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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灭弧室内部压力的影响

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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：由于电弧对高纯度表面和结合的残留气体的影响，电流中断操作可能会影响真空灭弧室（VIs）的内部压力。在本文中，我们使用磁控管方法非侵入式地研究了电流中断操作后立即在VI中内部压力的时间变化。通过由真空测试系统组成的实验测试装置来改变带有活性吸气剂材料的穿孔，非通风VI的内部压力，在内部压力和电弧放电时间变化的情况下进行了一系列实验测试。实验结果表明，中断操作期间的电弧放电主要会导致内部压力显着降低两个数量级，这取决于当前中断操作之前的电弧放电时间和初始压力。我们还将讨论所观察到的减压效果对预测已安装VI的剩余使用寿命的可能性的影响。

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