... ISO9001,14001,IEC 4)OEM GeneralDDSI726 single-phase carrier electronic watt-hour meter is made by the advanced energy metering ... international advanced level,the performance indicators of this type of watt-hour meters comply with the technical requirements stipulated in IEC62053 ... energy test. Specifications Rated current (A)5(30),10(60),20(80)Rated voltage (V)220Rated frequency (Hz)50 or 60Accuracy ...