The DD862 type single-phase watt-hour meter is a kind of induction type meter, which is applicable to measure the rated frequency 50Hz and power loss in electrified wire netting. The meter has novel design, rational structure and features of high overload, low power loss and life etc. All technical targets are completely conformed to the stipulated requirement of National Standard GB/T15283-94 Class 0.5, 1 and 2 AC Active Watt-houe Meter and International Standard IEC60521.