Abstract: A control device for controlling electrical switchgear such as a circuit breaker or the like includes an actuating arm having a connection point suitable for being moved along a closed line including points P1, P2 and P3. The connection point thus moves during an opening stage for opening the moving contact, under the effect of a mechanical spring from point P1 to point P2. It also moves during a re-cocking stage for re-cocking the mechanical spring under the effect of a motor being switched on, and while keeping the moving contact in the open position, from point P2 to point P3. It also moves during a closure stage for closing the moving contact, also under the effect of the motor being switched on, from point P3 to P1. In this manner it is possible to successively perform three distinct stages of putting the actuating arm in motion, between the instant at which the moving contact leaves its closed position and the instant at which it returns thereto after having occupied its open position.

Abstract: A high or very high voltage circuit breaker comprising, for each phase: at least two breaker chambers connected electrically in series and disposed parallel to each other in a metal tank, in which the ends of the chambers through which at least one pair of movable contacts of each chamber is driven lie in a common plane; and the mechanical transmission assembly whereby simultaneous movement is transmitted, and which ensures identical stroke lengths for the movements of the movable contacts of at least two chambers, comprises firstly at least two bars of identical lengths, each coupled to the pair of movable contacts of one of the chambers, and secondly, drive means coupled to at least one drive rod outside the tank or passing through its wall.

Abstract: This invention relates to a circuit breaker (1) for high or medium voltages, of the type having a drive bar (70) coupled to a drive member, and a circuit-breaking chamber (2) facing it and having two contacts (3, 4), each contact (3, 4) including a main contact (30, 40 respectively) and an arcing contact (31, 41 respectively), with one of the two contacts (3) being fixed to a blast or extinguishing nozzle (32). According to the invention, the second contact (4) and the drive bar (70) are joined together by coupling means (6) in such a way that they move together in translation in the same direction, the transmission means (5) being disposed on the side (21) of the chamber (2) that is adjacent to the drive bar (70), and are adapted to transmit the motion of the driven second contact (4) to the first contact (3).

Abstract: The invention relates to a control device for controlling electrical switchgear, the control device including an actuating arm (8) having a connection point (8b) suitable for being moved along a closed line (L) including points P1, P2, and P3: during an opening stage for opening the moving contact, under the effect of a 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 a 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 being switched on, from point P3 to P1.