Draw-in and draw-out mechanism of an electrical circuit breaker with main and auxiliary circuits

A reversible draw-in and draw-out mechanism for an extractible multipole electrical circuit breaker, equipped with main circuits with terminals and auxiliary circuits associated with a connection device having fixed connectors and interacting movable connectors, the circuit breaker being mounted on a movable mechanical support inside a fixed chassis in the form of a housing having a front opening, two opposite side walls, and a fixed rear support panel for connection of the main terminals of each pole, the mechanical support of the circuit breaker being guided by means of a pair of slide plates symmetrically fixed to the side walls of the chassis, and extending parallel in the longitudinal draw-in direction, said mechanism comprising an operating device associated with a movement transmission system capable of occupying a first "drawn-in" position in which the main ad auxiliary circuits of the circuit breaker are connected, a second "test" position in which the main circuits are disconnected and the auxiliary circuits are connected, and a third "drawn-out" position in which the main and auxiliary circuits are disconnected, wherein the fixed connectors of the auxiliary circuits connection device are securedly united to the circuit breaker and the movement transmission system of the reversible mechanism comprises a first mechanical link between the operating device and a drive device of the movable connectors of the connection device during the actuation phase corresponding to the interval provided between the second and third positions, and a second mechanical link between the operating device and a coupling device of the movable mechanical support of the circuit breaker during another actuation phase corresponding to the interval provided between the second and first positions, the assembly being arranged so that the first mechanical link is active when the second mechanical link is broken, and the second mechanical link is active when the first mechanical link is broken, thereby enabling the fixed and movable connectors of the auxiliary circuits to be connected or disconnected when the circuit breaker remains immobile.