Power cable for the transmission and distribution power cables. Commonly used in the urban underground power grid, power stations leads to lines, industrial and mining enterprises in the internal power supply and the river, harbor underwater transmission line. In the power lines, cables share is steadily increasing.

Power cable is the main power system on the lines for power transmission and distribution power cable products, including 1-500KV and above all voltage levels, a variety of insulated power cable.

The basic structure of power cables from the cable core (conductor), insulating layer, shielding layer and protective layer composed of four parts.

(1) wire core wire core conductive part of the power cable used to transport energy, the main part of the power cable.

(2) insulating layer of insulation is the line core and earth and between cores of different phases to each other in electrical isolation, to ensure the energy transport, the structure of the power cable is not an integral part.

(3) shield and above 15KV power cables generally have a conductor shield and insulation shield.

(4) the role of protective layer protective layer is to protect the power cable from external impurities and moisture intrusion, and to prevent direct damage to external power cable.