The use of power cables has a history of more than 100 years

The use of power cables has a history of more than 100 years. In 1879, American inventor T.A. Edison wrapped jute on a copper rod and threaded it into an iron pipe, and then filled it with asphalt mixture to make a cable. He laid this cable in New York and pioneered underground power transmission. The following year, the British Callender invented pitch-impregnated paper-insulated power cables. In 1889, the British S.Z. Ferranti laid a 10 kV oil-impregnated paper insulated cable between London and Dartford. In 1908, Britain built a 20 kV cable network. Power cables are being used more and more widely. In 1911, Germany started the development of high-voltage cables by laying 60 kV high-voltage cables. In 1913, the German M. Horchstedt developed a component-phase shielded cable, which improved the electric field distribution inside the cable and eliminated the tangent stress on the insulating surface, which became a milestone in the development of power cables. In 1952, Sweden laid 380 kV ultra-high voltage cables in the northern power plant, realizing the application of ultra-high voltage cables. By the 1980s, 1100 kV and 1200 kV UHV power cables had been made.