Variable discharge gap device with automatic arc extinguishing

Abstract

The invention discloses a variable discharge gap device with automatic arc extinguishing. The variable discharge gap device comprises a cavity, a first electrode, a second electrode, a movable electrode and a resetting member having a conductive function, wherein the first electrode and the second electrode are both mounted on the cavity, the movable electrode is slidably disposed in the cavity; one end of the resetting member is connected to the second electrode, and the other end of the resetting member is connected to the movable electrode. When a power frequency freewheeling occurs, an arcis generated between the movable electrode and the first electrode to trigger the sliding of the movable electrode to break the arc, and the resetting member resets the movable electrode after the arc is broken. The variable discharge gap device utilizes Paschen's law to design a variable discharge gap device different from the traditional lightning surge protection component, which can automatically extinguish the arc and effectively solve the problem of power frequency freewheeling that cannot be processed by the conventional surge protection component.

Description

technical field [0001] The invention relates to the field of lightning surge protection, in particular to a variable discharge gap device for automatic arc extinguishing. Background technique [0002] At this stage, there are air gaps, gas discharge tubes, piezoresistors and other components among the lightning surge protection components at home and abroad, but in the first level of protection (10 / 350us), only air gaps, gas discharge tube. However, these two traditional products cannot be popularized due to the power frequency continuous current phenomenon, because the power frequency continuous current will cause lightning surges to short-circuit the user's power grid when passing through the above components, which is likely to cause fires. [0003] The traditional discharge gap adopts two opposite claw tips to discharge. The function of the tip is to facilitate discharge, but the concentrated arc current at the discharge interface is small. If the front switch is discon...

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Problems solved by technology

Therefore, the grid voltage will continue to provide energy after the lightning surge to maintain the existence of the arc. This arc current will become very large due to the power of the grid, which will easily cause failures such as power line burnout.

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