... Model Descriptions for FunctionsNoteYD2080Three-phase voltage, frequency in one circuit, each phase current, power, power factor, ... split-type transformerYD2080-2KThree-phase voltage, frequency in one circuit, each phase current, power, power factor ... split-type transformerYD2080-4KThree-phase voltage, frequency in one circuit, each phase current, power, power factor ... or ≤2W multi-channels power meter