DDSY523 Three Phase Active Kilo Watt-Hour Meter(KWH meter/Energy meter) is new generation intelligent energy meter which adopts advanced static integrated technology and SMT craft. The products accord with class 1.0 static AC active the phase energy meter of IEC 1063 standard as well. It has the feature of advance principal, simple structure, high accuracy and sensitivity, high reliability, anti-power theft strong overload and so on.