Power distribution type lightning arrester preventing sparks in pressure release process

Abstract

The invention provides a power distribution type lightning arrester preventing sparks in a pressure release process. When thunder and lightning and overvoltage occur, an overvoltage arc release path is formed by arc control panels under the point effect, overvoltage is rapidly released, and accordingly, lines and the lightning arrester are protected; by means of semi-ring grooves and longitudinalgrooves in the surfaces of upper electrodes, lower electrodes and intermediate electrodes, recombination of the electrodes and a casing is facilitated, adhesive force of the electrodes and the casingcan be improved, damp air is prevented from entering the casing, the risk of flash explosion is reduced, overall mechanical strength can be improved when the upper electrodes, the lower electrodes andthe intermediate electrodes are combined with components such as resistor discs, the casing and the like, bending resistance and torsional strength of the lightning arrester are improved, and the probability of disassembly of the lightning arrester in a pressure release process is greatly reduced; the electrodes are made of stainless steel instead of common aluminum or aluminum alloys, the electrode melting point is increased to 1,360 DEG C or higher from about 660 DEG C, and the probability of melt dropping of the electrodes is reduced.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a power distribution type arrester with no spark generated by pressure release. Background technique [0002] Surge arrester is a protective device used to protect various electrical equipment in the power system from damage caused by lightning overvoltage, operating overvoltage, and voltage shock. It is widely used in transformers, switch cabinets and transmission lines to avoid transient overvoltage in power systems. harm. [0003] Outdoors, especially in forests, where there are many lightning activities and dense vegetation, the electrode of the arrester sometimes melts and disintegrates and explodes when the pressure is released, resulting in metal droplets and sparks, which will not only damage the arrester, but also Risk of fire. If the arrester is not tightly sealed, water vapor enters the arrester, which may cause flash explosion; when encountering lightni...

AI Technical Summary

Problems solved by technology

[0003] In the outdoors, especially in the forest, there are many lightning activities and dense vegetation. When the arrester releases the pressure, the metal electrode will sometimes melt and disintegrate and burst, resulting in metal droplets and sparks, which will not only damage the arrester, but also cause damage to the arrester. fire risk

If the arrester is not tightly sealed, water vapor may enter the interior of the arrester, which may cause a flash explosion; when encountering lightning or overvoltage, the arrester relies on its own components for gap discharge. The discharge method is single, the arrester is easy to damage, and the maintenance cost is high.

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