Zinc oxide arresters may experience some abnormal phenomena during operation. Staff need to promptly handle and maintain faults to protect the normal operation of the system and increase the service life of the arrester. The following are common abnormal phenomena of zinc oxide arresters and their maintenance methods:
1. The zinc oxide arrester suddenly exploded during operation, but it has not caused the system to be grounded. It can also be repaired. After the thunderstorm, open the isolation switch of the faulty phase, deactivate the zinc oxide arrester and replace it with a qualified arrester in time. If an explosion has caused the system to be grounded, it is prohibited to use an isolating switch to operate a deactivated arrester. When such an abnormal situation occurs, it needs to be used and maintained in this way and method to ensure the role of the arrester in use.
High voltage surge arrester
2. If the weather is normal and cracks are found in the arrester shell, the operation should be stopped immediately, the faulty arrester should be taken out of operation, and a qualified arrester should be replaced. If cracks are found in the porcelain sleeve during a thunderstorm, the operation should be kept until the thunderstorm has passed before processing. Generally, this kind of problem often occurs in arresters with porcelain sleeves. Nowadays, most manufacturers use silicone rubber zinc oxide arresters.
3. If there is an abnormality inside the metal oxide arrester or the casing bursts, it needs to be carefully inspected and inspected. This phenomenon may cause a system ground fault. When handling, personnel are not allowed to approach the arrester. A circuit breaker or artificial ground transfer can be used to disconnect the faulty arrester. When maintaining and repairing this kind of fault, follow the corresponding methods and methods to ensure the safety of human life.
4. The interior of the arrester action indicator is blackened or burned, the connection point of the grounding down conductor is burned out, the arrester valve resistance fails, the arc characteristics of the spark gap deteriorate, and the power frequency aftercurrent increases. For these abnormal phenomena, the arrester should be disassembled and inspected in time for electrical testing.
Zinc oxide arrester plays an important role in the system. During operation, it needs to be handled differently according to different situations to avoid accidents and ensure the normal operation of the system.
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