... Power Meter,Iron base, ABS cover, digital Three-phase Static Active Electronic Energy Meter,Electric Energy Meter,kWh Meter ... energy (bi-direction) with LED power supply and phase loss indicators.5. Pulse output with optical coupling ... 485 and infrared interfaces.7. Power failure in one phase (3P3W) or two phases (3P4W) will not ... (5VA)Current Loop Consumption≤1VA DDS5558 Electronic watt-hour meter