Grading capacitors are required to balance the voltage distribution of the double-break vacuum circuit breaker. However, large grading capacitors increase the magnitude and duration of the reignition current. To reduce grading capacitors, a synthetic circuit with double vacuum breaks was set up to study the effects of arcing time on voltage distribution. The voltage distribution of the upper break decreases from 61% to 52% with arcing times of two breaks decreasing from 6.6 to 3.4 ms synchronously. The experimental results demonstrate that reducing the arcing times can balance the voltage distribution during the transient recovery voltage (TRV) rising phase. The unbalance of TRV distribution can be further improved by adopting appropriate arcing times in the two breaks with grading capacitors having a capacitance of 3000 pF.

中文翻译：

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电弧恢复时间对瞬态恢复电压上升阶段双断路真空断路器电压分布的影响

需要使用分级电容器来平衡双断点真空断路器的电压分布。但是，大的分级电容器会增加点火电流的大小和持续时间。为了减少分级电容器，建立了具有两次真空中断的合成电路，以研究电弧放电时间对电压分布的影响。上中断的电压分布从61％降低到52％，两个中断的电弧放电时间从6.6毫秒同步降低到3.4毫秒。实验结果表明，减少电弧放电时间可以平衡瞬态恢复电压（TRV）上升阶段的电压分布。通过在两个中断中采用适当的电弧放电时间（电容为3000 pF的分级电容器），可以进一步改善TRV分布的不平衡。