WDZN-YJY low smoke halogen-free power cable
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 cables used in the backbone lines of the power system to transmit and distribute high-power electrical energyproduct, including various voltage levels of 1-500kV and above, and power cables with various insulation
1Oil immersed paper insulated power cablePower cables insulated with oil impregnated paper. Its application history is the longest. It is safe, reliable, has a long service life, and is affordable. The main drawback islayRestricted by the height difference. Since the development of non drip impregnated paper insulation, the problem of height difference limitation has been solved, allowing oil immersed paper insulated cables to continue to be widely used.
2. The insulation layer of plastic insulated power cables is extruded plastic power cables. Common plastics includepolyvinyl chloride、polyethylene、cross-linked polyethylenePlastic cables have a simple structure, are easy to manufacture and process, are lightweight, easy to lay and install, and are not affected by layingdropLimitations. Therefore, it is widely used inlow voltage cableAnd there is a trend to replace sticky impregnated oil paper cables. Its biggest drawback is the existence of dendritic breakdown phenomenon, which limits its use at higher voltages.
3Rubber insulated power cableThe insulation layer is made of rubber with various additives, thoroughly mixed and extruded onto the conductive wire core, and then vulcanized by heating. It is soft and elastic, suitable for situations with frequent movement and small bending radius for laying.
Commonly used insulation materials include natural rubber butadiene rubber mixture, ethylene propylene rubber, butyl rubber, etc.