1.single phase mechanical kilo watt-hour meter 2.Glass cover,steel base 3.Using life ... 4.4+1digital regis DMM28 (DD28) single phase mechanical kilo watt-hour meter is applicable to measure 50 Hz or 60 ... .5(5), 3(6), 5(10), 10(20), 20(40), 30(60), 40(80)0.5%IbAC Voltage 2kV for 1minute,1 ... waveform impulse voltage 6kV5(15), 5(20), 10(30), 10(40), 20(80), 30(100)*Please advise us if you have ...