What is the function of insulation screen in MV cable?

The insulation and shielding structure of medium voltage cables is relatively complex, usually composed of multiple components such as cable core, insulation layer, semiconductor shielding layer, metal sheath, and outer protective layer.
1. Protect the cable core
The insulation shielding of medium voltage cables can effectively protect the cable core from mechanical damage and external electromagnetic interference.
2. Enhance cable durability
The semiconductor shielding layer of medium voltage cable insulation can not only balance the electric field and prevent partial discharge, but also enhance the durability of the cable and extend its service life.
3. Improve cable transmission performance
The insulation and shielding of medium voltage cables can effectively reduce the transmission loss and crosstalk interference of cables, and improve the transmission performance and stability of cables.
4. Safety
The insulation and shielding of medium voltage cables can effectively prevent accidents such as fires and electric shocks, ensuring the safety of the power system and personnel.