Abstract: A control device, including a transmission shaft adapted to be coupled to an apparatus to be controlled, a driving disk mounted on said transmission shaft to rotate thereon and driven in rotation by a motor unit, a driven disk constrained to rotate with said transmission shaft, and a rotary member carrying at least one indexing means which, due to rotation of said rotary member, can be simultaneously engaged into two respective slots of said two disks for said transmission shaft to be driven in rotation, and can be disengaged from one of said slots for said transmission shaft to be locked against rotation.

Abstract: To control a switch apparatus having two interrupters, such as a busbar disconnector and a grounding disconnector, there is provided a rotary control shaft arranged away from, and at right angles to, the planes of straight line motion of the movable contacts, at least one disk cam fastened to the control shaft and having two distinct internal cam grooves, and two pairs of levers hinged to each other. One of the levers has one end hinged at a fixed point while its other end is hinged to the other lever, which is itself hinged to one of the movable contacts, a spigot being located between the two ends of each of the levers that has one end hinged at a fixed point, the spigot being engaged in one of the cam grooves so as to constitute a cam follower.

Abstract: An electrical insulator disk has central recesses and peripheral recesses to enable the disk to be mounted floatingly relative to flanges between which the disk is held and to a linear conductor that extends through the disk.

Abstract: An electric switch including a stationary contact that is annular. The switch comprises a gastight enclosure, a conductor bar of axis (D), a stationary contact presenting a contact zone of substantially annular shape, a switch element, e.g. on the conductor bar, that is movable in the axial direction of the axis (D) between a first position in which it penetrates in part into the stationary contact to establish electrical contact between the conductor bar and the stationary contact, and a second position in which it interrupts said contact. The stationary contact, which is in the form of a ring that is circular or elongate, such as elliptical, surrounds the conductor bar, at least in part.

Abstract: An assembly for a grounding disconnector, a grounding disconnector including the assembly and a method of manufacturing a grounding disconnector are described. The assembly includes a stationary grounding contact (12), a phase contact (14) suitable for being connected electrically to a busbar (8), moving connection means (16) suitable for putting the stationary grounding contact (12) and the phase contact (14) into electrical contact with each other, the stationary grounding contact (12), the phase contact (14) and the moving connection means (16) being mounted on a mounting plate (6).

Abstract: An electro-mechanical actuator having means for transmitting motion, in the final part of a stroke performed by a system comprising a worm shaft and rider nut coupled through gearing with an electric motor, to an auxiliary interrupter for breaking the power supply to the motor. Two control levers are provided, these being coupled together, and being rotated, about a perpendicular axis, by a cursor which is fixed to the nut that slides on the worm shaft. The pivoting of the said levers is blocked during the movement of the drive shaft driven by the system consisting of the worm shaft and nut. By contrast, the levers pivot during the final part of the movement of the cursor. The distance through which the levers move in pivoting is large enough to avoid any need for the auxiliary interrupter to be a high precision component.

Abstract: Supports for high or medium voltage electrical conductors (6, 7) at potentials different from the potential of an enclosure (1) are supported by disc-shaped parts (4, 5) made from thermoplastic polyester, for example terephthalate polyethylene. The discs (4 and 5) provide good insulation without largely disturbing the electrical field around the conductors due to their fairly low dielectric constant. They are also compatible with use under SF6 gas.

Abstract: A control device, including a transmission shaft adapted to be coupled to an apparatus to be controlled, a driving disk mounted on said transmission shaft to rotate thereon and driven in rotation by a motor unit, a driven disk constrained to rotate with said transmission shaft, and a rotary member carrying at least one indexing means which, due to rotation of said rotary member, can be simultaneously engaged into two respective slots of said two disks for said transmission shaft to be driven in rotation, and can be disengaged from one of said slots for said transmission shaft to be locked against rotation.

Abstract: This invention relates to the control of a switch apparatus having two interrupters, such as a busbar disconnector and a grounding disconnector. The invention provides: a rotary control shaft arranged away from, and at right angles to, the planes of straight line motion of the movable contacts; at least one disk cam fastened to the control shaft and having two distinct internal cam grooves; and two pairs of levers hinged to each other, with one of the levers of a given pair having one end hinged at a fixed point while its other end is hinged to the other lever of the same given pair, which is itself hinged to one of the movable contacts, a spigot being located between the two ends of each of the levers that has one end hinged at a fixed point, the spigot being engaged in one of the cam grooves so as to constitute a cam follower. The mechanism of the invention enables there to be an additional actuating ratio between the disk cam or cams and each associated movable contact.

Abstract: Operating mechanism for medium and high voltage switchgear, in which a rotatable main shaft is coupled to a switch, and a rocker plate is rotatable with the main shaft, the main shaft being arranged to open and close said switch by tilting the rocker plate. The rocker plate constitutes a plurality of force transmission levers and comprises a plurality of zones distributed around the main shaft. A rotary actuator has force transmitting means for driving the rocker plate in a direction corresponding to closing of the switch, and an opening spring for driving the rocker plate in a direction corresponding to opening of the switch. Closed switch locking means are coupled to the rocker plate (4) and are disposed substantially in a common plane of the rocker plate.

