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FTVOGUE Multi Function Three Phase Programmable Power Meter Electric Digital LED Ammeter Voltmeter,Electric Energy and Measuring Instruments homepage wrinkle-resistantFTVOGUE Multi Function Three Phase Programmable Power Meter Electric Digital LED Ammeter Voltmeter,Electric Energy and Measuring Instruments Product Features Multi function power meter measurement for three phase voltage, current, active power, reactive power, power factor, grid frequency, active energy and reactive energy. The can be directly input from the current and voltage and the input parameter ratio can be set by virtue of field