... applicable to measure the rated frequency 50HZ and power loss of active and reactive energy meter.The series active energy meters are completely ... of alloy aluminum,to assure the magnetic line standly and reliably-Meter bearing has three kinds,may select dual jewel,magnetic ... 5 kinds of cases:Bakelite,PC,ABS plastic,glass and Aluminum.3.Main Technical datas4.More Picture: Three-Phase Power Meter DS862