Control device for controlling electrical switchgear

A control device (1) for controlling electrical switchgear including a moving contact that is suitable for occupying a closed position and an open position, said control device being designed to move said moving contact and comprising a motor (10), a mechanical spring (12) and an actuating arm (8) having a first connection point (8a) and a second connection point (8b), said control device being characterized in that said actuating arm (8) is suitable for occupying a closure position making it possible to place the moving contact in its closed position and in which the second connection point (8b) is situated at a point P1, an opening position making it possible to place the moving contact in its open position and in which the second connection point (8b) is situated at a point P2 that is distinct from P1, and a re-cocked position in which the second connection point (8b) is situated at a point P3 that is distinct from P2 and P1, said control device being designed so that said second connection point (8b) can be moved successively along a closed line (L) including said points P1, P2, and P3:

• during an opening stage for opening the moving contact, under the effect of said mechanical spring (12), from point P1 to point P2;
• during a re-cocking stage for re-cocking the mechanical spring (12), under the effect of the motor (10) being switched on, and while keeping the moving contact in the open position, from point P2 to point P3;
• and
• during a closure stage for closing the moving contact, also under the effect of the motor (10) being switched on, from point P3 to P1.