... IEC 4)OEM DDS Electronic Single-phase Energy Meter,Electric Energy Meter,kWh Meter,Power Meter,Iron base, ABS cover, digital Three-phase ... Static Active Electronic Energy Meter,Electric Energy Meter,kWh Meter,Power MeterMain Characteristics and Functions:1. Adopting ... add RS-485 and infrared interfaces.7. Power failure in one phase (3P3W) or two phases (3P4W) will not affect ...