EP0183145B1 - Electrical switch device, especially a protective power circuit breaker - Google Patents

Electrical switch device, especially a protective power circuit breaker Download PDF

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Publication number
EP0183145B1
EP0183145B1 EP85114538A EP85114538A EP0183145B1 EP 0183145 B1 EP0183145 B1 EP 0183145B1 EP 85114538 A EP85114538 A EP 85114538A EP 85114538 A EP85114538 A EP 85114538A EP 0183145 B1 EP0183145 B1 EP 0183145B1
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EP
European Patent Office
Prior art keywords
wall
switching device
housing
electrical switching
contact point
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
Application number
EP85114538A
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German (de)
French (fr)
Other versions
EP0183145A3 (en
EP0183145A2 (en
Inventor
Klaus Dipl.-Ing. Greefe
Richard Dipl.-Ing. Kommert
Erwin Ing. Grad. Muders
Rudolf Sellner
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ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
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Publication date
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Publication of EP0183145A2 publication Critical patent/EP0183145A2/en
Publication of EP0183145A3 publication Critical patent/EP0183145A3/en
Application granted granted Critical
Publication of EP0183145B1 publication Critical patent/EP0183145B1/en
Expired 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
    • H01H9/346—Details concerning the arc formation chamber
    • 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
    • H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber

Definitions

  • the invention relates to an electrical switching device, in particular a circuit breaker, according to the preamble of claim 1.
  • the arc quenching chamber is delimited on both sides by wall plates made of insulating material, which are at a certain distance from the neighboring housing walls (see DE-B-2 349 187).
  • wall plates made of insulating material, which are at a certain distance from the neighboring housing walls (see DE-B-2 349 187).
  • a switching device of the type mentioned has become known from DE-B-1 185 269.
  • This known switching device is one with a double contact point with insulating plates which are arranged at a distance from the housing side walls and also at a distance from the fixed or movable contact pieces.
  • the object of the invention is to provide an electrical switching device of the type mentioned, the arc extinguishing characteristics of which are considerably improved compared to the known arrangement, the manufacture and manufacture also being simplified.
  • a flow channel is located only on one side of the arc quenching chamber, namely directly in front of the arc quenching plate pack, because it has been found that only a single channel is sufficient to form a sufficient flow, which simplifies production.
  • the special assignment of the wall protrusion to the arc quenching plate package also prevents backflow to the side of the contact point and the entire gas to be used for the arc quenching is led directly to the contact point without large gaps.
  • a further improvement is brought about by the introduction of the grooves according to the characterizing part of claim 3, insofar as the gas flow is improved overall by practically fresh air being sucked in through the grooves.
  • an iron plate is inserted into the wall plate according to claim 4, which serves to improve the flow of the arc from the contact pieces.
  • DE-B-2 349 187 already mentioned at the beginning to provide rags on both sides of the quenching chamber which are used to improve the arc running.
  • the known arrangement is not a quenching chamber with arc-quenching plates, son the one with a ceramic screen to extinguish the arc, and the two plates only serve to extend the arc substantially in the direction of the movement opening of the movable contact piece. This has the consequence that the height of the arc quenching chamber is of essential importance in the known arrangement. Embedding of so-called blow plates has become known per se from DE-A-1 104 019.
  • the device according to the invention is preferably used in an electrical circuit breaker in which a movable and a fixed contact piece are arranged in a current path and are opened by means of a thermal release in the form of a thermobimetal in the event of an overcurrent and by means of a magnetic release in the event of a short-circuit current.
  • a thermal release in the form of a thermobimetal in the event of an overcurrent and by means of a magnetic release in the event of a short-circuit current.
  • the individual components of the switch are located in a housing which is formed from two housing elements located opposite one another, of which the two housing walls 10 and 11 can be seen in FIGS. 1 and 2.
  • the device for interrupting a current path is formed from a movable contact piece 12 and a fixed contact piece 13, which together form a contact point 14.
  • the movable contact piece 12 is formed as a horn on a contact lever 15 and the fixed contact piece 13 is formed by a U-shaped arrangement with two legs 16 and 17.
  • the contact point 14 there is an arc extinguisher plate package 18 with individual extinguishing plates 19.
  • the arc extinguishing plate assembly 18 can also be replaced by a so-called cooling plate arrangement if the switch is to be used as a so-called zero point extinguisher.
  • a projection 20 which extends as far as the contact point and limits the arc-quenching plate packet 18 towards the front, that is to say counter to the direction of arc travel.
  • a transverse wall 21 is formed on the opposite wall, which forms a limiting web in the area of the fixed contact piece 13.
  • a free space 22 is formed between the limiting web 21 and the front region of the arc-quenching plate packet 18, into which a wall plate 23 (see FIGS. 4 and 5) is inserted, which receives an iron plate 24.
  • the wall plate 23 sits at a distance from the housing wall 11, so that a flow channel 25 is formed between the wall plate 23 and the housing wall 11, the arc gases allowing a flow in the direction of arrow P against the running direction of the arc PL into the arc quenching plate packet 18.
  • a recess 26 is provided on the fixed contact piece in the region of the wall plate and projects on both sides, thereby ensuring the distance between the wall plate 23 and the fixed contact piece.
  • the projection 20 there are grooves 27, the task of which is to increase the creepage distance in the region of the wall.
  • the housing wall 10 forms a housing base 30, to which a projection 31 connects, the width of which corresponds to the width of the wall plate.
  • the wall plate 23 is inserted into this projection 31.
  • the housing wall 11 helps to hold the wall plate 23 by forming a sack-like depression together with the projection 31 on the housing wall 10, in which the wall plate 23 is guided and fixed.
  • a wall projection 11 and 11b is also provided above and below the channel, which limit the channel 22 upwards and downwards.

