The replacement of products is the law of industry development. People usually pay attention to the performance quality of products, but often ignore the time quality of products, that is, reliability. The introduction of any new product should provide users with the performance quality, time quality and economic indicators of the product. The main methods to improve the reliability of SPD include:
a. Manufacturers improve MOV chip designs, adopt new materials and improved processes, and produce products with low failure rates and improve inherent reliability.
b. Provide a good environment such as suitable temperature, humidity and air pressure to maintain environmental reliability.
c. Screen and age the SPD to shorten the early failure period.
d. Replace deteriorating SPDs as appropriate or periodically.
e. Select an intelligent SPD and monitoring system capable of life early warning.
f. Derating design is the main method to improve SPD reliability.
The derating design is to reduce the electrical stress (surge) that the SPD bears. Reasonable derating can greatly reduce the failure rate of the SPD.