... Voltage Meter Performance feature High-precision measurement of Single -phase grid active power, reactive power, apparent power Provide digital ... .5 Class0.5 Class0.5 ClassSingle-phase,Three-phase four-wire, three-phase three-wireAC57.7V,AC100V,AC220V,AC380VAC1A, ... (continuous), 10 times/5 seconds (instantaneous)Voltager <1VA/phase phase,Current <0.4VA/phaseVoltager >300KΩ,Current <20mΩ45~65HzAC ...