METHOD TO DETERMINE THE PRESSURE INSIDE OF A VACUUM INTERRUPTER, AND VACUUM INTERRUPTER ITSELF
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United States of America Patent
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Jan 25, 2016
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Jul 26, 2013
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Abstract
A method to determine pressure inside a vacuum interrupter for medium or high voltage use, having at least one fixed contact piece and at least one movable contact piece arranged inside the technical vacuum of a vacuum interrupter, and wherein contact pieces are electrically connected to external electrical fixation points can implement a high accuracy pressure sensing in rough conditions inside a vacuum interrupter, without additional components internally to the vacuum interrupter, by connecting the external electrical fixation points with an external electrical energy source, and in the disconnected or open position of the vacuum interrupter, the effect of a cold cathode vacuum gauge will be used, in that the leakage current between the open contacts generates an x-ray induced ionization of the rest-gas inside the vacuum interrupter, and the resulting current is measured with high resolution, in order to determine by this current the rest-gas pressure inside the vacuum interrupter.
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