1. Three phase power watt-hour meter 2.8 digit LCD ... used to measure 50Hz or 60Hz active energy consumption from three phase four wire AC electricity net. The meter adopts LSI ... 1.5(6),3(6), 5(20), 10(40), 15(60), 20(80), 30(100),etc.Rated Frequency50Hz or ... Pulse OutputPulse width: 80ms ± 20msPotential StartPotential start proof logical design, voltage reversal add rated voltage 115%, when no current is ...