Corona Prevention Patents (Class 174/127)
-
Patent number: 11428570Abstract: Aspects of the present disclosure describe aerial fiber optical cable localization using distributed acoustic sensing (DAS) that advantageously may determine the locality of electrical transformers affixed to utility poles along with the aerial fiber optical cable as well as any length(s) of fiber optical cable between the poles. Further aspects employ survey manned or unmanned, aerial or terrestrial survey vehicles that acoustically excite locations along the fiber optical cable and associate those DAS excitations with global positioning location (GPS).Type: GrantFiled: April 2, 2020Date of Patent: August 30, 2022Inventor: Yue Tian
-
Patent number: 10622798Abstract: The invention relates to a method for subsequently expanding the electrical transmission capacity of an overhead-line pylon system as part of an electrical high-voltage network, which comprises at least two overhead-line pylons, wherein the line cables stretched between the overhead-line pylons have a total transmission capacity and a total line cross-section, wherein the method provides for an increase in the total transmission capacity between the overhead-line pylons by recabling and/or an increase in the load-bearing capacity of the overhead-line pylons.Type: GrantFiled: March 29, 2017Date of Patent: April 14, 2020Assignee: INNOGY SEInventors: Daniel Bartminn, Friedrich Koch, Jorn Runge
-
Patent number: 10477688Abstract: A stretchable electronic assembly comprising a stretchable body, a plurality of electronic components encapsulated in the stretchable body, at least one meandering conductor connected to at least one electronic component of the plurality of electronic components, at least one hollow pocket formed in the stretchable body, the at least one meandering conductor encapsulated in the stretchable body and the at least one meandering conductor located within the at least one hollow pocket formed in the stretchable body.Type: GrantFiled: December 24, 2015Date of Patent: November 12, 2019Assignee: Intel CorporationInventors: Aleksandar Aleksov, Srinivas V. Pietambaram, Rahul N. Manepalli
-
Patent number: 10461299Abstract: Various embodiments of an electrochemical cell interconnect assembly are described. The interconnect assembly is designed to be positioned between two adjacent electrochemical cells, providing an electrical conduit therebetween. The interconnect assembly consists of an interconnect body having a curved formed and an interwoven wire structure. The interconnect assembly is designed to provide a robust electrical connection between two adjacent electrochemical cells in extreme mechanical stress and temperature environments.Type: GrantFiled: October 21, 2013Date of Patent: October 29, 2019Assignee: Electrochem Solutions, Inc.Inventors: Ernest M. McKinnon, John Hession, Renato Avelar, Bertrand Nelvy
-
Patent number: 10435152Abstract: A hybrid cable configured to tether a drone or other aerial device to a base station may include at least one conductor configured to carry a power signal and at least one optical fiber component. A jacket may be formed around the at least one conductor and the at least one optical fiber component. The jacket may have an airfoil cross-sectional shape that is symmetrical about a center line extending from a first rounded edge to a second trailing edge. As a result, the cable may orient itself towards the wind and a lift force exerted on the cable may be approximately equal along opposite lateral sides of the cable.Type: GrantFiled: May 21, 2018Date of Patent: October 8, 2019Assignee: Superior Essex International LPInventors: Thomas Christopher Cook, Robin D. Gainsford
-
Patent number: 9947426Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.Type: GrantFiled: November 15, 2010Date of Patent: April 17, 2018Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Luke T. Perkins, Christian Stoller, Peter Wraight
-
Patent number: 9833866Abstract: An output part is provided to the left end of a clamp arm that is supported by a housing so as to be slidable in the vertical direction. At the left end of the housing, a first hole for spring fitting opens obliquely upward towards the output part. A through hole that links the upper surface and the lower surface of the clamp arm is disposed obliquely upward at a left-leaning part of the clamp arm. A second hole for spring fitting and a female screw hole are formed, in that order, upwards in the through hole. A return spring that is installed through the first hole and the second hole impels the output part upwards. A push bolt that is screwed into the female screw hole rom above compresses the return spring.Type: GrantFiled: August 2, 2013Date of Patent: December 5, 2017Assignee: KOSMEK LTD.Inventor: Keitaro Yonezawa
-
