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The influence of current interruption operations on internal pressure in vacuum interrupters

机译：电流中断操作对真空断电器内部压力的影响

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Due to the impact of arcing on the high purity surfaces and bound residual gases, current interruption operations may influence the internal pressure in vacuum interrupters (VIs). In this paper, we investigate the temporal development of internal pressure in VIs immediately after a current interruption operation, non-intrusively using the magnetron method. By means of an experimental test setup that consists of a vacuum test system to vary the internal pressure in punctured, non-vented VIs with active getter materials, experimental test series were performed under variation of internal pressure and arcing time. The experimental results indicate that arcing during the interruption operation predominantly causes a significant decrease in the internal pressure of up to two orders of magnitude, depending on the arcing time and the initial pressure before the current interruption operation. We also discuss the impact of the observed pressure reduction effect on the possibility of predicting the remaining service life of installed VIs.
机译：由于电弧的高纯度的表面和结合的残余气体上的影响，电流中断操作可能会影响在真空灭弧室的内部压力（VIS）。在本文中，我们调查的VI内部压力随时间的变化，电流切断操作后，非侵入利用磁控管方法。通过实验测试装置，它由一个真空测试系统，以改变在穿刺后，非通风的VI与活性吸气材料的内部压力的装置，实验测试系列中在内部压力下和电弧时间的变化来执行。实验结果表明，在中断操作期间电弧主要引起向上的内部压力的减少显著到两个数量级，这取决于飞弧时间和电流切断操作之前的初始压力。我们还讨论了对预测的VI安装的剩余使用寿命的可能性所观察到的减压效果的影响。

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