EP0410049B1 - Arrangement de contacts d'un interrupteur à vide - Google Patents

Arrangement de contacts d'un interrupteur à vide Download PDF

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Publication number
EP0410049B1
EP0410049B1 EP89250009A EP89250009A EP0410049B1 EP 0410049 B1 EP0410049 B1 EP 0410049B1 EP 89250009 A EP89250009 A EP 89250009A EP 89250009 A EP89250009 A EP 89250009A EP 0410049 B1 EP0410049 B1 EP 0410049B1
Authority
EP
European Patent Office
Prior art keywords
contact
support
arrangement according
diameter
contact carrier
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.)
Expired - Lifetime
Application number
EP89250009A
Other languages
German (de)
English (en)
Other versions
EP0410049A1 (fr
Inventor
Günter Bialkowski
Dieter Gerlach
Roman Dr. Rer. Nat. Renz
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DE8915750U priority Critical patent/DE8915750U1/de
Priority to EP89250009A priority patent/EP0410049B1/fr
Priority to DE58908842T priority patent/DE58908842D1/de
Priority to US07/556,012 priority patent/US5064976A/en
Priority to JP2194684A priority patent/JPH0364816A/ja
Publication of EP0410049A1 publication Critical patent/EP0410049A1/fr
Application granted granted Critical
Publication of EP0410049B1 publication Critical patent/EP0410049B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6642—Contacts; Arc-extinguishing means, e.g. arcing rings having cup-shaped contacts, the cylindrical wall of which being provided with inclined slits to form a coil

