SFDBE Series Multifunctional Network Power Instrument This series meter has all the functions of ... electrical parameters including of three-phase voltage,three-phase current,active power,reactive power,apparent power,frequency,power factor and 4 ... ,5AFrequency range:45~65HZ Input network:3-phase3-wire,3-phase4-wireAccuracy of measurement:voltage,current,active power.reactive power,apparent power ...