While ht cables are divided into two types of 75KV and 9OKV according to their pressure resistance. According to the arrangement of the Central Line coaxial and non – coaxial type of two. One of the capabilities of its ht cables is good insulation.

The insulation performance of the high-voltage cable accessories should not be lower than the cable body, and the dielectric loss of the insulation material used should be low. In terms of structure, the sudden change of the electric field in the cable accessories should be improved and measures to change the electric field distribution should be taken.