Gas circuit breaker

A gas circuit breaker comprising:

• a movable electrode part and a fixed electrode part which are arranged to face each other in a manner where they engage and separate in a container air-tightly filled with an insulating gas;
• an operating mechanism attached to the outer side of a partition of the container and configured to output an operating force from an output part to the movable electrode part;
• an operating rod including one end attached to the movable electrode part;
• a first link including one end rotatably attached to the operating rod;
• a lever including one end rotatably attached to the first link;
• a support bearing which is fixed to the partition of the container via an insulating spacer;
• a second link including one end rotatably attached to the lever and the other end rotatably attached to the support bearing;
• a seal bearing configured to penetrate through the partition of the container;
• a seal rod which is rotatably attached to the lever in the vicinity of the center of the lever and is slidably supported to the seal bearing;
• and
• a third link including one end rotatably attached to the seal rod and the other end attached to the output part of the operating mechanism.