Discharge module of overvoltage protector

Abstract

A discharge module of an over-voltage protection device comprises a case formed by a pressure resisting metal piece (116), an accommodation space (117) in the case, and a first electrode (103) and a second electrode (104) that are independent and insulated from each other, and are disposed in the accommodation space (117). The first electrode (103) and the second electrode (104) are connected through a discharge channel (102) in the accommodation space (117). The path of the discharge channel (102) is arranged along an arc electric field line formed by the first electrode (103) and the second electrode (104) on an end face in the discharge channel (102). The discharge module can improve the follow current interruption capability of the discharge channel (102).

Description

technical field [0001] The invention relates to electrical equipment used for overvoltage protection, and more specifically relates to a discharge module of an overvoltage protection device, which is especially suitable for low-voltage power distribution systems. Background technique [0002] According to the existing understanding, there are two ways for the overvoltage of the power system or signal system caused by lightning, one is to directly act on the electrical system and damage the power equipment and other electrical appliances through ground potential counterattack, lightning strike lines, etc.; the other is It is the cloud flash, lightning strike the ground or lightning strike other buildings through the coupling way, which indirectly acts on the electrical system and damages power equipment and other electrical appliances. For these different intrusion methods, IEC standard IEC62305-1 and standard IEC62305-4 establish a lightning protection system by specifying t...

AI Technical Summary

Problems solved by technology

[0010] The problem now is that, first of all, the size of the space distance between the first and second electrodes will affect the generation of the trigger arc and the corresponding trigger circuit. Due to the limitation of the product volume, this effect will spread to the entire surge protector. Product performance and functionality

For example: increasing the space distance between the first and second electrodes will prolong the formation of most of the lightning current channels, that is, increase the load burden of the trigger circuit, and at the same time increase the residual voltage value accordingly, reducing the protection performance of the product ;

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