Fully-sealed liquid lightning arrester

Abstract

The invention discloses a fully-sealed liquid lightning arrester, which belongs to the technical field of lightning protection and arc extinguishing, and is characterized in that the lightning arrester is a sealed insulating tube, the insulating tube is internally provided with a hollow structure, the hollow structure is filled with insulating liquid, two ends of the insulating tube are provided with electrodes, and the electrodes extend into the hollow structure and are in contact with the insulating liquid. The electric arc is quickly cut off, the electric arc discharges in liquid to generate a liquid-electric effect, impact pressure waves are quickly formed, the impact electric arc is immediately cut off when the impact electric arc is just formed, the reignition of the impact electric arc is delayed, and the continuous discharging condition and the reignition condition are damaged by high voltage in the ceramic tube.

Description

technical field [0001] The invention relates to the field, in particular to a fully sealed liquid arrester. Background technique [0002] Zinc oxide arresters are installed and used in parallel with line insulators (series), which can effectively reduce the accident rate of lightning flashover tripping and improve the lightning resistance level of AC overhead transmission lines. However, the existing zinc oxide arresters have the following problems: [0003] 1. The zinc oxide arrester is affected by the impact voltage, and the valve plate will also age under the action of the impact voltage energy. [0004] 2. Since the zinc oxide arrester cancels the series gap, under the action of the operating voltage of the power grid, its body needs to flow current, and the active component in the current will make the zinc oxide valve piece heat, which in turn will cause a change in the volt-ampere characteristic. This is a positive The result of the feedback process and long-term ac...

AI Technical Summary

Problems solved by technology

[0003] 1. The zinc oxide arrester is affected by the impact voltage, and the valve plate will also age under the action of the impact voltage energy

[0004] 2. Since the zinc oxide arrester cancels the series gap, under the action of the grid operating voltage, its body needs to flow current, and the active component in the current will make the zinc oxide valve piece heat, which in turn will cause a change in volt-ampere characteristics. This is a positive The feedback process and the long-term effect will lead to the aging of the zinc oxide valve plate, and even thermal breakdown

[0005] 3. Moisture inside the zinc oxide arrester or poor insulation performance of the insulating bracket will increase the power frequency current, increase power consumption, and cause internal discharge in severe cases

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