This uses the North China electric power group company standard "Outside the Power equipment To insulate with Takes shape the Permanence Anti flashover the Compound Coating (PRTV) To use Leads Then", With Hebei silicon valley chemical industry limited company standard Q/HGH 019-2004 "Outside PRTV Power equipment Insulates with Takes shape Permanence Anti flashover Compound Coating" to organize the product the production and the construction.