Patent ID: 7129430

Claim:
A low-voltage circuit breaker, comprising: at least one switching-on catch for initiating a switching-on process; at least one insertion mechanism, including an insertion shaft, for at least one of insertion of the circuit breaker into a withdrawable frame and removal of the circuit breaker from the withdrawable frame; and at least one power-transmitting system, connected to the insertion shaft, connectable to the switching-on catch such that the switching-on catch is movable to an activated state from a deactivated state at a defined unloading position of the movement, and is movable to the deactivated state from the activated state at a defined reset position in the movement, wherein the power-transmitting system includes a three-part linkage connected via a lever arm to a variable-length tensioning element, and wherein the variable-length tensioning element is connected to the insertion shaft.