Medium voltage cable

The cause of the manufacturing of the cable body

Generally, in the process of cable production, the problems often occur in the process of cable production, such as insulation eccentricity, uneven thickness of insulation shielding thickness, impurities in insulation, penetration of internal and external shielding, uneven crosslinking degree, cable dampness, and poor sealing of cable metal sheath. It exists in the cable system in the form of defects, causing serious hidden danger to the cable's long-term and safe operation.

Cable grounding system
The cable grounding system includes cable grounding box, cable grounding protection box (with sheath protector), cable cross interconnect box, sheath protector and so on. Generally, the main problem is that the box is not well sealed, and the water leads to multi point grounding, which leads to the excessive induction current of the metal sheath. Besides, the parameter selection of the sheath protector is unreasonable or the quality is not good. The unstable Zinc Oxide crystal is also easy to cause damage to the protective layer protector.