Lightning arrester of distribution line

Abstract

The embodiment of the invention discloses a lightning arrester of a distribution line. The lightning arrester comprises a lightning arrester shell, wherein a spark gap component connected with a powerdistribution line and a valve plate resistor component arranged below the spark gap component and used for connecting the spark gap component with the ground are installed in the lightning arrester shell, the valve plate resistor component comprises a first arc extinguishing component and a second arc extinguishing component which are oppositely arranged and used for lengthening an electric arc to form a main spark gap, and the lightning arrester shell is provided with a permanent magnet block installed between the first arc extinguishing component and the second arc extinguishing component.The lightning arrester is advantaged in that a magnetic field is generated through a magnetic coil, a third spacer can move by matching with an annular metal sheet, a distance between the electrodes on the first arc extinguishing component and the second arc extinguishing component can be further lengthened, so a purpose of arc extinguishing is achieved, after the distance between the electrodes is lengthened, the residual arc can be dissipated for enough time, and the arc extinguishing effect can be more excellent in cooperation with the arranged permanent magnet blocks.

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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