Controllable multi-layer gap overvoltage protector with high weldability based on graphite-metal coating

Abstract

The invention discloses a controllable multi-layer gap overvoltage protector with high weldability based on a graphite-metal coating, the multi-layer gap overvoltage protector is formed by connecting a fixed multi-layer gap part and a controllable multi-layer gap part in series, and an intelligent controllable switch is connected to two ends of the controllable multi-layer gap part in parallel; and the intelligent controllable switch is automatically coupled with the energy of the overvoltage to output a trigger pulse to trigger the intelligent controllable switch to be switched on, so that the controllable part of the multi-layer gap is short-circuited, therefore, the overvoltage gap with the multi-layer structure has the remarkable characteristics of high alternating current and direct current withstand voltage, high lightning voltage protection level, short response time, high power frequency or direct current follow-up current resistance and the like, and can be used for direct lightning stroke and lightning induction overvoltage protection in application occasions such as the communication field and even the electric power field.

Description

technical field [0001] The invention relates to an overvoltage protection device, in particular to a controllable multi-layer gap overvoltage protector based on graphite-metal coating with high weldability. Background technique [0002] With the application of switchgear in high-voltage transmission lines and the technological progress of electronic and information systems, the impact and harm of overvoltage on sensitive and weak electronic equipment and communication devices are increasing. Overvoltage protection is the key to power, An important guarantee for the safe operation of the communication system. [0003] Since the overvoltage protection spark gap of the claw electrode structure of Phoenix Contact Company of Germany and the overvoltage protection product of the laminated graphite structure of Opterman Co., Ltd. came out, many domestic research institutions and production enterprises have based on the overvoltage protection of the laminated structure. The gap has...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to aim at the defects existing in the existing laminated graphite gap, and propose a graphite-metal coating based controllable multi-layer gap overvoltage protector with high weldability, which can significantly improve the protection of the multi-layer overvoltage protection gap performance, effectively solve the technical problem of the mutual restriction of AC and DC voltage tolerance, anti-following ability and lightning overvoltage protection level of the overvoltage protection gap, and can also effectively solve the problem of poor weldability between the graphite gap and the external electrical connection metal electrode fatal flaw

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