three phase energy meter 1.good quality 2.long life using 3.No-combustible plastic material three phase energy meter1.good quality2.long ... -combustible plastic materialApplicationThree-phase watt-hour meter is that of inductance type, used for measuring three-phase AC activeor reactive ... , DT864, DS862 and DS864 series are the three-phase active energy watt -hour meters, and DX862, DX864, DX865 and ...