformfi eldaording toEN50178Application example-600V CATIII PD3Basic isolation,non uniformfi eldaordingtoEN50178,IEC61010Aording toUL508:primary potentialinvolved inVolt rmsAC orDC-V600For usein apollution degree3environmentPrimary conductorshall beconnected afteran overvoltagedevice orsystem evaluatedby standardUL1449.Parameter SymbolUnit MinTyp MaxCommentAmbient operatingtemperature T AC-40105Ambient storagetemperature TSC-50105Mass mg28Standards EN50178,IEC61010-1,UL508Page3/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesElectricaldata CTSR0.3-PAt T A=25C,V C=+5V,output voltagereferred toV REFunless otherwisenoted.Notes:1)See“Application information”section.2)Only with a primary nominal residual current,see paragraph“Primary nominal residual current and primary nominal curent”.3)AuracyTA andI P:X TA=(X2+(TCG?100?(TA-25)2+(TCVOE?2.5?(TA-25)/Gth?100/I P)2)1/2Parameter SymbolUnit MinTyp MaxCommentPrimary nominal residualcurrent rmsI PRNmA300Primary residualcurrent,measuring rangeI PRMmA-500500Supply voltageV CV4.7555.25Current consumptionI CmA1617.521.6+I P(mA)/N SWith N S=1000turns-40C.105CReference voltageI P=0V REF V2.4952.52.505Internal referenceExternalreference voltageV REF V2.34Internal resistanceof V REF input=499?Note1Electrical offsetcurrent referred to primary(Note2)I OEmA-24+724Temperature coeffi cientof V OEI P=0TCV OEppm/K50570ppm/K of2.5V-40C.105CTheoretical sensitivityGth V/A4Sensitivity error(Note2)G%-1.60.51.6R L500k?Temperature coeffi cientof GTCG ppm/K230-40C.85C400-40C.105CLinearity errorL%of I PRM0.51Reaction time10%of I PRN tra?s7R L500k?,di/dt5A/?sResponse time90%of I PRN tr?s50R L500k?,di/dt5A/?sFrequency bandwidth(-1dB)BW kHz3.5R L500k?Output voltagenoise(1Hz.10kHz)V nomV rms6R L500k?Magic offsetcurrent referred to primary(1000x I PRN)I OMmA17Auracy(Note3)X%1.9=(G2+L2)1/2Output voltagereferred toGND(during Degausscycle)V0.30.5Note1Output voltagereferred toV REF(Test current)VV OE+0.7V OE+1.2V OE+1.7Note1Page4/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesTypicalperformance characteristicsCTSR0.3-PFigure1:Frequency responseFigure2:Output noise,spectral densityFigure3:Output noise,cumulated rmsFigure4:Typical stepresponse Figure5:Typical stepresponseRelative sensitivity(dB)Phase()Frequency(Hz)Page5/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesElectricaldata CTSR0.6-PAt TA=25C,V C=+5V,output voltagereferred toV REFunless otherwisenoted.Notes:1)See“Application information”section.2)Only with a primary nominal residualcurrent,see paragraph“Primarynominal residualcurrentand primarynominal curent”.3)AuracyTA andI P:X TA=(X2+(TCG?100?(TA-25)2+(TCVOE?2.5?(TA-25)/Gth?100/I P)2)1/2Parameter SymbolUnit MinTyp MaxCommentPrimarynominal residualcurrent rmsI PRNmA600Primary residualcurrent,measuring rangeI PRMmA-850850SupplyvoltageVCV4.7555.25Current consumptionI CmA1617.521.6+I P(mA)/NSWith NS=1000turns-40C.105CReference voltageI P=0V REFV2.4952.52.505Internal referenceExternalreference voltageV REFV2.34Internal resistanceof VREF input=499?Note1Electrical offsetcurrent referredto primary(Note2)I OEmA-244.224Temperature coeffi cientof V OEI P=0TCV OEppm/K60520ppm/K of2.5V-40C.105CTheoretical sensitivityGth V/A2.476Sensitivity error(Note2)G%-0.20.30.7R L500k?Temperature coeffi cientof GTCG ppm/K100-40C.105CLinearity errorL%of I PRM0.41.3Reaction time10%of I PRN tra?s5R L500k?,di/dt5A/?sResponse time90%of I PRN tr?s30R L500k?,di/dt5A/?sFrequency bandwidth(-1dB)BW kHz9.5R L500k?Output voltagenoise(1Hz.10kHz)V nomV rms4R L500k?Magic offsetcurrent referredto primary(1000x I PRN)I OMmA17Auracy(Note3)X%1.5=(G2+L2)1/2Output voltagereferredtoGND(during Degausscycle)V0.30.5Note1Output voltagereferredtoVREF(Test current)VV OE+0.4VOE+0.75VOE+1.1Note1Page6/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesTypicalperformance characteristicsCTSR0.6-PFigure6:Frequency responseFigure7:Output noise,spectral densityFigure8:Output noise,cumulated rmsFigure9:Typical stepresponse Figure10:Typical stepresponseFrequency(Hz)Phase()Relative sensitivity(dB)100101102103104105-110-105-100-95-90-85-80-75-70-65-60f(Hz)v n(dBVrms/rtHz)Noise voltagespectral densityof VMDevice:CTSR0.6-P#05-6110010110210310410510-610-510-410-310-210-1f c(Hz)V n(V)Cumulated RMSnoise voltageof VMDevice:CTSR0.6-P#05-61Page7/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesApplicationinformationFiltering,decoupling CTSR transducerSupply voltageVc(5V):The CTSR transducers haveinternal decoupling capacitors,but in the