EP0164632B1 - Dispositif d'extinction d'arc - Google Patents

Dispositif d'extinction d'arc Download PDF

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Publication number
EP0164632B1
EP0164632B1 EP85106486A EP85106486A EP0164632B1 EP 0164632 B1 EP0164632 B1 EP 0164632B1 EP 85106486 A EP85106486 A EP 85106486A EP 85106486 A EP85106486 A EP 85106486A EP 0164632 B1 EP0164632 B1 EP 0164632B1
Authority
EP
European Patent Office
Prior art keywords
arc
guide rail
splitter assembly
region
adjacent
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
EP85106486A
Other languages
German (de)
English (en)
Other versions
EP0164632A2 (fr
EP0164632A3 (en
Inventor
Klaus Dipl.-Ing. Greefe
Richard Dipl.-Ing. Kommert
Rudolf Sellner
Erwin Ing. Muders (Grad.)
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
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 Asea Brown Boveri AG Germany filed Critical Asea Brown Boveri AG Germany
Publication of EP0164632A2 publication Critical patent/EP0164632A2/fr
Publication of EP0164632A3 publication Critical patent/EP0164632A3/de
Application granted granted Critical
Publication of EP0164632B1 publication Critical patent/EP0164632B1/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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts

Definitions

  • the invention relates to an arc extinguishing device according to the preamble of claim 1.
  • Arc-quenching devices have an arc-quenching plate package, which is surrounded by an envelope which normally covers the two quenching plates located at the outer ends of the arc-quenching plate package and the rear edges of the quenching plates, with recesses being provided in the end wall of the envelope overlapping the rear edges, which provide the arc gases allow exit from the stack of quenching sheets.
  • the upper and lower cover plates are also those Provide plates on the upper and lower quenching plates with a recess so that the arc does not move forward to the contact point and can be ignited again in the front area of the arc quenching plate package.
  • an arc extinguishing device has become known in which a plurality of arc extinguishing plates are arranged between two arc guide rails and are surrounded by a covering covering the side planes and the rear plane.
  • the arc extinguishing sheet package thus formed is held on the one hand between the arc guide rail carrying the fixed contact piece, adjacent to a housing wall, and another, opposite housing wall, and in the area away from the arc, the envelope has a slight reduction in height, measured in the direction of the stack of extinguishing sheets.
  • the running away of the arc from the contact points and the formation of a higher arc voltage is essentially caused by the assignment of the movable contact piece to the fixed contact piece and a U-shaped blow loop formed thereby to the arc extinguishing sheet packet, an exhaust space or swirling space being provided on the exhaust gas side, into which the arc extinguishing gas is provided is blown off.
  • the formation of the sheathing does not improve the running away of the arc from the contact points and the formation of a higher arc voltage.
  • the entry speed of the arc base points on the guide rails is increased significantly measurably, because of the enlarged exhaust openings between the first or last plate and guide rails a faster pressure reduction is possible here.
  • the arc base points on the guard rails are greatly accelerated, which leads to a faster arc entry overall.
  • a current-limiting voltage is built up more quickly than with the known casings, which improves the current-limiting effect of the switching device.
  • This wrapping can be used particularly advantageously in the case of arc-quenching plate assemblies which are used in circuit breakers.
  • the sheath can keep additional arc quenching plates at a distance, so that the sheath performs two functions simultaneously.
  • the shortening of the guide rails essentially serves to prevent the arc from short-circuiting behind the chamber and, on the other hand, to enlarge the exhaust air opening, so that thermal build-up effects which drive the arc forward towards the contact point are avoided.
