Abstract: A drive rod (15) connects a moveable contact element (10) of a compressed-gas cutout (1) with a drive (20). A disconnecting braking structure (22) is provided for braking the drive rod (15) and the switch parts moved with the latter in the final phase of a disconnecting action. The disconnecting braking structure (22) comprises a track (48, 49, 50) assigned to the drive rod (15) and an adjustable guided roller (42 or 43) cooperating with the track (48, 49, 50) against the force of a spring (47). The track (48, 49, 50) has two track sections (48, 49), that are arranged parallel to a switch axis (y) and in tandem, whereas the top track section (49) has a greater distance to the switch axis (y) than the bottom track section (48), and a connecting section (50). The rollers (42 or 43) are pressed back at the disconnecting movement of the drive rod (15) against the force of the spring (47) while simultaneously exerting braking force on the drive rod (15).

Abstract: The present invention relates to a circuit-breaker including, inside a casing filled with a dielectric gas, a first arcing contact connected to a first terminal, and a second arcing contact having the same longitudinal axis as the first contact. The second arcing contact is connected to a second terminal, is mounted to move axially in a fixed cylinder, and co-operates with a moving piston to form a compression chamber. The circuit-breaker further includes a mechanism for driving the piston in a direction that is opposite to the direction in which the second contact is displaced. The driving mechanism acts during a first portion of the displacement of the moving contact from the closed position to the open position the circuit-breaker also includes a mechanism for constraining the piston to move with the moving contact during a second portion of the same displacement of the moving contact.

Abstract: A Rogowski coil is used as a precise current and temperature measuring device (in particular a device that is highly insensitive to temperature variations). The Rogowski coil is of the type including at least one printed circuit plate provided with a circular cutout. The coil is implemented by metal deposits on each of the two faces of the plate and extending along radii such that geometrical projections thereof pass through the center of the cutout. Electrical connections between the radii on one face and those on the opposite face are implemented by plated-through holes that pass through the thickness of the plate.