... -4 single phase watt-hours meter For exported goods Application:DD862,DD862-4 50Hz,.,GB/T15283-1994IEC521.hour meter is a ... kind of induction meter.which is applicable to measure ... and lntermational standard IEC521.Structure feature: ,,,,.The meter has separable electromagnet and the bearing has four ... DD862,DD862-4 :2(4),2.5(5),3(6),5(10),10(20),20(40),30 ...