Abstract: A lamp having a fin provided in a periphery of a metal base. The fin includes a first surface close to a bright spot of a light-emitting tube and a second surface far from the bright spot on an opposite side of the first surface. A distance between a first inner edge of the first surface and a bright spot plane as a plane orthogonal to a center axis of the metal base including the bright spot is shorter than a distance between the bright spot plane and a first outer edge of the first surface. A distance between the first inner edge and the first outer edge of the first surface is not shorter than a distance between a second inner edge and a second outer edge of the second surface.

Abstract: A rotary electric machine unit includes: a rotary electric machine; and a case that accommodates the rotary electric machine. The rotary electric machine includes: a stator core; a multi-phase coil that is attached to the stator core; a conductive member holder that collectively holds a conductive member connected to a coil end of the multi-phase coil and is disposed outside the coil end in a radial direction; and a terminal block that is fixed to a fastening surface of the case and electrically connects a terminal portion of a power distribution member with a terminal portion of the conductive member. The terminal block is disposed outside the conductive member holder in the radial direction, and at least a part of the terminal block overlaps the conductive member holder in the radial direction.

Abstract: Superconducting computing system housed in a liquid hydrogen environment and related aspects are described. An example superconducting computing system includes a housing, arranged inside a liquid hydrogen environment, where a lower pressure is maintained inside the housing than a pressure outside the housing. The superconducting computing system further includes a substrate, arranged inside the housing, having a surface, where a plurality of components attached to the surface is configured to provide at least one of a computing or a storage functionality, and the substrate further comprises a plurality of circuit traces for interconnecting at least a subset of the plurality of the components. The housing is configured such that each of the plurality of components is configured to operate at a first temperature, where the first temperature is below 4.2 Kelvin, despite the liquid hydrogen environment having a second temperature greater than 4.2 Kelvin.

Abstract: Sealing arrangement for guiding an electrical connection through a wall of a housing for a device for driving a compressor having an electrically conducting connecting element, guided through a conical passage aperture of the housing, which at least regionally is fully enclosed over the entire circumference by a sealing element. Sealing element is formed as a hollow truncated cone and disposed between a conical sealing facing of the connecting element and a boundary surface of the passage aperture sealing the connecting element against the housing. The connecting element is disposed having been guided through a connection passage of a receiving member for receiving a plug housing with a wall into the plug housing. A device for driving a compressor of a gaseous fluid with the sealing arrangement and a method for assembling the device and use of the device are disclosed.

Abstract: An improved, gaseous electrolysis apparatus can include a cooled header for electric connections or couplings, an exemplary co-disposed, coaxial heat exchanger around the reaction chamber to extract heat from the reaction chamber and exemplary rugged gas source and collection manifold(s) to support fixed and/or mobile applications in an embodiment. The system can include a heated anode and co-disposed cylindrical cathode within the reaction chamber and an improved electronic control circuit in an embodiment.

Abstract: Disclosed is a capacitor bushing and a method of manufacturing the same. The capacitor bushing includes insulating layers (20), formed by winding insulating fibers (22) around the outer side of a central conductor (10), and conductive layers (30) between the insulating layers (20). The wefts (34) and warps (36) that constitute the conductive fibers (32) are manufactured by sequentially forming a first coating layer (38) and a second coating layer (38?) on the surface of a core wire (37). The wefts (24 and 34) and the warps (26 and 36) of the insulating fibers (22) and the conductive fibers (32) extend obliquely with respect to the longitudinal direction of the central conductor (10). The wefts (24 and 34) and the warps (26 and 36) form a polygonal or circular shape. The present invention has a merit in that bubbles are prevented from being generated in the filling layers (40).

Abstract: A responsive cryogenic power distribution system for maintaining cryogenic refrigeration throughout a superconducting network. The responsive cryogenic power distribution system includes a plurality of cryogenic cable arrangements and cryogenic cooling stations, arranged to form a single master closed loop arrangement and a plurality of sub closed loop arrangements, enclosed within the single master closed loop arrangement. The system also includes sensors and controllers that allow for reconfiguration in the event of a loss of one or more cryogenic cooling stations and/or one or more cryogenic cable arrangements.

Abstract: A liquid containment device is provided for a liquid filled transformer having a tank and a bushing attached to a surface of the tank, the bushing including a terminal having a terminal head including a terminal head opening and a porcelain bushing. A terminal head attachment is attached to the terminal head of the bushing. A housing is provided having an open end, a closed end and a contact pole opening formed on the closed end, the housing encapsulating the bushing and the terminal head attachment. A contact pole is attached to the terminal head attachment and extends through the contact pole opening of the housing. A contact is attached to the contact pole and a housing fastener is fastened on the contact pole to press the housing onto the surface of the tank.

