Power cables are cables used to transmit and distribute electrical energy. Power cables are often used in urban underground power grids, power station outgoing lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across the river. In power lines, the proportion of cables is gradually increasing. Power cable is a cable product used to transmit and distribute high-power electric energy in the main line of the power system, including 1-500KV and above various voltage levels, various insulated power cables. Next, let's take a look at the basic structure of power cables.
The basic structure of power cable has the following parts:
1. Core: The core is the conductive part of the power cable, used to transmit electrical energy, and is the main part of the power cable.
2. Insulation layer: The insulation layer electrically isolates the core from the earth and the cores of different phases from each other to ensure power transmission. It is an indispensable part of the power cable structure.
3. Shielding layer: 15KV and above power cables generally have conductor shielding layer and insulating shielding layer.
4. 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 the power cable from being damaged by external forces.