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung betrifft ein elektrisches Schaltgerät, insbesondere einen Leitungsschutzschalter, nach dem Oberbegriff des Anspruches 1.The invention relates to an electrical switching device, in particular a circuit breaker, according to the preamble of claim 1.

Es sind elektrische Schaltgeräte, insbesondere Leitungsschutzschalter bekanntgeworden, bei denen die Lichtbogenlöschkammer durch die beiden Gehäusewände des Schaltgerätes begrenzt wird. Die Löschung des Lichtbogens erfolgt dabei innerhalb des Lichtbogenlöschblechpaketes in üblicher Weise.Electrical switching devices, in particular circuit breakers, have become known in which the arc quenching chamber is delimited by the two housing walls of the switching device. The arc is extinguished in the usual way within the arc quenching plate package.

Um bei Löschkammern, die anstatt eines Lichtbogenlöschblechpaketes eine Siebkeramik aufweisen, die Löschfähigkeit zu erhöhen, wird die Lichtbogenlöschkammer beidseitig von Wandplatten aus Isolierstoff begrenzt, die zu den benachbarten Gehäusewänden einen bestimmten Abstand einnehmen (siehe DE-B-2 349 187). Dadurch werden Strömungskanäle erzeugt, die die aus der Siebkeramik austretenden Löschgase zurück- und wieder in die Löschkammer einleiten, wodurch ein Strömungskreislauf mit entsprechend erhöhter Kühlwirkung auf den Lichtbogen entsteht.In order to increase the extinguishing capacity of quenching chambers that have a ceramic screen instead of an arc-quenching plate package, the arc quenching chamber is delimited on both sides by wall plates made of insulating material, which are at a certain distance from the neighboring housing walls (see DE-B-2 349 187). As a result, flow channels are created which return the quenching gases emerging from the screen ceramic and then back into the quenching chamber, thereby creating a flow circuit with a correspondingly increased cooling effect on the arc.

Ein Schaltgerät der eingangs genannten Art ist aus der DE-B-1 185 269 bekanntgeworden. Dieses bekannte Schaltgerät ist ein solches mit einer Doppelkontaktstelle mit Isolierplatten, die in Abstand zu den Gehäuseseitenwänden und ebenfalls in Abstand zu den festen bzw. beweglichen Kontaktstücken angeordnet sind.A switching device of the type mentioned has become known from DE-B-1 185 269. This known switching device is one with a double contact point with insulating plates which are arranged at a distance from the housing side walls and also at a distance from the fixed or movable contact pieces.

Aufgabe der Erfindung ist es, ein elektrisches Schaltgerät der eingangs genannten Art zu schaffen, deren Lichtbogenlöschcharakteristiken gegenüber der bekannten Anordnung erheblich verbessert sind, wobei zusätzlich noch die Fertigung und die Herstellung vereinfacht sind.The object of the invention is to provide an electrical switching device of the type mentioned, the arc extinguishing characteristics of which are considerably improved compared to the known arrangement, the manufacture and manufacture also being simplified.

