The phenomena of delay discharge in vacuum circuit breaker(VCB)are related to their reliability and over-voltage.The mechanism and the treating methods are proposed in this paper.

• 真空断路弧后延时重击穿现象可能引起危险的过电压,破坏断路器的稳定运行。文中研究探讨了产生此现象的机理和应采取的对策。