... CE,CB,ISO9001,14001,IEC 4)OEM GeneralDDSI726 single-phase carrier electronic watt-hour meter is made by the advanced energy metering chips ... level,the performance indicators of this type of watt-hour meters comply with the technical requirements stipulated in IEC62053 Staticwatt-hour ... , can protect the internal data of the watt-hour meters;2.4 Possess the pulse output functions for electricity energy ...