| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit the reduction of a contact area and the increase of contact resistance even if a contact surface is melted and solidified to form an irregular part during current interruption. <P>SOLUTION: A vacuum valve has a pair of contacts which contact with or separate from each other. Each contact is composed of: a contact plate 10a capable of contacting with or separating from the other contact; a cup shaped electrode 2a to which an outer peripheral part of the contact plate 10a is fixed; multiple slits 3a each of which is provided on a peripheral surface of the electrode 2a so as to obliquely cross in the axial direction; an annular first reinforcement member 11a provided between an anti-contact surface 10a1 of the contact plate 10 and a bottom surface 2a1 of the electrode 2a; and a second reinforcement member 12a provided at the inner side of the first reinforcement member 11a so as to form a predetermined gap with at least one of the anti-contact surface 10a and the bottom surface 2a1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
