| 摘要 |
<p>A power opening/closing device provided with a vacuum switch tube positioned in a grounded tank and coupled with an operating mechanism, a moving-side insulating supporter positioned in the grounded tank and used for supporting the moving side of the vacuum switch tube, a stationary-side insulating supporter positioned in the grounded tank and used for supporting the stationary side of the vacuum switch tube, a moving-side terminal conductor connected on one side to the moving side of the vacuum switch tube and extended on the other side above the grounded tank via a moving-side porcelain bushing, and a stationary-side terminal conductor connected on one side to the stationary side of the vacuum switch tube and extended on the other side above the grounded tank via a stationary-side porcelain bushing, wherein a surge suppressor positioned in the grounded tank and connected to a main circuit of the vacuum switch tube is provided, the surge suppressor is positioned so as to maintain airtightness within a conic insulator arranged so as to protrude into the grounded tank through an opening provided to part of the grounded tank, and the surge suppressor is positioned on the bottom or the side of the grounded tank.</p> |
