... 3)CE,CB,ISO9001,14001,IEC 4)OEM D86 Three-phase In-build Watt-hour MeterCNC, Changcheng- China Famous ... three-phase watt-hour meter is a induction meter, which is applicable to measure the rated frequency 50Hzand power ... line stably and reliably.2.3 Meter bearing has three kinds, may select dual jewel, magnetic thrust ... )Input through current voltage transformer D86 Three-phase In-build Watt-hour Meter