Abstract: A damping device for a shaft in rotation around an axis of rotation parallel to a direction (A). The said damping device includes a support, a plate, a collar, and clamping means. The said support is stationary and is provided with a first opening, with the said plate being provided with a second opening and the said collar being provided with a third opening. The said shaft passes simultaneously through the said first, second, and third openings with, respectively, a first radial gap, a second radial gap, and a third radial gap, with the said third radial gap being smaller than the said first and second radial gaps. The said collar is movable with respect to the said support in a plane perpendicular to the said direction (A), with the said clamping means pressing the said plate against the said collar and the said collar against the said support.

Abstract: A damping device for a shaft in rotation around an axis of rotation parallel to a direction (A). The said damping device includes a support, a plate, a collar, and clamping means. The said support is stationary and is provided with a first opening, with the said plate being provided with a second opening and the said collar being provided with a third opening. The said shaft passes simultaneously through the said first, second, and third openings with, respectively, a first radial gap, a second radial gap, and a third radial gap, with the said third radial gap being smaller than the said first and second radial gaps. The said collar is movable with respect to the said support in a plane perpendicular to the said direction (A), with the said clamping means pressing the said plate against the said collar and the said collar against the said support.

Abstract: A rotor blade (1) provided with an outer covering (2) and with at least one load take-up spar (10) associated with at least one pin-receiving bushing (3). Each spar (10) is a compartmentalized spar comprising centrifugal force take-up means (20) incorporated within a twisting stress take-up casing (30), said centrifugal force take-up means (20) comprising at least two boxes (21, 22), each having said pin-receiving bushing (3) of the spar (10) passing therethrough, each box (21, 22) including a closed retention belt (23) extending in the spanwise direction of the blade, the retention belt (23) of one box (22) surrounding the retention belt (23) of another box (21), each retention belt (23) being provided with unidirectional fibers (24) wound around said pin-receiving bushing (3), said casing (30) being provided with inclined fibers (31) presenting an angle relative to said unidirectional fibers (24).

Abstract: A rotor blade (1) provided with an outer covering (2) and with at least one load take-up spar (10) associated with at least one pin-receiving bushing (3). Each spar (10) is a compartmentalized spar comprising centrifugal force take-up means (20) incorporated within a twisting stress take-up casing (30), said centrifugal force take-up means (20) comprising at least two boxes (21, 22), each having said pin-receiving bushing (3) of the spar (10) passing therethrough, each box (21, 22) including a closed retention belt (23) extending in the spanwise direction of the blade, the retention belt (23) of one box (22) surrounding the retention belt (23) of another box (21), each retention belt (23) being provided with unidirectional fibers (24) wound around said pin-receiving bushing (3), said casing (30) being provided with inclined fibers (31) presenting an angle relative to said unidirectional fibers (24).

Abstract: A system and method for measuring voltage of a medium to high voltage line conductor is disclosed. The system includes an electrical insulator having a surface and an edge, the surface having an opening therein to allow passage of a line conductor therethrough in a direction generally perpendicular to the surface. The system also includes first and second electrodes positioned about the opening on the surface of the electrical insulator and spaced apart from one another to provide a common capacitive divider signal indicative of a voltage potential of the line conductor.

Abstract: A system and method for measuring voltage of a medium to high voltage line conductor is disclosed. The system includes an electrical insulator having a surface and an edge, the surface having an opening therein to allow passage of a line conductor therethrough in a direction generally perpendicular to the surface. The system also includes first and second electrodes positioned about the opening on the surface of the electrical insulator and spaced apart from one another to provide a common capacitive divider signal indicative of a voltage potential of the line conductor.

Abstract: An electrically insulated conductor connection assembly and a method for providing the same are provided. The electrically insulated conductor connection assembly includes first and second electrical conductors each comprising a body portion and an end portion. A fastening mechanism electrically and mechanically connects the end portions of the first electrical conductor to the end portion of the second electrical conductor, and an insulator overlays and electrically insulates the fastening mechanism. The end portions of the first and second electrical conductors and the fastening mechanism form a joint, which is structured to be fastenable and unfastenable. When the joint is fastened and the insulator is overlaying the fastening mechanism, the joint is electrically insulated.

