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EP0624889B1 - Commutateur électrique - Google Patents

Commutateur électrique Download PDF

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Publication number
EP0624889B1
EP0624889B1 EP94106939A EP94106939A EP0624889B1 EP 0624889 B1 EP0624889 B1 EP 0624889B1 EP 94106939 A EP94106939 A EP 94106939A EP 94106939 A EP94106939 A EP 94106939A EP 0624889 B1 EP0624889 B1 EP 0624889B1
Authority
EP
European Patent Office
Prior art keywords
arc
antechamber
guide rail
connecting conductor
space
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
EP94106939A
Other languages
German (de)
English (en)
Other versions
EP0624889A1 (fr
Inventor
Klaus Eppe
Peter Huber
Richard Kommert
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0624889A1 publication Critical patent/EP0624889A1/fr
Application granted granted Critical
Publication of EP0624889B1 publication Critical patent/EP0624889B1/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
    • H01H9/46—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
    • 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

  • a normal circuit breaker has a contact point which is formed from a fixed and a movable contact piece, the latter being attached to a rotatable contact lever.
  • the contact point is located in a so-called pre-chamber space, which is followed by an arc quenching plate package, to which the base points of the arc are guided by the fixed contact piece and the movable contact piece via arc guide rails.
  • prechamber plates are arranged which consist of insulating material and which contribute to the fact that the arc is conducted into the quenching chamber, ie into the arc quenching plate packet.
  • the arc widens immediately after the contact opening and the speed at which the arc enters the arc quenching plate package is dependent on what is known as self-blowing, ie by the magnetic blowing field generated by the arc, by the dynamics and the pressure conditions on the arc.
  • the shape of the guide rails naturally also has an influence.
  • the arc running speed is determined by the mechanical process of unlatching the switch, as mentioned, the geometric arrangement of the guide rails and also by the choice of the contact material.
  • An electrical switch of the type mentioned is known from US 4,387,281. It describes an electrical switch which has a contact point provided with a fixed contact piece and a movable contact piece arranged on a pivotable contact lever; a first arc guide rail connects to the fixed contact piece; the movable contact piece is assigned a second arc guide rail in its switched-off position; at their free ends, the arc guide rails take an arc quenching plate packet between them. Seen on the movable contact piece in the arc running direction in front of the contact piece, a connecting conductor connects, which runs partially parallel to the second arc guide rail and outside the prechamber plates and then transversely to the arc quenching plates to a connecting terminal.
  • the object of the invention is to provide a switch in which the arc running into the quenching chamber is further improved.
  • one of the two prechamber plates not only serves to steer the arc in a certain direction and to increase the speed of the arc, but also to ensure that the connecting conductor between the fixed contact piece and the connecting terminal can run partially parallel to the other arc guide rail, the parallel section of the connecting conductor and the other arc runner is isolated by the prechamber plate. Due to this assignment of the connecting conductor to the arc guide rail and to the prechamber space, an electromagnetic field is generated in the event of a short-circuit current, which serves as a blow loop and accelerates the arc to the arc-quenching plate package. This blow loop practically forces the arc in the direction of the arc quenching plate package and drives it into the quenching chamber at high speed.
  • a particularly advantageous embodiment of the invention can be that one of the two prechamber plates is formed from gas-emitting material. While in the arrangement according to US 4,387,281 part of the connecting conductor is arranged in front of the contact point, in the present invention the connecting conductor runs laterally to the contact point and thus in the area in which the arc runs before it is led into the arc quenching chamber. This gives the arc an additional acceleration in the arc quenching chamber.
  • the electrical switch of which FIG. 1 only shows a region comprising the contact point, has a pivotable contact lever 10, the end 11 of which on the right in the drawing has a movable contact piece 12 which is only visible in FIG. 3.
  • This contact piece 12 interacts with a fixed contact piece 13 (see FIG. 3) which is fastened on the side of a contact carrier web 14 which is not visible in FIG.
  • a flag 15 in the plane of the contact lever movement which serves as the first arc guide plate or rail and ends in a widened section 16 which is the size of an unspecified one Arc Extinguishing Sheet Package corresponds.
  • a second arc guide rail 25 which has a curved region 26 which runs parallel to the section 22 and which ends in a widened plate 27 which is aligned exactly parallel to the section 16. Between the plate 27 and the section 16, the above-mentioned arc quenching plate package is then inserted.
  • the one arc base point runs from the web 14 towards the section 15, whereas the other arc base point commutates from the movable contact piece 12 onto the arc guide rail 25 and via the curved section 26 to the plate 27 and thus the Arc enters the arc quenching plate package.
  • FIG. 1 Below the arrangement shown in FIG. 1 there is a first prechamber plate 27a and above the arc guide rail 25, above the movable contact lever 16 and the contact point 12/13, but below the connecting conductor 18 or the intermediate piece 17a running perpendicular to the sections 18 and 21 there is a second prechamber plate 28 which, at the edge which runs approximately parallel to the arc guide rail 25, has a wall 29 which is arranged perpendicular to the prechamber plate 28 and which projects beyond the prechamber plate 28 in the direction of the arc guide rail or in the direction of the plate 27.
  • the wall 29, which is cross-hatched in FIG. 3 is located outside the arc guide rail 25 and within the partial area piece 22, that is, between these two and isolates the partial area 22 from the arc guide rail 25.
  • FIG. 3 shows the course of the connecting conductor 18 and the section 17a, which is shown in dashed lines since it lies above the plane of the drawing.
  • a current flowing in the event of a short circuit then runs in the direction of arrow I from the flag 23 over the partial area 22, the connecting conductor 18 with the partial piece 17a into the arc guide rail 15, over the arc 30 to the arc guide rail 26 and there in the same direction as in the partial area 22 to the coil of an electromagnetic release, which is not shown in Figure 3.
  • the special arrangement of the two regions 26 and 22, which run in parallel, and the partial region 17a provide a driving force for the arc towards the arc-quenching plate stack in the direction of the arrow P (see FIG. 3).