Patent number: 9666334Abstract: A method is provided for applying a field grading layer to a power cable includes preparing a polymer composition having a polymer matrix, at least one conductive filler different from a non-linear conductive organic filler, and at least one crosslinking agent. The method includes extruding the polymer composition into a crosslinkable field grading tape and winding the crosslinkable field grading tape onto a section of power cable in need of field grading. The crosslinkable tape is crosslinked to obtain a field grading layer.Type: GrantFiled: June 26, 2015Date of Patent: May 30, 2017Assignee: NEXANSInventors: Staffan Josefsson, Bjorn Sonerud, Knut Magne Furuheim
-
Patent number: 9548600Abstract: A disk-shaped insulator contains a conductive block and an insulating body, wherein the conductive block is located in a central region of the disk-shaped insulator. The radial dimensions of the insulating body are adapted to those of a flange used for connecting. Multiple holes are distributed over an edge region of the disk-shaped insulator, and the edge region is covered by a conductive coating.Type: GrantFiled: June 11, 2013Date of Patent: January 17, 2017Assignee: Siemen AktiengesellschaftInventors: Sebastian Goeschel, Peter Milewski, Thilo Nehring
-
Patent number: 9431149Abstract: A device in connection with the corona effect, which is applicable in particular to connection nodes between conductor tubes of a power substation, and which includes an electrically conductive primary filamentous element wound onto itself forming an enveloping figure.Type: GrantFiled: June 21, 2012Date of Patent: August 30, 2016Assignee: SBI CONNECTORS ESPANA, S.A.Inventors: Albert Rodriguez Lopez, Josep Sanllehi Muñoz, Said Lalaouna, Joan Hernandez Guiteras, Jordi Roger Riba Ruiz
-
Publication number: 20140345907Abstract: An electrical conduction device is provided having an electrically conductive conduction element and an electrically insulating sheathing surrounding said conduction element at least in regions. An overhang corona shielding in the form of a coating composed of a material having a resistivity that increases towards an end of the sheathing is arranged on the sheathing at an outer side. An overhang corona shielding arrangement and a method for producing an overhang corona shielding are also provided.Type: ApplicationFiled: September 3, 2012Publication date: November 27, 2014Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Stefan Kempen, Steffen Lang
-
Patent number: 8669473Abstract: A dry mica tape includes a base material, a binder resin layer A formed on the base material and including an epoxy resin and an accelerator, a mica paper layer formed in contact with the binder resin layer A, and a binder resin layer B formed in contact with the mica paper layer, including an epoxy resin, and providing a cured resin with a higher glass transition point than that of a cured resin of an impregnating varnish only by reacting with an impregnating varnish including an epoxy resin impregnated into the dry mica tape wound around a conductor.Type: GrantFiled: August 9, 2011Date of Patent: March 11, 2014Assignee: Hitachi, Ltd.Inventors: Kenji Ikeda, Hisashi Morooka, Motonobu Iizuka, Yoshihiro Haraguchi, Naohiro Hiruta, Shoichi Maruyama
-
Patent number: 8525032Abstract: A device including a corona shield, and at least one support element for connecting the corona shield to a high voltage apparatus. The at least one support element includes a semiconducting polymer, which, when in operation, acts as a resistance between the corona shield and the high voltage apparatus. Furthermore the support element is arranged to fix the corona shield to the high voltage apparatus.Type: GrantFiled: November 30, 2010Date of Patent: September 3, 2013Assignee: ABB Research Ltd.Inventors: Andrew Maxwell, Thorsten Schütte
-
Patent number: 7606017Abstract: A lightning protection or internal surge device designed to suppress surges on electrical transmission or distribution lines by expending some of the excess energy in the form of corona discharge in both wet and dry conditions. The device is a very thin (of diameter not exceeding 0.1 mm) conducting wire, fiber, filament, or a bundle of such filaments, or a yarn or woven or knitted fabric made of such fibers or wires which is wound around a live conductor or ground wire forming a coil. When the coil is exposed to the fields created by the voltage surges on the line or ground wire it enhances corona losses on the line thereby damping/suppressing the surges as well as prolonging the front time of the surge to reduce its steepness.Type: GrantFiled: March 2, 2007Date of Patent: October 20, 2009Inventors: Farouk A. M. Rizk, Amr Rizk
-
