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EP2073234A1 - Vakuumschalter - Google Patents

Vakuumschalter Download PDF

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Publication number
EP2073234A1
EP2073234A1 EP07024705A EP07024705A EP2073234A1 EP 2073234 A1 EP2073234 A1 EP 2073234A1 EP 07024705 A EP07024705 A EP 07024705A EP 07024705 A EP07024705 A EP 07024705A EP 2073234 A1 EP2073234 A1 EP 2073234A1
Authority
EP
European Patent Office
Prior art keywords
bellow
vacuuminterrupter
rips
aforesaid
long axis
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Withdrawn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
EP07024705A
Other languages
English (en)
French (fr)
Inventor
Michael Dr. Conry
Thierry Dr. Delachaux
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 EP07024705A priority Critical patent/EP2073234A1/de
Publication of EP2073234A1 publication Critical patent/EP2073234A1/de
Withdrawn legal-status Critical Current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
    • H01H33/66238—Specific bellows details

Definitions

  • the invention relates to a vacuuminterrupter with at least one movable contact piece which is connected with a vacuumchamber by a bellow.
  • Circuit breakers are used in electrical networks to make and break currents; i.e. short circuit currents as well as load currents under different load impedances. In the medium voltage range (rated voltages up to 72 kV), current interruption in vacuum is the dominant technology.
  • the working principle to interrupt currents is by separating the two contacts conducting these currents.
  • One of the contacts is generally fixed, while the other moves vertically.
  • a bellow is needed. It connects the non moving lid to the moving contact.
  • the design of the bellow is made to insure a vertical linear motion of the contact only.
  • a rotatable contact is already known from EP 1 760 743 . It is an object of this invention to create a very progressive realisation of this in a circuit-breaker with vacuumchamber.
  • a vaccuminterrupter in this invention has a special bellow, characterized in that the radial rips of the bellow are arranged in an angle that differs from the perpendicular orientation of the long axis.
  • a first embodiment of the invention is supported by that the orientation of the rips of the bellow are mechanically induced by winding or rotating the bellow around its long axis for at least a part of a full 360° angle.
  • the bellow will be deformed at least partly reversibly, in order to store mechanical potential energy, which will be set free, when the bellow will be stretched or enlongated by opening the contact.
  • a rotational movement will be superimposed to the linear movement of the movable contact piece. That means, this bellow begins as a normal bellow, then it is forced to twist during manufacturing until it buckles. Once it buckles, it can be twisted further with relatively little additional effort, because torsional stiffness has dropped). This is, what is meant by "torsion admitting”. It requires much less effort to twist it than it would take to twist a standard linear bellow that had not been pre-buckled.
  • a further alternative embodiment of the invention is supported by that the orientation of the rips of the bellow are implemented srewlike around its long axis.
  • the bellow itself cause a rotational movement between the two flanges of the bellow, if it is compressed or elongated. So the rotational component of the movement will be caused easily by compressing or elongating the bellow during switching operation.
  • the amount of the winding angle is implemented by a kind of screwing back in a winded rotation position when closing the contacts (the contact pieces) and the so implemented potential energy is set free simultaneously by the opening movement of the contacts, so that the linear opening movement is superimposed with a rotational movement.
  • the disclosed invention here is a new design of a bellow, that allows a linear motion superimposed with a rotational motion.
  • This rotational motion is naturally produced by the helical structure of the bellow and does not need any external acting force for the torsion. It means that a vacuum interrupter equipped with this new bellow will be able to operate by a standard linear mechanical drive system, which only needs to be able to accommodate the rotation.
  • the bellow is "torsion generating" and the drive is "torsion admitting”.
  • a further embodiment is, that a part of a bellow, or one of the bellows of a serial bellow arrangement of several bellows is constructed with the aforesaid features.
  • a further embodiment is that the bellow or the bellows is made, e.g. are made of metal.
  • a further embodiment is that the bellow rips have a round egde contour in the cross-section.
  • a further embodiment is that the bellow rips have a sharp edge contour in the cross section.
  • the aim with the srew-like or the winded bellow as well is to have produced a geometry of the bellow, that generates automatically a rotational movement when a linear movement is imposed.
  • the bellow 1 itself begins manufacture as a normal linear bellow. Then it is subjected to a torsion that permanently buckles the bellow. At this point, the stiffness of the bellow to torsional deformation is drastically reduced, and so it can be relatively easily deformed by the drive to produce a twist of the moving contact.
  • the bellow retains its flexibility in the linear direction. Its application as an interface between air and vacuum for vacuum interrupters is new.
  • the radial rips 2 of the bellow 1 or at least a part of these rips of the bellow are arranged in an angle that differs from the perpendicular orientation of the long axis x. It means that in each case the rips, or the radius of the rips are inclined out of their perpendicular orientation of the long axis x in comparison to a normal symmetric bellow form the state of the art. This is the focus of the functional consequences in this invention.
  • Figur 3 shows in principle a switch for example for media voltage, in which is used a vacuumchamber 20 with at least one linear movable contact 22.
  • the contact 21 is not movable.
  • the new srew-like or pre-winded/-twisted bellow 1 as generates automatically a rotational movement force when a linear movement is imposed to the movable contact. So the bellow 1 will move in one rotational direction when the contact is opened, and it will be twisted back automatically when the contact ist moved again back in closing position.
  • the rotational movement additionally to the linear movement generates an extraordinarily effective arc exstinguishing.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP07024705A 2007-12-20 2007-12-20 Vakuumschalter Withdrawn EP2073234A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07024705A EP2073234A1 (de) 2007-12-20 2007-12-20 Vakuumschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07024705A EP2073234A1 (de) 2007-12-20 2007-12-20 Vakuumschalter

