DDS228 einphasigen elektronischen Zähler

DDS228 single phase electronic meterwith RS485 communication 1 Application It appliestotheworkingconditionsofactivemeasureof50Hzor60Hzfrequencies, usefor the-40'C +50'Cenvironmentaltemperatureandthehumiditynotmorethan85%. Thiselectricmeteradoptsmicroelectronictechnologytomeasurethepower.Itgetsthevoltagesamplingsignalsfromthevoltagedividerandgetsthecurrentsignalsfromthecurrentdivider,thengetsthecurrent&voltagesignalsfromthemultiplierandthroughfrequencyconversionproduceacountingpulseinwhichthefrequencyisindirectratiowiththevoltagecurrentproduct.Thenthecounterisdrivenbyfrequencydividingsteppingmotortomeasurethepower.Theelectricmeterappliesfullscreenandfullsealedstructure.Ithasthefeaturesofsatisfactoryelectromagneticresistancefunction,lowselfconsumptionandpowersaving,highprecisionpreventstealing,highoverloadandlongservicetime etc.Infrared and RS485 communication function,convenientread meterconsumption.ItsfunctionindexarecompletelyconformedtoCE and ISO9001-2000 standards andinternationstandardIEC62053-21.2 working principle and structure diagram3 Basic errorOverloadcurrent Powerfactor COSφ Basiclimiterror(%) 1.0 2.0 0.05Ib 1.0 ±1.5 ±2.5 0.1Ib-Imax 1.0 ±1.0 ±2.0 0.1Ib 0.5(sensibility) 0.8(capacity) ±1.5 ±2.5 0.2Ib-Imax 0.5(asiclimiterror) 0.8(capacity) ±1.0 ±2.0 4 Specification typerated voltagerated currentaccuracydisplayDDS228220V2.5(10)A 5(20)A 10(40)A 15(60)A 20(80)A 30(100)AClass 1.0LCD display5