EP0614208A2 - Arc quenching device in particular for an automatic cut-out or contactors - Google Patents

Arc quenching device in particular for an automatic cut-out or contactors Download PDF

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Publication number
EP0614208A2
EP0614208A2 EP94102534A EP94102534A EP0614208A2 EP 0614208 A2 EP0614208 A2 EP 0614208A2 EP 94102534 A EP94102534 A EP 94102534A EP 94102534 A EP94102534 A EP 94102534A EP 0614208 A2 EP0614208 A2 EP 0614208A2
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EP
European Patent Office
Prior art keywords
arc
contact
quenching
contact lever
lever
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Granted
Application number
EP94102534A
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German (de)
French (fr)
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EP0614208A3 (en
EP0614208B1 (en
Inventor
Klaus-Peter Eppe
Peter Huber
Richard Kommert
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ABB Patent GmbH
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ABB Patent GmbH
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Publication of EP0614208A3 publication Critical patent/EP0614208A3/en
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    • 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
    • H01H9/346—Details concerning the arc formation chamber

Definitions

  • the invention relates to an arc extinguishing arrangement for an electrical switching device, in particular for a circuit breaker and contactor according to the preamble of claim 1.
  • Arc extinguishing arrangements have become known, in particular in the case of circuit breakers, in which an arc drawn between a movable and a fixed contact piece is extinguished when the circuit is switched off.
  • the contact pieces are each assigned an arc guide rail, to which the respective base points of the arc arrive and which guide the arc into an arc-quenching plate packet in which the arc is extinguished.
  • the space in front of the arc quenching plate package, which is referred to as the prechamber, is covered on both sides with plates made of insulating material to direct the arc.
  • the movement of the arc is caused by the assignment of the contact pieces and the current paths to one another, through which an electric field is generated, which drives the arc into the arc chamber; the dynamics and the pressure conditions generated by the arc as well as the shape of the guide rails and the assignment of the prechamber to the arc extinguishing plates are also important.
  • suction plates can also be used to accelerate the arc in the direction of the arc quenching plate package.
  • the object of the invention is to provide an arc extinguishing arrangement of the type mentioned in the introduction, in which the movement of the arc into the arc extinguishing sheet packet is accelerated even further, particularly at the start of the switching operation.
  • the barrier web which is located in front of the arc extinguishing arrangement, acts like a type of pressure repulsion web, with which the arc is steered out of the contact point at a very high speed in the direction of the arc extinguishing sheet package. Due to the barrier, the arc running speed is significantly increased, which also this is due to the fact that the gases generated by the arc cannot flow out to the front, i.e. against the direction of travel.
  • the locking plate or the locking web is preferably oriented such that it extends approximately perpendicular to the contact lever when it is in the switched-on position.
