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Power Cable Classification
Mar 21, 2018

According to the voltage grade

According to voltage level, it can be divided into medium and low voltage power cables (35 thousand volts or below), high voltage cables (over 110 thousand volts), EHV cables (275~800 kV), and UHV cables (1 million volts or above). In addition, it can be divided into AC and DC cables according to the current system.

According to insulating material

1. The electric cable of oil immersed paper insulated power cable with oil immersed paper as insulation. It has a long history of application. It is safe, reliable, long service life and low price. The main disadvantage is that the laying is limited by the fall. Since the development of insulation paper after dripping tidewater dip solution, drop restrictions, so that the oil paper insulated cable continued widely used.

2. The insulating layer of the plastic insulated power cable is the power cable of the extruded plastic. The commonly used plastics are PVC, PE and XLPE. The plastic cable is simple in structure, convenient in manufacturing, light in weight, convenient to install and installed, and is not restricted by laying drop.

3. The insulation layer of rubber insulated power cable is rubber plus a variety of coordination agent. After full mixing, it is packed on the conductive wire core and cured by heating.

The commonly used adhesives for insulation are natural gum - styrene butadiene gum mixture, ethylene propylene rubber, butyl rubber and so on.


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