1.CharacteristicsandRangeofapplication:ModelDTS791threephaseelectronicmeterisakindofnewstylethreephasewholeelectronictypemeter,andadoptuptodatemicro-electronicstechniqueandimportedspeciallargescaleintegratecircuit,useadvancedtechniqueofdigitalsamplingtechniqueandSMTtechnicsetc.ThemeterarecompletelyconformedtotherelativerequirementsoftheNationalStandardGB/T17215.321-2008andInternational StandardIEC1036onthemeter(Class1orClass2).Themeterisusedformeasuringactiveenergypowerconsumptioninaratedfrequencyof50Hzor60Hzthreephasealternatingcurrentcircuit.Itcanaccuratelyanddirectlymeasureactiveenergyconsumptionfrompositiveandreversedirections.Ithasfollowingfeatures:Goodreliability,smallvolume,lightweight,speciousniceappearance,advancedtechnics.Itcanchoosemanykindsofinstallationwayssuchas35mmDINstandardrail.Themeterisinstalledindoors.Thesiteconditionsshallbeassumedasfollows:Theambienttemperatureis–25~55℃,relativehumidityisnotmorethan95%.Thereisn’theavycorrosivegasoranyinfluenceofdust,moldandinsectsetc. 2.Basicspecificationsandmaintechnicalparameters:2.1SpecificationsNameModelClassofprecisionRatedvoltageUbRatedcurrent(A)3phase4WireactiveenergyelectronicmeterDTS7911220/380V57.5/100V5A/CT,3(15),5(30),10(50),15(90),20(100),5(40),5(100)2