Abstract: A housing for a vacuum interrupter module that resists fracture when fasteners received therethrough are tightened, comprises an elongated hollow body from which a mounting flange extends from at least one end. Extending between the mounting flange and the body and/or coextensive with the mounting flange is a curved transition that maintains at least one curved recess, which partially surrounds corresponding mounting bores that are configured to receive suitable fasteners to mount the housing. Once mounted, the curved transition prevents stress forces imparted by the fasteners from deflecting the mounting flange, thereby inhibiting the formation of fractures therein.

Abstract: Vacuum switching chamber is disclosed for a medium-voltage switchgear assembly having one or more ceramic cylinder tube sections which are closed both on the fixed-contact side and on the switching-contact side by metallic covers. In order in the process to achieve a situation in which a vacuum switching chamber is further improved in terms of its resistance to external pressure the disclosure proposes providing at least one of the covers, on the inside and/or outside, with an inlay which increases the resulting wall thickness, an outer cover or outer ring, which inlay, outer cover or outer ring rests at least partially cohesively in the cover or on a cover on the outside.

Abstract: Methods and system for making and using vacuum switching devices are disclosed. A vacuum switching device has an operating rod for actuating a movable electrical contact within the device. The operating rod may be a hollow epoxy glass tube with an electrical sensor disposed within it, and there may be an elastomeric polymer filling compound disposed within the tube and encasing the sensor. The operating rod may be attached to the movable electrical contact on one end by a steel end-fitting that has been press-fit into the tube and secured with at least one cross pin. In this way, a very secure electromechanical connection may be made between the operating rod and the rest of the vacuum switching device, and the sensor is protected from shock associated with the operation of the device. Moreover, the vacuum switching device is compact and easy to construct.

Abstract: A vacuum-insulated switching device contains a grounded vacuum vessel, a contact system having a fixed contact and a moving contact, electrical connecting lines coupled to the fixed contact and the moving contact, and vacuum-tight bushings supported by the grounded vacuum vessel, and provide insulation from the grounded vacuum vessel. The vacuum-tight bushings seal the electrical connected lines. An insulating transmission element is provided. A driving apparatus is coupled to the moving contact via the insulating transmission element and in a vacuum-tight manner. Further vacuum-tight bushings are provided. A further vacuum vessel is disposed in the grounded vacuum vessel. The fixed contact and the moving contact are disposed in the further vacuum vessel and pass out of the further vacuum vessel via the further vacuum-tight bushings.

Abstract: A vacuum interrupter has a housing, a first contact system, which includes a movable contact piece and a fixed contact piece, and a second contact system, which includes a grounding contact and a grounded mating contact piece. The grounding contact is disposed on a movable contact rod, which is passed out of the housing in a sealing manner, with which vacuum interrupter an interaction of the arc with the grounded mating contact is prevented. The first contact system is held in the interior of the housing using vacuum-tight separating means, which divide the interior of the vacuum interrupter into a first interior having the first contact system and a second interior having the second contact system.

Abstract: A switchgear having interrupters wherein at least two moving contacts are capable of being open and close with respect to respective fixed contacts. The switchgear comprises a non-earthed metal vacuum chamber enclosing the interrupters therein, a connection conductor for connecting the moving contacts, an operating rod connected to the connecting conductor by means of an insulator and protruding from the non-earthed metal vacuum chamber, a sealing means for sealing the protrusion of the operating rod at the non-earthed metal vacuum chamber, circuit terminals protruding from the non-earthed vacuum chamber, an earth layer surrounding an outer periphery of the insulating mold, and apotential control means. The control means for controlling the potential of the non-earthed metal vacuum chamber is connected between the circuit terminals and is connected to the non-earthed metal vacuum chamber at the intermediate point of the potential control means.

Abstract: A switching installation (5) having a circuit breaker (12), which is connected to a cable connection (33), and optionally a disconnector (14) for making or breaking a conductive connection between the cable connection (33) and a rail system (15), and an electrically insulating barrier (10). The electrically insulating barrier (10) surrounds at least the parts which are under electric voltage in operation from the circuit breaker (12) to the rail system (15), including a branch (18) leading to a rail (15) of the rail system, separately for each phase of the switching installation (5). Furthermore, inside the electrically insulating barrier (10) the switching installation may be provided with field-control means and/or voltage-sealing means (22, 25, 37).

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: Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer container is made of stainless steel plate, for example. One of the inner vacuum containers accommodates a ground switch for keeping the circuit open while the switchgear is opened, having a movable electrode connected to an operating mechanism, and a fixed electrode connected to fixed electrode rod. Another inner vacuum container accommodates a function switch capable of having at least one of functions of a circuit breaker, a disconnector and a load switch. A plurality of electrode shields each surrounds the electrodes of the ground switch and of the function switch. The ground switch and the function switch are disposed in separate vacuum inner containers, respectively.

