EP2720244A1 - Pièce de pôle d'un agencement de disjoncteur avec un élément dissipateur de chaleur - Google Patents

Pièce de pôle d'un agencement de disjoncteur avec un élément dissipateur de chaleur Download PDF

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Publication number
EP2720244A1
EP2720244A1 EP12007041.2A EP12007041A EP2720244A1 EP 2720244 A1 EP2720244 A1 EP 2720244A1 EP 12007041 A EP12007041 A EP 12007041A EP 2720244 A1 EP2720244 A1 EP 2720244A1
Authority
EP
European Patent Office
Prior art keywords
heat sink
electrical terminal
pole part
sink element
upper electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12007041.2A
Other languages
German (de)
English (en)
Inventor
Dietmar Dr.-Ing. Gentsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Technology AG
Original Assignee
ABB Technology AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP12007041.2A priority Critical patent/EP2720244A1/fr
Publication of EP2720244A1 publication Critical patent/EP2720244A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing

Definitions

  • the invention relates to a pole part of a circuit-breaker arrangement comprising an insulation housing for accommodating a vacuum interrupter insert containing a pair of corresponding electrical switching contacts, wherein a movable lower electrical contact is connected to a lower electrical terminal of the insulation housing via an electrical conductor which is operated by a pushrod and a fixed upper electrical contact is connected to an upper electrical terminal molded in the insulation housing, on which a heat sink element is arranged for transferring the operation heat generated by the interrupter insert via the upper electrical terminal to the environment.
  • a circuit-breaker pole part is usually integrated in a medium-voltage to high-voltage circuit-breaker arrangement.
  • medium-voltage circuit-breakers are rated between 1 and 72 kV of a high current level. These specific breakers interrupt the current by creating and extinguishing the arc in a vacuum interrupter. Inside the vacuum interrupter a pair of corresponding electrical interrupter contacts is accommodated. Modern vacuum circuit-breakers attend to have a longer life expectancy than former air circuit-breakers.
  • vacuum circuit-breakers replace air circuit-breakers, the present invention is not only applicable to vacuum circuit-breakers but also for air circuit-breakers or modem SF6 circuit-breakers having a chamber filled with sulfur hexafluoride gas instead of vacuum.
  • a magnetic actuator with a high force density which moves one of the electrical contacts of a vacuum interrupter insert for purpose of electrical power interruption. Therefore, a mechanical connection between a movable armature of the magnetic actuator and an axially movable electrical contact inside the vacuum interrupter insert is provided.
  • WO 2012/007172 A1 discloses a circuit-breaker pole part comprising an external insulation housing made of a solid synthetic material for supporting and housing a vacuum interrupter insert for electrical switching a medium voltage circuit, wherein an adhesive material layer is applied at least on the lateral area of the interrupter insert.
  • the pole part comprises an upper electrical terminal and a lower electrical terminal for electrically connecting the circuit-breaker.
  • the lower electrical terminal is connected to an electrical contact which is movable between the closed and the opened position via a jackshaft.
  • This jackshaft internally couples the mechanical energy of a bistable magnet or spring driven actuator to the pole part.
  • the pole part further comprises a threaded bold on the upper electrical terminal for fastening the interrupter insert on the upper electrical terminal. At the same time, the electrical connection is provided.
  • ABB Inc. print no. 1VAL050501-TG, Rev A from March 2011
  • ABB Inc. print no. 1VAL050501-TG, Rev A from March 2011
  • ABB Inc. print no. 1VAL050501-TG, Rev A from March 2011
  • Thermal performance of the interrupter is improved as the epoxy resin draws heat away from the hot spots for a more even heat distribution.
  • a heat sink element (page 3) is mounted on the top of the pole part, which is mechanically connected to the upper electrical terminal by screwing elements.
  • the operation heat will be conducted via the upper electrical terminal through the insulation housing to the heat sink element.
  • a mounting surface of the heat sink element directly contacts a corresponding mounting surface on the top of the upper electrical terminal.
  • the bouncing time has to be limited to less than 2 ms. If the vacuum interrupter insert is accommodated inside an embedded insulation housing the whole arrangement will be stiffer than a conventionally assembled embodiment of the pole part, wherein the vacuum interrupter insert is open installed inside the insulation housing. An additional heat sink which is mounted on the top of the pole part will further increase the stiffness. Moreover, a high stiffness result in a longer bouncing time with more than 2 ms.
  • the heat sink element comprises elastically damping means which are disposed between the upper electrical terminal and the heat sink element in order to reduce the bouncing effect, namely the bouncing time, at the switching contacts of the vaccum interrupter.
  • the idea of the invention is to reduce the stiffness of the pole part by using a heat sink element with an integrated damping system between the heat sink element and the insulation housing on which the heat sink element is mounted.
  • the elastically damping means of the present invention can be realized in various ways.