Abstract: An electrically insulated conductor connection assembly and a method for providing the same are provided. The electrically insulated conductor connection assembly includes first and second electrical conductors each comprising a body portion and an end portion. A fastening mechanism electrically and mechanically connects the end portions of the first electrical conductor to the end portion of the second electrical conductor, and an insulator overlays and electrically insulates the fastening mechanism. The end portions of the first and second electrical conductors and the fastening mechanism form a joint, which is structured to be fastenable and unfastenable. When the joint is fastened and the insulator is overlaying the fastening mechanism, the joint is electrically insulated.

Abstract: The measurement method makes use of the mobile telephones of individuals as an indicator of their presence in a geographical area. The method makes it possible to distinguish between variation in the population usually present in a geographical area and variation in the population additional thereto.

Abstract: A method monitors a vacuum interrupter for leakage or loss of vacuum. The vacuum interrupter includes a line side, a load side and separable contacts electrically connected therebetween. The line side has a line side voltage and the load side has a load side voltage. The method includes determining whether the separable contacts of the vacuum interrupter are intended to be open or closed, comparing the line side voltage to the load side voltage, and determining the leakage or the loss of vacuum when the separable contacts of the vacuum interrupter are intended to be open and when the load side voltage is within a predetermined amount of the line side voltage.

Abstract: A method monitors a vacuum interrupter for leakage or loss of vacuum. The vacuum interrupter includes a line side, a load side and separable contacts electrically connected therebetween. The line side has a line side voltage and the load side has a load side voltage. The method includes determining whether the separable contacts of the vacuum interrupter are intended to be open or closed, comparing the line side voltage to the load side voltage, and determining the leakage or the loss of vacuum when the separable contacts of the vacuum interrupter are intended to be open and when the load side voltage is within a predetermined amount of the line side voltage.

Abstract: 0 A circuit interrupter arc chute includes first and second support portions, an exit portion supported by the support portions, and a plurality of arc plates supported by the support portions. The exit portion has one or more vent openings. The arc plates have a first edge offset from the exit portion and an opposite second edge distal from the exit portion. A plurality of insulating dividing members are disposed between the arc plates. The members have a first edge proximate the exit portion and an opposite second edge distal from the exit portion. The second edge of the members extends beyond the arc plate first edges and toward the arc plate second edges. The first edge of the dividing members extends beyond the arc plate first edge and away from the arc plate second edge.

Abstract: Fuses for the potential transformers (PTs) in medium voltage switchgear are mounted in fuse assemblies which are reciprocated within the switchgear enclosure independently of the transformers they protect between a connected position in which the fuse assemblies engage stabs at the rear wall of the enclosure and a retracted position adjacent a door at the front of the enclosure through which the fuses are inserted and removed while the fuse assemblies remain within the enclosure. The fuse assemblies include insulative tubes having first releasable contacts at a distal end which engage the stabs and second releasable contacts which engage fixed contacts connected to the transformers and spaced from the rear wall. The insulative tubes are mounted on a carriage which reciprocates between the connected and retracted positions. An interlock prevents opening of the door except where the carriage is in the retracted position and blocks movement of the carriage with the door open.

Abstract: Switchgear with a closing spring release and an opening release accessible from a front face is further provided with top mounted closing and opening spring releases. In order to avoid interference with internal parts of the switchgear and to follow the movement of the trip mechanisms to which they are connected, these top mounted spring releases are flexible elongated members preferably in the form of flat stainless spring steel straps. The flat strap of the top mounted opening spring release has a slot engaging the opening trip lever and is sized so as not to engage the trip lever when the front accessible spring release is otherwise actuated. As the horizontal pivot axis of the closing spring trip lever moves transversely, the flat strap of the top mounted closing spring release is oriented to bend in the same direction while the lower end section is twisted 90.degree. to receive a coupling pin on the trip lever.