  • the arc extinguishing arrangement according to FIG. 1 has a pivotable contact lever 10, at the free end of which a movable contact piece 11 is fastened, whereas the other free end is rotatably supported on an axis (not shown in detail), so that the contact lever is turned counterclockwise during a switching operation ( pivoted in the drawing).
  • the movable contact interacts with a fixed contact 12 which is fastened to a power supply path 13 which is bent in a U-shape, forming one leg, whereas the other leg 14 runs parallel to arc-extinguishing plates 15.
  • the section that forms the base of the U-shape and connects the two legs 13 and 14 to one another, serves together with the leg 14 as an arc guide rail.
  • a leg 18 of a second arc guide rail which is bent in an L-shape and the other leg 19 of which runs parallel to the leg 14 and parallel to the arc-extinguishing plates 15, so that the arc-extinguishing plates 15 are received between the two legs 14 and 19 are.
  • the leg 17 of the arc guide rail 18 has a cutout 20 in which the contact lever 10 extends through the leg 17 and in which it can also be moved.
  • FIG. 2 shows a variant of the embodiment according to FIG. 1.
  • the locking plate 21 and the contact lever 10 with the movable contact piece 11 can be seen.
  • the stationary, fixed contact 12 is fastened to a current-conducting guide rail 25, which forms a first leg 26, which together with a second leg 27, which extends perpendicular to the first leg 26, forms an L-shape.
  • the arc quenching plates 15 are located parallel to the second leg 27 and a straight arc guiding rail 28 runs parallel to the arc quenching plates and runs approximately perpendicular to the contact lever 10 and parallel to the locking plate 21.
  • the contact lever 10 passes through the guide rail 28 in the same way as the contact lever 10 the leg 17.
  • the recess 20 is also present here, but not shown for reasons of simplification.
  • FIG. 3 shows a further embodiment in which the arc extinguishing plates 15 again run parallel to the contact lever 10, although the contact lever in the switched-on position limits the arc extinguishing plates 15 on one side.
  • the movable contact piece 11 interacts with the fixed contact piece 12, which is fastened to a power supply rail 30 which forms a leg 32 of a Z-shaped arc guide rail 31.
  • the other leg 33 is connected to the leg 32 via a connecting web 34 connected to the leg 32 and extending at an obtuse angle alpha.
  • the arc running direction is also Z-shaped.
  • a contact carrier rail 40 is arranged parallel to the contact lever 10 with the movable contact piece 11, to which the fixed contact piece 12 is fastened.
  • the rail 40 is removed from the contact lever by the thickness of the two contact pieces 11 and 12, and there are no arc-quenching plates between the contact lever and the rail 40.
  • the locking plate 21 is located in front of the contact pieces 11 and 12 in the same way as in the other embodiments.
  • the one arc base point runs from the fixed contact piece on the arc guide rail 13, 16, 14; 26, 27; 31, 32, 33; 40 towards an extinguishing device, whereas the other base point first runs on the contact lever 10 before it commutates on the guide rail 18 or 28 in the embodiments according to FIGS. 1 and 2.
  • the base point remains on the contact lever 10 and arrives with the contact lever 10 as an arc guide rail to the quenching plates 15 (FIG. 3) or to another quenching device which is not shown in FIG. 4.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Arc Welding In General (AREA)

