... Three-phase Three-wire 3x100V or 3x380V 3, Rated Frequency(Hz):50,60 4,Accuracy class:class 1.o, class ... low power consumption, light weight etc 2,Measure three phase active electric energy, Do not need calibrate ... ),3x30(80),3x30(100)Rated Voltage(V) Three-phase four-wire 3×220/380V or 3 ... 380VRated Frequency(Hz): 50/60Hz Accuracy class 1 or 2 Three phase three wire electronic digital multi tariff kWh ...