Patent number: 7327213Abstract: An encapsulated fuse for power distribution systems and method for producing such fuses is provided. A fuse includes a body with opposing terminals. A corona shield is generally coaxial with the fuse and substantially extends the full length of the fuse body. The corona shield is electrically coupled at its first end with a first fuse terminal. The second end of the corona shield has a slightly larger cross-section than the first end to provide electrical isolation from the second fuse terminal. The fuse and attached corona shield are molded in an encapsulating material.Type: GrantFiled: October 5, 2004Date of Patent: February 5, 2008Assignee: G & W Electric Co.Inventors: Donald R. Martin, Mohammad Shooshtarizadeh
-
Publication number: 20070170804Abstract: A stator winding (10) of a rotating electrical machine, in particular at operating voltages of above 6 kV, is provided with preformed coils or bar windings, wherein the individual conductors of the preformed coils or bar windings are inserted into slots in the region of the stator body and are connected to one another in an end winding region outside of the stator body, and wherein the conductors (14) are surrounded by a main insulation (15) and a corona-discharge protection (16) covering said main insulation (15). For such a stator winding, operation of the machine or generator at higher temperatures or higher altitudes than originally planned is made possible without changing the geometry of the end winding by providing additional structure (17) for improving the resistance to corona discharge of the conductors (14) in the end winding region.Type: ApplicationFiled: January 19, 2007Publication date: July 26, 2007Inventor: Thomas Baumann
-
Patent number: 6960859Abstract: A Roebel bar (10) for an electrical machine comprises a plurality of essentially parallel, transposed conductor elements (11, 12, 13), which, lying over and/or next to one another, form a bar with an essentially rectangular cross section, which is surrounded on the outside by an insulation (19) and has between the insulation (19) and the conductor elements (11, 12, 13) means (14, 14?; 15, 15?; 17, 18) for forming an inner corona protection (ICP). In the case of such a Roebel bar, particularly effective inner corona protection is achieved by the fact that the means for inner corona protection comprise preformed, angled profiles (17, 18) of an electrically conducting material, which, running in the longitudinal direction of the Roebel bar (10), enclose the edges of the bar formed by the conductor elements (11, 12, 13), and to which the insulation (19) is applied.Type: GrantFiled: February 2, 2004Date of Patent: November 1, 2005Assignee: Alstom Technology LTDInventors: Thomas Baumann, Peter Klee
-
Patent number: 6927342Abstract: Electrical conductors, such as bare or round wires, are insulated by taping with a micaceous insulating tape, having a film support of a polymer which can be heat-shrunk above 150° C. and a layer of mica fastened to the film support by means of a binder, and subsequent heat shrinkage of the polymer. The micaceous tape can also have a second film support of a polymer which can be heat shrunk above 150° C.; this second film support is then fastened to the mica layer on the side opposing the first film support.Type: GrantFiled: June 23, 2000Date of Patent: August 9, 2005Assignee: Von Roll Isola Winding Systems GmbHInventors: Heinz Brandes, Thomas Hillmer, Jean-Luc Rediger, François Jund, Franz Hänggi, José Fernandez
-
Patent number: 6811875Abstract: The prevent invention provides a partial discharge-resistant wire enamel composition wherein at least one fine particle sol selected from the group of metal oxide fine particle sol and silicon oxide fine particle sol is dispersed, and 3 to 100 parts by weight of at least one fine particle selected from the group of a metal oxide fine particle and a silicon oxide fine particle is contained per 100 parts by weight of wire enamel resin. Accordingly, the partial discharge-resistant wire enamel composition having excellent dispersibility of inorganic fine particle can be obtained.Type: GrantFiled: February 16, 2001Date of Patent: November 2, 2004Assignee: Hitachi Cable, Ltd.Inventors: Hideyuki Kikuchi, Yoshiyuki Tetsu
-
Patent number: 6455782Abstract: An improved apparatus for deconcentrating an electric field, surrounding a high voltage insulator. A clamp assembly centrally formed within a coronal ring permitting positive placement of the coronal ring about an insulator end fitting. The clamping assembly includes an integral clamp with a U-shaped opening for engaging a cylindrical portion of an insulator end fitting. Two keeper clamps are pivotally mounted superjacent to the integral clamp, each keeper clamp having a smaller U-shaped opening both of which engage a portion of the insulator end fitting and pivot toward each other between an insulator receiving position and an insulator securing position, securing the insulator between the integral clamp and the two keeper clamps. A captive fastener such as a bolt extends upwardly through the clamp and the keeper clamps to secure the keeper clamps in position against the insulator end fitting and the integral clamp to secure the corona ring in position relative the insulator end fitting.Type: GrantFiled: August 17, 2000Date of Patent: September 24, 2002Assignee: Bethea Power ProductsInventors: Wei-Chung Lin, William D. Caldwell
