EP0382325B1 - Chambre d'extinction d'arc avec plaques d'extinction - Google Patents

Chambre d'extinction d'arc avec plaques d'extinction Download PDF

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Publication number
EP0382325B1
EP0382325B1 EP90250027A EP90250027A EP0382325B1 EP 0382325 B1 EP0382325 B1 EP 0382325B1 EP 90250027 A EP90250027 A EP 90250027A EP 90250027 A EP90250027 A EP 90250027A EP 0382325 B1 EP0382325 B1 EP 0382325B1
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EP
European Patent Office
Prior art keywords
incisions
arc
quenching chamber
splitters
chamber according
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
EP90250027A
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German (de)
English (en)
Other versions
EP0382325A1 (fr
Inventor
Michael Hahn
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0382325A1 publication Critical patent/EP0382325A1/fr
Application granted granted Critical
Publication of EP0382325B1 publication Critical patent/EP0382325B1/fr
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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 quenching chamber for an electrical switch with quenching plates which are arranged transversely to the longitudinal extent of a switching arc and have at least two incisions arranged next to one another.
  • An arc quenching chamber of this type is known for example from DE-A-31 31 437.
  • quenching plates are used, each of which has an incision on its side facing the switching contacts and optionally one, two or more incisions on its side facing away from the switching contacts.
  • an incision can be arranged asymmetrically on the side facing away from the switching contacts in order to form a meandering channel through the twisted assembly of successive quenching plates.
  • Arc quenching chambers equipped with quenching plates are basically suitable for use in circuit breakers for alternating current as well as for direct current.
  • the invention is based on the object of creating a quenching chamber which is particularly suitable for DC high-speed switches and which is also suitable for the voltage range above 1000 V, which also has a high current limitation and is distinguished by only a small gas ejection in compact dimensions .
  • An advantageous way of realizing the offset arrangement of the incisions can be that the incisions are arranged asymmetrically over the width of the quenching plates and successive quenching plates are mounted rotated by 180 ° relative to one another.
  • quenching plates with a symmetrical arrangement of the quenching plates, in which case successive quenching plates are then mounted laterally offset.
  • the invention can preferably be carried out with relatively acute-angled incisions, the angle of inclination of the flanks of the incisions relative to one another being less than or equal to 30 °.
  • quenching plates are used with incisions arranged symmetrically over the width
  • insulating plates with grooves can be provided for holding the quenching plates, which successively have a smaller and a greater depth corresponding to the desired offset of the incisions of successive quenching plates and that each have a groove of lesser depth Isolierstoffplatte a groove of greater depth is assigned to the opposite Isolierstoffplatte and vice versa.
  • This arrangement allows the quenching plates to be installed by simply plugging them in.
  • the incisions have the smallest possible radius of curvature at their tip. This should not exceed 1 mm. Such small and even less than 0.5 mm rounding radii can be achieved if the incisions be produced with the help of laser beam cutting.
  • FIG. 1 schematically shows a DC high-speed switch with an arc quenching chamber shown cut away.
  • the arc quenching chamber according to FIG. 1 is shown in FIG. 2 from above.
  • FIG. 3 shows two extinguishing plates arranged one behind the other in an enlarged view compared to FIGS. 1, 2 and 3.
  • FIG. 4 shows another exemplary embodiment of an arc quenching chamber in a direction of view of the edges of the quenching plates facing away from the switch contacts.
  • the DC high-speed switch 1 shown in FIG. 1 has a fixed switching contact 2 and a movable switching contact 3 interacting with it in a known manner. Both switch contacts 2 and 3 protrude into an arc quenching chamber 4, which has arc guideways 5 and 6 and quenching plates 7.
  • a drive device 8 of a suitable type is also shown schematically in connection with the movable switching contact 3.
  • the arc quenching chamber 4 has a housing 10 of approximately rectangular cross-sectional shape. In a known manner, the housing 10 can be made in one piece from an insulating material or from several parts.
  • the quenching plates 7 can be arranged parallel to one another, as shown in FIG. 1, and, as is known per se, can be arranged with their lower edges facing the switching contacts 2 and 3 along an arc whose center is on the side of the extinguishing plates 7 facing the switching contacts 2 and 3. Deviating from this, the quenching plates can also be aligned radially or can be arranged with different angular positions between adjacent quenching plates.
  • the extinguishing sheets 7 made of magnetizable sheet have the shape shown in FIG. 3.
  • Each quenching plate has on its side facing the switching contacts 2 and 3 four V-shaped cuts of the same size and arranged next to one another, the flanks of which are at an angle C of approximately 12.5 °. Between adjacent notches 15 there is the same distance D. However, the group of four notches 15 is arranged asymmetrically with respect to the width of the extinguishing plate 7, such that a smaller distance A and between the left notch 15 and the edge of the extinguishing plate 7 the right of the incisions 15 and the following edge of the quenching plate 7 there is a larger distance B.
  • the quenching plates 7 are each mounted alternately rotated by 180 °, so that, due to the asymmetrical arrangement of the incisions in each of the quenching plates, an overlap of the incisions of successive quenching plates appears in the projection.
  • the cuts of such an extinguishing plate 7 'rotated through 180 ° are shown at 15' in FIG.
  • the incisions are arranged asymmetrically such that there is an overlap of the incisions 15 and 15 'of approximately 1/3 of the mouth width of the incisions 15, which is denoted by W. Due to this measure, two further incisions appear in the projection, which are denoted by 17 and 18. These reach about 1/3 or 2/3 of the depth of the incisions 15.
  • the greatest possible depth of the incisions is obtained if one is as small as possible Rounding radius at the foot of the incisions is available.
  • a small radius of curvature of preferably less than 1 mm can be achieved in particular with a small flank angle C by the production with the aid of laser beam cutting.
  • pins 20 are shown in the figure, with the aid of which the quenching plates 7 can be positioned and held in the walls of the housing 10 (FIG. 2) of the arc quenching chamber 4.
  • FIG. 4 Another example of an arc quenching chamber is shown in FIG. 4, specifically with a view to the edges of the quenching plates, which face away from the switch contacts of a circuit breaker.
  • quenching plates 25 are used, the incisions of which are arranged symmetrically over the width of quenching plates 25.
  • the mutual offset of the incisions of successive quenching plates by part of the mouth width of the incisions is achieved in that the quenching plates 25 are held between insulating plates 21 and 22, which are provided with grooves 23 and 24 of different depths.
  • extinguishing sheets made of a magnetizable material, for example a soft magnetic steel sheet, are used.
  • a magnetizable material for example a soft magnetic steel sheet
  • B. thickness of the sheets chemical and physical nature of the surface and composition of the material can also be used within the scope of the invention.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (10)

