The DDS196 type Single-phase Electronic watt-hour meter adopt exclusive use LSI, the device typifying new periphery component,simple structure, high reliability, low power consumption,long life etc, is suitable for the single-phase AC active electric energy with rated frequency of 50Hz. The performance is in conformity with the technical requirements for Single-phase Electronic Watt-hour meter stipulated in GB/T 17215-2002 Class 1 and 2 Static AC Active Watt-hour Meter standard.....