... , Kwh, 4 quadrant energy, etc. Total 28 elect DW9A/B/C/D/E series 3 Phase Coulometer DW9A/B/C/ ... D/E series 3 Phase Coulometermeasuring instrumentsspecificationFeatures:1) To measure ... : voltage, current, active power, reactive power, power factor, frequency, Kwh, 4 quadrant energy, ...