paper wrapped copper wire
Paper wrapped copper wires are manufactured as single conductor of as twin and triple conductors. They are mainly used for windings in oil-cooled transformers.
The following insulated material can be used insulation of paper insulated winding wires:
110-330KV high voltage kraft paper,
insulated paper for 500kv transformer,
MIKI high density paper,
Thermally up-graded paper,
Paper with adhesive coating,