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (3)

  1. Interrupteur électrique comprenant un contact (12, 13) disposé dans un espace de préchambre, et comprenant une pièce de contact (13) fixe et une pièce de contact (12) mobile, coopérant avec la pièce fixe et disposée sur un levier de contact (10) pivotant, un premier rail de guidage d'arc (16) se raccordant à la pièce de contact (13) fixe et un deuxième rail de guidage d'arc (27) sur lequel passe l'un des pieds d'un arc électrique (30) produit lors d'une opération de coupure, lesquels rails de guidage (16, 27) reçoivent, entre leurs extrémités, une chambre d'extinction d'arc, par exemple un paquet de tôles d'extinction d'arc, des plaques de chambre (27a) disposées de part et d'autre de l'espace de préchambre et délimitant cet espace de part et d'autre, et un conducteur de liaison (18, 17a, 22) s'étendant entre la pièce de contact (13) fixe et l'une des bornes de raccordement partiellement parallèlement au deuxième rail de guidage d'arc, caractérisé par le fait que le conducteur de liaison (18, 17a, 22) recouvre l'espace de préchambre et que l'une des plaques de chambre (28) disposée entre le conducteur de liaison (18) et l'espace de préchambre, comporte un prolongement de paroi (29) s'étendant perpendiculairement à elle et disposé entre le deuxième rail de guidage d'arc (27) et une partie du conducteur de liaison (18, 17a, 22) s'étendant parallèlement audit rail.
  2. Interrupteur suivant la revendication 1, caractérisé par le fait que l'une des deux plaques de préchambre, de préférence celle comportant le prolongement de paroi (29), est constituée par un matériau isolant générateur de gaz.
  3. Interrupteur suivant la revendication 2, caractérisé par le fait que la plaque de préchambre (28) présente sur son côté éloigné de la préchambre des rainures pour recevoir le conducteur de liaison (18) à l'extérieur de la préchambre.
EP94106939A 1993-05-10 1994-05-04 Commutateur électrique Expired - Lifetime EP0624889B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4315485A DE4315485A1 (de) 1993-05-10 1993-05-10 Elektrischer Schalter
DE4315485 1993-05-10

Publications (2)

Publication Number Publication Date
EP0624889A1 EP0624889A1 (fr) 1994-11-17
EP0624889B1 true EP0624889B1 (fr) 1997-07-30

Family

ID=6487669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94106939A Expired - Lifetime EP0624889B1 (fr) 1993-05-10 1994-05-04 Commutateur électrique

Country Status (3)

Country Link
EP (1) EP0624889B1 (fr)
DE (2) DE4315485A1 (fr)
ES (1) ES2107704T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19524915C2 (de) * 1995-07-08 2003-06-26 Abb Patent Gmbh Lichtbogenlöschanordnung für einen elektrischen Schalter, insbesondere für einen Leitungsschutzschalter
AT411408B (de) * 1999-09-02 2003-12-29 Felten & Guilleaume Ag Oester Mehrpoliges schaltgerät
DE102009023556B4 (de) 2009-05-30 2012-01-19 Abb Ag Elektrisches Schaltgerät mit einem thermischen Auslöser

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066259B (fr) * 1959-10-01
BE556013A (fr) * 1956-03-22
CH351006A (de) * 1957-03-25 1960-12-31 Bbc Brown Boveri & Cie Schalter mit magnetischer Blasung
DE1053067B (de) * 1958-06-26 1959-03-19 Siemens Ag Elektrischer Leistungsschalter mit Loeschkammer
DE1665684A1 (de) * 1966-07-21 1971-03-25 Siemens Ag Elektrischer Schalter,insbesondere Leitungsschutzschalter
DE2609708C2 (de) * 1976-03-09 1980-10-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen Leitungsschutzschalter mit Lichtbogenanlaufhilfe
FR2422242A1 (fr) * 1978-04-07 1979-11-02 Telemecanique Electrique Chambre de soufflage pour appareil electrique limiteur de courant
DE2841004C2 (de) * 1978-09-21 1980-10-02 Licentia Gmbh Leitungsschutzschalter mit zusätzlicher Blasschleife
US4387281A (en) * 1979-04-06 1983-06-07 La Telemecanique Electrique Arc blowing chamber
FR2549638B1 (fr) * 1983-07-18 1988-11-18 Etude Realisa Disjoncteurs Sa Disjoncteur avec dispositif d'acceleration de deplacement d'arc
DE3443121A1 (de) * 1984-11-27 1986-05-28 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer leitungsschutzschalter
US4654614A (en) * 1985-03-04 1987-03-31 Westinghouse Electric Corp. Current limiting solenoid operated circuit breaker
DE3625425A1 (de) * 1986-07-28 1988-02-04 Bbc Brown Boveri & Cie Leitungsschutzschalter
IT208624Z2 (it) * 1986-12-11 1988-05-28 Sace Spa Camera d'arco, in particolare per interruttori di bassa tensione.!

Also Published As

Publication number Publication date
DE59403513D1 (de) 1997-09-04
EP0624889A1 (fr) 1994-11-17
ES2107704T3 (es) 1997-12-01
DE4315485A1 (de) 1994-11-17

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