| 摘要 |
PROBLEM TO BE SOLVED: To improve insulating characteristics of a vacuum bulb to which a voltage sharing element is connected. SOLUTION: The vacuum switching device comprises vacuum insulating containers 2a, 2b connected by an intermediate fitting 3, a fixed side sealing fitting 4 sealed at the opening part on one end of the vacuum insulating containers 2a, 2b, a movable side sealing fitting 5 sealed at the opening part at the other end, a pair of contacts 7, 9 capable of contacting and separating, an arc shield fixed to the intermediate fitting 3, voltage sharing elements 16a, 16b respectively connected between the fixed side sealing fitting 4 and the intermediate fitting 3, and between the intermediate fitting 3 and the movable side sealing fitting 5, and an operating mechanism 19. The voltage sharing elements 16a, 16b are arranged along the surface in axial direction of the vacuum insulating containers 2a, 2b so that the electric field strength between the voltage sharing elements 16a, 16b and the vacuum insulating containers 2a, 2b may be suppressed, and are separated from the vacuum insulating containers 2a, 2b with a prescribed insulating distance. COPYRIGHT: (C)2006,JPO&NCIPI
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