-
Patent number: 6438250Abstract: The invention relates to a manufacturing process of an electrical conductor or circuit compensated for radio interferences, including those from the electrical circuit itself. An application of a semi-conductor material (2) of resistivity coefficient allowing the external surface of the conductor (1) to the electrical circuit to be maintained at a static electrical potential near to that of the conductor (1) and the random electrical discharge currents to be absorbed is made to eliminate the interface micro-discharge interference phenomena. Application in the field of HiFi, home automation, instrumentation.Type: GrantFiled: April 9, 1999Date of Patent: August 20, 2002Assignee: Electricite de France, Service NationalInventor: Pierre Johannet
-
Patent number: 6420812Abstract: The present invention provides a high voltage generator stator coil for power generation systems for preventing partial discharge. The high voltage generator stator coil preferably includes a plurality of metal strands that form a high voltage conductor, conductive resin-rich filler material positioned to make electrical contact with the plurality of metal strands, a conductive inner corona protector positioned to electrically contact and overlie the conductive resin-rich filler material, groundwall insulation positioned to overlie and surround the conductive inner corona protector, and a conductive outer corona protector positioned to overlie and surround the groundwall insulation. The present invention also provides a method for forming a high voltage generator stator coil. The method preferably includes abuttingly contacting a plurality of metal strands in a stacked configuration to thereby form a high voltage conductor having at least a substantially straight portion.Type: GrantFiled: September 7, 2000Date of Patent: July 16, 2002Assignee: Siemens Westinghouse Power CorporationInventor: Franklin T. Emery
-
Patent number: 6242693Abstract: An overhead power transmission line formed by stranding at least one outwardly projecting strand at the outermost layer of an overhead power transmission line formed by a plurality of strands. At least the outwardly projecting portion of the outwardly projecting strand is composed of an organic material. The outwardly projecting strand has a projection height H within a range defined as 1.5 mm≦H≦7.0 mm. By setting the projection height H of the outwardly projecting strand equal to or larger than 1.5 mm, the wind noise characteristic can be conspicuously improved. Further, by setting H≦7.0 mm, the outwardly projecting strand comprised by an organic material is made easily crushable, so the gripping portions of spacers, dampers, and other parts which have been conventionally used can be used as they are.Type: GrantFiled: September 28, 2000Date of Patent: June 5, 2001Assignee: The Furukawa Electric Co., LtdInventors: Ken Abe, Takeo Munakata, Takashi Shinohara
-
Patent number: 6242825Abstract: An the electric rotating machine which is compact and of reduced cost by improving the thermal conductivity of the main insulation in the thickness direction while maintaining the insulation breakdown voltage of the main insulation high. The initial breakdown voltage V in the thickness direction of the main insulator 30 of the stator winding 3 is higher than 20 kV/mm, and the thermal conductivity &lgr; in the thickness direction is within a range of 0.35 to 1 W/m·K, and the product V&lgr; of the initial breakdown voltage V and the thermal conductivity &lgr; satisfies a relationship of 7≦V&lgr;≦20 (MWA/m2·K). The amount of resin is within a range of 20 to 50 weight % of the main insulation material.Type: GrantFiled: November 18, 1999Date of Patent: June 5, 2001Assignee: Hitachi, Ltd.Inventors: Hideaki Mori, Shigeo Amagi, Saburo Usami, Tadashi Sonobe, Yasuomi Yagi, Tomoya Tsunoda, Mitsuru Onoda
-