Publications (1)

Publication Number Publication Date
EP2073234A1 true EP2073234A1 (de) 2009-06-24

Family

ID=39364050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07024705A Withdrawn EP2073234A1 (de) 2007-12-20 2007-12-20 Vakuumschalter

Country Status (1)

Country Link
EP (1) EP2073234A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113541032A (zh) * 2020-04-14 2021-10-22 伊顿智能动力有限公司 用于间歇和部分旋转和平移轴的密封结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5004877A (en) * 1988-10-03 1991-04-02 Square D Company Vacuum interrupter
DE19721611A1 (de) * 1997-05-23 1998-11-26 Abb Patent Gmbh Vakuumkammer
EP0905731A2 (de) * 1997-09-30 1999-03-31 Hitachi, Ltd. Faltenbalg und dieser benutzender Vacuumschalter
US20040164052A1 (en) * 2003-02-21 2004-08-26 Stoving Paul N. Self-fixturing system for a vacuum interrupter
EP1760743A1 (de) 2005-09-02 2007-03-07 ABB Research Ltd Vakuumleistungsschalter mit drehbar montierter bewegliche Kontakt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5004877A (en) * 1988-10-03 1991-04-02 Square D Company Vacuum interrupter
DE19721611A1 (de) * 1997-05-23 1998-11-26 Abb Patent Gmbh Vakuumkammer
EP0905731A2 (de) * 1997-09-30 1999-03-31 Hitachi, Ltd. Faltenbalg und dieser benutzender Vacuumschalter
US20040164052A1 (en) * 2003-02-21 2004-08-26 Stoving Paul N. Self-fixturing system for a vacuum interrupter
EP1760743A1 (de) 2005-09-02 2007-03-07 ABB Research Ltd Vakuumleistungsschalter mit drehbar montierter bewegliche Kontakt

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113541032A (zh) * 2020-04-14 2021-10-22 伊顿智能动力有限公司 用于间歇和部分旋转和平移轴的密封结构
US11622461B2 (en) * 2020-04-14 2023-04-04 Eaton Intelligent Power Limited Sealing for an intermittent and partial rotating and translating shaft
CN113541032B (zh) * 2020-04-14 2024-11-05 伊顿智能动力有限公司 用于间歇和部分旋转和平移轴的密封结构

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