Abstract

An (electric) arc quenching device for an electrical switch, especially for an automatic cut-out (circuit-breaker) and contactor consists of one movable and one fixed contact piece (11, 12) which are arranged in a quenching chamber space (22). During a switching operation, an arc is produced at the contact location, the base points of which arc commutate from the contact pieces (11, 12) to arc conduction rails (13, 14, 16; 18) which feed the arc to a quenching device (15). In order to accelerate the movement of the arc, a locking plate (21) is provided in front of the contact location (11, 12), seen in the arc running direction (P), which locking plate frontally seals the quenching chamber space (22) in the region in front of the contact location (11, 12), so that gas flow in this region in front of the contact location (11, 12) is prevented. <IMAGE>

Description

Die Erfindung betrifft eine Lichtbogenlöschanordnung für ein elektrisches Schaltgerät, insbesondere für einen Leitungsschutzschalter und Schütze gemäß dem Oberbegriff des Anspruches 1.The invention relates to an arc extinguishing arrangement for an electrical switching device, in particular for a circuit breaker and contactor according to the preamble of claim 1.

Es sind Lichtbogenlöschanordnungen insbesondere bei Leitungsschutzschaltern bekannt geworden, in denen ein zwischen einem bewegbaren und einem feststehenden Kontaktstück bei einer Ausschaltung gezogener Lichtbogen gelöscht wird. Dabei ist den Kontaktstücken jeweils eine Lichtbogenleitschiene zugeordnet, auf die die jeweiligen Fußpunkte des Lichtbogens gelangen und die den Lichtbogen in ein Lichtbogenlöschblechpaket führen, in welchem der Lichtbogen gelöscht wird. Der Raum vor dem Lichtbogenlöschblechpaket, der als Vorkammer bezeichnet ist, ist zur Lenkung des Lichtbogens beidseitig mit Platten aus Isolierstoff abgedeckt. Die Bewegung des Lichtbogens wird bewirkt durch die Zuordnung der Kontaktstücke sowie der Strompfade zueinander, durch die ein elektrisches Feld erzeugt wird, welches den Lichtbogen in die Lichtbogenkammer treibt; von Bedeutung sind weiterhin die Dynamik und die durch den Lichtbogen erzeugten Druckverhältnisse sowie die Formgebung der Leitschienen und die Zuordnung der Vorkammer zu den Lichtbogenlöschblechen. Bei bestimmten Leitungsschutzschaltern können auch Saugbleche verwendet werden, mit denen der Lichtbogen in Richtung Lichtbogenlöschblechpaket beschleunigt wird. Diese gesamten Parameter bestimmen die Löschwirkung des Schaltgerätes.Arc extinguishing arrangements have become known, in particular in the case of circuit breakers, in which an arc drawn between a movable and a fixed contact piece is extinguished when the circuit is switched off. In this case, the contact pieces are each assigned an arc guide rail, to which the respective base points of the arc arrive and which guide the arc into an arc-quenching plate packet in which the arc is extinguished. The space in front of the arc quenching plate package, which is referred to as the prechamber, is covered on both sides with plates made of insulating material to direct the arc. The movement of the arc is caused by the assignment of the contact pieces and the current paths to one another, through which an electric field is generated, which drives the arc into the arc chamber; the dynamics and the pressure conditions generated by the arc as well as the shape of the guide rails and the assignment of the prechamber to the arc extinguishing plates are also important. With certain circuit breakers, suction plates can also be used to accelerate the arc in the direction of the arc quenching plate package. These entire parameters determine the extinguishing effect of the switching device.

Aus der DE 28 16 352 C2 ist ein elektrisches Schaltgerät bekannt geworden, bei dem vor der Kontaktstelle eine Platte angeordnet ist, die ein Zurückströmen der Lichtbogenlöschgase in den Bereich vor die Kontaktstelle, also in den Bereich des Schaltschlosses verhindern soll. Dadurch, daß der Kontakthebel durch die Sperrplatte hindurchgreift, ist ein Schlitz gebildet, durch den die Lichtbogenlöschgase gleichwohl nach vorne austreten können.From DE 28 16 352 C2 an electrical switching device has become known in which a plate is arranged in front of the contact point and is intended to prevent the arc-quenching gases from flowing back into the area in front of the contact point, that is to say into the area of the switch lock. Characterized in that the contact lever extends through the locking plate, a slot is formed through which the arc quenching gases can nevertheless emerge to the front.

Aufgabe der Erfindung ist es, eine Lichtbogenlöschanordnung der eingangs genannten Art zu schaffen, bei der die Bewegung des Lichtbogens in das Lichtbogenlöschblechpaket insbesondere zu Beginn der Schalthandlung noch weiter beschleunigt wird.The object of the invention is to provide an arc extinguishing arrangement of the type mentioned in the introduction, in which the movement of the arc into the arc extinguishing sheet packet is accelerated even further, particularly at the start of the switching operation.

Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Anspruches 1.This object is achieved according to the invention by the characterizing features of claim 1.

Der Sperrsteg, der sich vor der Lichtbogenlöschanordnung befindet, wirkt wie eine Art Druckabstoßsteg, mit dem der Lichtbogen mit sehr hoher Geschwindigkeit aus der Kontaktstelle heraus in die Richtung zum Lichtbogenlöschblechpaket gelenkt wird. Durch den Sperrsteg wird die Lichtbogenlaufgeschwindigkeit deutlich erhöht, was auch darauf zurückzuführen ist, daß die durch den Lichtbogen entstehende Gase nicht nach vorne, also entgegen der Laufrichtung abströmen können.The barrier web, which is located in front of the arc extinguishing arrangement, acts like a type of pressure repulsion web, with which the arc is steered out of the contact point at a very high speed in the direction of the arc extinguishing sheet package. Due to the barrier, the arc running speed is significantly increased, which also this is due to the fact that the gases generated by the arc cannot flow out to the front, i.e. against the direction of travel.

