The basic structure of power cable consists of four parts: core (conductor), insulation layer, shielding layer and protective layer.
Core
The core is the conductive part of the power cable, used to transmit electric energy, and is the main part of the power cable.
Insulation layer
The insulation layer is to electrically isolate the core from the earth and the cores of different phases from each other to ensure the transmission of electric energy. It is an indispensable part of the power cable structure.
Shielding layer
Power cables of 15kV and above generally have conductor shielding layer and insulation shielding layer.
Protective layer
The function of the protective layer is to protect the power cable from the intrusion of external impurities and moisture, and to prevent external forces from directly damaging the power cable.