Abstract: The invention relates to an electrical feed-through unit for penetration of electrical contacts through the wall of a housing of an electric motor. It has a pin made of an electrically conducting material, which is surrounded by an electrically insulating material. The pin possesses an at least partially wedge-shaped contact surface for the area of a penetration through the wall of the housing and is able to be arranged with the sheath surrounding it in an at least partially wedge-shaped borehole penetrating through the wall of the housing. In addition, the invention relates to a housing of an electric motor, which contains at least one such electrical feed-through unit as well as an electric motor which has such a housing.

Abstract: A method for deploying a pump system in a wellbore includes coupling the pump system to one end of a tubing encapsulated cable. The cable is extended into a wellbore drilled through a subsurface fluid producing formation. The tubing encapsulated cable has an outer tube extending substantially continuously from the end thereof connected to the pump system to a surface end of the cable. The outer tube is made from material selected to exclude fluid in the wellbore from an interior of the outer tube. The cable includes at least one electrical conductor disposed inside the outer tube, wherein a rated load current of the at least one electrical conductor is selected such that substantially continuous electrical current drawn by the electrical load device exceeds the rated current of the at least one electrical conductor.

Abstract: An assembly for use with an oil-filled cable termination includes a cable gland, a cable received in the cable gland, a stress cone received around the cable and spaced apart from the cable gland, and a seal system around the cable between the cable gland and the stress cone. The seal system includes: a first oil seal layer surrounding an upper portion of the cable gland and a portion of the cable between the cable gland and the stress cone, with the first oil seal layer being spaced apart from the stress cone; a second oil seal layer surrounding the first oil seal layer and extending between the cable gland and the stress cone; and a third oil seal layer surrounding the second oil seal layer and extending between the cable gland and the stress cone.

Abstract: An apparatus is provided. The apparatus includes a plasma generation element physically coupled to a first main electrode. The plasma generation element includes at least a first open end and a second open end. Each open end defines a nozzle such that the first open end directs an ablative plasma to a second main electrode and the second open end directs the ablative plasma to a third main electrode.

Abstract: A stator bar clip adapter for a liquid cooled dynamoelectric device having a stator bar bottle clip coupled to a first stator bar and a stator bar leaf clip coupled to a second, same series-loop stator bar, and a related dynamoelectric device are disclosed. The stator bar clip adapter includes a bottle clip engaging member configured to engage a stator bar bottle clip; and a leaf clip engaging member coupled to the bottle clip engaging member and configured to engage a stator bar leaf clip.

Abstract: A sampling adapter having a tubular body with a first open end and a second open end encloses an adapter volume that is accessible by a sensor probe through a septum in cap covering the first open end. The second open end is configured to be reversibly attachable to an opening in a storage container.

Abstract: A cable termination comprising an upper cryostat chamber containing a liquid cryogen and a lower cryostat chamber containing a gaseous cryogen to maintain dielectric integrity and thermal management of an electric connection. A gaseous cryogen recirculation system may cause the gaseous cryogen to flow through the lower cryostat chamber and a power cable enclosure.

Abstract: The electrical connection of a sealed electrical machine is provided and includes a casing containing lead conductors each connected to a bushing via an electrical connector. The casing has at least an inlet and an outlet for a cooling fluid. The electrical connector includes at least a permeable element defining a chamber such that during operation the cooling fluid, passing through the chamber and the permeable element, cools the permeable element. A method is also provided for cooling an electrical connection.

Abstract: The method of the invention makes it possible to cool electrical switchgear operating at medium voltage and high current, such as a circuit breaker. The method consists in inserting serially two heat pipes (11) inside said switchgear, putting a first end (11A) of the first heat pipe (11) in the hot portion of the hot portions (10A, 10C) of the circuit breaker (10) and a second end (11B) of the first heat pipe (11) in a portion that is cooler (10A) of the hot portions (10A, 10C). The other heat pipe (11) is put between the cooler of the hot portions (10A) and a cooler part of the circuit breaker (10). A particular application is provided for medium-voltage, high-current circuit breakers.

Abstract: A high voltage bushing including an electrical conductor configured to be electrically connected to a high voltage device and configured to be connected to an external fluid cooling system, and an insulating body surrounding the electrical conductor. A method includes cooling the high voltage bushing by connecting the electrical conductor to an external fluid cooling system.

Abstract: A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the superconducting element. The variable-impedance shunt(s) is configured to present a first impedance during a superconducting state of the superconducting element and a second impedance during a normal resistive state of the superconducting element. The superconducting element transitions from the superconducting state to the normal resistive state responsive to the fault current, and responsive thereto, the variable-impedance shunt(s) transitions from the first to the second impedance.

