| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening/closing device which opens and closes a cable way of a power system and prevents abrasion of a contact point and opening failure due to metal particles generated by arc.SOLUTION: Disclosed is an opening/closing device 20 in which a movable contact point 1 having a finger contact 1a provided therein moves inside of a cylindrical fixed contact point 2 in the axial direction. In an insulation part 3 of the outer peripheral part of the fixed contact point 2, an insulation crown part 3a is formed having a through-hole 3c through which the movable contact point 1 penetrates so as to cover the end 2a of the fixed contact point 2. The inner diameter Dof the through-hole 3c is smaller than the outer diameter Dof the finger contact 1a. |
