... elect DW9A/B/C/D/E series 3 Phase Coulometer DW9A/B/C/D/E series 3 Phase Coulometermeasuring instrumentsspecificationFeatures:1) To measure ... 4) Isolation between input and output signal;5) True effective value measuring;6) Two alarm output for voltage, current, power ... active power, reactive power;7) Transformed analog output 4-20mA for voltage, current, active power, reactive power, frequency, power ...