Novel back-up protection device for surge protector

Abstract

The invention relates to a novel back-up protection device for a surge protector. The back-up protection device adopts a relay (1), wherein a control unit (2) and a protection unit (3) are arranged in the relay (1); the control unit (2) is connected with an external measurement and control device; and the protection unit (3) is connected in series with a surge protection device (5) in a surge protection return circuit. The device adopts a contact device or a contact capable of bearing strong surge currents as the protection unit (3), can prevent the surge protector from being damaged when the surge protector discharges the surge currents, and adopts the control unit (2) connected with the measurement and control device to realize controllable operation of back-up protection of the surge protector. Even if the surge protector has weak abnormal information, the back-up protection device can disconnect the protection unit (3) through the control unit, separates the surge protector from circuits and effectively solves the existing problems.

Description

technical field [0001] The invention relates to a novel backup protection device of a surge protector, which belongs to the technical field of surge protection of electronic and electrical equipment. technical background [0002] Lightning and line surges caused by lightning and line surges caused by other reasons are important reasons for the aging and damage of electrical and electronic equipment. It is one of the important measures for lightning protection to install surge protectors on metal lines such as power lines, signal lines and control lines connected to electronic equipment. In this technical field, an important problem currently exists is: while the surge protector protects the equipment, its own devices will gradually deteriorate until completely damaged, or directly damaged under excessive surge impact, or cause Switch-type surge protection devices generate freewheeling; for power surge protectors, the damage or damage caused by them includes short-circuit (i...

AI Technical Summary

Problems solved by technology

In this technical field, an important problem currently exists is that while the surge protector is protecting the equipment, its own components will gradually deteriorate until they are completely damaged, or they will be directly damaged under excessive surge impact, or cause The switch-type surge protection device produces freewheeling; for the power surge protector, its damage or cause damage includes short circuit (including freewheeling, hereinafter omitted) and leakage current increase causing heating; for signal surge protector, The damage phenomenon is generally the increase of the impedance of the surge protector to signal transmission and the short circuit of the surge protector.

[0004] The above solutions still have the following problems: the selection of circuit breaker or fuse parameters conflicts with the requirements of power distribution protection, and cannot meet the requirements of selective coordination of power distribution protection

For the signal circuit, the voltage is low and the current is very small. The fuse is required to be disconnected when the surge protection device is short-circuited, and cannot be disconnected when a strong surge is impacted. At present, there is no product that meets this requirement (fuse or breaker)

That is to say, for the backup protection device, the ideal requirement is: even if a small power frequency current or signal current flows, it must be disconnected immediately, but a very large surge current cannot be disconnected, and there is no corresponding one at present. Devices can solve the problem, but it is helpless to use fuses or circuit breakers as the short-circuit protection of surge protectors.

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