  • a normal, commercially available electrical circuit breaker has a contact point 12 formed from a movable contact piece 10 and a fixed contact piece 11, between which an arc 13 is drawn in the switching-off process.
  • the movable contact piece 10 is fastened to a contact lever 14 (molded on here), which is actuated by a switch lock due to a short-circuit or overload current case.
  • the overload current release can be a bimetal and the short-circuit current release can be an electromagnetic release.
  • the fixed contact piece 11 is fastened to an arc guide rail 15 which is arranged opposite another arc guide rail 16, between which an arc quenching plate packet 17 is arranged.
  • the arc 13 which arises during a switching operation is expanded on account of an electromagnetic blowing field, which is formed, for example, from the assignment of the movable contact lever 14 with the contact piece 10 to the fixed contact piece 11 with the arc guide rail 15, and is driven into the arc quenching plate packet 17, where it is extinguished .
  • the arc quenching plate packet consists of several superimposed arc quenching plates 18, which are designed in the usual way; this configuration is not important for the invention.
  • the arc quenching plates 18 of the arc quenching plate stack 17 are kept at a distance by means of a sheath 19.
  • two protruding lugs or cams 20 and 21 or 22 and 23 are formed on both sides of the arc extinguishing plates 18, which are pressed into openings 24 and 25 on the side walls 19 'of the casing 19 or, conversely, the openings 24 and 25 are pressed over the lugs 20, 21, 22 and 23 in such a way that the lugs reach through the side walls 19 'of the casing 19.
  • the outer surfaces of the outer arc quenching plates are at a distance B from one another. It can be seen from Fig. 3 that the two side walls protrude in a partial area C, the arc extinguisher stack, both upwards and downwards (indicated by C o and C u in Fig. 3).
  • the sheathing and in particular the side walls 19 ′ have a partial region D to the rear, that is to say in the direction of the exhaust gas, the height H of which corresponds to the distance B between the two outer surfaces of the arc-quenching plate stack 17.
  • the transition between subarea C and subarea D takes place via a transition radius 27 in the upper part and 28 in the lower part.
  • the two side walls 19 ' are connected by means of a connecting plate 30 (rear or end wall), whereby an approximately U-shaped envelope is formed, of which the two legs form the side walls 19' and the web forms the rear wall 30.
  • This sheathing not only serves to prevent reignitions on the sides or the rear side of the arc quenching plate packet 17, but rather the side walls 19 ' also serve to keep the arc quenching plates spaced apart from one another.
  • exhaust openings 31 are provided, which are designed in a generally customary embodiment.
  • the arc guide rail 15 lies directly against a housing wall 32.
  • the housing wall 32 has a recess 33, into which the arc guide rail 15 is inserted.
  • the housing also has a projection 34, which covers part of the arc guide rail 15, which can be seen in FIG. 2, as a result of which the arc guide rail is fixed to the housing 32.
  • the envelope known per se receives recesses which are formed by the transitions 27 and 28; in the area of the two Guide rails 15 and 16 in the upper and in the lower area and in the front area, the casing 19 projects with its side walls 19 ′ above and below the arc-quenching plate packet 17.
  • the recess at 28 is also advantageous insofar as the recess at 28 leaves space for a projection 34 to be provided in the housing part 32 (see FIG.), Which fixes the lower guide rail.
  • the two guide rails end in front of the rear edge of the arc-quenching plate package, with the guide rail 16 in the step region at 27 and the guide rail 15 a little way in front of the rear edge of the Arc quenching sheet package ends.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (1)

