Flame-retardant insulation wire structure

The utility model relates to a flame-retardant insulation wire structure, which comprises a copper conductor, a two-layer flame-retardant modified polyester insulation layer and a layer of flame-retardant modified polyamide resin layer. The two-layer flame-retardant modified polyester insulation layer are extruded and coated outside the copper conductor, the flame-retardant modified polyamide resin layer is extruded and coated outside the two-layer flame-retardant modified polyester insulation layer. Compared with the prior art, the utility model reaches the B stage with the high temperature insulation stage of 130 DEG C., the flame retardant stage reaches UL V-0 standard. And compared with the tri-layered insulation wire of B stage in the prior art, the flame retardant performance of the winding wire is greatly improved, can greatly improve the safety fire-proof performance of the transformer when applied in transformer and high frequency winding wires.