... standard 3.RS485 output interface Good quality watt meter digital single phase Product brief introduction The DDS3666 ... type single-phase electronic watt-hour meter adopt specialized LSI, the device typifying new ... overload ratio>6 Low power consumption: consumption of meter itself<1w High reliability: MTBF>105 Weight: < ... 10),5(20),5(30),10(40),10(60),15(60),20(80),30(100) Rated voltage(V ...