Vacuum valve and method for manufacturing vacuum circuit breaker

A vacuum valve that can be incorporated into a vacuum circuit breaker, the vacuum valve comprising:

• a cylindrical vacuum vessel;
• a cylinder disposed coaxially with the vacuum vessel;
• a partition wall provided between an end of the vacuum vessel and an end of the cylinder, the partition wall separating an inside of the vacuum vessel from an inside of the cylinder;
• a movable conductor penetrating the partition wall, the movable conductor being movable in an axial direction in the vacuum vessel and the cylinder;
• a fixed contact fixed inside the vacuum vessel;
• a moving contact integrated with the movable conductor, the moving contact being capable of separating from the fixed contact and coming into contact with the fixed contact in association with movement of the movable conductor;
• a lid adapted to cover an end of the cylinder, the end being on a side opposite to the partition wall;
• a connecting rod penetrating the lid and coupled to the movable conductor via an insulator;
• and
• a holder adapted to hold the connecting rod while preventing movement of the connecting rod toward the fixed contact in a state where the moving contact is separated from the fixed contact, wherein
• the holder is removable in a state where the connecting rod is connected to a manipulator that opens and closes the vacuum circuit breaker by causing the connecting rod to operate, wherein
• the holder includes:
• a retainer detachably attached to the lid, the retainer holding a portion of the connecting rod, the portion protruding from the lid to an outside of the cylinder;
• and
• a fastener detachably attached to the connecting rod,
• the connecting rod is held in a state where a part of the connecting rod protrudes from an end of the retainer, the end being on a side opposite to the lid, and
• the fastener is attached to the part of the connecting rod protruding from the retainer, and prevents movement of the connecting rod by coming into contact with the retainer, wherein
• a distance between the fastener and an end of the retainer, the end being on a side on which the lid is located is longer than a distance between the fixed contact and the moving contact when the fastener is in contact with the retainer.