... base 3.Using life more than 10 years 4.4+1digital regis DMM28 (DD28) single phase mechanical kilo watt-hour meter ... , 230V, 240V2(4), 2.5(5), 3(6), 5(10), 10(20), 20(40), 30(60), 40(80)0.5%IbAC ... 50 μs waveform impulse voltage 6kV5(15), 5(20), 10(30), 10(40), 20(80), 30(100)*Please advise us if ... we can make according to your special requirements. DTS726, DSS226 Three-phase Electronic Watt-hour Meter