... YD2080-2Three-phase voltage, frequency in one circuit, each phase current, power, power factor, energy in two circuits, with 3DI+1DO. ... YD2080-4hree-phase voltage, frequency in one circuit, each phase current, ... circuit, each phase current, power, power factor, energy in two circuits, with 3DI+1DO.With split-type transformerYD2080-4KThree ...