Definitions

  • the invention is in the field of vacuum interrupters and is to be used in the structural design of a contact arrangement which consists of two axially opposed contacts, each contact being cup-shaped and provided with a support body for the contact plate.
  • a known contact arrangement for a vacuum interrupter consists of two contacts arranged in the same axis and movable in their axial direction relative to one another, the contact carriers of which are provided with a power supply bolt and are cup-shaped and are provided with inclined slots for generating an axial magnetic field (axial field contacts);
  • a contact plate made of a contact material based on chrome-copper is soldered onto the edge of each contact carrier wall.
  • a substantially columnar support made of poorly conductive material for example of non-magnetic material such as chrome-nickel steel, is provided. This support is arranged centrally and has approximately the shape of a double T-beam in cross section (DE-A-32 31 593).
  • the column-like support which is also essentially column-like, is extended like a screen only at the end facing the contact plate (DE-A-33 34 493) or it has a relatively slim support core and is provided with plate-like support parts at the ends of this support core ( EP-A-0 155 376).
  • contact arrangements of this type when the contact is closed, there is a current concentration in the area of the supports, which occurs when a nominal short time occurs currents greater than 50 kA can lead to welding of the contacts.
  • Such welding can also occur when the support is designed as a hollow cylinder which is arranged within the cross-sectional area of the power supply bolt, leaving a central cross-sectional area on a pitch circle corresponding to the mean wall diameter of the hollow cylinder (DE-A-32 27 482).
  • a relatively large shunt across the support which hinders the formation of an effective axial magnetic field.
  • the invention has for its object to provide such a contact arrangement so that with a small shunt on the support welding of the contact plates is excluded with certainty.
  • the invention provides that the diameter of the power supply bolt is at least 50% of the outer diameter of the contact carrier, that the diameter of the pitch circle for the support is also at least 50% of the outer diameter of the contact carrier and is at most equal to the outer diameter of the power supply bolt, and that the support in the central region of its length has a substantially smaller cross section than in the foot and head region, so that the ohmic resistance of the support is at least about an order of magnitude greater than the ohmic resistance of the contact carrier and contact plate.
  • the frictional connection caused by the support is distributed over such a large surface area of the contact plates that, on the one hand, the contact area that is created is certainly larger than the critical contact area at which welding of the two contact areas is to be expected, and that on the other hand, the shunt over the support is sufficiently small.
  • the enlarged cross section of the support in the foot and head area ensure that the support, which has the smallest possible wall thickness in consideration of the required ohmic resistance, does not press into the bottom of the contact carrier and into the contact plate under the influence of the axial mechanical forces.
  • the support can consist, for example, of a thin-walled tube which is provided with ring-like support surfaces at both ends. These support surfaces can also be flange-like approaches. -
  • the associated pitch circle on which this pipe is to be arranged then corresponds in terms of its diameter to the mean wall diameter of the pipe.
  • the support consists of a plurality of support elements arranged on a pitch circle, which form parallel electrical current paths.
  • This formation of parallel current paths can take place in that tubular or pin-shaped support elements are used as the support, which are arranged on the pitch circle in a number of at least three pieces evenly distributed.
  • a support element is expediently assigned to a sector-shaped section of the contact plate.
  • the electrical resistance of the support elements can be adapted to the required value by appropriate shaping of their cross section.
  • a support in the form of a tubular support body the wall of which is provided with several, preferably at least ten, at most about twenty radial openings.
  • the wall areas between the openings then form the individual current paths.
  • the diameter of the preferably circular openings is expediently about 50% of the length of the tubular support body. This will a sufficient mechanical stability of the support with a sufficiently greater ohmic resistance is guaranteed.
  • the respective support is constructed so that it has a resistance of at least about 40 to 50 ⁇ Ohm, suitably of about 100 ⁇ Ohm.
  • the support elements In order to compensate for the electrodynamic axial forces generated in the contacts when there is a high current flow, it is also advisable to fix the support elements at both ends. This is expediently carried out by means of hard soldering, namely by connecting the support elements to the contact plate on the face side and by connecting the support elements to the contact carrier on the face or jacket side.
  • the jacket-side connection enables the desired tolerance compensation within a suitable fit.
  • the jacket-side connection can take place in the region of a centering pin which engages in a bore in the contact carrier.
  • the design of the support provided according to the invention is particularly suitable for those axial field contacts in which the outer diameter of the contact carrier is 60 to 150 mm and in which the contact plate consists of a contact material based on chromium-copper.
  • Figures 1 and 2 show an axial field contact 1, which consists of the power supply pin 2, the cup-shaped contact carrier 3 with the inclined slots 4 and the likewise slotted contact plate 5.
  • the diameter d of the current supply bolt 2 is approximately 60% of the outer diameter D of the contact carrier 3.
  • Pin-like support elements 6 are arranged between the contact carrier and the contact plate. These are located on a pitch circle d T , the diameter of which is only slightly smaller than the outside diameter of the power supply bolt 2.
  • six such support elements are provided, one support element being arranged between the slots of the contact plate 5.
  • a further support element can additionally be arranged in the center of the contact 1. In this case, only an annular central cross-sectional area is left free.
  • each support element has a support shaft 61 and is provided with capital-like support surfaces 62 at the ends, that is to say in the foot and head region. The area of these support surfaces is approximately 6 times the cross section of the support shaft.
  • a centering projection 63 is also provided, which - according to FIG. 1 - engages in a corresponding bore in the contact carrier 3.
  • the number of support elements 6 is advantageously between three and twelve.
  • the support elements 6 are soldered in a manner not shown on the end face to the contact plate 5 and in the region of the centering projection 63 on the jacket side to the contact carrier 3.
  • a tubular support body according to FIGS. 4 and 5 can also be used.
  • This consists of the actual support tube 71 with an upper support ring 72 and a lower support ring 73.
  • the actual support tube 71 the wall thickness of which is chosen to be as small as possible, taking into account the required mechanical load-bearing capacity, with circular openings 74 provided. According to FIG. 4, fifteen such openings are provided, evenly distributed over the circumference. The diameter of these openings is slightly less than half the total height or total length of the tubular support body 7.
  • the support surface of the two support rings 72 and 73 is approximately 5 times as large as the cross-sectional area of the actual support tube 71.
  • the average wall diameter of the actual support tube 71 corresponds to the mentioned pitch circle diameter d T.
  • a contact arrangement according to FIG. 1 has an ohmic resistance of approximately 4 ⁇ Ohm with an outer diameter of the contact carrier of approximately 100 mm.
  • FIG. 6 shows an axial field contact 10, in which a thin-walled tube 11 with annular support surfaces 12 and 13 arranged at both ends is provided as a support between the contact plate 5 and the contact carrier 3.
  • the upper support surface extends outward like a flange
  • the lower support surface extends outward like a flange.
  • the wall of the tube can be provided with openings, similar to the support body according to FIG. 4. - With this support, the lower support surface can also form a continuous floor, such a support being producible as a drawn part.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Claims (9)

