Nonlinear Material (e.g., Valve Type) Patents (Class 361/127)
  • Patent number: 10672541
    Abstract: An insulator arrangement for an overhead line includes a suspension insulator for securing an overhead line to a tower and a line arrester arrangement which is disposed electrically parallel to the suspension insulator. The line arrester arrangement has a surge arrester, which is electrically connected to ground or earth potential, and a spark gap, which is connected to the surge arrester in series and which includes a first spark electrode connected to the overhead line and a second spark electrode connected to the surge arrester. The line arrester arrangement has an assembly or mounting insulator which can be secured to the overhead line. The first spark electrode is secured to a first securing device at a first end of the assembly or mounting insulator, and the second spark electrode is secured to a second securing device at a second end of the assembly or mounting insulator.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: June 2, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Alexander Bockarev, Daniel Flohe
  • Patent number: 9666329
    Abstract: An oil-oil bushing is disclosed which can include a rotationally symmetrical, paraboloid-like, hollow bushing element of a solid insulating material, along the axial extent of which there is formed radially toward the inside a tubular bushing channel, the wall thickness of which is tapered conically toward at least one of its two ends. An electrical bushing conductor can be fitted into the bushing channel with a form fit and protrude from it on both sides. At at least one of the two axial ends of the bushing channel there is arranged a hollow-cylindrical shielding element of a conductive material, which is thick-walled at least in certain regions, which element can enclose on one side a respective end of the bushing channel, and on another side, electrically contact a connecting conductor.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: May 30, 2017
    Assignee: ABB Schweiz AG
    Inventors: Isidoro Li Pira, Ulrich Huhn
  • Patent number: 9660440
    Abstract: A device of protection against transient electrical overvoltages, including two voltage-limiting passive components, disconnectors sensitive to the state of these components and adapted to individually disconnect each end of life component therefrom, the components are joined in parallel between a first and a second terminal of the device, where the reference voltage of the first component is inferior to the reference voltage of the second component.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: May 23, 2017
    Assignee: ABB SCHWEIZ AG
    Inventors: Alain Lagnoux, Michael Duval, Stephane Brescon
  • Patent number: 9640951
    Abstract: A triggering circuit of an overvoltage protection device with an asymmetric element, specified for actuating a spark gap in symmetric or asymmetric arrangement of main electrode I, connected to input terminal I, of main electrode II, connected to input terminal II, and the auxiliary electrode, includes main electrode I of the spark gap, which is connected via a thermo-sensitive disconnector, and also via a parallel combination of varistor II and capacitor I to electrode I of the asymmetric three-pole lightning arrester, whose middle electrode is connected via the primary winding of the transformer to main electrode II of the spark gap, whose auxiliary electrode is connected via varistor I to electrode II of the asymmetric three-pole lightning arrester, which is connected via the secondary winding of the transformer to main electrode II of the spark gap, and at the same time, the thermo-sensitive disconnector is coupled via the thermal coupling with varistor II and, at the same time, the voltage at the asymmet
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: May 2, 2017
    Assignee: SALTEK S.R.O.
