... , power, power factor, Hz, kWh, kvarh, harmonics 2. RS485/Modbus Electronic Power Meter Features:1. Suit for LV/ HV voltage system2 ... , easy to install9. Panel size: 96 x 96mm10. Password protect Electronic Power Meter Basic Function:Provide one RS485 communication, measures and ... %Frequency0.01Active energy1.0%Reactive energy2.0%Harmonic1.0%Un-balance rate1.0%