  1. Chambre d'extinction d'arc électrique (4) pour un interrupteur électrique (1) comportant des tôles d'extinction (7;25) qui sont disposées transversalement par rapport à la direction longitudinale d'un arc électrique de coupure et possèdent au moins deux encoches (15) disposées côte-à-côte, caractérisée par le fait que les encoches (15,15') des tôles d'extinction successives (7,7'; 25,25') sont décalées l'une par rapport à l'autre d'une distance égale à une partie de la largeur (W) de leur ouverture de telle sorte que les flancs des encoches (15,15') forment plusieurs points d'intersection apparents, et que les encoches (15,15') sont disposées en étant tournées vers les contacts de coupure.
  2. Chambre d'extinction d'arc suivant la revendication 1, caractérisée par le fait que les encoches (15) sont disposées d'une manière dissymétrique sur la largeur de la tôle d'extinction (7) et que les tôles d'extinction successives (7,7') sont montées en étant pivotées réciproquement de 180°.
  3. Chambre d'extinction d'arc suivant la revendication 1, caractérisée par le fait que dans le cas d'une disposition symétrique des encoches sur la largeur de la tôle d'extinction (25), les tôles d'extinction successives (25,25') sont montées en étant décalées latéralement.
  4. Chambre d'extinction d'arc suivant l'une des revendications précédentes, caractérisée par le fait que dans le cas de trois ou d'un plus grand nombre d'encoches (15), la distance réciproque (D) est la même.
  5. Chambre d'extinction d'arc suivant l'une des revendications précédentes, caractérisée par le fait que le décalage réciproque des encoches (15,15') de tôles d'extinction successives (7,7'; 25,25') est égal approximativement à 1/3 la largeur de l'ouverture (W) des encoches (15).
  6. Chambre d'extinction d'arc suivant l'une des revendications précédentes, caractérisée en ce que l'angle (C) des encoches (15) est inférieur ou égal à 30°.
  7. Chambre d'extinction d'arc suivant la revendication 6, caractérisée par le fait que l'angle (C) des encoches (15) est compris entre 10 et 15°.
  8. Chambre d'extinction d'arc suivant l'une des revendications précédentes, caractérisée par le fait que les tôles d'extinction (7) possèdent des tétons (20) qui font saillie latéralement et sont destinés à s'engager dans des évidements du boîtier (10) de la chambre d'extinction d'arc (4).
  9. Chambre d'extinction d'arc suivant la revendication 5, caractérisée par le fait que pour le maintien des tôles d'extinction (25), il est prévu des plaques en matériau isolant (21,22) comportant des rainures (23,24), qui possèdent successivement une profondeur inférieure et une profondeur supérieure en fonction du décalage désiré des encoches de tôles d'extinction successives (25,25'), et que respectivement une rainure (24) de faible profondeur d'une plaque en matériau isolant (21) est associée à une rainure (23) de forte profondeur de la plaque en matériau isolant opposée (22) et inversement.
  10. Chambre d'extinction d'arc suivant l'une des revendications précédentes, caractérisée par le fait que les encoches (15) des tôles d'extinction (16) possèdent, au niveau de leurs pointes, un rayon de courbure égal au maximum à 1 mm.
EP90250027A 1989-02-08 1990-02-01 Chambre d'extinction d'arc avec plaques d'extinction Expired - Lifetime EP0382325B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3904268 1989-02-08
DE3904268 1989-02-08
DE3912726A DE3912726A1 (de) 1989-02-08 1989-04-14 Lichtbogenloeschkammer mit loeschblechen
DE3912726 1989-04-14