In bevorzugter Weise ist die Sperrplatte oder der Sperrsteg so ausgerichtet, daß er etwa senkrecht zum Kontakthebel verläuft, wenn sich dieser in Einschaltstellung befindet.The locking plate or the locking web is preferably oriented such that it extends approximately perpendicular to the contact lever when it is in the switched-on position.

Anhand der Zeichnung, in der einige Ausführungsbeispiele der Erfindung dargestellt sind, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung näher erläutert und beschrieben werden.The invention and further advantageous refinements and improvements of the invention are to be explained and described in more detail with reference to the drawing, in which some exemplary embodiments of the invention are shown.

Es zeigen:

Figuren 1 bis 4
je eine Ausgestaltung einer Lichtbogenlöschanordnung, in schematischer Darstellung und
Figur 5
eine Seitenansicht gemäß Pfeilrichtung V der Figur 1.
Show it:
Figures 1 to 4
one embodiment of an arc extinguishing arrangement, in a schematic representation and
Figure 5
2 shows a side view in the direction of arrow V in FIG. 1.

Die Lichtbogenlöschanordnung gemäß Figur 1 besitzt einen schwenkbaren Kontakthebel 10, an dessen freiem Ende ein bewegbares Kontaktstück 11 befestigt ist, wogegen das andere freie Ende an einer nicht näher dargestellten Achse drehbar aufgelagert ist, so daß der Kontakthebel bei einer Schalthandlung entgegen dem Uhrzeigersinn nach unten (in der Zeichnung) verschwenkt. Der bewegliche Kontakt wirkt mit einem feststehenden Kontakt 12 zusammen, der an einer Stromzuführungsbahn 13 befestigt ist, die U-förmig gebogen ist, wobei sie den einen Schenkel bildet, wogegen der andere Schenkel 14 parallel zu Lichtbogenlöschblechen 15 verläuft. Der Abschnitt, der den Grund der U-Form bildet und die beiden Schenkel 13 und 14 miteinander verbindet, dient dabei zusammen mit dem Schenkel 14 als Lichtbogenleitschiene.The arc extinguishing arrangement according to FIG. 1 has a pivotable contact lever 10, at the free end of which a movable contact piece 11 is fastened, whereas the other free end is rotatably supported on an axis (not shown in detail), so that the contact lever is turned counterclockwise during a switching operation ( pivoted in the drawing). The movable contact interacts with a fixed contact 12 which is fastened to a power supply path 13 which is bent in a U-shape, forming one leg, whereas the other leg 14 runs parallel to arc-extinguishing plates 15. The section that forms the base of the U-shape and connects the two legs 13 and 14 to one another, serves together with the leg 14 as an arc guide rail.

Senkrecht zu dem Kontakthebel 10 verläuft ein Schenkel 18 einer zweiten Lichtbogenleitschiene, die L-förmig gebogen ist und deren anderer Schenkel 19 Parallel zu dem Schenkel 14 und parallel zu den Lichtbogenlöschblechen 15 verläuft, so daß die Lichtbogenlöschbleche 15 zwischen den beiden Schenkein 14 und 19 aufgenommen sind.Perpendicular to the contact lever 10 is a leg 18 of a second arc guide rail which is bent in an L-shape and the other leg 19 of which runs parallel to the leg 14 and parallel to the arc-extinguishing plates 15, so that the arc-extinguishing plates 15 are received between the two legs 14 and 19 are.

