最新光CT原理PPT幻灯片.ppt

《最新光CT原理PPT幻灯片.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、光CT原理PPTContentIntroductionNXCTOpticalCTSensorsBetterSolutionstoyourProblemsToday’stechnicalspecsandstandardsbasedonoil-filledinstrumenttransformers.WithDigitalInstrumentTransformersensors,obviousfactslikeratio,burden,costevaluation,ormountingarrangementcanbereconsideredOurD

2、ITproposeanewandwiderrangeofsolutions,withanaccumulationratherthanaselectionofadvantages.Morefunctionsthanbefore.AREVACurrentSensorNXCTDigitalCurrentSensorsNXCTSystemComponents3currentsensorsPowersupply&lifierchassis(2U)Sensorchassis(3U)CablemanagementboxFeedercables

3、(inconduit)Splicebox(backofrack)6analogoutputs-either1Aor5A(meteringonly)or200mVTrunkcables(buried)DigitalCurrentSensorsWhydigitalSecondaryLoadsAnalogMeteringMoststandardslimitaccuracytomax.120%or200%ratedcurrent.Secondary1Anominal=>1.2Ato2AmaxAnalogProtectionCommonprote

4、ctionclassesrequireoutputupto20-30xratedcurrentSecondary1Anominal20Ato30AmaxUnlikeconventionalITs,digitalsensorsdelivernocurrentorpowertofeedsecondaryloads.Powerisdrawnfromsubstationbatteries.OKforhighlevelanalogmetering,butprotectionrequireslowlevelanalog(0.2V)ordigital

5、inputrelays2A20AOKNODigitalCurrentSensorsScaleFactorAdjustmentRatiochangeNXCTDigitalCurrentSensorsMaincharacteristics36kVto1200kVAC25kVto800kVDCWidedynamicrange<1Ato4000A(metering)Upto108kApeak(protection)FrequencyBandwidthDCto6kHZ(upto20kHzforspecialrequests)LongTermStabi

6、lityMeasurementCanada,NYISO,CAISO,LAPEM,andRussianCertificationformetering.Outdooroperatingtemperatures-40°Cto55°C(-40°Fto131°F)Computeraccesstoextensivediagnosticfunctions.Shortleadtimes16weeksfromtimeoforder.Programmablescalefactor(updatescanbemadeatinstallation)Otherrati

7、ngsareavailableuponrequestComparingTechnologiesCT245kVDigitalCT*HairPinTop-CoreWeight±65kg1400kg720kg144lbs3100lbs1600lbsLightweightdesign*Mergingunitinrelaybuildingincluded(equiv.±kg/lbsperphase)ConventionalCurrentTransformers3ConventionalCTsExample:2metering+4protectionfu

8、nctions/phase36cables6-10mm2M2R1R2R3R4M1RelayBuildingFieldM2DigitalCurrent