Abstract: The present invention provides an electrical feed-through (200) for making a durable and reliable electrical connection through a wall (227) of a vacuum chamber (225). The electrical feed-through (200) comprises a tubular member having an open end (217) and a closed end (219). At least one conductor (201) extends through the closed end (217) and is fixed thereto by a vacuum sealing joint (214). The joint (214) is arranged so that it is not in line-of-sight from the open end (217). In this way impinging elements (220) and direct heat radiation (221) is prevented from directly reaching the joint (214), thereby extending the time it takes for contamination of the joint (214) to cause problems.

Abstract: An improved power transfer mechanism is disclosed, which is particularly beneficial in power transmission applications. The mechanism allows the SCFCL system to have more than one electrical reference. The use of hydraulic power simplifies the design of systems in which one part of the system is referenced to ground, while a second part of the system is referenced to a different voltage, typically much higher than ground. For example, the tank of the SCFCL system may not be connected to ground, while hydraulic power supply is referenced to ground. This embodiment is performed without the use of an electrically conductive path between the two parts of the system.

Abstract: According to one embodiment, in a high-voltage bushing of a rotating electric machine, the communicating holes are inclined at least toward a circumferential direction of the hollow conductor or toward a machine external side from a direction vertical to a wall surface of the hollow conductor.

Abstract: A high voltage system including a HVDC valve, a liquid fluid cooling system for cooling the valve, and a high voltage bushing for transferring high voltage and high current from the fluid cooled HVDC valve. The high voltage bushing includes an insulating body surrounding an electrical conductor electrically connectable to a connector of the HVDC valve. The electrical conductor of the high voltage bushing includes a cooling duct arranged for cooling the bushing utilizing a circulating gaseous fluid. A heat exchanger is connected to the cooling duct and adapted to cool the circulating gaseous fluid, wherein the heat exchanger is connected to the cooling system of the HVDC valve and adapted to receive cooling water from and to return heated cooling water to the cooling system of the HVDC valve.

Abstract: Electric fault current limiter has superconducting elements inside a cryogenic vessel and bushings for connecting an external circuit. The electric fault current limiter (1) includes a cryogenic vessel (2) and superconducting assemblies (5) including high temperature type superconducting elements (HTSC) immersed in a liquid coolant (6) such as liquefied nitrogen. Bushings (25, 28) with conductors (17, 18) are associated with a main body (3) of the vessel (2) such that the conductors (17, 18) extend horizontally from a surrounding space into an ullage space (8) situated between a level (7) of the liquid coolant (6) inside the vessel (2) and a cover (4). The arrangement of the bushings (25, 28) according to the invention allows for removing the cover (4) without dismantling electrical connections between the current limiter (1) and a circuit to be protected as is necessary with prior art limiters.

Abstract: A high voltage bushing including an elongated electric conductor, a tubular insulator surrounding the conductor, and cooling mechanism for cooling the conductor. The cooling mechanism includes at least one cooling element extending along a fraction of the length of the conductor and in thermal connection with the conductor.

Abstract: The electrical connection of a sealed electrical machine is provided and includes a casing containing lead conductors each connected to a bushing via an electrical connector. The casing has at least an inlet and an outlet for a cooling fluid. The electrical connector includes at least a permeable element defining a chamber such that during operation the cooling fluid, passing through the chamber and the permeable element, cools the permeable element. A method is also provided for cooling an electrical connection.

Abstract: A high voltage bushing including an elongated electric conductor, a tubular insulator surrounding the conductor, and cooling mechanism for cooling the conductor. The cooling mechanism includes at least one cooling element extending along a fraction of the length of the conductor and in thermal connection with the conductor.

Abstract: The present invention provides an electrical feed-through (200) for making a durable and reliable electrical connection through a wall (227) of a vacuum chamber (225). The electrical feed-through (200) comprises a tubular member having an open end (217) and a closed end (219). At least one conductor (201) extends through the closed end (217) and is fixed thereto by a vacuum sealing joint (214). The joint (214) is arranged so that it is not in line-of-sight from the open end (217). In this way impinging elements (220) and direct heat radiation (221) is prevented from directly reaching the joint (214), thereby extending the time it takes for contamination of the joint (214) to cause problems.

