The method to check whether the lightning arrester is normal is as follows: 1. Check the wiring to see if there is any contact between the wires. If there is contact, immediately handle it to avoid causing equipment short circuits and other situations. 2. The lightning arrester for equipment maintenance does not require special maintenance. It only needs to be regularly checked for loose connections and whether the working status indicator light is normal. When the working status indicator light turns green, it indicates that the lightning arrester is working normally. When emitting a red light, it indicates that the lightning arrester has damaged its components and the lightning protection effect has deteriorated, and it must be replaced immediately. The lightning arrester is characterized by high voltage low resistance and low voltage high resistance. Namely, it is usually in a high resistance state. When subjected to direct or induced lightning, the voltage suddenly increases, and the lightning arrester becomes low resistance discharge, playing a role in protecting parallel circuits; After the lightning passes, it returns to a high resistance state. When the lightning current exceeds the maximum discharge current of the lightning arrester, the lightning arrester may be damaged and remain in a low resistance state, which means that a ground fault occurs and will cause the superior circuit breaker to trip. If there is a backup protection circuit breaker, it will trip directly and will not affect the normal operation of the entire circuit. At this point, the lightning arrester also needs to be replaced with a new one
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