... .easy to use 3.200r/KWH 3 phase watt meter1.heat resistance2.easy to use3.200r/KWHApplicationThree-phase watt-hour meter ... that of inductance type, used for measuring three-phase AC activeor reactive energy of reference frequency 50Hz or ... DT862, DT864, DS862 and DS864 series are the three-phase active energy watt -hour meters, and DX862, DX864, ... and 45~65Hz at AC voltage for 1min. 3 phase watt meter