  • the elastically damping means comprise a rubber element which is attached to the mounting surface of the upper electrical terminal on which the heat sink element is attached.
  • the heat sink element is attached by at least one screwing element running through the heat sink element and the rubber element and screwed in the upper electrical terminal which is usually made of a copper material.
  • the elastically damping means comprise a piston-cylinder-arrangement, wherein the cylinder is filled with a compressible medium.
  • the cylinder can be integrated in the heat sink element and the corresponding piston can be attached to the mounting surface of the upper electrical terminal.
  • the compressible medium inside the cylinder is a gas or an elastomeric material, e.g. a rubber material.
  • the heat transfer from the upper electrical terminal to the heat sink element is realized by the metallic contact of the piston to the inner wall of the corresponding cylinder.
  • the elastically damping means comprise an elastically deformation area on the heat sink element which is preferably connected to the mounting surface of the upper electrical terminal.
  • the heat transfer from the upper electrical terminal to the heat sink element is provided by the elastically deformation area which consists of the same material like the heat sink element.
  • additional heat transfer means they comprise at least one metal spiral element disposed in the heat transfer path between the upper electrical terminal and the heat sink element.
  • a metal spiral element it is also possible to use friction, spiral or multi contact lamella made of metal material or the like.
  • a metal spiral element is used for heat transferring, it preferably surrounds the rubber element for conducting the heat from the upper electrical terminal via the metal spiral element to the heat sink element.
  • the metal spiral element around the at least one screwing element which is used for attaching the heat transfer element to the upper electrical terminal.
  • the medium-voltage circuit-breaker as shown in Figure 1 principally consists of an insulation housing 1 with an embedded upper electrical terminal 2 and a lower electrical terminal 3 forming an electrical switch for a medium-voltage circuit.
  • the upper electrical terminal 2 is connected to a corresponding fixed upper electrical contact 4 which is stationary mounted at a vacuum interrupter insert 5.
  • the corresponding lower electrical contact 6 is movable mounted in relation to the vacuum interrupter insert 5.
  • the lower electrical terminal 3 is connected to the corresponding movable lower electrical contact 6 via an electrical conductor 7, or flexible band or a pistion cylinder arrangement with spiral or multicontact lamella connection.
  • the movable lower electrical contact 6 is movable between a closed and an opened switching position by a pushrod 8.
  • the electrical conductor 7 of the present embodiment consists of a flexible copper fiber material.
  • a heat sink element 9 is arranged for transferring the operation heat Q generated inside the interrupter 5 via the upper electrical terminal 2 to the environment.
  • the heat sink element 9 accommodates elastically damping means which are disposed between the upper electrical terminal 2 and the heat sink element 9. The said elastically damping means reduce the bouncing effect at the switching contacts 4 and 6 of the vacuum interrupter 5.
  • the electrically damping means according to the first embodiment of the invention comprise a rubber element 10 which is attached to a mounting surface 11 via a metal sleeve 13 by two screwing elements 12a, 12b. Both screwing elements 12a, 12b run through the heat sink element 9, the rubber element 10 and the metal sleeve 13 and they are screwed in the upper electrical terminal 2 of the pole part.
  • metal spiral elements 14a, 14b are disposed around the upper area of the corresponding screwing elements 12a and 12b. It is also possible to arrange a metal spiral element 14 around the rubber element 10 and the metal sleeve 13 for conducting the heat, emitted from the upper electrical terminal 2 via the metal spiral element 14 to the heat sink element 9.
  • FIG. 2 which shows the second embodiment of elastically damping means according to the present invention they comprise a piston 15 to cylinder 16 arrangement.
  • the cylinder 16 is filled with a compressible medium, e.g. a gas.
  • the cylinder 16 is directly molded in the material of the heat sink element 9.
  • the cylinder 16 corresponds with a piston 15 which is attached to the mounting surface 11 of the - not shown - upper electrical terminal 2 of the pole part. Additional heat transfer means are not necessary at the second embodiment.
  • the elastically damping means comprise an elastically deformation area 17, formed as a metal bellow, which is molded on the heat sink element 9.
  • the heat sink element 9 is attached to the mouting surface 11 of the upper electrical terminal 2 via the said deformation area 17.
  • the elastically deformation area 17 is formed with a special thin wall section which provides the elastically function to the heat sink element 9.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP12007041.2A 2012-10-11 2012-10-11 Pièce de pôle d'un agencement de disjoncteur avec un élément dissipateur de chaleur Withdrawn EP2720244A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12007041.2A EP2720244A1 (fr) 2012-10-11 2012-10-11 Pièce de pôle d'un agencement de disjoncteur avec un élément dissipateur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12007041.2A EP2720244A1 (fr) 2012-10-11 2012-10-11 Pièce de pôle d'un agencement de disjoncteur avec un élément dissipateur de chaleur