  1. Dispositif d'extinction d'arc pour un appareil de coupure électrique, comportant un point de contact (12) au niveau duquel lors de son ouverture au cours de l'opération de coupure, un arc électrique (13) est amorçé, un empilage d tôles d'extinction d'arc (17) qui se trouve entre deux rails de guidage d'arc (15, 16) et dans lequel l'arc électrique entre le long des rails de guidage et est éteint, et une enveloppe (19) pour l'empilage de tôles d'extinction, qui recouvre les deux côtés de l'empilage de tôles d'extinction d'arc s'étendant transversalement aux tôles d'extinction, par des parois latérales (19'), et le côté arrière de l'empilage de tôles d'extinction d'arc par une paroi de fermeture (30), les parois latérales (19') dépassant l'empilage de tôles d'extinction (17) dans une zone partielle (C) se trouvant en direction du point de contact (12) et présentant dans une zone arrière (D) avec la paroi de fermeture approximativement la hauteur de l'empilage de tôles d'extinction, caractérisé en ce que deux retours symétriques sont prévus dans la zone de la transition entre la zone partielle (C) et la zone arrière (D), en ce que le rail de guidage d'arc (16) voisin de la culasse d'aimant se termine dans la zone dans laquelle se trouve l'extrémité avant de la zone de transition voisine, en ce que le rail de guidage d'arc se trouvant contre une paroi (32) du boîtier est, dans la zone éloignée du point de contact, partiellement recouvert par une saillie (34) formée sur la paroi de boîtier (32) pour guider le rail de guidage d'arc (15) et en ce que le rail de guidage d'arc (15) voisin du boîtier est nettement plus étroit que le rail de guidage d'arc (16) voisin de la culasse d'aimant.
EP85106486A 1984-06-13 1985-05-25 Dispositif d'extinction d'arc Expired - Lifetime EP0164632B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3421876 1984-06-13
DE19843421876 DE3421876A1 (de) 1984-06-13 1984-06-13 Lichtbogenloescheinrichtung

Publications (3)

Publication Number Publication Date
EP0164632A2 EP0164632A2 (fr) 1985-12-18
EP0164632A3 EP0164632A3 (en) 1988-03-30
EP0164632B1 true EP0164632B1 (fr) 1991-07-17

Family

ID=6238227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106486A Expired - Lifetime EP0164632B1 (fr) 1984-06-13 1985-05-25 Dispositif d'extinction d'arc

Country Status (3)

Country Link
EP (1) EP0164632B1 (fr)
DE (2) DE3421876A1 (fr)
NZ (1) NZ212409A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630447A1 (de) * 1986-09-06 1988-03-10 Bbc Brown Boveri & Cie Lichtbogenloescheinrichtung
DE29720715U1 (de) * 1997-11-21 1998-01-22 Siemens AG, 80333 München Schaltgerät mit Lichtbogen-Löscheinrichtung
DE19757332C1 (de) 1997-12-22 1999-07-22 Siemens Ag Lichtbogenlöscheinrichtung für ein Schaltgerät

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611058A (en) * 1950-08-12 1952-09-16 Westinghouse Electric Corp Circuit interrupter
BE546847A (fr) * 1955-04-07
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
US3243559A (en) * 1963-07-01 1966-03-29 Gen Electric Electric switch with novel arc cooling means
DE1965270U (de) * 1967-02-01 1967-08-03 Schrack Elek Zitaets A G E Loeschkammer.
DE1690463B1 (de) * 1968-02-03 1971-10-07 Elektro App Werke Berlin Trept Lichtbogenloescheinrichtung fuer elektrische niederspannungs leistungsschalter
US3641293A (en) * 1970-01-08 1972-02-08 Allis Chalmers Mfg Co Arc chute plates for air curcuit breaker
CH543174A (de) * 1971-09-30 1973-10-15 Carl Maier & Cie Elek Sche Sch Leitungsschutzschalter
DE2419656B2 (de) * 1974-04-24 1978-03-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Löschblechstapel, insbesondere für Leitungsschutzschalter, der auf einen Isolierstoffträger aufgeheftet ist
DE2923234C2 (de) * 1979-06-08 1987-03-12 Brown, Boveri & Cie Ag, 6800 Mannheim Für Niederspannungsschaltanlagen bestimmter Leistungsschalter oder Schutzschalter

Also Published As

Publication number Publication date
NZ212409A (en) 1988-05-30
DE3421876A1 (de) 1985-12-19
EP0164632A2 (fr) 1985-12-18
EP0164632A3 (en) 1988-03-30
DE3583459D1 (de) 1991-08-22

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