Abstract: The present invention relates to a device for fixing a shield in a switch, said switch being housed in an enclosure comprising a cylindrical part closed by two end parts forming covers, said cylindrical part being connected at its two free ends respectively to the two end covers and comprising one or more cylindrical insulators mechanically connected to one another, at least one shield for protection of the insulators being supported by a cylindrical ring fixed between two of the above-mentioned mechanically connected parts of the enclosure, at the level of the mechanical connection between these two parts. This device is characterized in that the above-mentioned shield comprises on its external surface at least one localized material spinning point, arranged in such a way as to form at least one bearing point of the shield on the ring, so as to achieve stopping of the shield in translation in a direction parallel to the axis of the enclosure.

Abstract: The aim of the invention is to optimize, in vacuum interrupters, the connection area (12, 13, 14) between housing parts (2, 3, 4, 5), which are coaxially assigned to one another, with regard to the complexity of production for centering measures and with regard to the execution of the soldering process. To this end, a ring-like discoidal centering means (15) is used, which is made of a silver-coated copper and which comprises centering lugs (18) located on a tubular flange (17) that is arranged on the inner periphery of the centering means. Said centering lugs extend in an axial direction of the coaxial assignment and are provided in the form of tabs that point toward the ring-like discoidal area (24) of the centering means. The centering means is thereby overlapped by a tubular copper part, which is joined to the centering means and which serves as a shielding (10) inside the vacuum interrupter.

Abstract: A current interrupter assembly includes an insulating structure, a current interrupter embedded in the structure, a conductor element embedded in the structure, a current interchange embedded in the structure and connected to create a current path between the current interrupter and the conductor element, and a semiconductive layer covering at least a portion of the conductor element so as to reduce voltage discharge between the conductor element and the structure.

Abstract: A vacuum interrupter includes end covers having a curved or looped portion, which serves to connect a coil segment of the vacuum interrupter to a ceramic envelope of the vacuum interrupter, and thereby help maintain a vacuum seal for the interrupter. The curved portion acts as a spring when the vacuum interrupter is exposed to heat, thereby absorbing any expansion or contraction in the length of the vacuum interrupter due to the heating or cooling. The curved portion also protects an end of the ceramic envelope from any build-up of metallic arcing products and eliminates the need for elaborate fixturing during assembly. Additionally, a guide may be affixed to the end cover, the guide having ears which ride in a slot in a moving rod of the vacuum interrupter, to thereby prevent a twisting of a bellows of the interrupter during a brazing process. Thus, no elaborate fixturing is necessary to prevent this twisting.

Abstract: A switchgear assembly includes a vacuum interrupter assembly having an internal switching contact. A conductive current exchange is in electrical contact with the switching contact, and the current exchange defines an internal chamber within the current exchange. A plug of non-conductive, compliant material has a first portion that extends into the internal chamber in contact with the current exchange. An insulative encapsulation surrounds the vacuum interrupter assembly, the current exchange, and the plug.

Abstract: The present invention relates to a vacuum cartridge for an electrical protection apparatus such as a switch or a circuit breaker, said cartridge comprising an enclosure of substantially cylindrical shape closed by two end plates, two contacts extending axially inside the enclosure, at least one whereof, called the movable contact, is connected to an operating mechanism and is mounted sliding between a closed position of the contacts enabling the current to flow and a position wherein the contacts are separated and form an electric arc between them, and a means for producing an axial magnetic field in the arc formation zone. This cartridge comprises at least one conducting shield fitted around the periphery of at least one of the contacts, said shield being shaped and arranged in such a way as to withstand the electric field arising from the recovery voltage imposed by the power system after breaking and to thus considerably reduce the electric field at the edge of said contact.

Abstract: A circuit interrupter including a housing having an internal cavity. The internal cavity includes a space at a first end thereof, and includes an internal wall extending from the space to a second end of the housing. A vacuum interrupter is disposed in the space. The vacuum interrupter has at least one movable contact for contacting at least one stationary contact. An operating rod extends through the cavity, and is operable to move the moveable contact. At least one baffle is fixed to the operating rod, and disposed in the cavity. In a preferred embodiment, at least one step is formed in the wall. The step separates a first internal wall section from a second internal wall section, and the first internal wall section is closer to the space than the second internal wall section.

