... RS485 communication 4. CE, ISO Toky DW9L series 3 phase multi-function power meter:1) To measure: Voltage, Current, Active Power, Reactive ... —PFa, PFb, PFc, ∑PF6. Frequency7. Active energy—kWh8. Reactive energy– kvarh Connection3 Phase 3 Wires, 3 Phase 4 WiresRated voltage valueAC 50-260V ... 100--240V (85--265V)Power supply consumption≤7VA DW9L 3 Phase Digital Active Power Meter / Smart Energy Meter