Abstract: A protection unit, including a power switching device, with a mechanical switch. To improve the multipurpose nature of the power switching while making lockout easier and more reliable, provision is made for the power switching device to include an electrical actuator actuating the mechanical switch and being controlled by an electronic control unit, which is itself powered via an auxiliary switching device. A lockout system with a lock is provided, which, in a lockout configuration, mechanically keeps the mechanical switch and the auxiliary switching device in an isolation configuration, and, in operating configuration, allows the mechanical switch and the auxiliary switching device to move between the conduction configuration and the isolation configuration.

Abstract: A thermomagnetic trip assembly includes a thermal trip, a magnetic trip, and first and second actuation levers. The thermal trip includes a bimetal strip that is capable of deforming in order to actuate the first actuation lever. The magnetic trip includes a movable armature, a fixed armature and an electrical conductor. The movable armature is capable of moving in order to actuate the second actuation lever. The electrical conductor and the bimetal strip are electrically connected in series with one another between first and second connection terminals of the trip assembly. The movable armature is connected to the first connection terminal, the fixed armature is connected to the second connection terminal, and the respective contact areas of the fixed armature and of the movable armature are made of electrically conductive materials that exhibit a low degree of mutual weldability.

Abstract: A switchgear for an electric current includes a switching assembly that can be switched between an open state and a closed state; a control mechanism including a trigger member for triggering the switching of the switching assembly to the open state; a housing including lateral walls. The lateral walls are elastically deformable when the pressure prevailing inside the housing increases, one of the lateral walls including, on its inner face, a rigid protuberance, the deformation of the wall causing a displacement of the protuberance, the protuberance being arranged relative to the trigger member such that its displacement results in the displacement of the trigger member to its triggering position.

Abstract: A thermomagnetic trip assembly includes a thermal trip, a magnetic trip, and first and second actuation levers. The thermal trip includes a bimetal strip that is capable of deforming in order to actuate the first actuation lever. The magnetic trip includes a movable armature, a fixed armature and an electrical conductor. The movable armature is capable of moving in order to actuate the second actuation lever. The electrical conductor and the bimetal strip are electrically connected in series with one another between first and second connection terminals of the trip assembly. The movable armature is connected to the first connection terminal, the fixed armature is connected to the second connection terminal, and the respective contact areas of the fixed armature and of the movable armature are made of electrically conductive materials that exhibit a low degree of mutual weldability.

Abstract: A switchgear for an electric current includes a switching assembly that can be switched between an open state and a closed state; a control mechanism including a trigger member for triggering the switching of the switching assembly to the open state; a housing including lateral walls. The lateral walls are elastically deformable when the pressure prevailing inside the housing increases, one of the lateral walls including, on its inner face, a rigid protuberance, the deformation of the wall causing a displacement of the protuberance, the protuberance being arranged relative to the trigger member such that its displacement results in the displacement of the trigger member to its triggering position.

Abstract: An auxiliary apparatus is coupled to an electric circuit breaker. In the open position, the breaker interrupts the circulation of a current in an electrical connection, which includes at least one electrical conductor and a mechanical output member movable between an operating position and a stop position associated with the interruption of the circulation of the current in the connection after opening of the breaker. The auxiliary apparatus includes at least one current sensor to measure the current circulating in a respective conductor, and a mechanical coupler to couple with the mechanical output member. The mechanical coupler also detects the opening of the breaker. The auxiliary apparatus also includes a device for determining a cause of the detected opening, based on the intensity measured by the current sensor.

Abstract: The auxiliary apparatus according to the invention may be coupled to an electric circuit breaker. In the open position, the breaker is able to interrupt the circulation of a current in an electrical connection, the connection including at least one electrical conductor, and it includes a mechanical output member movable between an operating position and a stop position associated with the interruption of the circulation of the current in said connection after opening of the breaker. The auxiliary apparatus includes at least one current sensor, each current sensor being able to measure the current circulating in a respective conductor, and a mechanical coupling means for mechanical coupling with the mechanical output member, the mechanical coupling means forming means for detecting the opening of the breaker. The auxiliary apparatus further comprises a device for determining a cause of the detected opening, based on the intensity measured by each current sensor.