EP0079977B1 - Pièce de contact pour interrupteur électrique, en particulier pour interrupteur de protection - Google Patents

Pièce de contact pour interrupteur électrique, en particulier pour interrupteur de protection Download PDF

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Publication number
EP0079977B1
EP0079977B1 EP81109823A EP81109823A EP0079977B1 EP 0079977 B1 EP0079977 B1 EP 0079977B1 EP 81109823 A EP81109823 A EP 81109823A EP 81109823 A EP81109823 A EP 81109823A EP 0079977 B1 EP0079977 B1 EP 0079977B1
Authority
EP
European Patent Office
Prior art keywords
contact
supporting member
arc
arc conducting
intermediate part
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
EP81109823A
Other languages
German (de)
English (en)
Other versions
EP0079977A1 (fr
Inventor
Peter Koller
Hans Lüthy
Purnendu Chaudhuri
Hilmar Klepp
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8188026&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0079977(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Priority to EP81109823A priority Critical patent/EP0079977B1/fr
Priority to AT81109823T priority patent/ATE21298T1/de
Priority to DE8181109823T priority patent/DE3175072D1/de
Priority to JP57139089A priority patent/JPS5889721A/ja
Priority to US06/436,308 priority patent/US4472613A/en
Publication of EP0079977A1 publication Critical patent/EP0079977A1/fr
Application granted granted Critical
Publication of EP0079977B1 publication Critical patent/EP0079977B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts

Definitions

  • the present invention relates to a contact piece, preferably a contact bridge, for an electrical switching device, in particular for a contactor, according to the preamble of claim 1.
  • a contact bridge with a trough-shaped carrier is known, to which an intermediate part made of electrically conductive material is attached. Two contact pads are soldered onto this intermediate part.
  • the intermediate part has end parts which extend away from the contact pads and adjoin the end faces of the carrier. These end parts serve as arcing pieces.
  • a contact bridge in which the contact pads are attached directly to the bottom part of a U-shaped support and are connected to one another in an electrically conductive manner by means of a web (DE-AS 1 175776).
  • Arc guide pieces are attached to the end faces of the carrier and protrude from the base part of the carrier in the direction away from the contact pads. Since these arc guide pieces are made of steel, the arc base points move away from the contact pads more quickly than in the case of the contact bridge mentioned above.
  • the connection point between the contact pads and the carrier is attacked by the arcs, which migrate with their base points along the side of the contact pads to the arc guide pieces. The damage caused as a result, which is particularly significant with high switch-off currents, makes it necessary to replace the contact bridge after a relatively short period of use.
  • a contact bridge which has a contact bridge support with two contact pads attached to it at a mutual distance. These contact pads are connected to one another in an electrically conductive manner via the contact bridge carrier.
  • This contact bridge support is provided with beads which lie laterally on the contact supports and extend against the contact surface of the contact supports and end at a distance from these contact surfaces. These beads are formed in one piece with the contact bridge support and therefore, like this, consist of an electrically conductive material.
  • the object of the present invention is to create a contact piece of the type mentioned at the beginning which is simple in construction and manufacture and which, with the smallest possible mass, permits high switching numbers even with large breaking currents.
  • the arc guide piece extends to the height of the contact surface of the associated contact support, this contact surface and the end of the arc guide piece lie approximately in one plane, which is a prerequisite for the fastest possible passage of the arc base points onto the arc guide piece.
  • This rapid commutation of the arc foot arcs from the contact pad to the arc guide is effectively supported by the fact that the arc guide is made of ferromagnetic material and comes very close to the contact surface.
  • the arc guide made of ferromagnetic material is also resistant to erosion and has good arc running properties, so that the arcs are quickly guided away from the contact pad. Since the arc base points quickly move away from the contact surface, the erosion of the contact pads is reduced to a minimum. Accordingly, the wear of the contact piece according to the invention is low even with relatively large breaking currents, which enables the contact piece to be used for a correspondingly long time.
  • the carrier can be made of a material of high mechanical strength, so that the intermediate part essentially only has to ensure a good electrically conductive connection between the contact pads. This makes it possible to create a contact piece that is as small as possible and that can withstand strong electrical and mechanical stresses both when the contacts are closed and when the contacts are opened and closed.
  • the contact bridge 1 shown in the figures has a U-shaped carrier 2, which consists for example of steel.
  • the bottom part of the carrier 2 is designated 3 and its flanges 4.
  • An intermediate part 5 is fastened to the bottom part 3 of the carrier 2, preferably by brazing.
  • This intermediate part 5 consists of an electrically conductive material, preferably copper, and is provided on its side facing the carrier 2 with projections 6 and 7, each of which engages in a centering hole 8 or 9 in the base part 3. Through this zen Trierlöcher 8 and 9, the intermediate part 5 is positioned during its attachment to the carrier 2.
  • the intermediate part 5 On the side opposite the projections 6 and 7, the intermediate part 5 is provided in the region of its ends with elevations 10 and 11, respectively, on which contact supports 12, 13 are arranged, which are connected to the intermediate part 5 in a suitable manner, for example by brazing .
  • the contact pads 12 and 13 consist of a suitable contact material, for example AgCdO.
  • the carrier 2 gives the contact bridge 1 good mechanical strength, while the intermediate part 5 essentially only has the task of ensuring a good electrically conductive connection between the two contact pads 12 and 13. With a suitable design and / or choice of material, it is consequently possible to obtain a contact bridge 1 of low mass, which can withstand heavy electrical and mechanical loads.
  • plate-shaped arc guide pieces 14 and 15 are connected to it, for example also by brazing.
  • These arc guide pieces 14 and 15 consist of a ferromagnetic material, for example steel.
  • the arcs pass directly from the contact surface 12a or 13a of the contact pads 12, 13 to the associated arc guide piece 14 or 15, the arc base points are prevented from moving laterally along the contact pads to their connection points 16, 17, which is a undesired erosion of the contact pads 12, 13 and damage to the connection points 16, 17 would result.
  • the contact bridge 1 is thus protected against rapid wear by the formation of the arc guide pieces 14 and 15 even at high breaking currents, which has an advantageous effect on the service life of the contact bridge 1.
  • the contact bridge can also be designed differently than described as different parts.
  • the contact bridge described is particularly, if not exclusively, suitable for a contactor.
  • a preferred embodiment of such a contactor is the subject of the simultaneously filed European Patent Application No. 81 109 824.3 (EP-A-79978).

