DD862 type single phase watt-hour meter, that is, inductance type single-phase AC active energy watt-hour meter, it is used for measuring active energy at single phase AC power grid of 50HZ or 60Hz. It has many features, such as original design, reasonable structure, high overload capability, lower power consumption, long service life, good stability, convenient adjustment and maintenance, etc. and the DD862F has multi function of anti electricity-theft on a induction watt-hour meter. The meter conforms to all technical requirements stipulated in national standard GB/t 15283 Alternating Current watt-hour meter for Active energy(class 0.5, 1 and 2),and total technical requirements for single phase watt hour meter(class 2)stipulated in international standard IEC521.