EP0187951B1 - Contact interrupteur pour un interrupteur sous vide - Google Patents

Contact interrupteur pour un interrupteur sous vide Download PDF

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Publication number
EP0187951B1
EP0187951B1 EP85115664A EP85115664A EP0187951B1 EP 0187951 B1 EP0187951 B1 EP 0187951B1 EP 85115664 A EP85115664 A EP 85115664A EP 85115664 A EP85115664 A EP 85115664A EP 0187951 B1 EP0187951 B1 EP 0187951B1
Authority
EP
European Patent Office
Prior art keywords
contact
arms
ring
switch contact
switch
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
Application number
EP85115664A
Other languages
German (de)
English (en)
Other versions
EP0187951A1 (fr
Inventor
Günter Bialkowski
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
Publication of EP0187951A1 publication Critical patent/EP0187951A1/fr
Application granted granted Critical
Publication of EP0187951B1 publication Critical patent/EP0187951B1/fr
Expired 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
    • H01H33/6644—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact
    • 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
    • H01H33/6643—Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves

Definitions

  • the invention relates to a switching contact for a vacuum interrupter with a contact pin, a contact piece and a one-part or multi-part contact surface and with an annular, arranged between the contact pin and the contact piece, by means of webs running radially in its inner region, forming two or more conductor loops for the production a magnetic field running in the axial direction of the switching contact, the conductor loops being formed by radial webs connected to the contact bolt, partial area of the ring and radial webs of the annular body connected to the contact piece, each web belonging to two adjacent conductor loops and the electrical connection between the radial webs of the ring-shaped body and the areas producing the contact bolt or the contact piece - hereinafter referred to as connection areas - of the radial webs by means of an electrically poor - or non-conductive support body ers are supported in the direction of the axis of the switch contact.
  • a vacuum interrupter with a switch contact of this type has become known from US-A 4196327.
  • the current in the area of the outer circumference passes into a contact piece, while in a further embodiment the current is returned to the vicinity of the axis of rotation of the contact and is transferred there to corresponding contact surfaces of the contact piece.
  • the first of the above-mentioned embodiments which allows the current to pass into the contact piece in the region of the outer circumference of the conductor loop, results in a strength of the axial magnetic field which is dependent on the distance of the arc from the edge of the conductor loop. This non-uniformity of the magnetic field is not desirable.
  • the second embodiment avoids this unevenness of the magnetic field, but is relatively complex to manufacture, since a horizontal slot has to be made in workpiece parts arranged within a ring, for which purpose a special tool is required.
  • this embodiment does not permit dimensioning to the highest load on the material, since the webs leading to the center of the ring and thus to the contact surfaces can have only a small part of the height of the conductor loops in the region of the circumference.
  • a very wide design of the webs would inadmissibly reduce the area penetrated by the axial field.
  • a high weight of the conductor loop compared to the power must be accepted.
  • the invention is based on the object of making a switch contact of the type mentioned easier to manufacture, making the conductor loops mechanically stable and thereby reducing their weight with the same size and load capacity of the contact piece and a large part of the contact area with the generated axial field to capture.
  • connection areas of the radial webs are each approximately circular sector-shaped, that each web is assigned its own connection area which is separated from the connection areas of the other webs by distances, and that the connection areas with their one Side in the circumferential direction is alternately electrically conductively connected to the end face of the contact bolt or to the connection surface of the contact piece in a low-resistance manner, while the support bodies are arranged between the opposite sides of these connection areas and the surface of the contact piece or contact pin facing them.
  • the webs of the conductor loops can have an extension in the axial direction that is independent of the height of their part remote from the axis. Their cross-sections can therefore be designed for the maximum current load in each section.
