| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum valve for a vacuum switch gear capable of preventing warpage of an electrode due to contact pressure during inputting in order to increase a breaking capacity without increasing an outer shape of the electrode, and reducing warpage of the electrode due to a difference of a thermal deformation amount during jointing.SOLUTION: The valve comprises a stationary electrode and a movable electrode opposed to each other in a vacuum vessel. The electrodes comprise a plate-like contact electrode brought into a contact and non-contact state to the opposite electrode side, a coil electrode for generating a vertical magnetic field, and an electrode rod and a reinforcing plate mounted to a center part of the contact electrode and a ring part of the coil electrode. The contact electrode includes a first region of a portion at which the reinforcing plate is mounted, and a second region that is the other portion. The contact electrode has a vertical cross sectional area (thickness) of the contact electrode formed larger as it approaches to an outer peripheral end of the contact electrode in the second region from a boundary portion of the first region and the second region. |
