Power cables are cables used for transmitting and distributing electrical energy. Power cables are commonly used in urban underground power grids, power station outgoing lines, internal power supply of industrial and mining enterprises, and underwater transmission lines crossing rivers and seas.

The proportion of cables in power lines is gradually increasing. Power cables are cable products used in the backbone lines of power systems to transmit and distribute high-power electrical energy, including various voltage levels of 1-500kV and above, and various insulated power cables