... energy, etc. Total 28 elect DW9A/B/C/D/E series 3 Phase Coulometer DW9A/B/C/D/E series 3 Phase Coulometermeasuring ... signal;5) True effective value measuring;6) 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 ...