Patent number: 6194665Abstract: A plastic film distinguished in corona resistant characteristic having a low cost without a low mechanical strength, which plastic film is particularly suitable for making insulated wires, coils, and electric motors capable of fully responding to demands for providing electric trains with higher running speeds and higher acceleration and deceleration. In accordance with one embodiment, the film includes a base layer and at least one thermally conductive layer having a minimum thermal conductivity of 2 W/m·K, preferably 6 W/m·K, more preferably 15 W/m·K laminated horizontally on at least one surface of the base layer. In accordance with another embodiment, the film has a minimum volume electrical resistivity of 1014 &OHgr;·cm, preferably 1015 &OHgr;·cm, and includes a base layer and at least one low-electrical-resistance layer having a maximum superficial electrical resistance of 1013 &OHgr;·cm, preferably 1012 &OHgr;·CM.Type: GrantFiled: October 25, 1996Date of Patent: February 27, 2001Assignee: Kanegafuchi Kagaku Kogyo KabushikiInventors: Eiichirou Kuribayashi, Keigo Nishida, Yoshihide Ohnari
-
Patent number: 6140588Abstract: An arrangement with a conductor (15) intended to be on a high potential and a part (12) connected to ground and separated therefrom by at least a voltage receiving air gap (16, 17), comprising an insulating envelope (18) surrounding said conductor and at least a first member (9) of electrical insulating material arranged to screen off said ground part from said conductor. Said air gap is dimensioned to get such a high electrical field strength by possible sudden, strong voltage raises of said conductor, that air molecules in said air gap will be ionized. Said insulating envelope (18) and the insulating member (9) have surfaces arranged to receive electrical charges generated through said ionizing for creating a voltage over their thicknesses and decreasing the voltage drop in the air gap between the conductor (15) and the ground part (12).Type: GrantFiled: July 18, 1997Date of Patent: October 31, 2000Assignee: Asea Brown Boveri ABInventors: Stefan Valdemarsson, Anders Bjorklund, Mats Leijon, Tommy Holmgren, Dan Windmar, Urban Astrom
-
Patent number: 6130495Abstract: A supporting element or core stack for an electric winding, in particular for a stator of a turbogenerator, includes a supporting surface to which an electric conductor can be attached. The supporting surface is provided with a coating for corona shielding. A turbogenerator has the supporting element. A method of producing a corona shield for an electric winding disposed on a supporting element, includes providing the supporting element with a coating for corona shielding.Type: GrantFiled: November 16, 1998Date of Patent: October 10, 2000Assignee: Siemens AktiengesellschaftInventors: Michael Schulten, Ingo Thiemann
-
Patent number: 6075303Abstract: In a high-voltage insulated stator winding having at least one stator winding bar (10) for an electrical machine, which stator winding bar (10) is surrounded by winding insulation (13) which comprises a plurality of insulating layers (22) arranged one above the other, in which case each insulating layer (22) is composed of an insulating material arranged on a base (16), in particular in the form of Mica paper (14), improved dielectric utilization (withstand voltage) and improved thermal utilization (heat dissipation) are achieved to an equivalent extent in that a heat-resistant plastic film is used as the base (16), which plastic film is modified by introducing a filler which can resist corona discharges.Type: GrantFiled: May 13, 1999Date of Patent: June 13, 2000Assignee: Asea Brown Boveri AGInventor: Roland Schuler
-
Patent number: 6060162Abstract: A pulsed voltage surge resistant magnet wire comprising a conductor, a continuous and concentric and flexible uniform coat of base insulation material superimposed on the conductor. An essentially continuous and concentric and uniform pulsed voltage surge shield overlaying the coat of base insulation material. The shield has therein an effective amount of a particulate material. The shield is superimposed on the coat of base insulation material, and has a continuous and concentric and flexible and uniform top coat of insulation material superimposed thereon.Type: GrantFiled: June 8, 1995Date of Patent: May 9, 2000Assignee: Phelps Dodge Industries, Inc.Inventors: Weijun Yin, Donald J. Barta
-
Patent number: 5989702Abstract: A sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as polyimide which contains particles of an inorganic corona resistant material, said polymeric material being bonded to mica paper consisting of mica, wherein said mica paper may be impregnated with polymeric resin containing particles of inorganic corona resistant material. The resultant insulation may be used as a tape or wrapper.Type: GrantFiled: August 7, 1996Date of Patent: November 23, 1999Assignee: General Electric Canada Inc.Inventors: Robert Edward Draper, G. Paul Jones, Robert H. Rehder, Michael Stutt
-
