The paper covered wire is the wire, oxygen-free copper rod or electric round aluminum rod with certain specification mold extruded or drawn from specific insulation material wrapped winding wire. Composite conductor according to requirements by the number of root winding wire or copper, aluminum wire arranged by the specific insulating material around the package from the winding wire.

The paper covered wire is mainly used for winding oil-immersed transformers, reactors and other electrical devices.