Two-stage series gap lightning flashover protector with discharge counter

Abstract

The invention discloses a two-stage series gap lightning flashover protector with a discharge counter. The two-stage series gap lightning flashover protector with the discharge counter comprises a protector body and an arc suppressing electrode, wherein a support regulating board is connected with the lower end of the protector body, and a support board is connected with the outer end of the support regulating board; a counter fixing board is mounted at the lower end of the support regulating board and is provided with the discharge counter; an insulating block is mounted at the joint of the support regulating board and the protector body, and leads are connected between the protector body and the discharge counter and pass through the insulating block. The two-stage series gap lightning flashover protector with the discharge counter is connected with the ground through a natural body, the mounting is facilitated and simplified and is reliable, the performance characteristic is excellent, and the discharge is stable. The two-stage series gap lightning flashover protector with the discharge counter does not bear system voltage and system operating overvoltage, so that the reliability is increased, the service life is prolonged, and the maintaining cost is reduced.

Description

technical field [0001] The invention belongs to the field of power transmission equipment, and in particular relates to a two-stage series gap lightning flashover protector with a discharge counter. Background technique [0002] The distribution of 10kV overhead distribution lines is wide, the lines are long, and the terrain is complex. However, the insulation level of 10kV distribution lines is low. Lightning overvoltage can cause flashover of insulators, resulting in power frequency freewheeling on the lightning flashover channel. wire. The main reason for disconnection is that the arc is built on the lightning flashover channel to form a power frequency continuous flow. The temperature of the arc root is very high, and the wire can be blown in a short time. Even if the wire is bare, if the current passing through is large, It is also possible to blow the wire. [0003] At present, the lightning protection of domestic distribution lines mainly adopts single-gap zinc oxid...

AI Technical Summary

Problems solved by technology

[0004] 1. The phenomenon of unstable lightning discharge and weak arc extinguishing ability;

[0005] 2. If the zinc oxide body fails, the entire product will lose its lightning protection function;

[0006] 3. Due to the lack of monitoring of the number of lightning strikes of the lightning protection device, it is impossible to effectively confirm the number of actions and working conditions of the lightning protection device during operation

But with a single air gap, the lightning discharge is unstable and the arc extinguishing ability is not strong; the grounding down-conductor needs to be laid during installation, which leads to complicated installation and prominent problems of anti-theft and anti-corrosion

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