... Voltage(V):Three-phase four-wire 3x220/380V or 3x57.7/100V Three-phase Three-wire 3x100V or 3x380V 3, Rated Frequency(Hz):50,60 4,Accuracy ... measure and electricity stealing proof,high accuracy, high reliability, high overload, low power consumption, light weight etc 2,Measure three phase active electric energy, Do not ...