Device for fixing a power circuit breaker in an insertion rack

An apparatus for fixing a power circuit breaker in a withdrawable-part rack, comprising:

• means for moving the power circuit breaker relative to the withdrawable-part rack;
• at least one locking device, associated with the withdrawable-part rack, for the power circuit breaker, said locking device being connected to a control rod, arranged movably on the withdrawable-part rack, for moving the control rod from at least one of a latched position to an unlatched position and an unlatched position to a latched position, the control rod interacting with the means for moving the power circuit breaker relative to the withdrawable-part rack;
• and
• a release device, movable by movement of the power circuit breaker, from at least one of a blocked position for the control rod to a released position for the control rod and from a released position to a blocked position, the locking device being adapted to moves to the unlatched position when the power circuit breaker is inserted and withdrawn from the withdrawable-part rack, and the control rod being held in the blocked position by the release device, and, when the power circuit breaker is inserted in the withdrawable-part rack, the released position for the control rod for triggering the movement of the locking device to the latched position is assumed by the release device only shortly before the inserted position of the power circuit breaker.