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Contacts (AREA)
  • Push-Button Switches (AREA)

Claims (7)

1. Pièce de contact pour un interrupteur électrique, un interrupteur de protection notamment, comportant un support (2), prévu pour un élément de contact au moins (12,13) muni d'une surface de contact (12a, 13a), ainsi qu'une pièce de guidage d'arc (14, 15), reliée au support (2), respectivement affectée à l'un des éléments de contact (12, 13), jusqù'auquel elle se prolonge en direction de la surface (12a, 13a), caractérisée en ce que la pièce de guidage d'arc (14, 15), essentiellement perpendiculaire au support (2), arrive au niveau de la surface de contact (12a, 13a) et se compose d'un matériau ferromagnétique.
2. Pièce de contact suivant la revendication 1, caractérisée en ce que deux éléments de contact (12, 13), reliés par une pièce intermédiaire conductrice (5), sont prévus sur l'une des faces du support (2).
3. Pièce de contact suivant une des revendications 1 et 2, caractérisée en ce que chaque pièce de guidage d'arc (14, 15) dépasse le support (2) sur ses deux côtés opposés.
4. Pièce de contact suivant les revendications 2 et 3, caractérisée en ce que les pièces de guidage d'arc (14, 15) sont disposées sur les faces frontales du support U (2), dont elles dépassent le fond (3) sur les deux côtés.
5. Pièce de contact suivant une quelconque des revendications 2 à 4, caractérisée en ce que les éléments de contact (12, 13) sont placés sur la pièce intermédiaire (5), assemblée avec le support (2).
6. Pièce de contact suivant la revendication 5, caractérisée en ce que le support (2) se compose d'un matériau doté d'une résistance mécanique supérieure à celle du matériau conducteur de la pièce intermédiaire (5).
7. Pièce de contact suivant une des revendications 5 et 6, caractérisée en ce que le support (2) présente au moins un trou de centrage (8, 9), dans lequel s'engage une saillie (6, 7) de la pièce intermédiaire (5).
EP81109823A 1981-11-21 1981-11-21 Pièce de contact pour interrupteur électrique, en particulier pour interrupteur de protection Expired EP0079977B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP81109823A EP0079977B1 (fr) 1981-11-21 1981-11-21 Pièce de contact pour interrupteur électrique, en particulier pour interrupteur de protection
AT81109823T ATE21298T1 (de) 1981-11-21 1981-11-21 Kontaktstueck fuer ein elektrisches schaltgeraet, insbesondere fuer ein schuetz.
DE8181109823T DE3175072D1 (en) 1981-11-21 1981-11-21 Contact piece for an electric switch apparatus, in particular for a protrective switch
JP57139089A JPS5889721A (ja) 1981-11-21 1982-08-10 電気回路開閉装置の接触片
US06/436,308 US4472613A (en) 1981-11-21 1982-10-25 Contact element arrangement for an electrical switching device, especially for a contactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81109823A EP0079977B1 (fr) 1981-11-21 1981-11-21 Pièce de contact pour interrupteur électrique, en particulier pour interrupteur de protection

