... , current, active power, reactive power, power factor, frequency, Kwh, 4 quadrant energy, etc. Total 28 elect DW9A/B/C/D/E ... , current, active power, reactive power, power factor, frequency, Kwh, 4 quadrant energy, etc. Total 28 electrical parameters;2) 3 lines 4 ... 4-20mA for voltage, current, active power, reactive power, frequency, power factor;8) With RS485 communication function (Modbus RTU protocol ...