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.

Bei der erfindungsgemäßen Vorrichtung befindet sich ein Strömungskanal lediglich auf einer Seite der Lichtbogenlöschkammer und zwar unmittelbar vor dem Lichtbogenlöschblechpaket, weil es sich nämlich herausgestellt hat, daß lediglich ein einziger Kanal zur Bildung einer ausreichenden Umströmung ausreicht, dadurch wird die Fertigung vereinfacht. Darüberhinaus wird auch durch die spezielle Zuordnung des Wandvorsprunges zu dem Lichtbogenlöschblechpaket eine Rückströmung seitlich zu der Kontaktstelle vermieden und das gesamte, für die Lichtbogenlöschung zu verwendende Gas wird direkt und ohne große Zwischenräume zur Kontaktstelle hin geführt.In the device according to the invention, a flow channel is located only on one side of the arc quenching chamber, namely directly in front of the arc quenching plate pack, because it has been found that only a single channel is sufficient to form a sufficient flow, which simplifies production. In addition, the special assignment of the wall protrusion to the arc quenching plate package also prevents backflow to the side of the contact point and the entire gas to be used for the arc quenching is led directly to the contact point without large gaps.

Zwar ist aus der FR-PS-1 584 835 eine Ausgestaltung einer Schaltkammer bekanntgeworden, bei der lediglich eine Kontaktstelle vorgesehen ist und bei der ebenfalls ein Umströmungskanal zwischen einer Zwischenwandplatte und einer Gehäusewandung gebildet ist. Hierbei wird aber wegen der Abstände zwischen der Gehäusewandung auf der einen Seite und der Zwischenwandplatte auf der anderen Seite zur Kontaktstelle, d.h. zum beweglichen Kontaktstück hin, nicht der besondere Vorteil erreicht, wie er bei der Erfindung erzielt werden kann. Aufgrund der Abstände dieser einzelnen Wandbereiche und Wandteile zum beweglichen Kontaktstück hin sind ein Rückstau und eine Rückströmung aus dem Löschblechpaket nach vorn und seitlich an dem beweglichen Kontaktstück vorbei nicht ohne weiteres zu verhindern, was bei der Erfindung deswegen nicht der Fall ist, weil das Lichtbogenlöschblechpaket beidseitig zur Kontaktstelle nach vorne hin, also entgegen der Lichtbogenlaufrichtung praktisch verschlossen ist so daß eine Gasströmung entgegen der Lichtbogenlaufrichtung nur in dem Kanal erfolgen kann.From FR-PS-1 584 835 an embodiment of a switching chamber has become known, in which only one contact point is provided and in which a flow channel is also formed between an intermediate wall plate and a housing wall. However, because of the distances between the housing wall on one side and the intermediate wall plate on the other side, it becomes a contact point, i.e. towards the movable contact piece, does not achieve the particular advantage that can be achieved with the invention. Due to the spacing of these individual wall areas and wall parts from the movable contact piece, a backflow and a backflow from the quenching plate package to the front and laterally past the movable contact piece cannot easily be prevented, which is not the case with the invention because the arc quenching plate package is on both sides towards the contact point towards the front, that is to say practically closed against the direction of the arc, so that a gas flow against the direction of the arc can only take place in the channel.

Aus der DE-B-1 104 019 geht zwar hervor, das Lichtbogenlöschblechpaket nach vorne hin teilweise zu begrenzen und Klötze an den Seitenwandungen vorzusehen, in denen sogenannte Blasbleche untergebracht sind. Diese Klötze grenzen an die Kontaktstelle an. Die Ausführung ist aber mit der erfindungsgemäßen Anordnung nicht vergleichbar, weil ein Kanal, der zu einer geführten Rückströmung führt, fehlt. Die dort eingezeichneten Kanäle sind echte Abluftkanäle, so daß das Konstruktionsgebiet anders ist als das bei der Erfindung.From DE-B-1 104 019 it is clear that the arc quenching plate packet is partially limited at the front and that blocks are provided on the side walls in which so-called blow plates are accommodated. These blocks are adjacent to the contact point. However, the design is not comparable to the arrangement according to the invention, because a channel that leads to a guided backflow is missing. The ducts drawn in there are real exhaust air ducts, so that the construction area is different from that in the invention.