Abstract: An electrical insulator disk has central recesses and peripheral recesses to enable the disk to be mounted floatingly relative to flanges between which the disk is held and to a linear conductor that extends through the disk.

Abstract: Operating mechanism for medium and high voltage switchgear, in which a rotatable main shaft is coupled to a switch, and a rocker plate is rotatable with the main shaft, the main shaft being arranged to open and close said switch by tilting the rocker plate. The rocker plate constitutes a plurality of force transmission levers and comprises a plurality of zones distributed around the main shaft. A rotary actuator has force transmitting means for driving the rocker plate in a direction corresponding to closing of the switch, and an opening spring for driving the rocker plate in a direction corresponding to opening of the switch. Closed switch locking means are coupled to the rocker plate (4) and are disposed substantially in a common plane of the rocker plate.

Abstract: An electric switch including a stationary contact that is annular. The switch comprises a gastight enclosure (2), a conductor bar (8) of axis (D), a stationary contact (12) presenting a contact zone (22) of substantially annular shape, a switch element (40), e.g. on the conductor bar, that is movable in the axial direction of the axis (D) between a first position in which it penetrates in part into the stationary contact (12) to establish electrical contact between the conductor bar (8) and the stationary contact (12), and a second position in which it interrupts said contact. The stationary contact, which is in the form of a ring that is circular or elongate, e.g. elliptical, surrounds the conductor bar (8), at least in part.

Abstract: Assembly for a grounding disconnector, said assembly comprising a stationary grounding contact (12), a phase contact (14) suitable for being connected electrically to a busbar (8), moving connection means (16) suitable for putting the stationary grounding contact (12) and the phase contact (14) into electrical contact with each other, the stationary grounding contact (12), the phase contact (14) and the moving connection means (16) being mounted on a mounting plate (6). The present invention also provides a grounding disconnector including such an assembly, and to a method of manufacturing a grounding disconnector of the present invention.

Abstract: An actuator having a frame which is fixed to an electric motor; a gear drive for transmitting motion from the motor to a drive shaft between two predetermined positions, and a brake consisting of a coil spring, having, when relaxed, an inside diameter that is smaller than the outside diameter of a support shaft that is fixed relative to the gear drive, and around which the spring is coiled, each of the two free ends of the spring being arranged in a respective slot, formed in the frame.

Abstract: An electro-mechanical actuator having means for transmitting motion, in the final part of a stroke performed by a system comprising a worm shaft and rider nut coupled through gearing with an electric motor, to an auxiliary interrupter for breaking the power supply to the motor. Two control levers are provided, these being coupled together, and being rotated, about a perpendicular axis, by a cursor which is fixed to the nut that slides on the worm shaft. The pivoting of the said levers is blocked during the movement of the drive shaft driven by the system consisting of the worm shaft and nut. By contrast, the levers pivot during the final part of the movement of the cursor. The distance through which the levers move in pivoting is large enough to avoid any need for the auxiliary interrupter to be a high precision component.

Abstract: Supports for high or medium voltage electrical conductors (6, 7) at potentials different from the potential of an enclosure (1) are supported by disc-shaped parts (4, 5) made from thermoplastic polyester, for example terephthalate polyethylene. The discs (4 and 5) provide good insulation without largely disturbing the electrical field around the conductors due to their fairly low dielectric constant. They are also compatible with use under SF6 gas.

Abstract: A disconnection device is designed to separate a first portion of an electrical circuit electrically from a second portion of said circuit, the disconnection device including: at least one pair of contacts, one of which contacts is a moving contact, the pair of contacts having an open state and a closed state and a flexible conductor fixed at one end to the moving contact and serving to be fixed at the other end to one of the portions of the electrical circuit. The conductor comprises a flexible tube that is electrically conductive, at least at a surface portion thereof, and that has bending stiffness that is low enough to enable it to bend without kinking, and torsion stiffness that is high enough to enable it to take up a shape and a position that are substantially reproducible at least in the closed state. The device is used in particular in gas-insulated high-voltage electricity substations.

Abstract: A control device (10) for an electrical switchgear with three switching positions including a closed position, an open position and an earthing position. The switchgear includes a main shaft (14) and a drive shaft (28). The control device includes a mode selector lever (30) designed to select one operating mode among a motor driven switching mode, a manual switching mode between the open position and the closed position of the electrical switchgear, and a manual switching mode between the open position and the earthing position of the electrical switchgear. The mode selector lever has an opening with a curved contour, and the control device includes a cam disk (50) with a cam (54) capable of moving inside the opening (40). The control device may be applied to an isolating switch.

Abstract: A control device (10) for an electrical switchgear with three switching positions, of the type comprising a closed position, an open position and an earthing position, comprising a main shaft (14) and a drive shaft (28), comprises: a mode selector lever (30) designed to select one operating mode among the <<motor driven switching mode>>, the <<manual switching mode between the open position and the closed position of the electrical switchgear>> and the <<manual switching mode between the open position and the earthing position of the electrical switchgear>>, that comprises an opening with a curved contour, and a cam disk (50) with a cam (54) capable of moving inside said opening (40). Application to an isolating switch.