    Inventor: Jaromir Suchy
  • Patent number: 9396848
    Abstract: Exemplary embodiments are directed to a device with overvoltage protection that includes a varistor which can be connected by a first connection via a first line to high-voltage potential in a circuit arrangement, while a second connection is connected to ground via a second line. Furthermore, an additional impedance is provided, which can be connected between the second connection and ground or the first connection and the high voltage, or is mounted fixed in this position. The corresponding line can be interrupted by a switching arrangement. In order to test the withstand voltage of the circuit arrangement, at least one of the first and second line is interrupted and an additional impedance is inserted. A test voltage is applied to the circuit arrangement. After the overvoltage test, the interruption in at least one of the first and second lines is removed again.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: July 19, 2016
    Assignee: ABB Research Ltd
    Inventors: Dieter Fuechsle, Daniel Neeser, Bernhard Doser, Daniel Müller, Marlene Ljuslinder, Felix Greuter
  • Patent number: 9225165
    Abstract: A surge arrester has a collar for fixing tensioning elements. The collar is extendable and is capable of absorbing released energy in the event of a fault and holding together the cage containing the tensioning elements. The collar, which fixes the tensioning elements in the radial direction, is positioned around the cage of the surge arrester formed from the tensioning elements. The form of the collar is such that it has defined deformation regions, with the result that the collar can expand and thus widen in the event of a force effect in the radial direction. If the varistor elements expand in the manner of an explosion during an overload, the collar is expanded and absorbs some of the released energy. This ensures that the cage is held together in the event of an overload and thus no fragments of the varistor elements can be flung out of the cage.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: December 29, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Erhard Pippert, Dirk Springborn, Markus Sulitze
  • Patent number: 9088153
    Abstract: A gap assembly for a arrester includes a spark gap assembly and an MOV block disposed electrically in series with the spark gap assembly. The spark gap assembly includes a resistor, a capacitor disposed electrically in series with the resistor and a spark gap disposed electrically parallel to the resistor and to the capacitor.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: July 21, 2015
    Assignee: Hubbell Incorporated
    Inventors: Xingniu Huo, Dennis Wilbur Lenk, Bo Gao, Hongsheng Guo
  • Patent number: 8982526
    Abstract: A plurality of insulating rods are placed at peripheries of the nonlinear resistor and the metal plates, and each having an upper end portion and a lower end portion inserted into holes formed in the electrodes. A spacer is placed between an inner peripheral surface of the hole and an outer peripheral surface of the insulating rod inside the hole of the electrode, and a fixing screw is attached to the hole of the electrode. A double-ended bolt couples the metal plate and the electrode together. The double-ended bolt has a first screw part and a second screw part opposite in a fastening direction to the first screw part which are provided on a same axis. The first screw part is attached to the metal plate, and the second screw part is attached to the electrode.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: March 17, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomikazu Anjiki, Katsuaki Komatsu, Yoshiaki Aka, Jun Kobayashi, Takamichi Tsukui
  • Patent number: 8964346
    Abstract: An exemplary surge arrester includes a housing with protection against electric shock. A voltage-limiting active part is arranged in the housing and has a stack of varistor elements formed as a varistor column. An electrical connection is arranged outside the housing and is electrically conductively connected to the varistor column for connecting a high-voltage installation. The electrically conductive connection between the varistor column and the electrical connection is a flexible high-voltage cable conductor. The high-voltage cable has a first section arranged in the interior of the housing and formed without a shield, and a second section arranged outside the housing and having cable insulation and an electrically conductive shield that surrounds the cable conductor. The high voltage cable is electrically conductively connectable first to the housing and second to an encapsulation.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: February 24, 2015
    Assignee: ABB Technology AG
    Inventors: Bernhard Doser, Lutz Gebhardt, Peter Dubach, Nils Weiss, Denis Buergi
  • Patent number: 8922968
    Abstract: An electrical insulator including: a first connector of an electrically conducting material; a second connector of an electrically conducting material; and an electrically insulating material being arranged between the first connector and the second connector, insulating the connectors from each other; wherein a part of the first connector extends past a part of the second connector, partly enveloping part of the second connector. The invention also relates to a surge arrester arrangement, to a use of an electrical insulator for insulating a surge arrester, and to a method for production of such an electrical insulator.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: December 30, 2014
    Assignee: ABB Technology AG
    Inventors: Anders Kampe, Daniel Johansson
  • Patent number: 8896979
    Abstract: An arrester includes a stacked internal element, a pair of electrodes respectively arranged on both sides of the internal element in a stacking direction, a plurality of FRP rods arranged so as to surround the internal element each having a flat plate shape extending in the stacking direction and including protruding portions in a dumbbell shape with a width increasing from a center side to an end side in an axial direction at a constant inclination angle and then becoming a constant width thereafter, the FRP rods being fixed by the protruding portions respectively being fitted into electrode grooves respectively provided on the electrodes, and an outer cover formed of polymer material and integrally covering at least the internal element, the electrodes, and the FRP rods.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: November 25, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Saito, Akihide Ozaki, Koichi Akaso
  • Publication number: 20140285941
    Abstract: An electronic protection component comprises an outer case bounding an outer cavity therein; a varistor with a first varistor lead connected to a first varistor electrode and a second varistor lead connected to a second varistor electrode, wherein the varistor is placed in the outer cavity; a low melting point alloy wire with a first thermal fuse lead in one end and a second thermal fuse lead in the other end; wherein either the first thermal fuse lead or the second fuse lead is connected to either the first varistor electrode or the second varistor electrode therefore forming a lead junction.