Publications (2)

Publication Number Publication Date
EP0079977A1 EP0079977A1 (fr) 1983-06-01
EP0079977B1 true EP0079977B1 (fr) 1986-08-06

Family

ID=8188026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109823A Expired EP0079977B1 (fr) 1981-11-21 1981-11-21 Pièce de contact pour interrupteur électrique, en particulier pour interrupteur de protection

Country Status (5)

Country Link
US (1) US4472613A (fr)
EP (1) EP0079977B1 (fr)
JP (1) JPS5889721A (fr)
AT (1) ATE21298T1 (fr)
DE (1) DE3175072D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8500850U1 (de) * 1985-01-15 1985-04-25 Siemens AG, 1000 Berlin und 8000 München Kontaktbrücke
SE460812B (sv) * 1988-02-08 1989-11-20 Asea Brown Boveri Elkopplare
CH678989A5 (fr) * 1989-10-04 1991-11-29 Sprecher & Schuh Ag
EP0736887B1 (fr) * 1995-03-30 2002-05-29 Tyco Electronics Corporation Assemblage de contacts électriques
JP6213035B2 (ja) * 2013-08-12 2017-10-18 富士電機機器制御株式会社 電磁接触器
DE102013114401A1 (de) * 2013-12-18 2015-06-18 Eaton Industries Austria Gmbh Schaltbrücke für Schaltgerät
CN104766770B (zh) 2014-01-07 2017-09-08 西门子公司 断路器的静触头支架及其断路器
CN107452549B (zh) * 2016-05-31 2020-03-31 比亚迪股份有限公司 继电器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2340682A (en) * 1942-05-06 1944-02-01 Gen Electric Electric contact element
DE1175776B (de) * 1962-01-31 1964-08-13 Siemens Ag Kontaktbruecke fuer elektrische Schaltgeraete
DE1527353B2 (de) * 1963-10-04 1971-06-03 Licentia Patent Verwaltungs GmbH, 6000 Frankfurt Schaltstueck fuer ein elektrisches schaltgeraet
DE1202378B (de) * 1964-01-22 1965-10-07 Siemens Ag Elektrisches Schaltgeraet mit Schaltbruecke und Lichtbogenloeschkammer
JPS4216195Y1 (fr) * 1965-05-22 1967-09-19
DE1665849A1 (de) * 1967-01-16 1971-04-15 Siemens Ag Elektrisches Schaltgeraet mit einer um ihre Querachse kippbar gelagerten Kontaktbruecke
FR1544754A (fr) * 1967-09-22 1968-11-08 Merlin Gerin Dispositif de contact à pression directe
DE2161616C2 (de) * 1971-12-11 1973-12-20 Siemens Ag, 1000 Berlin U. 8000 Muenchen Wannenförmige Kontaktbrücke
DE2647888C3 (de) * 1976-10-22 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Wannenförmige Kontaktbrücke
DE2916276C2 (de) * 1979-04-21 1986-04-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltgerät
DE2928557A1 (de) * 1979-07-14 1981-01-29 Bbc Brown Boveri & Cie Kontakttraeger

Also Published As

Publication number Publication date
EP0079977A1 (fr) 1983-06-01
US4472613A (en) 1984-09-18
DE3175072D1 (en) 1986-09-11
JPS5889721A (ja) 1983-05-28
ATE21298T1 (de) 1986-08-15

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