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overhead power transmission line
- Dec 14, 2018 -

The overhead power transmission line is composed of a tower tower, a wire, an overhead insulator, a line fitting, a cable, a tower foundation, a grounding device, and the like, and is erected on the ground. According to the nature of the current delivered, the transmission is divided into AC transmission and DC transmission. In the 1880s, the first direct realization of DC transmission. However, since the voltage of the direct current transmission is difficult to continue to improve under the technical conditions at that time, the transmission capacity and efficiency are limited. At the end of the 19th century, DC transmission was gradually replaced by AC transmission. The success of AC transmission has ushered in a new era of electrification society in the 20th century.