| 摘要 |
<p>The present invention comprises: a vacuum valve, which is housed in the interior part of a pressure tank wherein an insulating gas is sealed, and which is configured such that it is possible for contact and detachment to occur between a fixed-side electrode which is disposed on a fixed-side electricity-supply shaft, and a movable-side contact point which is disposed on a movable-side electricity-supply shaft; a switch means which is disposed to be coaxial with the movable-side electricity-supply shaft, for driving the movable-side electricity supply shaft; and a chattering suppression structure which is disposed on the fixed side of the vacuum valve to be coaxial with the fixed-side electricity-supply shaft, and which suppresses chattering. The switch means is configured from: an electromagnetic operation mechanism which drives the movable-side electricity supply shaft by supplying electricity thereto; a pressure spring which is positioned coaxially with the electromagnetic operation mechanism, and which applies contact pressure to the movable-side contact point and a fixed-side contact point when the vacuum valve is closed; and a release spring which is positioned coaxially with the electromagnetic operation mechanism, and which supplements the drive force of the electromagnetic operation mechanism when the vacuum valve is opened.</p> |
