Abstract: A method for controlling a power switching apparatus to solve problems including: setting a target time reaching a predetermined position immediately before a target phase by a time calculator during an opening and closing operation of a movable arc contact with respect to a fixed arc contact in a target phase at a predetermined average switching speed; and controlling an electric motor at a speed equal to or less than an average switching speed immediately before the target phase from an operation start time to the target time by a motor controller.

Abstract: The invention relates to a single- or multi-pole switching device, in particular for DC applications, having at least one rotating switching element (2) which is connected to a drive, and also comprising switching contacts (4, 5), connection pieces (7) and connection poles or connection terminals (8) and a housing arrangement which accommodates the abovementioned parts. According to the invention, a movably guided rotary cylinder (2) is formed in the housing arrangement, said rotary cylinder being located in a body which is designed as a rotary cylinder holder (1). The rotary cylinder (2) has at least one contact pin (3) which passes radially or tangentially or eccentrically through the rotary cylinder and has, at its end, a contact piece (4) in each case. Mating contact pieces (5) are arranged in the rotary cylinder holder (1), said mating contact pieces being electrically connected to the connection pieces (7) or connection poles or connection terminals (8).

Abstract: An arc-control chamber gear for contact electrodes, the gear possessing openings in collars of an electrode centering cap so as to break the confinement of the electrodes and allow them to be ventilated by gas convection between the inside volume heated by the flow of current and the cooler outside volume.

Abstract: A gas-insulated type circuit breaker including a housing defining a gas volume for a dielectric insulation gas; a first arcing contact member and a second arcing contact member, wherein the first arcing contact member and the second arcing contact member are movable relative to each other along an axis; a first nominal contact member and a second nominal contact member, wherein the first nominal contact member and the second nominal contact member are movable relative to each other along the axis; and a first nominal contact shielding arrangement including an inner shield member and an outer shield member, wherein the inner shield member and the outer shield member are arranged coaxially about the axis. The first nominal contact member is arranged co-axially between the inner shield member and the outer shield member, and is movable relative to the inner shield member and to the outer shield member.

Abstract: A gas-insulated type circuit breaker including a housing defining a gas volume for a dielectric insulation gas; a first arcing contact member and a second arcing contact member, wherein the first arcing contact member and the second arcing contact member are movable relative to each other along an axis; a first nominal contact member and a second nominal contact member, wherein the first nominal contact member and the second nominal contact member are movable relative to each other along the axis; and a first nominal contact shielding arrangement including an inner shield member and an outer shield member, wherein the inner shield member and the outer shield member are arranged coaxially about the axis. The first nominal contact member is arranged co-axially between the inner shield member and the outer shield member, and is movable relative to the inner shield member and to the outer shield member.

Abstract: This patent document discloses high voltage switches that include one or more electrically floating conductor layers that are isolated from one another in the dielectric medium between the top and bottom switch electrodes. The presence of the one or more electrically floating conductor layers between the top and bottom switch electrodes allow the dielectric medium between the top and bottom switch electrodes to exhibit a higher breakdown voltage than the breakdown voltage when the one or more electrically floating conductor layers are not present between the top and bottom switch electrodes. This increased breakdown voltage in the presence of one or more electrically floating conductor layers in a dielectric medium enables the switch to supply a higher voltage for various high voltage circuits and electric systems.

Abstract: A high voltage switch is provided, comprising a pair of electrodes housed within a high pressure gas vessel and separated by a nominal distance D. At least one of the electrodes is provided with raised surface features each having a radius of curvature that is significantly smaller than the electrode separation D. Preferably one of the electrodes is flat-faced. Preferred gas pressures within the pressure vessel are in the range 300 psi to 1200 psi. When used to switch voltages of several hundred kilovolts, an operational life for the electrodes of between 400 and 1000 hours has been achieved.

Abstract: A gas insulated switchgear includes stationary contacts, movable contacts contactable with or uncontactable from the stationary contacts, an insulation case housing the stationary contacts and the movable contacts so as to support the same, the insulation case having a shape of a pipe, flanges disposed at an inner circumferential surface of the insulation case in a circumferential direction, each of the flanges having an annular shape, and a collection groove portion formed at the flanges and collecting metal particles generated during contact or separation operation between the stationary contactors and the movable contactors. Under this configuration, the metal particles can be collected and laid in the collection groove portion provided at the flanges, accordingly, the metal particles cannot be stuck on an insulation member or other components of the insulation case, resulting in obviating occurrence of insulation breakdown within the switchgear and improving reliability of a product.

Abstract: In a gas-insulated power apparatus in which contiguous vessels 11, 12 (GIBC1, GIBC2) are coupled by way of flanges 111, 121 of respectives thereof, and power conductors 112, 122 (GIBC5) insulated from the vessels by an insulating gas 13 are included in the vessels, by squeezing the flange 111 of the vessel on one side to be coupled by a pressing member 14 screwed to the flange 121 of the vessel on other side and the flange 121 of the vessel on other side, positions of the vessel on one side and the vessel on other side coupled as described above relative to each other can be shifted in a peripheral direction of the flange, and therefore, even when a direction of leading out a gas-insulated bus or the like becomes various depending on products, various directions can be dealt with out depending only on design of respective product specifications.

