... Power meter 1. Measure: voltage, current, power, power consumption, power factor, frequency,active energy 2. Three phase 1.Features of DW9 three phase power ... , current, power, power consumption, power factor, frequency, active energy, reactive energy.- Current and voltage ratios set freely. - ... - With analog 4~20mA output. - With RS485 communiation interface, modubus RTU protocol. - Power supply ...