  • connection regions which follow one another in the circumferential direction with the spacings can lie opposite one another on both sides of a plane passing through the axis of rotation of the switching contact.
  • the webs can be designed twice as wide as the ring. This ensures that the webs and the circular ring are equally loaded when all loops are subjected to a uniform current.
  • the support bodies can be formed in one piece and can have the shape of two ring sectors, which are connected to one another by a web running through the contact axis.
  • each contact pin has to be dimensioned essentially according to the current carrying capacity and not so much according to the mechanical strength, it is advantageous if each contact pin has a part with an enlarged cross section adjacent to its end face and the connection areas of the webs cover the enlarged cross section of the part.
  • FIGS. 2 to 4 show arrangements of conductor loops according to the invention in plan view or in a radial section.
  • a contact pin 1 has a part 13 adjacent to its end face 14 with an enlarged cross section.
  • An arrangement 2 of conductor loops 11, 12 is applied to the end face 14 of the contact bolt 1.
  • the connection areas 6 of the conductor loops 11, 12 are electrically conductively connected to the end face 14 of the contact bolt 1, for example welded onto the end face 14.
  • a contact piece 3 is placed on the arrangement 2 of conductor loops 11, 12.
  • the contact piece 3 is connected to corresponding connection areas 7 of the conductor loops 11, 12 in an electrically conductive manner, for example welded (FIG. 2).
  • connection areas 6, 7 are mechanically supported by electrically poorly or non-conductive support bodies 8 against the end face 14 of the contact pin 1 or against the contact piece 3 on their sides, the support faces 24, which are not connected to the contact piece or the contact pin with low resistance.
  • the support body 8 can consist of ceramic or poorly conductive metal. They are only subjected to pressure, so that no special requirements regarding their strength have to be made of the material of these intermediate layers.
  • the embodiment shown results in four conductor loops, each of which two conductor loops lying opposite one another with respect to the axis of rotation of the contact generate a magnetic field of the same direction and are therefore numbered 11 and 12 with the same designation.
  • the adjacent conductor loops generate a magnetic field in the opposite direction.
  • the individual conductive loops 11, 12 do not have to be insulated from one another, so that the compact, mechanically fixed embodiment according to the invention is possible.
  • the number of conductor loops generated in this way is basically not limited. For example, two semicircular conductor loops can advantageously also be formed.
  • a pot contact 3 with an obliquely slotted cylinder wall and a contact disk 4 is shown as the contact piece, the contact disk 4 being a circular disk or a ring with a coaxial hole that is relatively small compared to the circumference.
  • a plate contact can also be used, for example, whereby the overall height of the contact and thus its mass can be reduced.
  • connection areas 6, 7 with the support body 8 and the conductor loops 11, 12 have the same dimensions in the axial direction. Not only is it possible to make contact with flat surfaces of the connecting bolt or the contact piece, but also a very small distance from the contact piece. This results in a relatively large field strength in the axial direction in the region of the contact surface, in particular in the case of flat contact pieces.
  • the coaxial bore 16 serves as a centering bore when welding or soldering the conductor loops onto the contact bolt or the contact piece.
  • the bore 16 can also serve to receive a fastening screw which connects the contact piece and the conductor loops to the contact bolt.
  • a design with great mechanical stability and a small electrical shunt to the conductor loops through the support bodies is provided if the support bodies according to FIG. 4 are formed in one piece for two connection areas, which are opposite one another with respect to the contact axis, and have the shape of two ring sectors 18, which are connected to one another by a web 19 enclosing the contact axis 17.
  • a bore 16 in the web 18 and in the connection areas 20 to 23 underneath serves to center the support bodies 18 and 19, the connection areas 20 to 23 and possibly the contact piece 3 and the contact pin 1.

