Tripping device for pre-selection of function for electrical equipment

A tripping device having two selectable configurations comprising electromechanical control means having energized and deenergized states and including a mobile member having retracted and extended positions related to the state of the electromechanical control means, striker means operatively coupled to said mobile member for operating a circuit breaker depending upon the state of said electromechanical control means, displaceable locking means having a lock position for holding the striker means in a locked position, and coupling means between the mobile member and said locking means for displacing the locking means, upon change of energization state of the electromechanical control means, from said lock position to a release position in which the striker means can trip the circuit breaker, said electromechanical control means in one configuration of the tipping device going from energized to deenergized state and in a second configuration going from deenergized to energized state, said striker means including a projecting part forming a catch which engages with said locking means such that the striker means is held in locked position, said projecting part being movable between first and second positions, corresponding to the first and second configurations, in which said projecting part respectively engages said locking means with the latter in lock position and is released therefrom when the locking means moves to release position such that solely by moving the projecting part between said first and second positions the tripping device is placed into the selected configuration.