Patent number: 5969456Abstract: An electromagnetic equipment such as dynamoelectric machine includes an electromagnetic coil formed by winding an insulated wire. The insulated wire is made of a bare conductor having, on its surface, two layers of an insulating coating composed of a varnish and a low-resistance conductive coating composed of a heat resisting varnish containing a conductive oxide. A coil formed of the insulated wire is applied to the whole electromagnetic coil or a coil part near a power supply terminal.Type: GrantFiled: July 15, 1997Date of Patent: October 19, 1999Assignee: Kabushiki Kaisha ToshibaInventors: Tetsushi Okamoto, Yoshihiro Ito
-
Patent number: 5928567Abstract: A solvent-free liquid conductive material designed to protect electrical components, such as printed circuit boards from high pulse static electricity. The solvent-free liquid conductive material comprises a liquid silicone polymer, powdered metallic compound, non-conductive inorganic powder and a curing agent. The conductive material is applicable to both additively and subtractively processed printed circuit boards.Type: GrantFiled: March 11, 1997Date of Patent: July 27, 1999Assignee: The Whitaker CorporationInventors: Thomas Harald Flottman, Francis Joseph Nuzzi, David Bernard James
-
Patent number: 5925944Abstract: A tapered electrode with a rounded tab portion and a grading electrode is disclosed for minimizing the concentration of current flow to localized areas of the electrode. The tapered electrode comprises a base portion and a tab portion with a rounded end. The grading electrode comprises areas of varying width and relative resistance which operate to grade current flow away from the terminal portion of the tapered electrode tab.Type: GrantFiled: November 24, 1997Date of Patent: July 20, 1999Assignee: Siemens Westinghouse Power CorporationInventors: Franklin T. Emery, Jeffrey Neal Lankford
-
Patent number: 5902633Abstract: Process for the reduction of breakdown risks with respect to the solid dielectric insulant of transmission cables and lines operating under high voltages. The insulant normally separates the conductors of a multi-conductor line or the central conductor and the outer metal envelope of a coaxial line. Small amounts of metal particles with dimensions below 1 micron are added to the dielectric insulant mass.Type: GrantFiled: May 21, 1997Date of Patent: May 11, 1999Assignee: Commissariat a l'Energie AtomiqueInventors: Claude Le Gressus, Claude Faure, Pierre Bach, Guy Blaise
-
Patent number: 5808238Abstract: A multiple-cable power transmission line system is provided which includes a plurality of overhead transmission lines each having a ridge on the outer periphery thereof. When the outer periphery-to-crest height of the ridge of an overhead transmission line which is located closer to the earth ground is LE and the outer periphery-to-crest height of the ridges of the other overhead transmission lines is L.sub.OT, the relation L.sub.E <L.sub.OT is fulfilled.Type: GrantFiled: November 20, 1996Date of Patent: September 15, 1998Assignee: The Furukawa Electric Co., Ltd.Inventors: Takeo Munakata, Jun Katoh, Takashi Shinohara
-
Patent number: 5760516Abstract: The stator winding of an electrical machine comprises conductor elements which are spaced apart from one another, are electrically insulated from one another and are surrounded over their entire length by common main insulation. The cavities, which are caused by the arrangement on both bar narrow sides of the conductor elements and the main insulation, are filled with an electrically semiconductive compound which, for its part, is covered by an electrically semiconductive strip. In order to provide a smooth bar surface, the electrically semiconductive strip is composed of a fiber-reinforced plastic, which has incisions on alternate sides of the narrow sides of the conductor bar oriented transversely with respect to the bar's longitudinal direction; these incisions are deeper than half the strip width and have a cut width which is on the order of magnitude of the strip thickness.Type: GrantFiled: November 18, 1996Date of Patent: June 2, 1998Assignee: Asea Brown Boveri AGInventors: Thomas Baumann, Jorg Oesterheld
-
Patent number: 5675127Abstract: An anticorrosive structure for leads of packaged circuit modules wherein each of the leads covered with an anticorrosive coat has a tapered end so that one edge of the tapered end projects beyond another edge of the tapered end, the one edge and the another edge are connected with a single flat inclined surface and the single flat inclined surface is entirely covered with the anticorrosive coating.Type: GrantFiled: June 2, 1995Date of Patent: October 7, 1997Assignee: Toyo Communication Equipment Co., Ltd.Inventor: Masatoshi Kawanabe
-