Wie aus Figur 5 ersichtlich ist, besitzt der Schenkel 17 der Lichtbogenleitschiene 18 eine Aussparung 20, in der der Kontakthebel 10 den Schenkel 17 durchgreift und in der er auch bewegbar ist.As can be seen from FIG. 5, the leg 17 of the arc guide rail 18 has a cutout 20 in which the contact lever 10 extends through the leg 17 and in which it can also be moved.

Wenn zwischen den beiden Kontaktstücken 11 und 12 ein Lichtbogen entsteht, wird sich dieser Lichtbogen im wesentlichen in Pfeilrichtung P zu den Löschblechen 15 hin bewegen. Dabei läuft bei einer Ausschaltung der eine Fußpunkt des Lichtbogens entlang der Leitschiene 16, wogegen der andere Fußpunkt auf den Kontakthebel 10 kommutiert und von dort auf die Lichtbogenleitschiene 18. Dadurch bildet der Kontakthebel 10 einen Teil der Lichtbogenleitschiene, oder besser Lichtbogenleitschienenanordnung, die den am beweglichen Kontaktstück entstehenden Lichtbogenfußpunkt hin in das Lichtbogenlöschblechpaket treibt.If an arc arises between the two contact pieces 11 and 12, this arc will move essentially in the direction of arrow P towards the quenching plates 15. When the arc is switched off, one base point of the arc runs along the guide rail 16, whereas the other base point commutates on the contact lever 10 and from there onto the arc guide rail 18. As a result, the contact lever 10 forms part of the arc guide rail, or better, arc guide rail arrangement, which is the most movable Contact point arcing arises in the arc quenching plate package drives.

In Richtung der Bewegung des Lichtbogens gesehen, befindet sich vor den Kontaktstücken 11 und 12 eine Sperrplatte 21, die als Druckabstoßplatte dient und die verhindert, daß beim Ziehen des Lichtbogens entstehende Gase entgegen der Lichtbogenlaufrichtung P nach vorn abströmen können. Zwischen dem Schenkel 13, dem Kontakthebel 10 und der Sperrplatte 21 befindet sich unmittelbar nach der Öffnung der beiden Kontaktstücke 11 und 12 ein in Lichtbogenlaufrichtung P offener Raum, durch den die Gase abströmen und dadurch den Lichtbogen in die Lichtbogenlöschbleche treiben können. Dadurch wird eine erhebliche Beschleunigung in Richtung Lichtbogenlöschbleche 15 bewirkt.Seen in the direction of the movement of the arc, there is a blocking plate 21 in front of the contact pieces 11 and 12, which serves as a pressure-repelling plate and which prevents gases which arise when the arc is drawn from flowing out against the direction of the arc P to the front. Between the leg 13, the contact lever 10 and the locking plate 21, immediately after the opening of the two contact pieces 11 and 12, there is an open space in the arc running direction P through which the gases flow and thereby drive the arc into the arc quenching plates. This causes a considerable acceleration in the direction of the arc extinguishing plates 15.

Daß bei dieser Lichtbogenlöschanordnung noch weitere Maßnahmen, wie beispielsweise Vorkammerplatten vorgesehen sind, die den Raum 22 vor den Lichtbogenlöschblechen 15 seitlich abdecken, ist selbstverständlich. Von Bedeutung ist noch der zwischen dem Kontakthebel 10 und dem die Aussparung 20 seitlich begrenzenden Vorsprung 23 befindliche Spalt 24; dieser sollte gerade so groß gemacht werden, daß durch den Spalt 24 keine Gase abströmen können. Weiterhin soll der Spalt klein genug sein, um ein Kommutieren des Lichtbogens vom Kontakthebel 10 hin zum Schenkel 17 zu gewährleisten.It goes without saying that further measures, such as prechamber plates, are provided in this arc quenching arrangement, which laterally cover the space 22 in front of the arc quenching plates 15. Also of importance is the gap 24 between the contact lever 10 and the projection 23 which laterally delimits the recess 20; this should be made just large enough that no gases can flow out through the gap 24. Furthermore, the gap should be small enough to ensure commutation of the arc from the contact lever 10 to the leg 17.

