Patent ID: 8471159

Claim:
An undercarriage for use with a circuit breaker, said undercarriage comprising: a bottom plate; a front beam removably coupled to said bottom plate; a lead screw configured to engage with a threaded support that is coupled to said bottom plate to facilitate racking the circuit breaker in a switchgear; and a keylock assembly configured to enable racking the circuit breaker in the switchgear, said keylock assembly comprising: a lock; an interlock configured to couple to said lock such that said interlock is movable between a locked position and an unlocked position, wherein engagement of a racking handle with said lead screw is enabled when said interlock is in the unlocked position; and wherein said lock comprises an arm and a gear configured to move said arm between a first position and a second position, and wherein said interlock is in the locked position when said arm is in the first position, and said interlock is in the unlocked position when said arm is in the second position.