Lightning protection device for distribution lines

Abstract

The embodiment of the present invention discloses a lightning protection device for distribution lines, which includes a lightning arrester casing, a spark gap component connected to the distribution line is installed in the lightning arrester casing, and a spark gap component is arranged below the spark gap component for connecting the spark gap component and the lightning gap component. The valve plate resistance component of the earth, the valve plate resistance component includes two first arc extinguishing components and a second arc extinguishing component that are oppositely arranged and used to elongate the arc to form the main spark gap, and the arrester shell is provided with a The permanent magnet block between the first arc extinguishing member and the second arc extinguishing member generates a magnetic field through the magnetic coil, and then cooperates with the annular metal sheet to move the third diaphragm, and further enables the first arc extinguishing member and the second arc extinguishing member to The distance between the electrodes on the arc member should not be elongated, so as to achieve the purpose of extinguishing the arc. After the distance between the electrodes is elongated, the remaining arc can have enough time to dissipate. The effect of the arc will be even better.

Description

technical field [0001] The invention relates to the technical field of lightning arresters, in particular to a lightning arrester for power distribution lines. Background technique [0002] Surge arrester is an electrical appliance used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, and to limit the freewheeling time and often limit the freewheeling amplitude. Surge arresters are sometimes called overvoltage protectors. Surge arresters are used in normal systems Under the working voltage, it presents a state of high resistance, and only microampere-level current passes through it. Under the action of overvoltage and large current, it presents low resistance, thus limiting the residual voltage at both ends of the arrester. [0003] The main types of arresters are tubular arresters and valve arresters, etc. The main working principles of each arrester are different, but their working essence is the same, which is to protect eq...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention discloses a lightning protection device for distribution lines. By utilizing the electromagnetic field to elongate the distance between the electrodes and cooperating with the permanent magnet block to achieve the purpose of arc extinguishing, the magnetic blow valve type lightning arrester in the prior art can be solved. In long-term use, it is vulnerable to the influence of the external environment and causes the problem of continuous breakdown arc.

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