... appearance,convenient inst smart meter ,watt hour meter,meter power OM75SF single phase electronic multi-rate watt- ... is a kind of new style single phase electronic multi-rate watt-hour meter.energy data ... be distinguished automatically,accident is checked automatically.5.Infrared carrier wave communication and RS485 serial port communication ... )A,15(90)A,20(100)A,5(40)A,5(100)A0.4%lbAC voltage 2kVfor ...