ABSTRACT
Most of the lightning arresters of distribution lines in Fujian Province are naturally grounded by concrete poles, which can easily lead to concrete burst and fall in case of lightning overvoltage, resulting in the exposure of steel bars within the poles to the air, thus accelerating corrosion. In this paper, an internal grounding scheme of electric pole is proposed, which directly grounded the low-voltage side of lightning arrester. The thermal stability calculation of grounding wire, connection resistance calculation, and experiment of grounding scheme meet the requirements of relevant specifications.
