Paper-insulated wires consist of conductive material surrounded by insulating material, such as Kraft paper, thermally stabilized paper, and other similar papers. The addition of insulating paper prevents the conductive component from making contact with other wires and components within an electrical or electronic device. It also serves as a protective layer against moisture and other environmental factors.

The annealed conductor of Paper Covered Magnet Wire is extruded or dawn from oil-free copper rod or electrical round aluminum rod with certain specification mould. Then the copper or aluminum conductor is wrapped with two layers' or more than two layers' insulation paper including telephone paper, cable paper, high voltage paper, NOMEX paper, turn-to turn insulation paper. The product is widely applied in oil-immersed transformers and other similar electrical instruments. The electrical bare copper or aluminum wire with extrusion process is the ideal material for kraft paper wrapped copper or aluminum wire.

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