Die Figur 2 zeigt eine Variante der Ausführung nach Figur 1. Man erkennt die Sperrplatte 21 und den Kontakthebel 10 mit dem beweglichen Kontaktstück 11. Der ortsfeste, feststehende Kontakt 12 ist an einer Stromführungsleitschiene 25 befestigt, die einen ersten Schenkel 26 bildet, der zusammen mit einem zweiten Schenkel 27, der senkrecht zum ersten Schenkel 26 verläuft, eine L-Form bildet. Parallel zum zweiten Schenkel 27 befinden sich die Lichtbogenlöschbleche 15 und parallel zu den Lichtbogenlöschblechen verläuft eine geradlinig ausgebildete Lichtbogenleitschiene 28, die etwa senkrecht zu dem Kontakthebel 10 und parallel zu der Sperrplatte 21 verläuft. Der Kontakthebel 10 durchgreift die Leitschiene 28 in der gleichen Weise wie der Kontakthebel 10 den Schenkel 17. Die Aussparung 20 ist hier ebenfalls vorhanden, nicht aber aus Vereinfachungsgründen dargestellt.FIG. 2 shows a variant of the embodiment according to FIG. 1. The locking plate 21 and the contact lever 10 with the movable contact piece 11 can be seen. The stationary, fixed contact 12 is fastened to a current-conducting guide rail 25, which forms a first leg 26, which together with a second leg 27, which extends perpendicular to the first leg 26, forms an L-shape. The arc quenching plates 15 are located parallel to the second leg 27 and a straight arc guiding rail 28 runs parallel to the arc quenching plates and runs approximately perpendicular to the contact lever 10 and parallel to the locking plate 21. The contact lever 10 passes through the guide rail 28 in the same way as the contact lever 10 the leg 17. The recess 20 is also present here, but not shown for reasons of simplification.

Während der Lichtbogen aufgrund der Ausführung nach Figur 1 einen Weg von etwa 180° zurücklegt, ist die Lichtbogenlaufrichtung lediglich um einen Winkel von 90° gekrümmt, ansonsten ist das Vorsehen der Sperrplatte 21 identisch wie bei der Ausführung nach Figur 1.While the arc travels a distance of approximately 180 ° due to the embodiment according to FIG. 1, the direction of the arc is only curved by an angle of 90 °, otherwise the provision of the locking plate 21 is identical to that of the embodiment according to FIG. 1.

Die Figur 3 zeigt eine weitere Ausführungsform, bei der die Lichtbogenlöschbleche 15 wieder parallel zum Kontakthebel 10 verlaufen, wobei allerdings der Kontakthebel in Einschaltstellung die Lichtbogenlöschbleche 15 auf einer Seite begrenzt. Das bewegbare Kontaktstück 11 wirkt mit dem feststehenden Kontaktstück 12 zusammen, das an einer Stromzuführungsschiene 30 befestigt ist, die einen Schenkel 32 einer Z-förmigen Lichtbogenleitschiene 31 bildet. Der andere Schenkel 33 ist über einen mit dem Schenkel 32 verbundenen, unter einem stumpfen Winkel alpha verlaufenden Verbindungssteg 34 mit diesem verbunden. Die Lichtbogenlaufrichtung ist dadurch ebenfalls Z-förmig.FIG. 3 shows a further embodiment in which the arc extinguishing plates 15 again run parallel to the contact lever 10, although the contact lever in the switched-on position limits the arc extinguishing plates 15 on one side. The movable contact piece 11 interacts with the fixed contact piece 12, which is fastened to a power supply rail 30 which forms a leg 32 of a Z-shaped arc guide rail 31. The other leg 33 is connected to the leg 32 via a connecting web 34 connected to the leg 32 and extending at an obtuse angle alpha. The arc running direction is also Z-shaped.