    Type: Application
    Filed: June 4, 2014
    Publication date: September 25, 2014
    Inventor: Zhonghou Xu
  • Publication number: 20140268471
    Abstract: An elbow arrester with a T-body is disclosed capable of coupling with an apparatus for protection from transient over voltage, and coupling with additional cable accessories, without having to loosen the initial connection with the coupled apparatus. The elbow body of the T-body arrester has a first portion, and a second portion protruding from an intermediate section of the first portion to define a T-body. A receiving feature is located within the first portion extending towards a first end, while a male feature is coupled to a second end of the first portion, opposite from the receiving feature. A coupling fastener is integrally molded into the first portion, providing for an apparatus coupled to the coupling fastener to be decoupled without loosening the connection of another apparatus connected to the T-Body elbow. Further, decoupling the other apparatus does not loosen the apparatus coupled to the coupling fastener.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Richards Manufacturing Company
    Inventors: Glenn J. Luzzi, Jeffrey J. Madden
  • Patent number: 8810988
    Abstract: A voltage suppression device for suppressing voltage surges in an electrical circuit having a voltage sensitive assembly comprised of a plurality of tubular sections within a tubular casing.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: August 19, 2014
    Assignee: Mersen USA Newburyport-MA, LLC
    Inventors: Jerry L. Mosesian, Jean-Francois de Palma, Mark A. Radzim
  • Patent number: 8780521
    Abstract: An electronic protection component incorporates both a varistor and an alloy-type thermal fuse. In one embodiment, a melting promoting agent or flux contacts and surrounds both the varistor and the fuse in common in a shared cavity of a case. In another embodiment, the fuse and the flux are disposed in an inner case, which is disposed in contact with the varistor in an outer case. Thus, the varistor and the thermal fuse are incorporated so that the speed of heat transfer is fast, the response time is fast, and the installation for use is convenient.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: July 15, 2014
    Inventor: Zhonghou Xu
  • Patent number: 8780520
    Abstract: A surge protection element includes a contact stud and a contact element disposed at a distance from the contact stud. A connection element is configured to be transferred into a first position, in which the connection element is applied to the contact stud and to the contact element so as to electrically connect the contact stud to the contact element, and into a second position, in which the connection element is disposed at a distance from the contact stud and the contact element. In the first position, the connection element engages at least partially around at least one of the contact stud and the contact element and a thermally separable connection is provided between the connection element and the contact stud and between the connection element and the contact element.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: July 15, 2014
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Christian Depping, Ralf Lange, Viktor Horvat
  • Patent number: 8760835
    Abstract: To include a serial member, a pair of first electrodes sandwiching the serial member, a pair of second electrodes arranged on both outer sides of the first electrodes in a stacking direction, a plurality of insulating clamp members, and a wedge-shaped member tapered in the stacking direction. An annular member that presses the wedge-shaped member is provided on an axial-direction inner end surface of an outer circumferential edge of the second electrode, and the wedge-shaped member is pressed by the annular member by a leading edge portion of a bolt inserted from an axial-direction inner end surface of the annular member being tightened in the second electrode, thereby pressing an axial-direction outer surface of the insulating clamp member.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: June 24, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akihide Ozaki, Hiroki Saito, Koichi Akaso
  • Patent number: 8717732
    Abstract: A high voltage surge arrester, including a varistor element arranged so as to be connected to a high voltage source and to carry a high voltage when being positioned in its operative position, and an electric insulator that encloses and is in contact with the varistor element and forms an outer surface of the apparatus, wherein the electric insulator includes a silicone-based rubber. The silicone based rubber includes particles chosen from the group consisting of Al2O3, BN and ZnO, to such an extent that the thermal conductivity of the silicone-based rubber is equal to or above 0.8 W/mK.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: May 6, 2014
    Assignee: ABB Research Ltd.