Abstract: A metal-ceramic composite is provided in which a solder layer and a ceramic member are held in contact with each other at an annular area extending along an entire circumference of an axial end surface of the ceramic member and having an average width W (mm), and in which the average width W and an outer diameter D (mm) of the ceramic member satisfy D≧30 and (⅙)×D≧W≧(D/30)+2.6.

Abstract: A metal-ceramic composite (a vacuum switch unit 50) having a metal member 13 having a tubular portion 13b, and a cylindrical ceramic member 55. The metal-ceramic composite (the vacuum switch unit 50) has a structure in which an end face of the tubular portion 13b of the metal member 13 is butt joined via a joint metal layer 15 to an end face 55a of the cylindrical ceramic member 55 in an edge sealed manner. In order to provide a metal-ceramic composite having a high joint strength which is less likely to cause defects such as cuts or cracks at the joint, the joint metal layer 15 and the ceramic member 55 contact each other at an annular region of W (mm) in average width which extends circumferentially about the end face 55a of the ceramic member 55. Furthermore, W and D have respective values which satisfy D≧30 {circle around (1)}; and (1/60)×D≦W≦(D/30)+3.1 {circle around (2)} where D (mm) is an outer diameter of the ceramic member.

Abstract: A vacuum switch comprises a first vacuum container containing therein a circuit breaker, a second vacuum container containing therein the first vacuum container and grounded, and a third vacuum container connected to the second vacuum container, containing therein a disconnecting switch and an earth device and grounded. The second and third vacuum containers are isolated in vacuum from the first vacuum container, and the second vacuum container is electrically insulated from the first vacuum container. The second vacuum container contains an insulator fixed to a conductor connected to the circuit breaker and a movable rod partially disposed out of the vacuum containers and operating the circuit breaker to open and close. The disconnecting switch, circuit breaker and the insulator are arranged in a line. A vacuum switchgear comprises the above-mentioned vacuum switches of the number corresponding to three phases and necessary components, each being contained in a metal box.

Abstract: A power station switch having high nominal current, the switch comprising a break chamber containing a dielectric gas under pressure and mounted inside a protective sheath which may optionally carry a general flow of cooling air, and a radiator/heat-exchanger situated outside said sheath and connected to said break chamber in which said gas under pressure is put into continuous circulation. Said gas under pressure as cooled in the radiator/heat-exchanger is returned to the break chamber via a metal case of the break chamber that is designed to be grounded.

Abstract: A third electrode (8A) is soldered, via a support fitting (9) onto the inner surface of a support part (1a) which projects into the intermediate part of the inner surface of an insulation tube (1A). An arc generated between the fixed-side contact (5A) and the movable-side contact (5B) when the switch is opened is led from the outer periphery of the fixed-side contact (5A) via the third electrode (8A) to the movable-side contact (5B), in a so-called two-point switch, and the dielectric breakdown probability is thus reduced, particularly at low voltages. The third electrode may have its outer periphery exposed from the insulation tube and be used as one electrode when conditioning is carried out. By the use of this structure, the present invention is capable of meeting the demands for environmental protection and insulation reliability.

Abstract: In order to provide a good gas-insulated circuit breaker which is compact and easy in assembling and preparation, a gas-insulated circuit breaker 100 is constructed with a grounded enclosure 104 enclosed a insulation nature gas, a current interruption part having a fixed contactor 115 arranged in the grounded enclosure 104 and a movable contactor 116 to be contacted with and to be separated from the fixed contactor 115, and an operating mechanism 101 to output a driving force to drive the movable contactor 116, wherein a grounded enclosure side main rotating shaft 110 connected to the movable contactor 116 through a connection member and a main output shaft 102 for outputting a rotating force to actuate the movable contactor 116 through the grounded enclosure side main rotating shaft 110 provided on the operating mechanism 101, are arranged on a coax so as to be coupled with a gear coupling 120, and the operating mechanism 101 is arranged almost under the grounded enclosure 104.

Abstract: The insulating bases are provided by pole shells for accommodation of vacuum contactors, with the pole shells each having an enclosure profile which is curved inward and, for detachable connection to the vacuum contactors, each being equipped with vacuum contactor attachment webs which are arranged as mirror images of one another. For detachable connection to the switchgear assemblies, the pole shells are each provided with a pole shell attachment web and, on the inside, have a number of circumferential transverse ribs which run approximately at right angles to the longitudinal axes of the pole shells, and the number of which is matched to the voltage conditions in the vacuum contactors. Pole shells are used for mounting vacuum contactors in switchgear assemblies for electrical power supply and distribution.

Abstract: By molding a plurality of vacuum valves (7), (13) having differing functions together with an input member (3) and an output member (21) en bloc in a resin layer (23) to form a switch gear (1), the present invention seeks to achieve dielectric strength without resorting to the use of SF6 gas, while rendering the whole device more compact and reducing both the number of parts and the man hours required for molding.