Bei der Ausführungsform nach Figur 4 ist parallel zum Kontakthebel 10 mit dem bewegbaren Kontaktstück 11 eine Kontaktträgerschiene 40 angeordnet, an dem das feststehende Kontaktstück 12 befestigt ist. Im eingeschalteten Zustand ist die Schiene 40 um die Dicke der beiden Kontaktstücke 11 und 12 vom Kontakthebel entfernt und Lichtbogenlöschbleche befinden sich zwischen dem Kontakthebel und der Schiene 40 nicht. Vor den Kontaktstücken 11 und 12 befindet sich in gleicher Weise wie bei den anderen Ausführungsformen die Sperrplatte 21.In the embodiment according to FIG. 4, a contact carrier rail 40 is arranged parallel to the contact lever 10 with the movable contact piece 11, to which the fixed contact piece 12 is fastened. In the switched-on state, the rail 40 is removed from the contact lever by the thickness of the two contact pieces 11 and 12, and there are no arc-quenching plates between the contact lever and the rail 40. The locking plate 21 is located in front of the contact pieces 11 and 12 in the same way as in the other embodiments.

Bei allen Ausführungsformen gemäß den Figuren 1 bis 4 läuft der eine Lichtbogenfußpunkt vom festen Kontaktstück an der Lichtbogenleitschiene 13, 16, 14; 26, 27; 31, 32, 33; 40 hin zu einer Löscheinrichtung, wogegen der andere Fußpunkt zunächst auf dem Kontakthebel 10 läuft, bevor er bei den Ausführungen nach den Figuren 1 und 2 auf die Leitschiene 18 bzw. 28 kommutiert. Bei den Ausführungen nach den Figuren 3 und 4 bleibt der Fußpunkt auf dem Kontakthebel 10 und gelangt mit dem Kontakthebel 10 als Lichtbogenleitschiene zu den Löschblechen 15 (Figur 3) oder zu einer anderen Löscheinrichtung, die in Figur 4 nicht dargestellt ist.In all the embodiments according to FIGS. 1 to 4, the one arc base point runs from the fixed contact piece on the arc guide rail 13, 16, 14; 26, 27; 31, 32, 33; 40 towards an extinguishing device, whereas the other base point first runs on the contact lever 10 before it commutates on the guide rail 18 or 28 in the embodiments according to FIGS. 1 and 2. 3 and 4, the base point remains on the contact lever 10 and arrives with the contact lever 10 as an arc guide rail to the quenching plates 15 (FIG. 3) or to another quenching device which is not shown in FIG. 4.

Claims (2)

