... following features:1) To measure: voltage, current, active power, reactive power, power factor, frequency, Kwh, 4 quadrant energy, etc. ... ) Two alarm output for voltage, current, power factor, active power, reactive power;7) Transformed analog output 4-20mA for ... voltage, current, active power, reactive power, frequency, power factor;8) With RS485 communication function (Modbus RTU ...