A racking mechanism assembly for a draw out circuit breaker comprising: an enclosure; a cross shaft movably disposed in the enclosure; at least one input link in operable communication with the cross shaft at one end of the at least one input link ; at least one racking cam rotatably disposed in the enclosure, each racking cam having at least one cam slot configured to receive a portion of the circuit breaker , wherein movement of the cross shaft about an axis of the cross shaft is capable of moving the at least one racking cam from an open position toward a closed position with the portion of the circuit breaker disposed in the at least one cam slot , thereby securing the circuit breaker in the enclosure when the circuit breaker is racked into the enclosure and the at least one racking cam is in the closed position, wherein each cam slot comprises: a first cam slot profile having a first moment arm , capable of accelerating the circuit breaker toward a connection face ; a second cam slot profile having a second moment arm shorter than the first moment arm , capable of engaging the circuit breaker with the connection face ; and a third cam slot profile having a substantially zero moment arm, capable of locking the circuit breaker in a desired position, characterized in that at least one transfer link is pivotably connected at another end of the at least one input link ; and the at least one racking cam is pivotably connected with the transfer link , such that rotation of the at least one input link drives opposite rotation of the at least one racking cam via the transfer link . an enclosure; a cross shaft movably disposed in the enclosure; at least one input link in operable communication with the cross shaft at one end of the at least one input link ; at least one racking cam rotatably disposed in the enclosure, each racking cam having at least one cam slot configured to receive a portion of the circuit breaker , wherein movement of the cross shaft about an axis of the cross shaft is capable of moving the at least one racking cam from an open position toward a closed position with the portion of the circuit breaker disposed in the at least one cam slot , thereby securing the circuit breaker in the enclosure when the circuit breaker is racked into the enclosure and the at least one racking cam is in the closed position, wherein each cam slot comprises: a first cam slot profile having a first moment arm , capable of accelerating the circuit breaker toward a connection face ; a second cam slot profile having a second moment arm shorter than the first moment arm , capable of engaging the circuit breaker with the connection face ; and a third cam slot profile having a substantially zero moment arm, capable of locking the circuit breaker in a desired position, a first cam slot profile having a first moment arm , capable of accelerating the circuit breaker toward a connection face ; a second cam slot profile having a second moment arm shorter than the first moment arm , capable of engaging the circuit breaker with the connection face ; and a third cam slot profile having a substantially zero moment arm, capable of locking the circuit breaker in a desired position, characterized in that at least one transfer link is pivotably connected at another end of the at least one input link ; and the at least one racking cam is pivotably connected with the transfer link , such that rotation of the at least one input link drives opposite rotation of the at least one racking cam via the transfer link . <EOS>