Stock Code:300252.SZ

Power cable characteristics and manufacturing requirements

author:kingsignal time:2017/08/11

Power cable is a cable used to transmit or distribute high-power power in a power system. Electric power from the power station through the overhead transmission lines, power cable to connect a variety of voltage levels of substation distribution, and then sent to the various units of electricity. Power cable Compared with other overhead bare wire, its advantages are limited by external climate interference, safe and reliable, hidden, less maintenance, durable, can be laid in various occasions. But the power cable structure and production process are more complex, high cost, it is generally used for power plants, substations, industrial and mining enterprises to introduce or lead the power of the line, and across rivers, railway stations, urban areas of transmission and distribution lines and Industrial and mining enterprises within the backbone of the power lines.


1. development of power cable


China power cable industry is developed after the founding of new China. Now can not only produce a variety of cables, and the voltage level from the low pressure level rose to 500kV above the high pressure level. The manufacturer also by the liberation of several to hundreds of development. Large domestic power plants and important transmission and distribution lines are mostly used in domestic power cable.


2.power cable type


Power cable according to its scope of use, structural characteristics and performance requirements and other major features into several varieties. Each variety and then according to the size of conductive wire core, core number, insulation materials, sheathing materials and voltage level, divided into a variety of different specifications. Mainly there are oil and paper insulation lead bag power cable, rubber insulation power cable, PVC insulation, PVC sheathed power cable, self-contained oil-filled cable.


3. manufacturing process


Power cable from raw materials processing to manufacture into a cable, due to different varieties of the entire manufacturing process is also different, in general, the following process: metal processing (smelting) → rolling → wire → stranded wire (a number of copper or aluminum wire twisted into a Wire core) → wire insulation (for rubber insulation and polyethylene insulated cable through the extruder and curing tube to complete the insulation core; the insulation of the cable insulation paper wrapped around the core, vacuum drying, oil to complete the insulated wire Core) → into the cable (the three or four shares to complete the insulation of the core stranded into multi-core cable conductor) → inside and outside the treatment layer.


The above is a brief description of the power cable features and manufacturing requirements, learn more about the power cable content, please pay attention to kingsignal official website.

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