    Inventors: Lennart Stenström, Linnea Petersson, Xavier Kornmann, Henrik Hillborg
  • Patent number: 8711538
    Abstract: An arrester for preventing an insulator supporting a power line from experiencing an electrical flashover comprises an electrode, a varistor, and a separating device. The electrode is spaced apart from the power line or a conductor that is electrically tied to the power line so as to define an external gap therebetween. The separating device, in turn, comprises two portions operative to separate from one another when the varistor experiences an electrical condition sufficient to cause the varistor to fail. The electrode, the external gap, the separating device, and the varistor are arranged in electrical series with one another and in electrical parallel with the insulator.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: April 29, 2014
    Inventors: Jonathan Jay Woodworth, Deborah Lynn Limburg
  • Patent number: 8681467
    Abstract: A surge protection apparatus is provided. The surge protection apparatus includes a non-linear element unit, a signal generation unit, and a switching element unit. The non-linear element unit enables an electrical surge to pass therethrough by rapidly decreasing resistance of the non-linear element unit when the difference in voltage between two ends of the non-linear element unit is equal to or greater than a predetermined value. The signal generation unit generates a control signal in response to current which passes through the non-linear element unit. The switching element unit switches the status thereof in response to the control signal.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: March 25, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang-Uk Chu, Up Namkoong, Kyung-Hoon Lee
  • Patent number: 8625248
    Abstract: The present invention provides an electrostatic discharge protector capable of protecting electronic circuit boards having various designs from electrostatic discharge freely, simply and easily. The electrostatic discharge protector of the present invention comprises at least three conductive members containing one pair of electrodes and the conductive members other than the electrodes, the conductive members are each disposed in such a way that the gap between one conductive member and the other conductive member has a width of 0.1 to 10 ?m, an insulating member is disposed and embedded in at least one of gaps having a width of 0.1 to 10 ?m which are adjacent to each conductive member and one electrode is connected to the other electrode paired with the one electrode through the insulating member and the conductive members other than electrodes.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: January 7, 2014
    Assignee: Showa Denko K.K.
    Inventors: Mina Onishi, Yoshimitsu Ishihara, Hirofumi Inoue, Yukihiko Azuma
  • Publication number: 20130308242
    Abstract: To include a serial member, a pair of first electrodes sandwiching the serial member, a pair of second electrodes arranged on both outer sides of the first electrodes in a stacking direction, a plurality of insulating clamp members, and a wedge-shaped member tapered in the stacking direction. An annular member that presses the wedge-shaped member is provided on an axial-direction inner end surface of an outer circumferential edge of the second electrode, and the wedge-shaped member is pressed by the annular member by a leading edge portion of a bolt inserted from an axial-direction inner end surface of the annular member being tightened in the second electrode, thereby pressing an axial-direction outer surface of the insulating clamp member.
    Type: Application
    Filed: November 7, 2012
    Publication date: November 21, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akihide OZAKI, Hiroki Saito, Koichi Akaso
  • Publication number: 20130279059
    Abstract: A plurality of insulating rods are placed at peripheries of the nonlinear resistor and the metal plates, and each having an upper end portion and a lower end portion inserted into holes formed in the electrodes. A spacer is placed between an inner peripheral surface of the hole and an outer peripheral surface of the insulating rod inside the hole of the electrode, and a fixing screw is attached to the hole of the electrode. A double-ended bolt couples the metal plate and the electrode together. The double-ended bolt has a first screw part and a second screw part opposite in a fastening direction to the first screw part which are provided on a same axis. The first screw part is attached to the metal plate, and the second screw part is attached to the electrode.
