The DD862 type single phase watt hour meter is a kind of induction 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 over-load, low power loss and long life etc.All technical targets are completely conformed to the stipulated requirment of National Standard GB/T17215.3..-2008 class 0.5 .1 and 2 AC Active Watt hour Meter and international Standard IEC60521. Function and Feature 1.Sub-closed iron core 2.The die-casting frame is made of alloy aluminum,to assure the magnetic line stably and reliably. 3.Metering bearing has three kinds,may select dual jewel,magnetic thrust or magnetic float. 4.May select 5+1 digits of 5 digits register; 5.May select 5 kinds of cases :bakelite,PC, ABS plastic,glass and aluminum