Aus der DE-B-1 196 750 ist bekannt, die Löschkammer über den gesamten Bereich inklusive der Löschbleche mit Keramikplatten beidseitig zu begrenzen. Eine spezielle Gasführung wie bei der Erfindung ist nicht vorhanden.From DE-B-1 196 750 it is known to limit the quenching chamber on both sides over the entire area including the quenching plates with ceramic plates. There is no special gas routing as in the invention.

Aus der US-A-2 769 066 geht hervor, die Lichtbogenlöschbleche in Platten einzusetzen, wobei außerhalb der Platten jeweils beidseitig ein Kanal vorhanden ist. Dieser Kanal ist aber durch die Löschbleche in einzelne Kanalbereiche unterteilt und der Zweck dieser Kanäle besteht nicht darin, eine Rückströmung von Löschgas zu erreichen, sondern darin, daß die Löschgase in diesen beiden Kanälen gekühlt werden.From US-A-2 769 066 it is apparent that the arc-quenching plates are to be used in plates, a channel being provided on both sides of the plates outside the plates. However, this channel is divided into individual channel areas by the extinguishing plates and the purpose of these channels is not to achieve a backflow of extinguishing gas, but rather to cool the extinguishing gases in these two channels.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.Further advantageous embodiments of the invention can be found in the subclaims.

Die Umströmung wird dabei zusätzlich noch unterstützt durch die Merkmale des Anspruches 2.The flow around is additionally supported by the features of claim 2.

Eine weitere Verbesserung ist durch die Einbringung der Nuten gemäß kennzeichnendem Teil des Anspruches 3 bewirkt, insoweit, als die Gasströmung insgesamt verbessert wird, indem durch die Nuten praktisch Frischluft angesaugt wird.A further improvement is brought about by the introduction of the grooves according to the characterizing part of claim 3, insofar as the gas flow is improved overall by practically fresh air being sucked in through the grooves.

Dabei ist in besonders vorteilhafter Weise in die Wandplatte gemäß Anspruch 4 eine Eisenplatte eingefügt, die zur Verbesserung des Ablaufes des Lichtbogens von den Kontaktstücken dient. Zwar ist aus der eingangs schon erwähnten DE-B-2 349 187 bekanntgeworden, beidseitig zu der Löschkammer Lappen vorzusehen, die zu einer Verbesserung des Lichtbogenlaufes dienen. Es handelt sich bei der bekannten Anordnung allerdings nicht um eine Löschkammer mit Lichtbogenlöschblechen, sondem um eine solche mit Siebkeramik zur Löschung des Lichtbogens, und die beiden Platten dienen auch nur dazu, den Lichtbogen im wesentlichen in Richtung der Bewegungsöffnung des beweglichen Kontaktstückes zu verlängern. Dies hat zur Folge, daß die Höhe der Lichtbogenlöschkammer bei der bekannten Anordnung von wesentlicher Bedeutung ist. Ein Einbetten von sogenannten Blasblechen ist aus der DE-A-1 104 019 an sich bekanntgeworden.In a particularly advantageous manner, an iron plate is inserted into the wall plate according to claim 4, which serves to improve the flow of the arc from the contact pieces. It has become known from DE-B-2 349 187 already mentioned at the beginning to provide rags on both sides of the quenching chamber which are used to improve the arc running. However, the known arrangement is not a quenching chamber with arc-quenching plates, son the one with a ceramic screen to extinguish the arc, and the two plates only serve to extend the arc substantially in the direction of the movement opening of the movable contact piece. This has the consequence that the height of the arc quenching chamber is of essential importance in the known arrangement. Embedding of so-called blow plates has become known per se from DE-A-1 104 019.

Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, soll die Erfindung näher erläutert und beschrieben werden.The invention will be explained and described in more detail with reference to the drawing, in which an embodiment of the invention is shown.

Es zeigt:

  • Fig. 1 einen Querschnitt durch eine Lichtbogenlöschkammer gemäß der Linie I - I der Fig. 2,
  • Fig. 2 eine Schnittansicht gemäß der Schnittlinie 11 - II der Fig. 1,
  • Fig. 3 eine teilweise Seitenansicht der Lichtbogenlöschkammer der Fig. 1 bis 2 und
  • Fig. 4 eine Seitenansicht der Wandplatte mit eingesetztem Eisenplatte,
  • Fig. 5 ein Schnitt in Linie 111 - 111 der Fig. 4.
It shows:
  • 1 shows a cross section through an arc quenching chamber along the line I - I of FIG. 2,
  • 2 is a sectional view along the section line 11 - II of FIG. 1,
  • Fig. 3 is a partial side view of the arc quenching chamber of Figs. 1 to 2 and
  • 4 is a side view of the wall plate with an inserted iron plate,
  • 5 shows a section in line 111-111 of FIG. 4.