Abstract: A high voltage system including a HVDC valve, a liquid fluid cooling system for cooling the valve, and a high voltage bushing for transferring high voltage and high current from the fluid cooled HVDC valve. The high voltage bushing includes an insulating body surrounding an electrical conductor electrically connectable to a connector of the HVDC valve. The electrical conductor of the high voltage bushing includes a cooling duct arranged for cooling the bushing utilizing a circulating gaseous fluid. A heat exchanger is connected to the cooling duct and adapted to cool the circulating gaseous fluid, wherein the heat exchanger is connected to the cooling system of the HVDC valve and adapted to receive cooling water from and to return heated cooling water to the cooling system of the HVDC valve.

Abstract: A terminal structure of a superconducting cable is provided that is capable of preventing degradation in airtightness of a seal provided on the boundary between a room-temperature side and a cryogenic side for a long-term use. The terminal structure includes a terminal of a superconducting cable, a bushing providing electrical conduction with a superconducting conductor of the cable, and a refrigerant bath housing the terminal and the bushing. The refrigerant bath includes a liquid nitrogen layer in its cryogenic side and a nitrogen gas layer in its room-temperature side that are adjacent to each other. In the nitrogen gas layer, distance t between an inner surface of the refrigerant bath and an outer periphery of the bushing is dimensioned such that nitrogen gas is kept in a gaseous state without being pressurized by a pressurizer and respective pressures of nitrogen gas and liquid nitrogen counterbalance each other.

Abstract: The invention relates to an electrical connection structure for a superconductor element cooled by a cryogenic fluid and connected to an electrical bushing, which bushing passes successively through an enclosure at an intermediate temperature between ambient temperature and the temperature of the cryogenic fluid, and an enclosure at ambient temperature, said bushing projecting outside the ambient temperature enclosure. According to the invention, said intermediate enclosure is filled at least in part with a solid material of low thermal conductivity, such as a polyurethane foam or a cellular glass foam. The invention is applicable to connecting a superconductor cable at cryogenic temperature to a device for equipment at ambient temperature.

Abstract: A high voltage bushing for transferring AC or DC high voltage and current. The bushing includes an electrically connectable electrical conductor, an insulator housing enclosing the conductor, and a space filled with an electrically insulating gas in between said insulator housing and said conductor. The electrical conductor is coated with a surface layer of a material having a thermal emissivity substantially larger than a thermal emissivity of the conductor.

Abstract: A high voltage bushing including an electrical conductor configured to be electrically connected to a high voltage device and configured to be connected to an external fluid cooling system, and an insulating body surrounding the electrical conductor. A method includes cooling the high voltage bushing by connecting the electrical conductor to an external fluid cooling system.

Abstract: In a bushing which has a terminal with a bend for connecting a conduit tube and a lead tube, the effect to cool the inner corner of the bend is enhanced. The bushing includes a conductive conduit tube, a conductive lead tube, and a terminal. The terminal has a bend and connects the conduit tube and the lead tube. Electric current and cooling gas flows in these tubes. A cooling means is provided for forced cooling of the inner corner of the bend of the terminal. One example of the cooling means is a guide vane which makes cooling gas flowing in the bushing come closer to the inner corner of the bend. A larger current can flow even when the bushing has the same size as a conventional one.

Abstract: A heat dissipation device includes a heat dissipation body and a heat conducting body thermally combined with the heat dissipation device. The heat dissipation body includes a central portion defining a through hole therein and a plurality of fin extending from a periphery of the central portion. Each of the fins branches a plurality of portions at an end thereof. The heat conducting body includes a column thermally fitted in the through hole of the central portion of the heat dissipation body. A cavity is defined between the column and the central portion of the heat dissipation body. The cavity contains a phase-changeable medium therein, which becomes vapor once the column absorbs heat from a heat-generating electronic device.

Abstract: A terminal structure of cryogenic equipment for leading a terminal of cryogenic equipment 100 from a very low temperature portion to a room temperature portion through a bushing, having a feature in that a connecting/heat-insulating portion 300 adiabatically connected with the aforementioned very low temperature portion 200 and the aforementioned room temperature portion 400 is provided along the outer circumference of the aforementioned bushing 30 between the aforementioned very low temperature portion 200 and the aforementioned room temperature portion 400.

Abstract: A variable gap thermal interface is coupled with a cold or hot plate, forming a low thermal resistance connection between an electronic device module containing at least one heat generating electronic device and a rack or other structure. The variable gap thermal interface and the cold or hot plate are provided in a configuration to allow quick-disconnect of the electronic device module from the rack, allowing for a wide dimensional tolerance between the module and the rack while maintaining a reliable thermal connection. An embodiment including a plurality of server modules within a server rack in conformance with the present invention, allows the replacement of server modules while powered without any disconnection or reconnection of hoses to cold plates used in cooling the server modules, thus greatly reducing the probability of leaks and resulting damage to the system.