Draw-out molded case circuit breaker

A draw-out low-voltage circuit breaker assembly, comprising:

• a connecting base comprising stationary draw-in contacts and a fixed cam;
• a circuit breaker which is movable between a drawn-in and a drawn-out position with respect to the connecting base, said circuit breaker comprising movable draw-in contacts for electrical connection to said stationary draw-in contacts in the drawn-in position, a molded case having a rigid bracket extending from a rear face of the molded case, said molded case housing breaking contacts and an operating mechanism connected to said breaking contacts for opening and closing said breaking contacts, and trip device means for opening the breaking contacts when a fault occurs;
• and
• draw-out breaking means for opening said breaking contacts via said trip device means upon separating the circuit breaker from the connecting base, said draw-out breaking means comprising a transmission lever having one end coupled to said trip device means, a rocker pivotally mounted to said rigid bracket and having first and second arms, said first arm being articulated to a second end of the transmission lever and said second arm bearing a pin member;
• wherein upon separating the circuit breaker from the connecting base, said pin member engages said fixed cam thereby rotating said rocker and sliding said transmission lever to engage said trip device means and open said breaking contacts, and wherein in the drawn-out position, said transmission lever is disengaged from said trip device means, enabling said circuit breaker to be freely opened and closed.