  1. Dispositif de contact pour un tube interrupteur à vide, constitué par deux contacts de champ axial, qui sont situés axialement en vis-à-vis et sont déplaçables l'un par rapport à l'autre dans leur direction axiale, présentant les caractéristiques suivantes :
    - chaque contact de champ axial est constitué par un porte-contact (3) en forme de pot et une plaque de contact (5) montée sur le bord de la paroi du porte-contact,
    - chaque porte-contact est équipé d'une broche cylindrique (2) d'amenée du courant,
    - la paroi de chaque porte-contact est pourvue de fentes (4) inclinées par rapport à l'axe du contact et formant configurations incurvées,
    - un support (6;7;11) formé d'un matériau mauvais conducteur de l'électricité et disposé entre le porte-contact et la plaque de contact de chaque contact de champ axial,
    - le support est situé, tout en laissant dégagée une zone centrale en coupe transversale, sur un cercle partiel à l'intérieur de la surface en coupe transversale de la broche d'amenée de courant (2),
    caractérisé par le fait
    que le diamètre (d) de la broche d'amenée de courant (2) est égal à au moins 50 % du diamètre extérieur (D) du porte-contact (3),
    que le diamètre (dT) du cercle partiel pour le support (6,7) est égal aussi à au moins 50 % du diamètre extérieur (D) du porte-contact (3) et est égal au maximum au diamètre (d) de la broche d'amenée de courant (2), et
    que le support possède, dans la partie médiane de son extension longitudinale, une section transversale nettement plus petite que dans sa partie formant pied que dans sa partie de tête (62, 72, 73),
    de sorte que la résistance ohmique du support est supérieure, au moins environ d'un ordre de grandeur, à la résistance ohmique du porte-contact (3) et de la plaque de contact (5).
  2. Dispositif de contact suivant la revendication 1, caractérisé par le fait que le support est constitué par un tube à paroi mince (11) possédant des surfaces de support annulaires (12,13), situées aux deux extrémités.
  3. Dispositif de contact suivant la revendication 1, caractérisé par le fait que le support est constitué par plusieurs éléments de support (6,8) disposés sur le cercle partiel et qui forment des voies de courant électrique parallèles.
  4. Dispositif de contact suivant la revendication 3, caractérisé par le fait que les éléments de support (6) sont réalisés sous la forme de tiges ou de tubes et sont présents en un nombre égal au moins à trois.
  5. Dispositif de contact suivant la revendication 3, caractérisé par le fait que les éléments de support (8) forment un corps d'appui de forme tubulaire (7), dont la paroi comporte plusieurs passages radiaux (74).
  6. Dispositif de contact suivant la revendication 5, caractérisé par le fait que les passages (74) sont réalisés avec une forme circulaire.
  7. Dispositif de contact suivant la revendication 6, caractérisé par le fait que le diamètre des passages (74) et égal approximativement à 50 % de la longueur du corps de support tubulaire (7).
  8. Dispositif de contact suivant l'une des revendications 1 à 7, caractérisé par le fait que le support (6,8) est fixé par brasage aussi bien au porte-contact (3) qu'à la plaque de contact (5).
  9. Dispositif de contact suivant la revendication 8, caractérisé par le fait que la résistance ohmique du support (6,7) est égale approximativement à 100 µohms.
EP89250009A 1989-07-28 1989-07-28 Arrangement de contacts d'un interrupteur à vide Expired - Lifetime EP0410049B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8915750U DE8915750U1 (fr) 1989-07-28 1989-07-28
EP89250009A EP0410049B1 (fr) 1989-07-28 1989-07-28 Arrangement de contacts d'un interrupteur à vide
DE58908842T DE58908842D1 (de) 1989-07-28 1989-07-28 Kontaktanordnung für eine Vakuumschaltröhre.
US07/556,012 US5064976A (en) 1989-07-28 1990-07-20 Contact configuration for a vacuum interrupter
JP2194684A JPH0364816A (ja) 1989-07-28 1990-07-23 真空バルブ用接触装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89250009A EP0410049B1 (fr) 1989-07-28 1989-07-28 Arrangement de contacts d'un interrupteur à vide

