... appearance 5.IEC62053-21 ApplicationDDS5168 single phase two wire active electronic watt-hour meter, cyclometer display.The meter is used to measure 50Hz ... of pulse output passive (polarity), may select increase a distant port of pulse output passive(nonpolarity),complying ... V)110,120,220,230,240,etc.Rated current(A)1.5(6), 2.5(10), 5(20 ... ), 10(40)A,15(60), 20(80), 30(100),etc.Operation ...