Publications (2)

Publication Number Publication Date
EP0382325A1 EP0382325A1 (fr) 1990-08-16
EP0382325B1 true EP0382325B1 (fr) 1994-01-12

Family

ID=25877743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250027A Expired - Lifetime EP0382325B1 (fr) 1989-02-08 1990-02-01 Chambre d'extinction d'arc avec plaques d'extinction

Country Status (2)

Country Link
EP (1) EP0382325B1 (fr)
DE (2) DE3912726A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19735522C1 (de) * 1997-08-16 1999-01-28 Kloeckner Moeller Gmbh Halterung für Löschbleche einer Lichtbogenlöscheinrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4409495A1 (de) * 1994-03-19 1995-09-21 Sachsenwerk Ag Lichtbogenlöscheinrichtung mit Löschblechen
DE19854108C1 (de) * 1998-11-24 2000-07-13 Elbag Ag Vorrichtung zur Löschung eines Lichtbogens
DE102004022194B4 (de) * 2004-05-05 2013-01-03 Abb Ag Lichtbogenlöscheinrichtung für einen Leitungsschutzschalter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL156497C (fr) * 1949-10-29
DE1210472B (de) * 1962-11-22 1966-02-10 Licentia Gmbh Lichtbogenloeschkammer
DE1926355B1 (de) * 1969-05-23 1970-11-12 Siemens Ag Lichtbogenl¦schkammer für Niederspannungsleistungsschalter
US3749867A (en) * 1971-04-01 1973-07-31 Westinghouse Electric Corp Spaced-metallic-plate-type of arc-chute for a switch
CH594976A5 (fr) * 1976-05-07 1978-01-31 Bbc Brown Boveri & Cie
DE3129161A1 (de) * 1981-07-23 1983-02-10 Siemens AG, 1000 Berlin und 8000 München "lichtbogen-loeschkammer
DE3131437A1 (de) * 1981-08-07 1983-02-24 Siemens AG, 1000 Berlin und 8000 München "elektrischer schalter"
FR2569304B1 (fr) * 1984-08-15 1990-12-28 Mitsubishi Electric Corp Interrupteur de circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19735522C1 (de) * 1997-08-16 1999-01-28 Kloeckner Moeller Gmbh Halterung für Löschbleche einer Lichtbogenlöscheinrichtung

Also Published As

Publication number Publication date
DE59004164D1 (de) 1994-02-24
EP0382325A1 (fr) 1990-08-16
DE3912726A1 (de) 1990-08-09

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