... -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 ... standard IEC521.Structure feature: ,,,,.The meter has separable electromagnet and the bearing has four kinds;single-jewel,magnetic thrust and magnetic ... 6kVAC voltage 2kV for 1 minute impulse voltage 6kV DD862 Kilo-Watt-Hour Meter,energy meter