    Type: Application
    Filed: February 20, 2013
    Publication date: October 24, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomikazu ANJIKI, Katsuaki KOMATSU, Yoshiaki AKA, Jun KOBAYASHI, Takamichi TSUKUI
  • Patent number: 8531812
    Abstract: A surge arrester has a varistor element. A first and a second armature body are pressed against the varistor element by way of a bracing device. At least one of the armature bodies has a shoulder on which a cross-member of the bracing device is supported. A tensioning leg is fitted to the cross-member.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: September 10, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gundolf Barenthin, Erhard Pippert, Dirk Springborn, Markus Sulitze
  • Patent number: 8503147
    Abstract: An ESD protection device includes a ceramic multilayer substrate including a plurality of laminated insulating layers, an external electrode, at least one of an in-plane connecting conductor and an interlayer connecting conductor, and a mixture portion. The mixture portion is provided along a principal surface of one of the insulating layers and includes a dispersed material including at least one of metal and semiconductor; metal and ceramic; metal, semiconductor, and ceramic; semiconductor and ceramic; semiconductor; metal coated with an inorganic material; metal coated with an inorganic material and semiconductor; metal coated with an inorganic material and ceramic; and metal coated with an inorganic material, semiconductor, and ceramic. The mixture portion is connected to the external electrode and at least one of the in-plane connecting conductor and the interlayer connecting conductor.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: August 6, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takayuki Tsukizawa, Tetsuya Ikeda
  • Patent number: 8482896
    Abstract: An overvoltage protection element with a housing, at least one overvoltage limiting component in the housing, especially a varistor, and two connecting elements for electrically connecting the overvoltage protection element to a current or signal path in a normal state, the connecting elements being in electrically conductive contact with a respective pole of the overvoltage limiting component. In the normal state of the overvoltage protection element, at least one pole is connected to a connecting element via a plug-and-socket connection, and at least one spring is located between the housing and the overvoltage limiting component such that, when the overvoltage limiting component is thermally overloaded, it is turned by the spring separating the at least one pole from the assigned connecting element, and creating a thermally separating connection between the overvoltage limiting component and the housing when the temperature of the overvoltage limiting component exceeds a given boundary temperature.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: July 9, 2013
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Christina Grewe, Andreas Metzger
  • Patent number: 8477469
    Abstract: An overvoltage protection element having at least one overvoltage limiting component in a housing, terminal contacts for electrical connection of the overvoltage protection element to a path to be protected, an electrically conductive connecting element and with a spring system acting on the connecting element, a first terminal contact being directly connected with the first pole of the overvoltage limiting component, the connecting element being in electrically conductive contact with the second terminal contact and the second pole of the overvoltage limiting component via a thermally separating connection. With the thermal connection separated, the connecting element moves out of electrically conductive contact with the second terminal contact and the second pole of the overvoltage limiting component by the force of the spring system an insulating disconnecting element connected to the connecting element is moved between the second terminal contact and the second pole of the overvoltage limiting component.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: July 2, 2013
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Christian Depping, Michael Tegt, Joachim Wosgien, Markus Philipp
  • Publication number: 20130135783
    Abstract: Without providing mechanical processed portions on a plurality of insulating rods arranged around zinc oxide elements, tightening pieces are respectively attached on both end portions of the insulating rod by being tightened. The tightening piece is arranged while being sandwiched by an electrode and a mounting plate, and the electrode and the mounting plate are fastened by a bolt in an axial direction of the insulating rod. With this configuration, the tightening piece is solidly fixed to the electrode by an axial force of the bolt.