Die erfindungsgemäße Vorrichtung wird bevorzugt bei einem elektrischen Leitungsschutzschalter verwendet, bei dem in einem Strompfad ein bewegliches und ein festes Kontaktstück angeordnet ist, die mittels eines thermischen Auslösers in Form eines Thermobimetalles bei einem Überstrom und mittels eines magnetischen Auslösers bei einem Kurzschlußstrom geöffnet werden. Beim Öffnen der beiden Kontaktstücke entsteht ein Lichtbogen, der in ein Lichtbogenlöschblechpaket einlauft und dort gelöscht wird. Diese einzelnen Teile und Komponenten eines Leitungsschutzschalters sind bekannt, so daß hierauf nicht näher eingegangen werden muß.The device according to the invention is preferably used in an electrical circuit breaker in which a movable and a fixed contact piece are arranged in a current path and are opened by means of a thermal release in the form of a thermobimetal in the event of an overcurrent and by means of a magnetic release in the event of a short-circuit current. When the two contact pieces are opened, an arc arises, which enters an arc quenching plate package and is extinguished there. These individual parts and components of a circuit breaker are known, so that there is no need to go into them in detail.

Die einzelnen Komponenten des Schalters befinden sich in einem Gehäuse, das aus zwei sich gegenüberliegenden Gehäuseelementen gebildet ist, von denen in den Figuren 1 und 2 die beiden Gehäusewände 10 und 11 zu sehen sind. Die Vorrichtung zur Unterbrechung eines Strompfades ist gebildet aus einem beweglichen Kontaktstück 12 und einem Festkontaktstück 13, die miteinander eine Kontaktstelle 14 bilden.The individual components of the switch are located in a housing which is formed from two housing elements located opposite one another, of which the two housing walls 10 and 11 can be seen in FIGS. 1 and 2. The device for interrupting a current path is formed from a movable contact piece 12 and a fixed contact piece 13, which together form a contact point 14.

Das bewegliche Kontaktstück 12 ist als Horn an einem Kontakthebel 15 angeformt und das Festkontaktstück 13 wird gebildet durch eine U-förmige Anordnung mit zwei Schenkeln 16 und 17. An die Kontaktstelle 14 schließt sich ein Lichtbogenlöschblechpaket 18 mit einzelnen Löschblechen 19 an. Gegebenenfalls kann das Lichtbogenlöschblechpaket 18 auch durch eine sogenannte Kühlblechanordnung ersetzt sein, wenn der Schalter als sogenannter Nullpunktlöscher verwendet werden soll.The movable contact piece 12 is formed as a horn on a contact lever 15 and the fixed contact piece 13 is formed by a U-shaped arrangement with two legs 16 and 17. At the contact point 14 there is an arc extinguisher plate package 18 with individual extinguishing plates 19. If necessary, the arc extinguishing plate assembly 18 can also be replaced by a so-called cooling plate arrangement if the switch is to be used as a so-called zero point extinguisher.