Abstract: A vacuum interrupter is provided. The vacuum interrupter includes a housing part that surrounds contact members and a vapor shield associated with the insulator, the housing part and the vapor shield are designed as one piece. A transition from the housing part to the vapor shield is undulated, so that a linear contact with one end face of the insulator results.

Abstract: An assembly and associated method are provided for use with the stationary and moveable contact sub-assembly portions of a vacuum interrupter. This assembly employs a groove machined circumferentially into an electrode of the sub-assembly in conjunction with a retaining ring apparatus having a first portion inserted into the groove. A second portion of the retaining ring provides stable structural support to components stacked onto the retaining ring apparatus. The components are clamped together and brazing material is placed across junctions between and among the individual vacuum interrupter components. Methods for constructing a vacuum interrupter sub-assembly in conjunction with brazing processes are also disclosed.

Abstract: A power switch module designed to be mounted in gas-filled containers of gas-insulated switchgear is provided, wherein each vacuum switch tube of the power switch has a corresponding rectilinearly movable actuating rod leading into the gas-filled container through a bellows-type seal. The power switch module includes two insulating support devices arranged symmetrically on a partition, between which the corresponding vacuum switch tubes supported by a pole support device and a pole head device. Such power switch modules are used in gas-insulated switchgears.

Abstract: To allow soldering of all parts of the housing including the tubular shield of a vacuum interrupter in a single operation, the metal cap (9) made of silver-plated copper enclosing the two contacts (1, 2) is provided with peripheral structuring (10, 11) on its rim (19) that is to be soldered to an end face of the hollow cylindrical insulator (12). At its flange-like rim (17), the tubular shield (16) is in contact with the same end face of the insulator (12) over spacer knobs (20) distributed around its circumference.

Abstract: An insulating support is provided for vacuum switch tubes with actuator units to be used in switchgears, in particular in gas-filled units. The insulating support has a flatbed-type extruded plastic piece with a profile fitting around the periphery of the actuator unit of the vacuum switch tubes, with the ends of the insulating support being provided with attachment arms extending in opposite directions and containing screw beds arranged symmetrically in relation to the longitudinal axis. Such insulating supports are used for accommodating and securing vacuum switch tubes equipped with actuator units for switchgears.

Abstract: A clad end seal for a vacuum interrupter comprises a disk-shaped base portion made of at least two clad metal layers and a cylindrical sidewall portion extending therefrom comprising one of the metal layers. The base portion provides strength and stiffness, while the sidewall portion provides stress isolation between the insulating tube of the vacuum interrupter and the base of the clad end seal. The metal sidewall has a relatively low yield strength and a thin section which reduces the risk of fracture when the end seal is brazed to the vacuum interrupter insulating tube. The clad end seal is produced by forming a clad sheet into a cup-shaped article, followed by removal of the outer metal layer from the cylindrical sidewall. The resultant clad end seal comprises a unitary component which eliminates the problems associated with conventional multi-component end seals.

Abstract: To be able to reliably switch high short-circuit currents in the case of a vacuum-type interrupter of small construction, first of all the annular insulator (6), which together with two cap-like metal parts (5,7) forms the housing of the vacuum-type interrupter, is disposed concentrically to the bellows (10), which, in turn, is soldered to the movable contact in the immediate vicinity of the contact member (2). Secondly, a cap-shaped protective shield (9) open toward the arc gap is disposed at the base of the movable contact member (2).

Abstract: A low cost and highly reliable vacuum circuit interrupter and a method of manufacturing the same improve production efficiency and vacuum tight sealing property of the vacuum circuit interrupter. In the vacuum circuit interrupter, within a sealed vacuum vessel 100 a pair of separable conductors in center axial direction of the sealed vacuum vessel composed of a stationary conductor 3 and a movable conductor 5 are disposed.

Abstract: An interrupter assembly comprises an interrupter switch and at least one condition sensing device embedded within a body of solid dielectric material. Preferably, the solid dielectric material is a polymer concrete or an epoxy-concrete. The condition sensing device may comprise a current sensor and/or a voltage sensor.

Abstract: A vacuum switching chamber includes a switching chamber housing having two housing parts. The two housing parts are constructed in the shape of pots or bells and each have a base which encloses an opening through which a respective supporting stalk passes. A stationary contact piece and a moving contact piece are each carried on a respective one of the stalks. The structural size of the vacuum switching chamber is reduced by inwardly drawn bases and furthermore, components and solder foils which would be used in addition to the cylindrical switching chamber housing are rendered unnecessary.