Landscapes

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

Claims (6)

1. Contact de coupure pour un interrupteur à vide comportant un boulon de contact (1), une pièce de contact (3) munie d'une surface de contact formée d'une ou de plusieurs parties, et un corps de forme annulaire, qui est disposé entre le boulon de contact (1) et la pièce de contact (3), forme deux ou plusieurs boucles de conducteurs au moyen de barrettes (10) disposées radialement dans sa partie intérieure et sert à produire un champ magnétique s'étendant dans la direction axiale du contact de coupure, et dans lequel les boucles de conducteurs (11, 12) sont formées par des barrettes radiales (10) reliées au boulon de contact (1), des zones partielles (5) de l'anneau et des barrettes radiales (10), reliées à la pièce de contact (3), du corps annulaire (2), chaque barrette (10) appartenant respectivement à deux boucles voisines de conducteurs (11, 12) et de zones (6, 7), qui établissent la liaison électrique entre les barrettes radiales (10) du corps annulaire (2) et le boulon de contact (1) ou la pièce de contact (3) - désignées ci-après sous le terme de zones de liaison (6, 7) - sont soutenues par les barrettes radiales (10) au moyen d'un corps de support (8) mauvais conducteur ou non conducteur de l'électricité, dans la direction de l'axe du contact de coupure, caractérisé par le fait que les zones de liaison (6, 7) des barrettes radiales (10) sont réalisées respectivement approximativement sous la forme de secteurs circulaires, qu'à chaque barette (10) est associée une zone particulière qui fait partie de ces zones de liaison (6, 7) et est séparée des zones de liasion (6, 7) des autres barrettes par des intervalles (9), et que les zones de liaison (6, 7) sont reliées par une de leurs faces, successivement en alternance dans la direction circonférentielle, selon une liaison électriquement conductrice de faible valeur ohmique, à la face frontale (14) du boulon de contact (1) ou à la surface de raccordement (15) de la pièce de contact (3), tandis que les corps de support (8) sont disposés entre les faces en vis-à-vis de ces zones de liaison (6, 7) et la surface, tournée vers ces zones, de la pièce de contact (3) ou du boulon de contact (1 ).
2. Contact de coupure suivant la revendication 1, caractérisé par le fait que les zones de liaison (6, 7), qui se succèdent dans la direction circonférentielle en étant séparées par des intervalles (9), sont dispoées en vis-à-vis des deux côtés d'un plan passant par l'axe de rotation du contact de coupure.
3. Contact de coupure suivant la revendication 2, caractérisé par le fait que les barrettes (10) possèdent une largeur double de celle de l'anneau (2).
4. Contact de commutation suivant la revendication 3, caractérisé par le fait que la surface de chaque zone de liaison (6, 7) des barrettes (10) est en retrait, dans la direction axiale du contact de coupure, par rapport à la surface de telles zones voisines, de sorte que les corps de support (8) se terminent, dans la direction axiale, dans un plan passant par les surfaces de zones de liaision voisines.
5. Contact de coupure suivant la revendication 4, caractérisé par le fait que les corps de support (8) pour deux zones respectives de liaison (6, 7) diamétralement opposées sont réalisés d'un seul tenant et possèdent la forme de deux secteurs annulaires (18), qui sont reliés entre eux par une barrette (19) passant par l'axe du contact (figure 4).
6. Contact de coupure suivant l'une des revendications 1 à 5, caractérisé par le fait que sur chaque boulon de contact (1) se trouve formée par façonnage une partie (13), qui jouxte la surface frontale de ce boulon et possède une section transversale accrue et que les zones de liaison (6, 7) des barrettes recouvrent la section transversale accrue de la partie (13).
EP85115664A 1984-12-18 1985-12-09 Contact interrupteur pour un interrupteur sous vide Expired EP0187951B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3446164 1984-12-18
DE3446164 1984-12-18

Publications (2)

Publication Number Publication Date
EP0187951A1 EP0187951A1 (fr) 1986-07-23
EP0187951B1 true EP0187951B1 (fr) 1989-07-05

Family

ID=6253110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115664A Expired EP0187951B1 (fr) 1984-12-18 1985-12-09 Contact interrupteur pour un interrupteur sous vide

Country Status (4)

Country Link
US (1) US4675482A (fr)
EP (1) EP0187951B1 (fr)
JP (1) JPS61147416A (fr)
DE (2) DE8437054U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8653396B2 (en) 2011-09-28 2014-02-18 Eaton Corporation Vacuum switch and hybrid switch assembly therefor
US9552941B1 (en) 2015-08-24 2017-01-24 Eaton Corporation Vacuum switching apparatus and electrical contact therefor
EP3144946A1 (fr) * 2015-09-18 2017-03-22 ABB Schweiz AG Système de contact électrique basse tension avec effet de soufflage d'arc amélioré
US9922777B1 (en) 2016-11-21 2018-03-20 Eaton Corporation Vacuum switching apparatus and electrical contact therefor
US10410813B1 (en) 2018-04-03 2019-09-10 Eaton Intelligent Power Limited Vacuum switching apparatus and electrical contact therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711665A (en) * 1971-02-16 1973-01-16 Allis Chalmers Mfg Co Contact with arc propelling means embodied therein
JPS58810B2 (ja) * 1976-12-06 1983-01-08 株式会社日立製作所 真空しや断器
DE3173171D1 (en) * 1980-12-22 1986-01-23 Mitsubishi Electric Corp Vacuum interrupter

Also Published As

Publication number Publication date
US4675482A (en) 1987-06-23
DE3571362D1 (en) 1989-08-10
EP0187951A1 (fr) 1986-07-23
JPS61147416A (ja) 1986-07-05
DE8437054U1 (de) 1986-06-26

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