Publications (1)

Publication Number Publication Date
EP2720244A1 true EP2720244A1 (fr) 2014-04-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12007041.2A Withdrawn EP2720244A1 (fr) 2012-10-11 2012-10-11 Pièce de pôle d'un agencement de disjoncteur avec un élément dissipateur de chaleur

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EP (1) EP2720244A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3109880A1 (fr) 2015-06-22 2016-12-28 ABB Schweiz AG Piece polaire a moyenne ou basse tension avec au moins un element dissipateur de chaleur
US11842877B2 (en) 2021-01-27 2023-12-12 Abb Schweiz Ag Electric pole part apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529386A1 (de) * 1985-08-16 1987-02-26 Calor Emag Elektrizitaets Ag Gekapselte hochspannungsschalteinrichtung
DE19625128A1 (de) * 1996-06-12 1997-12-18 Fachhochschule Fuer Technik Un Vakuumschaltkammer
US20050092713A1 (en) * 2002-02-20 2005-05-05 Siemens Aktiengesellschaft Vacuum interrupter with a switch contact piece
JP2010272445A (ja) * 2009-05-25 2010-12-02 Japan Ae Power Systems Corp 真空遮断器
WO2012007172A1 (fr) 2010-07-15 2012-01-19 Abb Technology Ag Partie de pôle de disjoncteur et procédé de production de ladite partie de pôle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529386A1 (de) * 1985-08-16 1987-02-26 Calor Emag Elektrizitaets Ag Gekapselte hochspannungsschalteinrichtung
DE19625128A1 (de) * 1996-06-12 1997-12-18 Fachhochschule Fuer Technik Un Vakuumschaltkammer
US20050092713A1 (en) * 2002-02-20 2005-05-05 Siemens Aktiengesellschaft Vacuum interrupter with a switch contact piece
JP2010272445A (ja) * 2009-05-25 2010-12-02 Japan Ae Power Systems Corp 真空遮断器
WO2012007172A1 (fr) 2010-07-15 2012-01-19 Abb Technology Ag Partie de pôle de disjoncteur et procédé de production de ladite partie de pôle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"ADVACTN technical guide - Advanced design vacuum circuit-breakers", March 2011, ABB INC.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3109880A1 (fr) 2015-06-22 2016-12-28 ABB Schweiz AG Piece polaire a moyenne ou basse tension avec au moins un element dissipateur de chaleur
US11842877B2 (en) 2021-01-27 2023-12-12 Abb Schweiz Ag Electric pole part apparatus

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