Patent number: 5468916Abstract: To fix the conductors and coils of wind overhangs and to fill cavities in the winding overhangs of electrical machines, strings are used which include compressible rovings (1) made up of fibers and surrounded by an elastic sheath (2) which is permeable to impregnating resin. A spacing is introduced into the winding overhangs with a thickness which is greater than the spacings to be filled. The strings are impregnated after they are pulled in. To improve the overhang corona shielding, the strings are treated with a conductive impregnating agent which is permeable to the impregnating resin before they are pulled in.Type: GrantFiled: April 30, 1993Date of Patent: November 21, 1995Assignee: Asea Brown Boveri Ltd.Inventors: Michael Litenas, Roland Schuler
-
Patent number: 5023399Abstract: A support assembly for non-metallic cable incorporating a metallic support fitting and a preformed metallic stress limiter, the latter including a generally mushroom-shaped hollow body having a tubular stem portion inserted between one end of the support fitting and the cable, and a generally part-toroidal head portion having an outer profile which is smoothly curving.Type: GrantFiled: July 16, 1990Date of Patent: June 11, 1991Assignee: Telephone Cables LimitedInventors: Brian P. Mills, Edward K. George
-
Patent number: 4966635Abstract: The invention relates to a compound cable, such as an aluminum cable, an aluminum alloy cable, aluminum cable steel reinforced or an aluminum alloy cable steel reinforced with reduced audible noise for use in a high voltage transmission line.The surface of each of the aluminum wires to constitute the outermost layer of the cable is treated in water or aqueous vapor of more than 90.degree. C. so as to form a hydrophilic hydrated film on said surface, or more than 3 grooves are provided on the outer periphery of each of the aluminum wires in excess of 30% of such wires to constitute the outermost layer of the cable, a hydrated film being caused to form on the surface including the grooves thereof, so that the raindrops adhering to the surface may readily disappear due to the improved hydrophilic property and draining property of the surface of the cable thereby preventing the development of the corona discharge.Type: GrantFiled: July 27, 1988Date of Patent: October 30, 1990Assignee: Sumitomo Electric Industries, Ltd.Inventor: Kenichi Sato
-
Patent number: 4836504Abstract: Disclosed is a rail-type fence using electricity which includes a plurality of support posts between which are extended continuous electrical wires. The electrical wire is enclosed within and supports a conductive tubular rail. The wire is held against the inner wall of the tubular rail by end plugs and splices. An alternate embodiment of the rail-type fence includes a plurality of electrified wires positioned within the outer surface of the walls of a nonconductive tubular rail. In this embodiment, a conductive end plug transfers electricity from the electrical wire within the tubular rail to the electrified wires embedded in the rail's walls.Type: GrantFiled: December 22, 1986Date of Patent: June 6, 1989Assignee: Amco PartnershipInventors: Conrad F. Fingerson, Robert D. Eickhoff
-
Patent number: 4759805Abstract: The surface of an aluminum conductor is roughened, for example, by blasting. A hydrophilic film such as a boehmite film, an anodic oxide film and a chemical conversion film is formed on the roughened surface. A protective film made of a wetting agent or a hydrophilic resin is formed on the hydrophilic film. The conductor may comprise a compressed aluminum conductor.Type: GrantFiled: December 16, 1986Date of Patent: July 26, 1988Assignee: Fujikura Cable Works Ltd.Inventors: Kohichi Saruwatari, Takeshi Saito, Akira Okazato, Kozo Kounosu, Tadashi Inoue, Takanori Hita, Masatsugu Maejima
-
Patent number: 4760296Abstract: Resinous compositions used as electric insulation have unique corona-resistance increased from 10- to 100-fold or more by the addition of organoaluminate, organosilicate or fine alumina or silica of critical particle size, and dynamoelectric machines and transformers incorporating coils made of wire strands coated with these novel compositions consequently have substantially increased service lives.Type: GrantFiled: July 25, 1984Date of Patent: July 26, 1988Assignee: General Electric CompanyInventors: Don R. Johnston, Mark Markovitz
-
Patent number: 4726991Abstract: A material provides protection against electrical overstress transients having rise times as rapid as a few nanoseconds or less. The material comprises a matrix formed of a mixture of separate particles of conductive materials and separate particles of semiconductor materials coated with insulating material to provide chains of the particles within the matrix with interparticle separation distances along the chains less than several hundred angstroms, thereby to permit quantum-mechanical tunneling of electrons between the separate particles in response to high energy electrical transients.Type: GrantFiled: July 10, 1986Date of Patent: February 23, 1988Assignee: EOS Technologies Inc.Inventors: Hugh M. Hyatt, Karen P. Shrier
