Reason Analysis and Solutions of Switching Overvoltage Caused Reactor Faults

When vacuum high-voltage breaker switches in reactors,the switching overvoltage(cut-off overvoltage,multiple reignition overvoltage,three-phase simultaneous-off overvoltage)will appear to break reactors frequently.Through the analysis on the phenomenon and waveform of many similar faults,the mechanism of overvoltage's occurance and many factors which affect the switching overvoltage are presented,together with the corresponding solutions.