Power cable is used for the transmission and distribution of electric power cables, power cables are often used in urban underground power grids, power station lines, industrial and mining enterprises internal power supply and underwater transmission lines across the river and sea. In the power line, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power energy in the backbone line of the power system, including 1-500KV and above various voltage levels, various insulated power cables.