The conductor shielding material of medium-voltage power cable is a key functional polymer material specially used in 6kV to 35kV power cables. It is mainly used to cover the outer layer of the cable conductor to form a stable semi-conductive shielding layer. This material plays a core role in uniform electric field, reducing local electric stress and improving insulation performance in the cable system. It is one of the basic materials to ensure the safe operation of medium-voltage cables.
The material has good bonding performance with the insulation layer, is not easy to delaminate, can form a stable interface, effectively prevent electric field voids and corona discharge, and improve the integrity and reliability of the insulation structure.
A controllable semi-conductive interface is established through the shielding layer to reduce the electric field gradient and protect the cable insulation layer from erosion by the sharp electric field.
It is used for 6~35kV urban medium-voltage distribution cables to provide a reliable shielding structure for the transmission of electric energy and ensure the stable operation of the distribution network.
Although the conductor shielding material of medium-voltage power cable belongs to the "hidden" structure of the cable, it is an important guarantee that affects the overall performance, life and safety of the cable. With the continuous advancement of medium-voltage distribution system technology, the performance requirements for conductor shielding materials are also constantly improving.