(1) Oil-paper insulation: viscous impregnated paper insulation type (integrated type, phase-separated shielding type);

Non-drip impregnated paper insulation type (integrated type, phase-separated shielding type);

Oil-impregnated paper insulation type with oil pressure (self-contained oil-filled cable, steel tube oil-filled cable);

There are air pressure viscous impregnated paper insulation types (self-contained oil-filled cables, steel tube gas-filled cables).

(2) Plastic insulation: PVC insulation type; poly

Vinyl insulation type; cross-linked polyethylene insulation type.

(3) Rubber insulation: natural rubber insulation type;

(4)  Acrylic rubber insulation type.