Patent
Vacuum monitor for vacuum interrupter and use of the vacuum monitor
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TLDR
In this paper, a vacuum monitor for a vacuum interrupter which can detect a poor vacuum pressure from the outside of the interrupters on the basis of the electromagnetic wave signals generated by the electric discharge existing in accordance with a pre-breakdown voltage depending upon Pashen's law was presented.Abstract:
A vacuum monitor for a vacuum interrupter which can detect a poor vacuum pressure from the outside of the interrupter on the basis of the electromagnetic wave signals generated by the electric discharge existing in accordance with a prebreakdown voltage depending upon Pashen's law when vacuum pressure increases within the vacuum interrupter. Since the above-mentioned electric discharge is quite different from so-called partial discharge, even when the fixed and movable contacts are kept closed (i.e. under hot-like condition), it is possible to detect poor vacuum pressure on the basis of the electric discharge existing between the fixed (8) and movable (9) contact rods including two contacts (10, 13) and the main shield (16), as well as when the two contact are kept opened. The vacuum monitor according to the present invention comprises a rod or loop antenna (21) fixedly or movably disposed near a conductive material of or connected to the vacuum interrupter and a detection section (20) including, in particular, a 2 to 20 kHz band-pass filter (24).read more
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Patent
Apparatus for monitoring the vacuum of a vacuum switch
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Patent
Vacuum monitor for vacuum interrupter
Shuzo Tanigaki,Masayuki Sakari +1 more
TL;DR: In this article, the authors proposed a vacuum monitor for a vacuum interrupter which can detect poor vacuum pressure at high detection sensitivity from the outside of the interrupters, on the basis of the impulsive electromagnetic wave signals generated when vacuum pressure increases within the vacuum Interrupter.
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Patent
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