| 摘要 |
<p>It is possible to detect deterioration in the degree of vacuum within a vacuum container, even at a high pressure at which no electrical discharge is generated in the vacuum container. A device (8) for detecting deterioration in the degree of vacuum of a hermetic opening and closing device that has a hermetic container (1), the hermetic container enclosing a vacuum container (2) in which an opening and closing part is accommodated in the interior of the hermetic container, and an insulating gas being sealed between the hermetic container and the vacuum container (2), wherein the device is provided with: a sensor device (9) disposed in the hermetic container (1), and having at least one sensor from among a temperature sensor for detecting the temperature inside the hermetic container (1), a pressure sensor for detecting pressure, and a gas density sensor for detecting the gas density of the insulating gas; and a signal processing section (10) having a determining means that, through arithmetic processing of a detection signal from the sensor device (9), determines whether there is deterioration of the vacuum within the vacuum container (1).</p> |