    Type: Application
    Filed: May 10, 2012
    Publication date: May 30, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroki SAITO, Koichi Akaso
  • Patent number: 8446703
    Abstract: The invention relates to a surge arrester having at least one varistor block 1, one end fitting 3, one reinforcing element 9 which holds the varistor block 1 firmly on the end fitting 3 with a tensile load, and at least one anchoring element 27 which holds the reinforcing element 9 firmly on the end fitting 3 with a tensile load wherein the anchoring element 27 has at least one edge 29 which cuts into the reinforcing element 9. The anchoring element 27 is preferably a cutting-ring screw union.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: May 21, 2013
    Assignee: Tridelta Uberspannungsableiter GmbH
    Inventors: Hartmut Klaube, Hubert Lauritsch
  • Patent number: 8437114
    Abstract: An ESD protection device is constructed such that its ESD characteristics are easily adjusted and stabilized and degradation of discharge characteristics caused by repetitive discharges is reliably prevented. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least a pair of discharge electrodes including exposed portions arranged to face each other and to be exposed in the cavity, external electrodes provided on a surface of the insulating substrate and connected to the discharge electrodes, and a conductive material dispersed along at least a portion of an inner circumferential surface which defines the cavity between the exposed portions of the discharge electrodes, the conductive material including an anchor portion embedded in the insulating substrate.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: May 7, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Issei Yamamoto, Jun Adachi, Akihiko Kamada
  • Patent number: 8422188
    Abstract: An ESD protection device that has low capacitance, excellent discharge characteristics, and improved heat resistance and weather resistance is provided. A functional layer 31, which is a composite having a conductive inorganic material 33 discretely dispersed in a matrix of an insulating inorganic material 32, is disposed between electrodes 21 and 22 disposed on an insulating substrate 11 and facing but spaced apart from each other.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: April 16, 2013
    Assignee: TDK Corporation
    Inventors: Yasuhiro Hirobe, Kensaku Asakura, Atsushi Hitomi, Takeshi Urano
  • Patent number: 8378778
    Abstract: An exemplary varistor is disclosed which includes at least two poles; a non-linear block; a conductive plate arranged on a main face of the block and having a protruding portion forming one of the poles; and an electrically insulating coating applied to the main face of the block. The part forming the connection pole emerges from the electrically insulating coating and has a braze surface extending above the electrically insulating coating; and the protruding part forming the connection pole is connected to the rest of the plate over at least half of the perimeter thereof.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: February 19, 2013
    Assignee: ABB France
    Inventors: Michael Duval, Alain Lagnoux
  • Patent number: 8335069
    Abstract: An overvoltage protection element with a housing, with at least one overvoltage limiting component which is located in the housing, especially a varistor, with two terminal lugs which are each connected to a respective pole of the overvoltage limiting component in an electrically conductive manner, especially soldered or welded, and with two connecting elements for electrical connection of the overvoltage protection element to the current path or signal path to be protected. In the normal state of the overvoltage protection element, the connecting elements are each in electrically conductive contact with a respective terminal lug. The overvoltage protection element can be produced especially easily and economically by the first terminal lug and the first connecting element being integrally connected to one another and by the free end of the first connecting element which faces away from the overvoltage limiting component being made as a plug-in contact.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: December 18, 2012
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Michael Tegt, Rainer Durth, Christian Depping, Joachim Wosgien
  • Patent number: 8310799
    Abstract: A transient voltage suppression device includes a dielectric layer defining a receptacle for a variable impedance material proximate a gapped electrode. Methods for manufacturing the device and for formulating a variable voltage material at lower cost and with higher manufacturing yields is also provided.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: November 13, 2012
    Assignee: Cooper Technologies Company
    Inventors: Kyle Yun-Su Kim, Hundi Panduranga Kamath, Daniel Minas Manoukian
  • Patent number: 8305184
    Abstract: Surge arrester with a module 1, 3, 9, 25, which comprises a stack of varistor blocks 1, two end armatures, between which the stack of varistor blocks 1 is held, a plurality of reinforcing elements 9, which extend between the end armatures 3 and are fixed to said end armatures, the reinforcing elements 9 surrounding the stack of varistor blocks, and at least one stabilizing disc 25, which is arranged between two varistor blocks 1 in the stack and guides the at least one reinforcing element 9, and with an outer housing 5 with screens, in which outer housing the module is at least partially accommodated. In the case of the surge arrester according to the invention, the outer housing is designed in such a way that the module is accommodated without any gas, liquid or volumes or cavities therebetween. Furthermore, each of the stabilizing discs 25 is arranged in the region of one of the screens 7.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: November 6, 2012
    Assignee: Tridelta Uberspannungsableiter GmbH
    Inventors: Hartmut Klaube, Hubert Lauritsche
  • Patent number: 8274356
    Abstract: A resistor includes a ceramic body, metal electrodes on sides of the ceramic body, each of which is connected to an electrode lead, and an insulating layer contacting a metal electrode among the metal electrodes. The insulating layer is meltable in response to heat. A conductive connector contacts the insulating layer above the metal electrode and is configured to short the metal electrodes when the insulating layer melts.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: September 25, 2012
    Assignee: EPCOS (Zhuhai FTZ) Co., Ltd.
