| 摘要 |
The purpose of the present invention is to provide a pressure diagnostic device for a vacuum valve with which safety and reliability of an opening and closing device in which a vacuum valve is mounted is improved. A pressure diagnostic device for diagnosing pressure in a vacuum valve, the pressure diagnostic device being provided with: a vacuum container having a vacuum in the interior thereof; a plurality of contact points disposed inside the vacuum container, the plurality of contact parts being separable from each other; and a floating-potential metal that is electrically insulated from the contact points, the pressure diagnostic device being characterized by being provided with a group of insulators configured by connecting the plurality of insulators at least partially in series, and a potential measurement device connected between the plurality of insulators, an insulator different from at least one insulator that belongs to the group of insulators and that is positioned on the side close to the floating-potential metal being connected to a voltage-clamp point during pressure diagnosis, the distance of an electroconductive material to the floating-potential metal is changed so as to be less during pressure diagnosis, the electroconductive material being connected to the at least one insulator of the group of insulators that is positioned on the side close to the floating-potential metal, and the insulator belonging to the group of insulators. |
