EP0358288A2 - Agencement de contact pour un disjoncteur de puissance avec contacts auxiliaires et contacts principaux - Google Patents

Agencement de contact pour un disjoncteur de puissance avec contacts auxiliaires et contacts principaux Download PDF

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Publication number
EP0358288A2
EP0358288A2 EP89250028A EP89250028A EP0358288A2 EP 0358288 A2 EP0358288 A2 EP 0358288A2 EP 89250028 A EP89250028 A EP 89250028A EP 89250028 A EP89250028 A EP 89250028A EP 0358288 A2 EP0358288 A2 EP 0358288A2
Authority
EP
European Patent Office
Prior art keywords
contacts
contact
main contacts
movable
circuit breaker
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
EP89250028A
Other languages
German (de)
English (en)
Other versions
EP0358288B1 (fr
EP0358288A3 (fr
Inventor
Clifford A. Buxton
David A. Leone
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 EP0358288A2 publication Critical patent/EP0358288A2/fr
Publication of EP0358288A3 publication Critical patent/EP0358288A3/fr
Application granted granted Critical
Publication of EP0358288B1 publication Critical patent/EP0358288B1/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
    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/383—Arcing contact pivots relative to the movable contact assembly
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • the invention relates to a contact arrangement for a circuit breaker with fixed main contacts and a pre-contact and with a pivotally mounted relative to these contacts, also having main contacts and a pre-contact contact lever and with a device for accelerated transfer occurring at the main contacts switching arcs to the pre-contacts.
  • a contact arrangement of this type is known for example from DE-A-22 18 420 and DE-A-35 39 673.
  • the contact arrangement according to DE-A-22 18 420 has quenching plates of such a widened design that their legs formed by incisions encompass both the preliminary contacts and the main contacts with a short distance. To accommodate such quenching plates, however, appropriately wide quenching chambers are required, which are not in themselves necessary for the switching process.
  • the contact arrangement according to DE-A-35 39 673 makes it possible to use a relatively narrow arcing chamber, the width of which is less than the total width of the arrangement consisting of a plurality of main contacts arranged in parallel and a middle pair of preliminary contacts. The transfer at the main contacts of switching arcs arising to the pre-contacts takes place here by means of special arcing elements made of ferromagnetic material.
  • the invention has for its object to bring about the transfer of the switching arcs on the main contacts to the pre-contacts in a simpler manner and in particular without additional parts.
  • the movable contact lever has a depression near the main contacts on its underside facing away from and making contact and likewise has a depression in front of it on the opposite top side.
  • the depressions of the contact lever can have a rounded contour on their base, the depression provided on the contact-making underside of the contact lever being arranged immediately after the main contact located there. With good effectiveness, this arrangement avoids an adverse influence on the strength of the contact lever.
  • An important advantage of the contact arrangement according to the invention is that the device for driving the switching arcs on the main contacts is an integral part of the contact lever and is in the immediate vicinity of the main contacts.
  • the contact arrangement shown in the figure can be, for example, the part of the current path of a compact low-voltage circuit breaker with an insulating housing (MCCB).
  • the current path comprises a stationary connecting rail 10 with a current-transmitting joint arrangement 12, to which a joint region 14 with a circular contour belongs at the end of a contact lever 18 which is pivotably mounted about a pivot axis 16.
  • the contact lever 18 is provided with a plurality of main contacts arranged parallel to one another and with an arcing horn 22 and a pre-contact 24 attached to it.
  • a further fixed connecting rail 26 Opposite the movable contacts 20 and 24 attached to the contact lever 18 is a further fixed connecting rail 26, which carries fixed main contacts 28 and a fixed pre-contact 30.
  • the contact lever 18 ensures that such switching arcs are transferred as quickly as possible to the pre-contacts 24 and 30, from which they are known in a known manner via arcing horns get into an extinguishing chamber.
  • the contact lever 18 has a depression 32 on its contacting underside immediately following the area of the main contacts 20.
  • a further depression 34 is arranged at a distance from this on the opposite upper side of the contact lever 18, which depression is formed by the kink.
  • the current flowing through the contact lever 18 through the recesses 32 and 34 is caused to loop in such a way that current threads flow locally in parallel planes 38 and 40, which extend on both sides of the recess 32.
  • the plane 40 runs approximately through the axes of the main contacts 20 and 28.
  • areas 42 and 44 arise in the planes 38 and 40 due to the deflection of the current filaments, in which the direction of the current is opposite.
  • the current loop formed in this way tends to expand in the direction of the pre-contacts 24 and 30 and thus quickly transfer the switching arcs ignited at the main contacts 20 and 28 to the pre-contacts 24 and 30 and the subsequent arcing horn 22 located at the end of the contact lever 18.
  • the effect of the current loop can be made stronger or weaker. If, for example, the depression 34 is designed as a kink or offset according to the drawn-out contour of the contact lever 18, the loop effect is less than with an even more extensive depression approximately corresponding to the dashed contours 46 and 48.
  • the areas 42 and 44 in the course of the current path 36, which are traversed by the current antiparallel, have different lengths depending on the design of the recess 32 and therefore result in a more or less pronounced loop effect.
  • the depressions have a rounded contour.
  • the strength of the contact lever 18 is influenced as little as possible.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP89250028A 1988-09-08 1989-09-07 Agencement de contact pour un disjoncteur de puissance avec contacts auxiliaires et contacts principaux Expired - Lifetime EP0358288B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/242,094 US4926018A (en) 1988-09-08 1988-09-08 Moving mains arc movement loop
US242094 1988-09-08