An der Gehäusewand 10 befindet sich ein Vorsprung 20, der bis zur Kontaktstelle hin reicht und das Lichtbogenlöschblechpaket 18 nach vorne hin, also entgegen der Lichtbogenlaufrichtung, begrenzt. An der gegenüberliegenden Wand ist lediglich eine Querwand 21 angeformt, die im Bereich des festen Kontaktstückes 13 einen Begrenzungssteg bildet. Zwischen dem Begrenzungssteg 21 und dem vorderen Bereich des Lichtbogenlöschblechpaketes 18 ist ein freier Raum 22 gebildet, in den eine Wandplatte 23 (siehe Fig. 4 und 5) eingefügt ist, die eine Eisenplatte 24 aufnimmt. Die Wandplatte 23 sitzt in Abstand zur Gehäusewand 11, so daß zwischen der Wandplatte 23 und der Gehäusewand 11 ein Strömungskanal 25 gebildet ist, der Lichtbogengasen eine Strömung in Pfeilrichtung P entgegen der Laufrichtung des Lichtbogens PL in das Lichtbogenlöschblechpaket 18 hinein gestattet.On the housing wall 10 there is a projection 20 which extends as far as the contact point and limits the arc-quenching plate packet 18 towards the front, that is to say counter to the direction of arc travel. Only a transverse wall 21 is formed on the opposite wall, which forms a limiting web in the area of the fixed contact piece 13. A free space 22 is formed between the limiting web 21 and the front region of the arc-quenching plate packet 18, into which a wall plate 23 (see FIGS. 4 and 5) is inserted, which receives an iron plate 24. The wall plate 23 sits at a distance from the housing wall 11, so that a flow channel 25 is formed between the wall plate 23 and the housing wall 11, the arc gases allowing a flow in the direction of arrow P against the running direction of the arc PL into the arc quenching plate packet 18.

Am Festkontaktstück ist im Bereich der Wandplatte und diese beidseitig überragend eine Aussparung 26 eingebracht, wodurch der Abstand zwischen der Wandplatte 23 und dem Festkontaktstück gewährleistet ist. In dem Vorsprung 20 befinden sich Nuten 27, deren Aufgabe es ist, den Kriechweg im Bereich der Wand zu erhöhen.A recess 26 is provided on the fixed contact piece in the region of the wall plate and projects on both sides, thereby ensuring the distance between the wall plate 23 and the fixed contact piece. In the projection 20 there are grooves 27, the task of which is to increase the creepage distance in the region of the wall.

Damit in der Wandplatte 23 die Eisenplatte 24 gehalten ist, befindet sich in der Wandplatte 23 eine als Tasche ausgebildete Vertiefung 28, in die die Eisenplatte 24 hineingedrückt und darin fixiert ist. Die Fixierung erfolgt durch eine an der Eisenplatte 24 angeformte Noppe 24a, die in ein Loch 28a an der Seitenwandung 28b der Vertiefung 28 einrastet.So that the iron plate 24 is held in the wall plate 23, there is a recess 28 in the wall plate 23 which is designed as a pocket and into which the iron plate 24 is pressed and fixed therein. The fixation takes place by means of a knob 24a molded onto the iron plate 24, which snaps into a hole 28a in the side wall 28b of the depression 28.

Aus der Fig. 2 ist ersichtlich, wie die Wandplatte 23 fixiert ist. Die Gehäusewand 10 bildet einen Gehäuseboden 30, an den sich ein Vorsprung 31 anschließt, dessen Breite der Breite der Wandplatte entspricht. In diesen Vorsprung 31 wird die Wandplatte 23 eingesetzt. Dabei hilft die Gehäusewandung 11 bei der Halterung der Wandplatte 23 mit, in dem sie zusammen mit dem Vorsprung 31 an der Gehäusewandung 10 eine sackartige Vertiefung bildet, in der die Wandplatte 23 geführt und festgelegt ist. Darüberhinaus ist zusätzlich oberhalb und unterhalb des Kanals jeweils ein Wandvorsprung 11 und 11b vorgesehen, die den Kanal 22 nach oben und unten begrenzen.From Fig. 2 it can be seen how the wall plate 23 is fixed. The housing wall 10 forms a housing base 30, to which a projection 31 connects, the width of which corresponds to the width of the wall plate. The wall plate 23 is inserted into this projection 31. Here, the housing wall 11 helps to hold the wall plate 23 by forming a sack-like depression together with the projection 31 on the housing wall 10, in which the wall plate 23 is guided and fixed. In addition, a wall projection 11 and 11b is also provided above and below the channel, which limit the channel 22 upwards and downwards.

