... 4 50Hz,.,GB/T15283-1994IEC521.hour meter is a kind of induction meter.which is applicable to measure ... 1994 and lntermational standard IEC521.Structure feature: ,,,,.The meter has separable electromagnet and the bearing has four kinds ... ;single-jewel,magnetic thrust and magnetic floating.The case has three kinds;aluminum,plastic and glass.The ... impulse voltage 6kV DD862 Kilo-Watt-Hour Meter,energy meter