Circuit breaker operating mechanism equipped with a stored energy system having removable and replaceable closing spring mechanisms

An operating mechanism of a high-rating multipole electrical circuit breaker, each pole having a pair of separable contacts including a movable contact actuated between a closed position and an opened position, said mechanism comprising:

• a toggle device associated with a trip member and an opening spring for moving the movable contact towards the opened position, charging of the opening spring being carried out automatically when a closing operation is performed,
• a stored energy system with an elastic device comprising at least one closing spring arranged to move the movable contact to the closed position,
• a rotatable recharging cam located in a charged position for charging said closing spring, and in a discharged position for allowing said closing spring to be decompressed,
• a closing pawl cooperating with a latching bolt to lock the cam in the charged position, and to unlock the cam in the discharged position,
• a kinematic transmission chain cooperating with said recharging cam and having a drive lever arranged between said stored energy system and the toggle device,
• a telescopic link of said stored energy system having two parts with relative movement between which said closing spring is fitted,
• a removable blocking device capable of locking said telescopic link when the two parts approach one another for the compression of said closing spring at the end of charging travel, and
• a sub-assembly including said telescopic link and the compressed closing spring, which can be removed from the stored energy system upon release of said cam when the closing pawl is unlocked so as to cause a break in the kinematic transmission chain with the toggle device.