DT902 type three-phase four-wire meritorious electric energy 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

DT902 type three-phase four-wire meritorious electric energy 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 active