Abstract: A polyphase (e.g., three-phase) metal-enclosed, gas-insulated high-voltage circuit breaker and a switchgear including the circuit breaker is provided. For each phase, the circuit breaker includes one power arcing chamber pole per phase which are accommodated together in a common circuit breaker housing, and which have at least two connecting outputs per phase. The circuit breaker housing has a number, corresponding to the number of arcing chamber poles of chambers open at their front ends, in which the arcing chamber poles are arranged. The open front ends of the chambers are each respectively closed by means a corresponding dome-like lid covering the corresponding front ends so that a gas link between the individual chambers is provided for via the connection spaces created by the lids.

Abstract: [Object] A compact gas-insulated switching apparatus in which the space for arranging a gas breaker module may be reduced, and the space for arranging a circuit wiring may be reduced in the vertical direction is proposed.

Abstract: A high-voltage switch has a metal container filled with insulating gas, and a quenching chamber installed in the container. The quenching chamber contains a housing which is aligned along an axis, an arcing contact arrangement which is held in the housing, an exhaust volume which is bounded by the housing, and an outlet channel which is passed through the wall of the housing for exhaust gases. The outlet channel opens with a mouth section which is aligned predominantly axially into the container. The mouth section is bounded on the inside by a tubular section of the housing and on the outside by a tubular housing attachment which surrounds the housing section at a distance from it. An electrically shielded edge which is passed in an annular shape around the axis is arranged on one end face of the housing attachment on which edge a flow, which emerges from the outlet channel of the exhaust gases is detached from the housing attachment.

Abstract: In order to reduce the breaking energy of a high-voltage or medium-voltage circuit-breaker, the interrupting chamber (10) contains two contacts (12, 14) mounted to move in opposite directions, and actuated via a single device (20). The two contacts (12, 14) are surrounded by an insulating casing (18) of tubular shape, coupled in fixed manner to the main contact (12). The contacts (12, 14) are actuated by a device having a lever (24) in which each lever arm is coupled to a link, one of the links (32) being secured to the insulating casing (18) and the other link (34) being secured to the second contact (14). The guiding of the drive tube (18) on the main contacts (12b, 14b) makes it possible to improve breaking by keeping clean gas between said main contacts.

Abstract: Provided are novel azeotrope-like compositions of SF6 and N2O, as well as methods of using the same. Also provided are methods of using SF6 compositions, including azeotrope-like compositions, including a method for suppressing an electric arc or corona discharge and a method for flame suppression. Further provided are electrical devices using such SF6 compositions as a dielectric insulating gas and rigid closed-cell foams having such SF6 compositions within the cells, wherein the foam is both thermally and electrically insulative.

Abstract: The high-voltage switching device used in one installation position and has metallic encapsulation (10) a switching gap (4) and a particle trap (1) for holding foreign body particles (2), and is characterized in that in the one installation position, the particle trap (1) is arranged vertically underneath the switching gap (4), in the one installation position, an isolator part (8) is provided, which has a surface (8a) aligned essentially horizontally and faces the interior of the high-voltage switching device, with a metallic wall (9), which is higher than the particle trap (1; 1?), being arranged between the isolator part (8) and the particle trap (1; 1?). The particle trap (1) has a viewing window (3). If the high-voltage switching device is a disconnector, this viewing window (3) may be identical to the viewing window (3) for visual access to the visible disconnecting gap (4) of the disconnector.

Abstract: The gas exhaust comprises a generally cylindrical shaped casing (26) closed by a bottom (18, 22) at one end and with openings (30) to allow gas to escape. A duct (16) is arranged in the casing (26) to delimit a central passage inside the duct, and an annular passage (42) surrounding the central passage (40) outside the duct between it and the casing (26). There is a communication consisting of four holes (20) in the duct (16) close to the bottom (18) to form a communication between the central passage (40) inside the duct (16) and the annular passage (42). The casing (26) includes two diametrically opposite openings (30) located in a horizontal plane.

Abstract: In a hybrid type gas insulation switch gear apparatus, a main enclosure including a first cylindrical section have a base and a second cylindrical section branched from the base. A bushing is mounted on the cylindrical section and including a hollow insulating housing having a housing space and a central conductor extended in the hollow insulating housing. A first insulating spacer is provided in the first cylindrical section and configured to separate the first hollow space into first and second segment spaces. An insulating enclosure is also mounted to the second cylindrical section and including an enclosure space. A second insulating spacer is provided between the insulating enclosure and the second cylindrical section and configured to separate the enclosure space from the second hollow space. A disconnecting switch is formed in the first segment space of the first cylindrical section and a circuit breaker is also formed in the insulating enclosure.