-
Patent number: 4605819Abstract: A conductor for high voltage of electricity, comprising a plurality of circular conductor wires which are wound helically to form a circular cable and a protrusion wire which is helically wound with the conductor wires as part of the cable in the outer periphery of the cable, so as to protrude beyond the outer periphery of the cable.Type: GrantFiled: October 1, 1984Date of Patent: August 12, 1986Inventor: Frank W. Warburton
-
Patent number: 4506110Abstract: A corona tube is provided wherein the tube is flexible so that it can fit on any three dimensional container rim. The tube can be a flexible steel tube which is a standard commercial variety of corrugated steel tube which is usually used to contain wires or the like. The tube has a slotted edge along its length, is cut to a length to the periphery of the rim and bent in the shape of the rim. The slot of the flexible tube is placed over the edge of the rim and thereafter the tube can be welded to the rim.Type: GrantFiled: January 9, 1984Date of Patent: March 19, 1985Assignee: Brown Boveri Electric Inc.Inventors: Keith I. Gray, Henry G. Meier
-
Patent number: 4473765Abstract: A grading layer for a slot armor in an electric machine employs a layer of semi-conducting particles of silicon carbide bonded to the face of insulation of the slot armor. A layer of a tough high temperature paper such as an aramid paper separates the silicon carbide from the windings. The voltage gradient at the radially outerward extremity of the windings is capacitively coupled through the aramid paper to the silicon carbide layer wherein span-wise conduction decreases the peak voltage gradient to reduce the likelihood of the formation of corona and flashover.Type: GrantFiled: September 30, 1982Date of Patent: September 25, 1984Assignee: General Electric CompanyInventors: Thomas R. Butman, Jr., Alexander L. Lynn, Kevork A. Torossian
-
Patent number: 4471160Abstract: An improved electrical terminal designed to eliminate arcing and corona effects has a substantially spherical post with one or more circumferential slots perpendicular to the longitudinal axis of the terminal. In one embodiment, each slot is adapted to receive a wire of predetermined gage in a close-fitting wrapped configuration. The outer diameter of the wire does not extend beyond the circumference of the sphere. The number and size of the slots depends on the number and gage of the wire(s) to be connected. More than one wire can be connected in a single slot, either by wrapping the wires concentrically or in parallel planes within the same slot. Solder is applied to the wrapped wires to form a secure, smooth and rounded connection.Type: GrantFiled: April 19, 1982Date of Patent: September 11, 1984Inventor: James L. Arthur
-
Patent number: 4463219Abstract: The invention relates to a compound cable, such as an aluminum cable, an aluminum alloy cable, aluminum cable steel reinforced or an aluminum alloy cable steel reinforced with reduced audible noise for use in a high voltage transmission line.The surface of each of the aluminum wires to constitute the outermost layer of the cable is treated in water or aqueous vapor of more than 90.degree. C. so as to form a hydrophilic hydrated film on said surface, or more than 3 grooves are provided on the outer periphery of each of the aluminum wires in excess of 30% of such wires to constitute the outermost layer of the cable, a hydrated film being caused to form on the surface including the grooves thereof, so that the raindrops adhering to the surface may readily disappear due to the improved hydrophilic property and draining property of the surface of the cable thereby preventing the development of the corona discharge.Type: GrantFiled: May 15, 1981Date of Patent: July 31, 1984Assignee: Sumitomo Electric Industries, Ltd.Inventor: Kenichi Sato
-
Patent number: 4458107Abstract: According to the method, a strip of nonconductive, fibrous material having a capillary effect with respect to water is fixed in close contact with each conductor of the transmission line. The capillary effect of the fibrous material ensures the formation of thin filaments of water on the surface of the conductor when the same is wet. These filaments of water promote the generation of a corona effect in the form of permanent discharges resulting in a luminescent phenomena and inhibit the occurrence of pulsatory discharges. A conductor for aerial, high voltage, electric power transmission line which allows the above method to be carried out, is also disclosed.Type: GrantFiled: December 3, 1981Date of Patent: July 3, 1984Assignee: Hydro QuebecInventor: Paul Heroux