Surge protection device with short circuit current protection function

Abstract

The invention discloses a surge protection device (100) with a short circuit current protection function. The surge protection device comprises a surge protection module (102) and a short circuit current protection module (101). The surge protection module discharges and inhibits surge current and voltage. The surge protection module is a pluggable module. The short circuit current protection module is integrated in a base. The short circuit current protection module provides short circuit protection and plugging installation for the surge protection module. According to the surge protection device, the problem that an impact current is brought to backup protection by using an external overcurrent protection device is overcome; the current limiting capability is high; the short circuit breaking capacity is high; the minimum instant tripping current value is low; the surge protection device can tolerate a fault mode occurring in transient over voltage TOV; and a protection effect is achieved under a low current.

Description

[0001] This application is a divisional application of the patent application entitled "Surge protector with short-circuit current protection function" with the filing date of November 12, 2012 and the application number of 201280077275.4. technical field [0002] The invention relates to the field of overvoltage protection of low-voltage power distribution systems, and more specifically relates to a voltage-limiting surge protector with short-circuit protection function. Background technique [0003] Due to factors such as impact, power frequency voltage fluctuations, and environmental temperature changes, the components (varistors) of the voltage-limiting SPD will inevitably deteriorate or fail due to short-circuit, resulting in thermal, short-circuit, or electric shock failures. The object or system itself poses a threat. Therefore, the voltage-limiting SPD must be protected against deterioration and short-circuit, that is, it must be equipped with a disconnector to preve...

AI Technical Summary

Problems solved by technology

[0006] However, the patent application still has great defects, such as: 1. Small current capacity; 2. Low short-circuit breaking capacity; 3. There is no short-circuit current short-circuit multiple overload protection, and the protection interval is small; 4. Short-circuit protection device protection reliability Not high; 5. The problem of temporary overvoltage protection caused by system failures caused by large-capacity surge shocks is not considered; 6. The overall volume of the product is large

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