When the high voltage cable is damaged, it should be repaired after confirming that there is no damage inside the cable. Otherwise, the practical significance of repairing the cable jacket is not significant. Repair the cable in time, otherwise the entry of external moisture and moisture will affect the normal service life of the cable over time.

High Voltage CableAfter the insulation layer is damaged, when the damage depth of the insulation layer reaches more than 10% of the thickness of the insulation layer, the insulation reinforcement treatment shall be carried out. When repairing insulation, first clean up the dirt on the damaged part, and then repair it with insulating self-adhesive tape. Pay attention to dustproof and waterproof when winding.

When winding the self-adhesive tape, the overlapping pressure between each turn of the insulating self-adhesive tape of the high-voltage cable is the bandwidth of 1/2, the repair thickness is greater than the damage depth of the insulating layer, and shall not be less than two layers, the severely damaged part shall not be less than five layers, and the repair length at both ends of the repaired part shall be 20 mm. The damaged part of the wire insulation layer can also be covered with a special insulating shield, and the opening part is wrapped and sealed with insulating self-adhesive tape.

In the same span, the insulation layer of a single insulated wire of a high-voltage cable should not be repaired more than 3 parts. Special tools should be used when stripping the insulation layer and semiconductor layer of the wire, and the wire should not be damaged. Insulation and wire cores at the cutout shall be chamfered 45°. All contacts, splices and cuts of insulated wire are insulated and protected and no wires or splices shall be exposed to prevent water ingress.

The part of the cable that is damaged during routing is random. In order to reduce the investment in related aspects and solve the problem quickly, a key problem is that there are sufficient personnel in the cable laying process. Regular cable laying equipment should be used for regular laying out to avoid and reduce the sheath damage during the cable laying out process. During the operation of high-voltage cables, it is necessary to strengthen the maintenance and inspection along the cables.

A number of tools and materials for on-site repair of cables are available. High voltage cable Insulation tape, waterproof tape, outer skin peeled from plastic insulation and sheath and other sealing materials are also ready, because cable insulation sheath materials are mainly divided into cross-linked polyethylene, polyethylene, materials such as polyvinyl chloride.