What is the difference between power cables and aerial cables?

Difference Between Power Cables and Aerial Cables


The use of electrical cables has a history of over 100 years. In 1879, American inventor TA Edison rolled jute onto a copper rod and threaded it through an iron pipe, then filled it with an asphalt mixture to make a cable (prototype cable power supply). He laid this cable in Pakistan and has since pioneered underground electrical transmission. In the early 1960s, France, Sweden, Finland, and other countries began researching and developing overhead cables based on their dense forests. Overhead cables appeared nearly a century later than power cables. So what is the difference between power cables and overhead cables? 

between power cables and aerial cables


The nature of power supply cables and aerial cables is different


Power supply cables are cables whose conductors are externalized with high-quality insulation materials and various protective layers. Its main function is the same as overhead cables, transmitting and distributing large capacity electric power in the electrical system. Power supply cables are often used in urban underground power grids, power plant output lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across the river. The difference between power supply cables and overhead lines is that power supply cables can be laid in a variety of environments, safe and hidden, undisturbed by external climate change. They are less maintenance, and long-lasting (usually require more than 40 years). Litech Pakistan is the Top Manufacturer of Best Quality Optical Fiber Cables in Pakistan. And is Sole Distributor in Pakistan for Exfo (Canada), Sumitomo Electric (Japan) , Wolong Batteries (China)? Our professional skills in manufacturing Fiber, Voice, Structured Cabling Solutions.... 

Aerial cable (full name aerial insulated cable) is an aerial wire equipped with an insulating layer and a protective sheath. This is a special cable made with a production process similar to cross-linked cables. It is a new method of power transmission between overhead wires and underground cables. Aerial cable is a method of cable construction in which the cable support is suspended from a pole at a certain height from the ground. Compared to underground cables, although overhead cables are more susceptible to external influences, they are not safe or beautiful enough. And they are easy to mount, widely used in places where it is difficult to lay underground cables. They also have low construction costs.

The classification of power supply cables and aerial cables is different Power supply cables can be divided into medium and low voltage power cables (35 kV and below), high voltage cables (above 110 kV), ultra high voltage cables (275 to 800 kV) and UHV cables (1000 kV and above) depending on the voltage levels. Moreover, they can be divided into AC cables and DC cables according to the current system. General overhead cables are single core and can be divided into hard aluminum wire structure, hard drawn copper wire structure, aluminum alloy wire structure, steel or alloy core support structure aluminum and self-supporting three-core pattern structure and so on according to their different structures. (Wire core can be hard aluminum or hard copper wire) 

The characteristics of power supply cables and aerial cables are different


Power supply cables are usually buried in the ground or laid indoors in trenches and tunnels. The insulation distance between the lines is small. No post is needed. And they occupy a small area and do not even take up floor space. In addition, the power supply cable has high reliability and stable transmission performance and is less affected by weather conditions and the surrounding environment. Aerial cables have the main characteristics of high power supply reliability, good power supply security, convenient assembly and maintenance, and reasonable economy. The domestic overhead cable was put into trial operation in Shanghai in 1988. The trial overhead cable runs along the dense boulevard of Huaihai Road. After the typhoon season in Shanghai and the high temperature in summer, it works well, and its power failure rate is much lower than the original overhead bare conductor. Aerial cables will not produce degradation of water trees during use. After years of operation, the cable insulation quality has not decreased significantly, and the power supply security is good. 
Location: Pakistan

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