... overload, low power consumption, light weight etc 2,Measure three phase active electric energy, Do not need calibrate for long term operation 3 ... ,Three phase power supply, Loss one(any one wire of three wire) ... reactive electric quantity Rated Current(A) 3x1.5(6),3x5(20),3x10(40),3x15(60),3x30(80),3x30(100)Rated Voltage(V) Three-phase ...