EP0187951A1 - Contact interrupteur pour un interrupteur sous vide - Google Patents

Contact interrupteur pour un interrupteur sous vide Download PDF

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Publication number
EP0187951A1
EP0187951A1 EP85115664A EP85115664A EP0187951A1 EP 0187951 A1 EP0187951 A1 EP 0187951A1 EP 85115664 A EP85115664 A EP 85115664A EP 85115664 A EP85115664 A EP 85115664A EP 0187951 A1 EP0187951 A1 EP 0187951A1
Authority
EP
European Patent Office
Prior art keywords
contact
connections
conductor loops
axis
switching
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.)
Granted
Application number
EP85115664A
Other languages
German (de)
English (en)
Other versions
EP0187951B1 (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 present invention relates to a switch contact for a vacuum interrupter according to the preamble of claim 1.
  • 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 field 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 in 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 must be made within a ring, for which a special tool is required.
  • this embodiment does not allow 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.
  • the present invention has for its object to make a switch contact according to the preamble of claim 1 easier to manufacture, to make the conductor loops mechanically stable and thereby reduce 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 capture.
  • the characterizing features of claim 1 Due to the arrangement of the connections of the conductor loops distributed over the end face of the contact bolt or over a corresponding contact surface of the contact piece, 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.
  • the slots that separate the contact surfaces can also be placed obliquely or asymmetrically, provided that contact surfaces lying next to one another only in the circumferential direction and support surfaces arise on the non-contacted end face.
  • Simple manufacture is ensured if the slots are parallel to a plane which contains the axis of rotation of the switching contact.
  • a symmetrical and therefore particularly highly resilient embodiment is achieved if the plane of symmetry of the slots contains the axis of rotation of the switching contacts.
  • an embodiment is advantageous in which intermediate layers with low electrical conductivity are arranged on the side of the connections which is not contacted with low resistance.
  • Such intermediate layers can consist of ceramic or also of high-resistance metals, for example of stainless steel. From a mechanical point of view, they are only subjected to pressure.
  • the conductor loops advantageously consist of a common circular ring and webs integrally formed thereon, the webs having the same extent in the axial direction as the circular ring.
  • the webs preferably have twice the width of the circular ring, so that the webs and the circular ring are equally loaded when all loops are subjected to a uniform current.
  • the support surfaces are set back in the axial direction with respect to the surface of adjacent connections and if the intermediate layers are flush with the adjacent connections in the axial direction .
  • the intermediate layers are advantageously used in the form of platelets in corresponding depressions or the recessed parts of the connections.
  • the recessed parts of the connections can be formed by machining deformation, by stamping or, if necessary, when casting the conductor loops.
  • the contact pin essentially has to be dimensioned according to the current carrying capacity, not so much according to the mechanical strength, it is advantageous that a part with an enlarged cross section adjoining the end face is formed on the contact pin and that the connections of the conductor loops cover this enlarged cross section. As a result, thermal overloading of the material is avoided in the area of the current transfer from the contact pin to the connections of the conductor loops, although only a part of the end face of the contact pin is available for low-resistance contacting of the connections in this area.
  • a contact pin 1 has a part 13 adjoining 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 connections 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 electrically conductively connected to the connections 7 of the conductor loops 11, 12, for example welded (FIG. 2).
  • the connections 6, 7 are mechanically supported via electrically poorly or non-conductive intermediate layers 8 against the end face 14 of the contact pin 1 or against the contact piece 3 on their sides which are not connected to the contact piece or the contact pin, the support surfaces 24.
  • the intermediate layers 8 can consist of ceramic or of poorly conductive metal. They are only subjected to pressure in the embodiment according to the invention, so that no special requirements with regard to 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 create a magnet field of opposite direction.
  • the individual conductor 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.
  • connections 6, 7 with the intermediate layers 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 hold a fastening screw which connects the contact piece and the conductor loops with the contact bolt.
  • FIG. 4 An embodiment with great mechanical stability and a small electrical shunt to the conductor loops through the intermediate layers is provided if the intermediate layers according to FIG. 4 are formed in one piece for two connections 20, 21 opposite each other with respect to the contact axis and the shape of two ring sectors 18 have, which are connected to each other by a web 19 enclosing the contact axis 17.
  • a bore 16 in the web 18 and in the connections 20 to 23 below it serves to center the intermediate layer 18 and 19, the connections 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)
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 true EP0187951A1 (fr) 1986-07-23
EP0187951B1 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207242A1 (de) * 1971-02-16 1972-08-31 Allis Chalmers Kontakt mit eingebetteter Lichtbogentreibeinrichtung
US4196327A (en) * 1976-12-06 1980-04-01 Hitachi, Ltd. Vacuum interrupter
EP0055008A2 (fr) * 1980-12-22 1982-06-30 Mitsubishi Denki Kabushiki Kaisha Interrupteur à vide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207242A1 (de) * 1971-02-16 1972-08-31 Allis Chalmers Kontakt mit eingebetteter Lichtbogentreibeinrichtung
US4196327A (en) * 1976-12-06 1980-04-01 Hitachi, Ltd. Vacuum interrupter
EP0055008A2 (fr) * 1980-12-22 1982-06-30 Mitsubishi Denki Kabushiki Kaisha Interrupteur à vide

Also Published As

Publication number Publication date
DE8437054U1 (de) 1986-06-26
DE3571362D1 (en) 1989-08-10
JPS61147416A (ja) 1986-07-05
US4675482A (en) 1987-06-23
EP0187951B1 (fr) 1989-07-05

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