    Inventors: Jifeng Qin, Dongjian Song, Shaoyu Sun
  • Patent number: 8243413
    Abstract: A polymer surge arrester has: internal elements including a plurality of disc-shaped nonlinear resistors disposed in a stacked manner, electrodes disposed at both ends of the nonlinear resistors, and a plurality of insulating rods coupling the electrodes; an insulating outer skin formed outside the internal elements by casting an insulating resin; and disc-shaped porous metal plates interposed between at least parts of the nonlinear resistors.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: August 14, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoshi Harada, Katsuaki Komatsu, Tomikazu Anjiki, Jun Kobayashi, Takamichi Tsukui
  • Patent number: 8206614
    Abstract: A voltage switchable dielectric material comprising a concentration of multi-component particles that are individually formed by a mechanical or mechanochemical bonding process that bonds a semiconductive or conductive-type host particle with multiple insulative, conductive, or semi-conductive guest particles.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: June 26, 2012
    Assignee: Shocking Technologies, Inc.
    Inventors: Lex Kosowsky, Robert Fleming
  • Patent number: 8199450
    Abstract: An ESD device with a protection structure utilizing radiated heat dissipation to prevent or reduce thermal failures. The device includes a voltage switchable polymer 10 between electrodes 11 and 12, which is configured to provide a heat radiating surface 40 for radiating heat when an ESD condition occurs. A radiation transmission material 19 is disposed between the heat radiating surface and the environment for radiating heat 20 when an ESD event occurs. One embodiment adds a spacer 50 for accurately spacing electrodes. A method for fabricating the device is further illustrated.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kevin P. Grundy, Joseph C. Fjelstad
  • Patent number: 8199452
    Abstract: A surge arrester is connected in an output current path from an electrical power supply system. A cut-off arrangement is also provided in the output current path and has a first electrode and a second electrode. The second electrode has a recess in which at least part of a gas generator is arranged. The recess is covered by a cover. When the cut-off arrangement responds, an additional volume for accommodation of expanded gas is provided upon demand, in addition to an arcing area provided in the interior of the cut-off arrangement.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: June 12, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernd Kruska, Kai Steinfeld
  • Publication number: 20120087055
    Abstract: An arrester for preventing an insulator supporting a power line from experiencing an electrical flashover comprises an electrode, a varistor, and a separating device. The electrode is spaced apart from the power line or a conductor that is electrically tied to the power line so as to define an external gap therebetween. The separating device, in turn, comprises two portions operative to separate from one another when the varistor experiences an electrical condition sufficient to cause the varistor to fail. The electrode, the external gap, the separating device, and the varistor are arranged in electrical series with one another and in electrical parallel with the insulator.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 12, 2012
    Inventors: Jonathan J. Woodworth, Deborah L. Limburg
  • Patent number: 8130071
    Abstract: A varistor includes a ceramic base body having a surface. The varistor also includes an insulating layer on at least a portion of the surface of the ceramic base body. The insulating layer includes a base glass and filler. The filler includes 3Al2O32SiO2.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: March 6, 2012
    Assignee: EPCOS AG
    Inventors: Thomas Jost, Andreas Schriener, Harald Reisinger, Gerd Klemen
  • Patent number: 8107206
    Abstract: A surge arrester for medium and high voltages includes a length adjustment device and pivot unit.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: January 31, 2012
    Assignee: ABB Technology Ltd.