Publications (2)

Publication Number Publication Date
EP0410049A1 EP0410049A1 (fr) 1991-01-30
EP0410049B1 true EP0410049B1 (fr) 1994-12-28

Family

ID=8202544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89250009A Expired - Lifetime EP0410049B1 (fr) 1989-07-28 1989-07-28 Arrangement de contacts d'un interrupteur à vide

Country Status (4)

Country Link
US (1) US5064976A (fr)
EP (1) EP0410049B1 (fr)
JP (1) JPH0364816A (fr)
DE (2) DE8915750U1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214550A1 (de) * 1992-04-29 1993-11-04 Siemens Ag Vakuumschaltroehre
DE4329518A1 (de) * 1993-08-28 1994-01-05 Slamecka Ernst Vakuumschalter-Kontaktanordnung
TW265452B (fr) * 1994-04-11 1995-12-11 Hitachi Seisakusyo Kk
US6639169B2 (en) * 2001-09-12 2003-10-28 Kabushiki Kaisha Meidensha Contact for vacuum interrupter and vacuum interrupter using the contact
JP3840934B2 (ja) 2001-09-12 2006-11-01 株式会社明電舎 真空インタラプタ用接触子及び真空インタラプタ
EP2884517A1 (fr) * 2013-12-11 2015-06-17 ABB Technology AG Contact AMF pour interrupteur à vide avec élément de renforcement
DE102015217647A1 (de) * 2015-09-15 2017-03-16 Siemens Aktiengesellschaft Schaltkontakt einer Vakuumschaltröhre mit Stützkörpern
US10643808B2 (en) * 2018-10-09 2020-05-05 S&C Electric Company Vacuum switching devices
US10796867B1 (en) * 2019-08-12 2020-10-06 Eaton Intelligent Power Limited Coil-type axial magnetic field contact assembly for vacuum interrupter
CN111261447A (zh) * 2020-01-20 2020-06-09 北京京东方真空电器有限责任公司 一种真空灭弧室触头、真空灭弧室及真空断路器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227482A1 (de) * 1982-07-20 1983-02-03 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Vakuumschalter-kontaktanordnung mit vorrichtung zur erzeugung eines achsialen magnetfeldes
DE3231593A1 (de) * 1982-08-25 1984-03-01 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer vakuumschalter
CA1236868A (fr) * 1983-03-15 1988-05-17 Yoshiyuki Kashiwagi Interrupteur sous vide
DE3334493A1 (de) * 1983-09-23 1985-04-04 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer vakuumschalter
DE3407088A1 (de) * 1984-02-27 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer vakuumschalter
DE3415743A1 (de) * 1984-04-26 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer einen vakuumschalter

Also Published As

Publication number Publication date
JPH0364816A (ja) 1991-03-20
EP0410049A1 (fr) 1991-01-30
US5064976A (en) 1991-11-12
DE58908842D1 (de) 1995-02-09
DE8915750U1 (fr) 1991-05-08

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