... Intelligent digital instrument be used in electricity grids , automation control system to measure voltage ,current ,active power, ... three-wire,three-phase four-wireRated voltageAC57.7V ,AC 100V,AC220V,AC380VRated currentAC1A ,AC5AOverloadVoltage:1.2 times ... 83Any function combination2211√ 45*45 25.SINGLE-PHASE AC DC COMBINATION METER ModelDisplay ModeFace Frame SizeHole SizemmmmRH-UI11Single ...