XLPE insulated non-extrusion shielded medium voltage power cable production process

Abstract

The invention relates to a production process of a medium-voltage power cable with cross-linked polyethylene insulation and non-extrusion shielding, and belongs to the field of environment-friendly medium-voltage power cables. The technical solution is: the conductor core adopts a compact conductor, and an antioxidant is added to prevent the oxidation of the copper wire during the production process, and the conductor core (1) is covered with an inner shielding layer (2) and an insulating layer (3) in turn. , silicone oil coating layer (4), wrapping semi-conductive tape shielding (5), wrapping copper tape shielding (6), wrapping non-woven fabric (7) and environmental protection PVC sheath (8); the insulating layer (3) is Co-extruded cross-linked polyethylene insulating layer; after wrapping semi-conductive tape shielding, wrapping copper tape shielding, and wrapping non-woven fabric, extrude environmentally friendly PVC sheath; then three cores are cabled, and the cable withstand voltage test is carried out , packaged as a finished product. The withstand voltage test of the cable produced by the present invention is 10 minutes, the withstand voltage is 17KV, the partial discharge of the cable at 10KV is not more than 10Pc, the cable has to pass the 67kV destruction test for 4 hours, and the electrical performance of the cable is high.

Description

Technical field [0001] The invention relates to a production process for a medium-voltage power cable with cross-linked polyethylene insulation and non-extrusion shielding, and belongs to the field of environment-friendly medium-voltage power cables. Background technique [0002] In the production of power cable products, customers need 6.6kV CVT cables. The required performance needs to meet the Japanese high-voltage power cable JIS C3606 standard. At the same time, the cable meets the ROHS requirements. The shielding adopts semi-conductive tape wrapped shield and copper tape shield. The insulation shield of the cable must be stripped, and the cable extrusion insulation shield stripping is time-consuming and laborious. The wrapped insulation shield of the cable is mainly to facilitate the cable joint. The cable transmission is the power transmission of the 6.6kV power distribution cabinet. The cable transmission distance is short and the short section is long. BACKGROUND Medium ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a production process of cross-linked polyethylene insulated non-extrusion shielded medium voltage power cable, which consists of conductor, inner screen, insulation, silicone oil coating, wrapping semi-conductive tape and copper tape, non-woven fabric and environment-friendly PVC sheath Combined together, all the materials of the cable as a whole meet the ROHS environmental protection requirements and electrical performance requirements, which solves the time-consuming and labor-intensive problems that the medium-voltage power cable joints must be stripped and extruded when the medium-voltage power cable joints exist in the background technology.

Images