MOLD VACUUM VALVE AND METHOD FOR TESTING THE SAME

摘要

PROBLEM TO BE SOLVED: To shorten the operation time period by reducing the number of times of a partial discharge test applied to a mold vacuum valve. SOLUTION: The mold vacuum valve includes: a vacuum insulation container 1; a pair of attachable/detachable contacts 5 and 6 stored in the vacuum insulation container 1; a fixed-side current-carrying shaft 4 connected to one contact 5; a movable-side current-carrying shaft 7 connected to the other contact 6; an insulating layer 10 provided on an outer periphery of the vacuum insulation container 1; and a ground layer 11 provided on an outer periphery of the insulating layer 10. In the movable-side current-carrying shaft 7, an open-circuit testing position 13 is provided for indicating that the status between the contacts 5 and 6 is open-circuit at a predetermined gap. COPYRIGHT: (C)2011,JPO&INPIT