DX904 type three-phase four-wire reactive watt-hour meter is the abroad advanced technology, to design and development of a new generation of three-phase watt-hour meter long life technology, used for measuring and frequency than for 50 Hz ac ac reactive

DX904 type three-phase four-wire reactive watt-hour meter is the abroad advanced technology, to design and development of a new generation of three-phase watt-hour meter long life technology, used for measuring and frequency than for 50 Hz ac ac reactive