Lightning arrester

Abstract

The lightning arrester comprises an insulating tube, two ends of the insulating tube are sealed by conductive end sockets, the insulating tube is filled with quartz sand, the quartz sand wraps an arc striking line and is electrically connected with the conductive end sockets at the two ends, one end of the lightning arrester is fixedly connected to a grounding end or an electrified end through a connecting piece, and the other end of the lightning arrester and the electrified end or the grounding end form a discharge gap. The discharge gap is smaller than an air gap of the insulator, when lightning overvoltage breaks down the discharge gap, the arc striking line is fused to trigger an electric arc to discharge lightning, the electric arc is inhibited and extinguished by the quartz sand, and line tripping is avoided; compared with the prior art, the lightning arrester has the advantages of small cross section, light weight and the like, the length can be manufactured and assembled according to the requirements of an installation site, and the overall cost is greatly reduced, so that the lightning arrester can be installed on an overhead transmission line in a large-area or even full-coverage manner; the lightning stroke trip-out rate is greatly reduced, and meanwhile, technical and economic feasibility and practicability are achieved.

Description

Technical field [0001] The invention involves the field of lightning protection technology in the transmission rod tower, which specifically involves a minefarers. Background technique [0002] Most of the transmission lines in the power system are overhead lines, and it is easy to suffer from lightning strikes.According to statistics, the cards caused by lightning strikes account for about 80%of all the number of branches, which brings great difficulties to Yingxia Summer Electricity, and also causes serious losses to the national economy. [0003] The transmission line is now generally used for lightning protection and ground lightning protection. It is difficult to defend the thunderbolt. The lightning resistance with large lighting values requires that the ground resistance is relatively small, and the construction and maintenance costs of the ground network are higher.The lightning mock can let the lightning current leak into the ground, avoiding the slogan from continuous s...

AI Technical Summary

Problems solved by technology

Zinc oxide surge arresters have relatively high requirements on the manufacturing process, high cost, bulky overall, difficult transportation and installation, and are prone to damage or even explosion. Periodic tests are required during use, and the operation and maintenance costs are too high. Promote on a large scale

[0004] Low-cost lightning protection can be achieved by installing a lightning protection device using gas-generating arc extinguishing on the tower, but because the explosively ejected high-pressure gas will generate a huge impact force, the structural strength requirements for the arrester body and the mounting bracket are relatively high. High, it is more difficult to extinguish arcs on lines with higher voltage levels

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