Claims (7)

1. Electrical switching device, in particular automatic cut-out, having a housing with two lateral housing walls (10, 11), having a fixed and a movable contact element (13, 12) and having an arc quench chamber with arc quenching laminations (19), which is laterally delimited at least in the region of the contact point (12, 13) by two side wall elements (20, 23), characterized in that one side wall element (20) is formed by a wall projection formed on one housing wall (10) and extending up to the fixed and movable contact element (13, 12) and adjoining the latter directly, which wall projection closes off to the front against the arcing direction the region of the bundle of arc quenching laminations (18) between the contact point (12, 13) and that housing wall (10) having the wall projection, and in that the other side wall element (23) is formed by a wall panel (23) arranged at a distance to the other housing wall (11), thus leaving a channel (25) free between, which wall panel directly adjoins the fixed and movable contact element (13, 12) on one side and delimits to the front the region of the bundle of arc quenching laminations (18) between the contact point and the other housing wall (11) with the exception of the region of the channel (25), likewise against the arcing direction.
2. Electrical switching device according to Claim 1, characterized in that there is formed on the housing wall (11) adjacent to the wall panel (23) a transverse wall (21) in front of the wall panel (seen in the arcing direction) and at a distance thereto, which transverse wall extends bar-like towards the fixed contact element (13) and thus delimits the channel (25) to the front.
3. Electrical switching device according to Claim 1, characterized in that there are provided in the face of one wall projection facing the contact point (13, 12) grooves (27) extending transversely with respect to the opening direction of the movable contact element (12).
4. Electrical switching device according to one of Claims 1 or 2, characterized in that the wall panel (23) made of insulating material contains an iron plate (24) on the side facing away from the contact point.
5. Electrical switching device according to Claim 4, characterized in that the wall panel (23) has a recess (28) in which the iron plate (24) is held non-positively, for example by means of a detent.
6. Electrical switching device according to Claim 4 or 5, characterized in that the iron plate (24) is injected into the wall panel (23).
7. Electrical switching device according to one of Claims 1 to 6, characterized in that the bundle of arc quenching laminations (18) is inserted into and guided in a depression on the housing wall (11) adjacent to the wall panel (23), which depression is extended beyond the contact point against the arcing direction and in which the wall plate (23) is located and thus the channel (25) is formed.
EP85114538A 1984-11-27 1985-11-15 Electrical switch device, especially a protective power circuit breaker Expired EP0183145B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3443122 1984-11-27
DE19843443122 DE3443122A1 (en) 1984-11-27 1984-11-27 DEVICE FOR INTERRUPTING CIRCUITS

Publications (3)

Publication Number Publication Date
EP0183145A2 EP0183145A2 (en) 1986-06-04
EP0183145A3 EP0183145A3 (en) 1987-05-27
EP0183145B1 true EP0183145B1 (en) 1989-09-13

Family

ID=6251213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114538A Expired EP0183145B1 (en) 1984-11-27 1985-11-15 Electrical switch device, especially a protective power circuit breaker

Country Status (2)

Country Link
EP (1) EP0183145B1 (en)
DE (2) DE3443122A1 (en)

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AT410725B (en) * 1993-11-02 2003-07-25 Felten & Guilleaume Ag Oester SELF-SWITCH
FR2727240B1 (en) * 1994-11-18 1996-12-13 Schneider Electric Sa CUTTING CHAMBER OF AN ELECTRIC CIRCUIT BREAKER
FR2750795B1 (en) * 1996-07-05 1998-09-25 Schneider Electric Sa SWITCHING DEVICE FOR A HIGH-CALIBER ELECTRIC CIRCUIT BREAKER
KR100439389B1 (en) * 1999-12-02 2004-07-09 미쓰비시덴키 가부시키가이샤 Circuit breaker
EP1876617A1 (en) * 2006-07-06 2008-01-09 ABB PATENT GmbH Electrical installation switch with pre-arcing chamber, arcing horns and current limiting arc chute
DE102007001802B4 (en) * 2006-12-22 2010-02-25 Abb Ag Electrical switching device
DE102017204942B4 (en) * 2017-03-23 2022-01-20 Siemens Aktiengesellschaft Electromechanical protective switching device

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US2769066A (en) * 1953-02-02 1956-10-30 Westinghouse Electric Corp Circuit interrupters
DE1104019B (en) * 1959-09-11 1961-04-06 Continental Elektro Ind Ag Arc extinguishing chamber for electrical circuit breakers
DE1168529B (en) * 1961-06-26 1964-04-23 Licentia Gmbh Electrical switchgear with arc extinguishing device
DE1185269C2 (en) * 1961-08-21 1975-05-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt SINGLE-POLE SELF-SWITCH IN NARROW DESIGN
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Also Published As

Publication number Publication date
DE3443122A1 (en) 1986-05-28
DE3573041D1 (en) 1989-10-19
EP0183145A3 (en) 1987-05-27
EP0183145A2 (en) 1986-06-04

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