What is the Difference Between Aerial Power Cables and Electrical Power Acables?

What is an aerial power cable? Many people are confused, what is the difference between what is usually called an aerial power cable and an ordinary electrical power cable? When are aerial power cables used?

1. Definition of the aerial power cable

Aerial power cables are overhead conductors equipped with insulating layers and protective sheaths. They are made of a special cable similar to the production process of cross-linked cables. They are a new transmission method between overhead conductors and underground cables. Aerial power cable is a cable construction method in which the cable rack is hung on a pole with a certain height from the ground. Compared with the underground cable, although it is vulnerable to external influence, unsafe and unsightly, it is simple to erect and low in construction cost. Therefore, it is still widely used in places with long distance, small number of users and great changes, and it is difficult to lay underground cables.

Aerial power cables are all single-core, and can be divided into hard aluminum wire structure, hard drawn copper wire structure, aluminum alloy wire structure, steel core or aluminum alloy core support structure and self-supporting three-core textured structure (The wire core can be hard aluminum or hard copper wire) according to their different structures. It has the main characteristics of high power supply reliability, good power supply safety, convenient erection and maintenance, and reasonable economy. Its main technical parameters include weather resistance, insulation level, inner and outer semi-conductive shielding layers.

2. The difference between aerial power cables and electrical power cables

Electrical power cables are cables whose conductors are covered with high-quality insulating materials and have various protective layers. Its main function is the same as that of aerial power cables, transmission and distribution of large capacity electric energy in power system. The difference from aerial power cables is that electrical power cables can be laid in various environments, safe and concealed, and not disturbed by external climate changes; and they can be less maintained and durable (generally more than 40 years). However, the structure of electrical power cables is relatively complex, with many manufacturing processes, and the product price is dozens of times higher than that of overhead wires. Therefore, it is generally used in occasions where overhead lines are not suitable, such as power transmission and distribution lines in cities and power introduction of industrial and mining enterprises into the main power lines in the plant area. And railway stations across rivers and underground tunnels. In fact, power lines are composed of aerial power cable conductors and electrical power cables. Aerial power cable conductors focus on the transmission, transformation and distribution parts of power generation, while electrical power cables focus on power distribution and power consumption. Therefore, medium and low voltage power cables The production volume accounts for more than 98%.

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