    Inventor: Daniel Johansson
  • Publication number: 20120002339
    Abstract: An electrical assembly having an elongated electrical component, such as a surge arrester, coupled to a grading device for distributing an electric field along the electrical component during operation. The grading device includes a grading body and a means for securing the grading body to the electrical component. The grading body, the securing means, or both include semi-conductive materials. The semi-conductive materials can be nonmetallic. The grading device has improved flashover resistance over conventional metal grading devices.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 5, 2012
    Inventors: Chao Zhang, Jeffrey J. Kester, Charles W. Daley
  • Patent number: 8089745
    Abstract: An overvoltage protection element (1) includes a housing (2), two terminals (3, 4) for electrical connection of the overvoltage protection element (1) to current or signal paths to be protected, and an arrester (5, 6), including a varistor, located within the housing (2). In addition to providing a simple structure and installation, the overvoltage protection element (1) is especially well adapted to thermal and dynamic loads, so that no damage to the overvoltage protection element (1) occurs to the outside, wherein the housing (2) includes two metal shells (7, 8) electrically connected to a terminal region (9, 10) of the arrester (5, 6).
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: January 3, 2012
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventor: Joachim Wosgien
  • Patent number: 8085520
    Abstract: An electrical module assembly used in a surge arrester is manufactured by wrapping an electrical module assembly including at least one metal oxide varistor (MOV) disk to which a reinforcing structure including a pre-impregnated epoxy/glass-fiber composite has been applied with shrink film and compacting the wrapped electrical module assembly by heating the shrink film such that the shrink film shrinks and applies a radially compressive force to the electrical module assembly. The wrapped electrical module assembly then is cured at a temperature at which the shrink film no longer applies a compressive force.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: December 27, 2011
    Assignee: Cooper Technologies Company
    Inventors: Michael M. Ramarge, Alan P. Yerges, David P. Bailey, Roger S. Perkins
  • Patent number: 8077442
    Abstract: A pair of electrodes sandwiches a serial unit that includes a nonlinear voltage resistor block and a compression spring, which is coupled by a plurality of insulating rods. Each of the electrodes has a plurality of insulating-rod inserting holes and a plurality of fastening-member mounting holes each perpendicular to a corresponding insulating-rod inserting hole. Both ends of each of the insulating rods have a fastening-member through hole such that the insulating rods and the electrodes are fastened by inserting a plurality of fastening members through the fastening-member and mounting the fastening members on the fastening-member mounting holes.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: December 13, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Saito, Hiroki Kajino
  • Patent number: 8064181
    Abstract: The invention relates to a surge arrester having at least one varistor block; two end fittings; one reinforcing element which holds the varistor block under tension at the end fittings and at least one anchoring element, which holds the reinforcing element in a hole through at least one of the end fittings. The reinforcing element is preferable a wedge which splits the reinforcing element and braces with the outer walls of the through-hole. Alternatively, two or more glass-fiber-reinforced reinforcing elements are held in a through-hole, and a wedge between these reinforcing elements ensures that the reinforcing elements are held with a force fit in the end fitting in the area of the through-hole.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: November 22, 2011
    Assignee: Tridelta Uberspannungsableiter GmbH
    Inventor: Hartmut Klaube
  • Patent number: 8059379
    Abstract: A plurality of insulation supports are provided around a zinc oxide component, and the zinc oxide component and a plurality of insulation supports are integrally molded into an insulation casing. The insulation casing has corrugations on its outer surface. A thin-thickness portion is provided between the corrugations. The thin-thickness portion is provided between the insulation supports.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: November 15, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Saito, Hiroki Kajino
  • Patent number: 8045314
    Abstract: A method of converting atmospheric electrical discharge to a useable form of energy by arresting, storage and retransmission of lightning induced electrical discharge is disclosed. The invention discloses methods of deploying this technology even in isolated locations where no electricity infrastructure exists. Additionally, the potential for achieving in excess of 1 GWe of electrical power supply at costs orders of magnitude lower than fossil fuel or solar is also disclosed. Isolated collection units are disclosed. A method of deployment of these devices on individual cars and recharge stations is disclosed which in effect unplugs these automotive and recharge stations from the grid. This capability significantly decreases their dependence on the electricity grid infrastructure, enabling a much more enhanced rollout capability for the industry. The concept of Energy Dams is disclosed.
    Type: Grant
    Filed: August 1, 2009
    Date of Patent: October 25, 2011
    Assignee: The Travis Business Group, Inc.
    Inventor: Effiong Etukudo Ibok