Publications (3)

Publication Number Publication Date
EP0358288A2 true EP0358288A2 (fr) 1990-03-14
EP0358288A3 EP0358288A3 (fr) 1991-01-02
EP0358288B1 EP0358288B1 (fr) 1995-03-08

Family

ID=22913430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89250028A Expired - Lifetime EP0358288B1 (fr) 1988-09-08 1989-09-07 Agencement de contact pour un disjoncteur de puissance avec contacts auxiliaires et contacts principaux

Country Status (5)

Country Link
US (1) US4926018A (fr)
EP (1) EP0358288B1 (fr)
JP (1) JPH02117022A (fr)
CA (1) CA1333183C (fr)
DE (1) DE58909080D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3579261A1 (fr) * 2018-06-08 2019-12-11 ABB Schweiz AG Disjoncteur haute tension
US10879023B1 (en) * 2019-06-12 2020-12-29 Landis+Gyr Innovations, Inc. Progressively contacting switch

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1100811A (fr) * 1952-10-21 1955-09-26 Voigt & Haeffner Ag Disjoncteur
US2777921A (en) * 1953-06-16 1957-01-15 Merlin Gerin Face-on-face contact pair for circuit breakers
US3192344A (en) * 1961-08-28 1965-06-29 Fed Pacific Electric Co High interrupting capacity circuit breakers with electrodynamic latch release
FR1544437A (fr) * 1966-11-16 1968-10-31 Licentia Gmbh Dispositif de contacts électriques
CH531785A (de) * 1971-04-01 1972-12-15 Westinghouse Electric Corp Elektrischer Schalter mit Lichtbogenlöschvorrichtung
EP0206882A1 (fr) * 1985-06-12 1986-12-30 Merlin Gerin Disjoncteur basse tension à coupure améliorée
EP0222684A1 (fr) * 1985-11-06 1987-05-20 Siemens Aktiengesellschaft Montage de contacts pour interrupteur à charge à basse tension avec des contacts principaux et des contacts d'amorçage d'arc

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345485A (en) * 1964-12-30 1967-10-03 Fed Pacific Electric Co Circuit breaker having improved arcing contact structure
US3585329A (en) * 1968-01-24 1971-06-15 Westinghouse Electric Corp Circuit interrupter with improved contact structure and arc-runner
JPS6147035A (ja) * 1984-08-10 1986-03-07 富士電機株式会社 回路遮断器の接触子構造

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1100811A (fr) * 1952-10-21 1955-09-26 Voigt & Haeffner Ag Disjoncteur
US2777921A (en) * 1953-06-16 1957-01-15 Merlin Gerin Face-on-face contact pair for circuit breakers
US3192344A (en) * 1961-08-28 1965-06-29 Fed Pacific Electric Co High interrupting capacity circuit breakers with electrodynamic latch release
FR1544437A (fr) * 1966-11-16 1968-10-31 Licentia Gmbh Dispositif de contacts électriques
CH531785A (de) * 1971-04-01 1972-12-15 Westinghouse Electric Corp Elektrischer Schalter mit Lichtbogenlöschvorrichtung
EP0206882A1 (fr) * 1985-06-12 1986-12-30 Merlin Gerin Disjoncteur basse tension à coupure améliorée
EP0222684A1 (fr) * 1985-11-06 1987-05-20 Siemens Aktiengesellschaft Montage de contacts pour interrupteur à charge à basse tension avec des contacts principaux et des contacts d'amorçage d'arc

Also Published As

Publication number Publication date
EP0358288B1 (fr) 1995-03-08
DE58909080D1 (de) 1995-04-13
US4926018A (en) 1990-05-15
CA1333183C (fr) 1994-11-22
JPH02117022A (ja) 1990-05-01
EP0358288A3 (fr) 1991-01-02

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