case of apower supplytrack on the applicationPCB havinga highimpedance,it is advised toprovide localdecoupling,100nF ormore,located closeto the transducer.Reference Vref:Ripple presenton the Vref pincan befi lteredwithalow valueof capacitancebecause of the internal499ohm seriesresistance.The CTSRtransducers havean internalcapacitor of22nF betweenVref pin and Gndpinand the maximumfi ltercapacitance valuewhich could be addedis1?F.Adding alarger decouplingcapacitor willincrease theactivation delayof degauss.Output Vout:The CTSRtransducers havean internallow passfi lter470ohm/22nF;if adecouplingcapacitoris addedon Voutpin,the bandwidthand theresponse timewill beaffected.In caseof shortcircuit,the transducerCTSR cansource orsink up toamaximum of10mA on its outputVout.Using an external reference voltageIf theVref pin of the transducer isnot usedit couldbe eitherleft unconnectedor filtered aordingto theprevious paragraph“Reference Vref”.The Vref pin hastwomodesRef Outand Ref In:?In theRefOutmode the2.5V internalprecision reference is used by the transducer as the reference point forbipolar measurements;this internalreferenceis connected to theVref pinof the transducerthrough a499ohms resistor.It toleratessink orsource currentsupto5mA,but the499ohms resistorprevents thiscurrent toexceed theselimits.?In theRefInmode,anexternal reference voltageisconnectedto theVref pin;this voltageis specifi edin therange2.3to4V andis directlyusedbythetransducerasthereferencepointfor measurements.The externalreferencevoltageVref must be able:o eitherto sourcea typicalcurrent of,the maximumvalue willbe3mA whenVref=4V.o orto sinka typicalcurrent of,the maximumvalue willbe0.4mA whenVref=2.3V.The followinggraphs showhow themeasuring rangeof thetransducer dependsontheexternalreferencevoltage valueVref(Vc=5V).Upper limit:IP=500mA(Vref=2.3.2.625V)Upper limit:IP=850mA(Vref=2.3.2.52V)Upper limit:IP=-363.5*Vref+1454.25(Vref=2.625.4V)Upper limit:IP=-574.3*Vref+2297.5(Vref=2.52.4V)Lower limit:IP=-210.6*Vref+0.092(Vref=2.3.2.375V)Lower limit:IP=-342.9*Vref+0.148(Vref=2.3.2.48V)Lower limit:IP=-500mA(Vref=2.375.4V)Lower limit:IP=-850mA(Vref=2.48.4V)4995.2Vref?4995.2?Vref-600-400-2000xx00600234VREF(V)I PRM(mA)I PRM500mA-1000-800-600-400-2000xx006008001000234VREF(V)I PRM(mA)I PRM850mAPage8/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesPrimarynominalresidualcurrentandprimarynominalcurrentThe primarynominalresidualcurrent is the sumof theinstantaneous valuesof allcurrents flowing throughthe apertureof thetransducer.The primarynominalcurrentisthecurrent flowing throughany conductorplaced into the apertureof thetransducer.The presenceof a primarynominalcurrent DCorACleads toan additionaluncertainty.For example,withaprimarynominalcurrent of30A theuncertainty referredto primaryis3.6mA.CTSRtransducerin Test modeWhen theVrefpinis forcedat aLow levelvoltage between0and1V andis maintainedat thislevel,the outputvoltage Voutof CTSRtransducer exhibitsa fixed value(see specifi cation)as ifit measuredaprimarytest current.The activationtime oftest modeis min30ms.The CTSRtransducer canbe maintainedin testmode aslong asneeded forchecking thatit isfully operating.CTSRtransducerin DegaussmodeThe CTSRtransducers goin degaussmode automaticallyat each power onor ondemand byusing theVrefpin.At poweron:A degaussis automaticallygenerated ateachpoweronofthe CTSRtransducer;during degaussingthe outputvoltage Voutis maintainedat0.3V typ.(max0.5V).After c.a.110ms,the outputvoltage Voutis releasedand takesthe normaloperation levelin relationwith themeasured primarycurrent.Using Vrefpin:When thepin Vrefis releasedfrom theLow levelvoltage defi nedintheTestmodeabove,there isa risingedge onVref whichgenerates anautomatic degauss.The activationof degausstakes typically40?s afterreleasing Vrefpin,then degausslasts typically110ms.Isolation aroundthe CTSRtransducer housingDueto thejoint betweenthe caseandthecover ofthe CTSRtransducer,there issome isolationdistance torespect whenprimary conductorspass aroundthe CTSRhousing.The figure belowshows thejoint andthe apertureswhere theclearance betweenthesecondarypart insidethe CTSRtransducer andthe surfaceofthe housing is3mm(label E).Page9/10LEM reservesthe rightto carryout modifi cationson itstransducers,in orderto improvethem,without priornotice.lem.22Junexx/Version2CTSR seriesPCBFootprint CTSR seriesAssembly onPCB?Remended PCBhole diameter1.2mm forsecondary pin2mm forretention pin?Maximum PCBthickness2.4mm?Wave solderingprof ile maxim