... DW9L series 3 phase multi-function power meter with following features:1) To measure: Voltage, Current, Active Power, Reactive Power, Power Factor, Frequency ... 5) True effective value measuring;6) Two alarm output for Voltage, Current, Power Factor, Active Power, Reactive Power;7 ... 10SConsumption of voltage <1VA (each phase)Voltage imdepance ≥ 300K Ω Voltage accuracy RMS measure, accuracy class 0.5Rated ...