DD862,DD862-4 single phase watt-hours meter For exported goods Application:DD862,DD862-4 50Hz,.,GB/T15283-1994IEC521.hour meter is a kind of induction ... ;single-jewel,magnetic thrust and magnetic floating.The case has three kinds;aluminum,plastic and glass.The die-casting frame is ... voltage 2kV for 1 minute impulse voltage 6kV DD862 Kilo-Watt-Hour Meter,energy meter