| 摘要 |
An isolator container is provided with a view window having an oval shape with the long diameter in the direction of an axis. The view window is provided at a position facing a movable contact of an isolator, or at a position facing a contact point between the movable contact of the isolator and a fixed contact of the isolator; and at least the contact point is within a visible range therethrough. The length of the long diameter of the view window is set such that surfaces of insulating spacers are within the visible range of the view window. Because of this configuration, surface states of the insulating spacers and a connection status of the movable contact in the isolator container can be observed without increasing the number of view windows. |
