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Reignition phenomena after high-frequency current interruption with short vacuum gaps

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1 Author(s)
Weinert, H. ; Inst. fur Hochspannungstechnik, Tech. Hochschule Aachen, Germany

Based on a large number of measurements of high-frequency (HF) current interruptions in vacuum at small contact gaps (⩽600 μm), the statistical reignition behavior of vacuum switching devices after a HF current zero is investigated. Three types of reignitions can be classified. Statistical evaluation of post-arc current measurements for different parameters at current zero and different HF current ignition processes gives information about the stress of the gap as a result of the transient recovery voltage after a HF current zero (HF-TRV) and the accumulated post-arc charge. Comparing post-arc current values at the beginning of the HF-TRV and at the moment of reignition reveals a production of charge carriers during the recovery interval. Possible reasons for the different types of reignitions are discussed

Published in:

Plasma Science, IEEE Transactions on  (Volume:27 ,  Issue: 4 )

Date of Publication:

Aug 1999

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