Patent ID: 6884949

Claim:
A main switch conveying apparatus for a vacuum circuit breaker installed in a cage having electrical load and source terminals, the main switch conveying apparatus comprising: a carriage for conveying the main switch loaded on the carriage in such a manner that the main switch is coupled to or separated from the terminals; a carriage actuating assembly including a lead screw for providing a driving force to move the carriage and provided with braking recesses at the predetermined positions on the lead screw in such a manner that the carriage is stopped at a test position, a safety position and a run position of the main switch, and a conveying nut fixed on the carriage to mesh with the lead screw and movable together with the carriage relatively to the lead screw; a girder assembly detachably supported on both front sidewalls of the cage for supporting one end of the lead screw to rotate; a brake assembly installed on the carriage for stopping the carriage by locking the lead screw at positions of the braking recesses; and a brake releasing assembly for releasing the locking of the brake assembly to allow the carriage to move again.