Lichtbogenlöschanordnung für einen elektrischen Schalter, insbesondere für einen Leitungsschutzschalter oder ein Schütz, mit einer ein an einem schwenkbaren oder parallel zu sich zur Kontaktstellenöffnung verschiebbaren Kontakthebel (10) an dessen Ende angebrachtes bewegliches (11) und ein feststehendes Kontaktstück (12) aufweisenden, im Löschkammerraum befindlichen Kontaktstelle, an der bei einer Schalthandlung ein Lichtbogen entsteht, dessen Fußpunkte von den Kontaktstücken (11, 12) auf Lichtbogenleitschienen kommutieren, die den Lichtbogen einer Löscheinrichtung (15), vorzugsweise einem Lichtbogenlöschblechpaket, zuführen, wobei der Kontakthebel (10) einen Teilabschnitt der Lichtbogenleitschienen bildet, dadurch gekennzeichnet, daß in Lichtbogenlaufrichtung (P) gesehen vor der Kontaktstelle (11, 12) und vor dem Kontakthebel (10) eine Sperrplatte (21) vorgesehen ist, die den Löschkammerraum (22) im Bereich vor der Kontaktstelle (11, 12) nach vorn hin, also entgegen der Lichtbogenlaufrichtung (P) abdichtet, so daß eine Gasströmung in den Raum vor der Kontaktstelle verhindert ist.Arc quenching arrangement for an electrical switch, in particular for a circuit breaker or a contactor, with a movable (11) attached to a pivotable or parallel to the contact point opening movable contact lever (10) and having a fixed contact piece (12) in the quenching chamber space Located contact point at which an arc arises during a switching operation, the base points of which commutate from the contact pieces (11, 12) on arc guide rails, which feed the arc to an extinguishing device (15), preferably an arc extinguisher stack, the contact lever (10) being a partial section of the Arc guide rails, characterized in that a blocking plate (21) is provided in front of the contact point (11, 12) and in front of the contact lever (10), viewed in the direction of arc travel (P), which blocks the quenching chamber (22) in the area in front of the contact point (11, 12) towards the front, i.e. against the Arc running direction (P) seals, so that a gas flow into the space in front of the contact point is prevented. Lichtbogenlöschanordnung nach Anspruch 1, mit einem schwenkbaren Kontakthebel, an dem das bewegliche Kontaktstück befestigt ist, dadurch gekennzeichnet, daß die Sperrplatte (21) senkrecht zum Kontakthebel (10) verläuft, wenn sich dieser in Einschaltstellung befindet.Arc extinguishing arrangement according to Claim 1, with a pivotable contact lever to which the movable contact piece is fastened, characterized in that the locking plate (21) extends perpendicular to the contact lever (10) when it is in the switched-on position.
EP94102534A 1993-02-27 1994-02-19 Arc quenching device in particular for an automatic cut-out or contactors Expired - Lifetime EP0614208B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4306226 1993-02-27
DE4306226A DE4306226A1 (en) 1993-02-27 1993-02-27 Arc extinguishing arrangement, in particular for a circuit breaker and contactors

Publications (3)

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EP0614208A2 true EP0614208A2 (en) 1994-09-07
EP0614208A3 EP0614208A3 (en) 1995-07-26
EP0614208B1 EP0614208B1 (en) 1997-04-23

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EP (1) EP0614208B1 (en)
AT (1) ATE152284T1 (en)
DE (2) DE4306226A1 (en)

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SG87135A1 (en) * 1999-07-29 2002-03-19 Abb Patent Gmbh Arc splitter stack for an electric switching device

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN108447749B (en) * 2018-04-04 2023-09-12 上海电科电器科技有限公司 Arc striking and running structure

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DE2816352A1 (en) * 1978-04-12 1979-10-25 Siemens Ag LV circuit breaker - has protective element preventing entry of arc gases to switching mechanism mounted in one of pole chambers

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DE1021054B (en) * 1954-05-11 1957-12-19 Siemens Ag Switching chamber for electrical switchgear
CH348437A (en) * 1955-09-22 1960-08-31 Siemens Ag Arrangement for extinguishing arcs in electrical switching devices
DE1926693A1 (en) * 1969-05-24 1970-11-26 Siemens Ag Arc extinguishing chamber for low-voltage circuit breakers
DE7027838U (en) * 1970-07-24 1971-12-23 Siemens Ag SWITCHING DEVICE WITH A SWITCH CHAMBER
DE2816352A1 (en) * 1978-04-12 1979-10-25 Siemens Ag LV circuit breaker - has protective element preventing entry of arc gases to switching mechanism mounted in one of pole chambers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1041616C (en) * 1994-03-11 1999-01-13 中国石油化工总公司 Method No.2 for synthesizing beta zeolite
SG87135A1 (en) * 1999-07-29 2002-03-19 Abb Patent Gmbh Arc splitter stack for an electric switching device

Also Published As

Publication number Publication date
ATE152284T1 (en) 1997-05-15
EP0614208A3 (en) 1995-07-26
EP0614208B1 (en) 1997-04-23
DE4306226A1 (en) 1994-09-01
DE59402471D1 (en) 1997-05-28

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