... Model Descriptions for FunctionsNoteYD2080Three-phase voltage, frequency in one circuit, each phase current, power, power factor, energy in three circuits, ... 2KThree-phase voltage, frequency in one circuit, each phase current, power, power factor, energy in two circuits, with 3DI ... 4KThree-phase voltage, frequency in one circuit, each phase current, power, power factor, energy in four circuits, with 3DI ...