EP0251160A2 - Quenching device for electric circuit breaker - Google Patents

Quenching device for electric circuit breaker Download PDF

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Publication number
EP0251160A2
EP0251160A2 EP87109027A EP87109027A EP0251160A2 EP 0251160 A2 EP0251160 A2 EP 0251160A2 EP 87109027 A EP87109027 A EP 87109027A EP 87109027 A EP87109027 A EP 87109027A EP 0251160 A2 EP0251160 A2 EP 0251160A2
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EP
European Patent Office
Prior art keywords
plates
arc
prechamber
contact
contact piece
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.)
Granted
Application number
EP87109027A
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German (de)
French (fr)
Other versions
EP0251160A3 (en
EP0251160B1 (en
Inventor
Klaus Dipl.-Ing. Greefe
Werner Brückner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Brown Boveri und Cie AG Germany
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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Publication date
Application filed by Brown Boveri und Cie AG Germany, Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT87109027T priority Critical patent/ATE76536T1/en
Publication of EP0251160A2 publication Critical patent/EP0251160A2/en
Publication of EP0251160A3 publication Critical patent/EP0251160A3/en
Application granted granted Critical
Publication of EP0251160B1 publication Critical patent/EP0251160B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber

Definitions

  • the invention relates to an extinguishing device for electrical switches, in particular circuit breakers and circuit breakers, according to the preamble of claim 1.
  • Circuit breakers and miniature circuit breakers are provided to disconnect electrical lines that are subject to high current overcurrents from the supply network in the event of a fault.
  • a fixed and a movable contact piece are usually provided, which are connected to the respective connection terminals.
  • An arc guide rail is assigned to the movable contact piece, which serves to guide the arc into an arc-quenching plate stack.
  • On the Ge On the opposite side of the stack of quenching sheets there is another arc runner which is connected to the fixed contact piece.
  • the area in front of the stack of quenching sheets is referred to as the arc prechamber. It consists of the two guide rails and usually of two plates arranged opposite one another for flanking the arc, which preferably consist of ceramic or a gas-emitting material.
  • the extinguishing device is of particular importance in the case of switch systems which have a short-circuit current limiting effect.
  • a prerequisite for intensive short-circuit current limitation is quick and wide contact opening in the event of a short circuit.
  • the arc that is drawn commutates from the contacts to the arc guide rails and is then divided into the deion quenching chamber, which is the stack of quenching plates.
  • a high arc voltage is generated there to limit the current, so that the arc is extinguished.
  • the back-flowing pressure wave serves to equalize the negative pressure and to deionize the contact area.
  • Another known variant is designed such that the prechamber plates have an opening directly in the contact area, which enables the negative pressure to be released quickly and the contact path to be quickly re-consolidated.
  • this has the disadvantage that the first plasma column emerging from the contact pieces, at the slightest inclination, strikes an edge formed by the plate cut-open, which leads to a swirling of the plasma and results in sensitive delays in the development of the arc.
  • the invention therefore has for its object to provide an extinguishing device for electrical switches of the type mentioned, which is simple in construction and inexpensive to manufacture and whose design enables the vacuum to be released quickly and the contact path to be quickly re-solidified, and the arc development is accelerated.
  • the prechamber plates are closed in the contact area and that the arc column does not find any disruptive edges even in the case of an "inclined position".
  • the openings in the prechamber plates necessary for the rapid reduction of the negative pressure and the associated deionization of the contact section are located directly on the back of the movable contact piece and ensure that the contact section is quickly “flushed” because the movable contact piece moves towards the openings.
  • a further advantage of the invention consists in the design of the housing on the side of the fixed contact piece opposite to the direction of arcing, which ensures a rapid expansion of the plasma column that arises.
  • a web integrally formed in the housing which can be formed from the holder of the fixed contact piece and which is as close as possible to the contact point, prevents the pressure wave arising at the contact opening from flowing out in the direction opposite to the direction of arcing. This accelerates the formation of the plasma beam in the desired direction and significantly increases the movement of the arc from the contact area, which leads to a lower load on the contact area.
  • a section of a switch is shown in longitudinal section, which has a housing 10 with a prechamber 12 which is laterally delimited by prechamber plates 13.
  • the prechamber 12 receives a contact point 14 which is formed from a fixed contact piece 16 and a movable contact piece 18 which is connected to a connecting piece 19 via a connecting line 17.
  • a bracket 20 integrally formed on the housing wall 11 serves to fix the fixed contact piece 16, which connects to an upper arc guide rail 22 which, together with a lower arc guide rail 24, delimits a stack of quenching sheets 26 in the vertical direction.
  • the lower arc guide rail 24 continues in the connector 19.
  • the prechamber plates 13, which laterally delimit the prechamber 12, are designed in such a way that they cover the area at the contact points 14 and on the stack 26 of extinguishing plates flush.
  • an opening 15 is provided in the prechamber plates 13, which serves to compensate for and with the negative pressure which arises when the contact pieces 16, 18 of the prechamber 12 are opened With the help of the gas stream entering the pre-chamber 12 through the openings 15 to contribute to deionization.
  • the latter feature can be enhanced by using gas-emitting material for the prechamber plates 13.
  • Fig. 2 is also a section of a switch similar to that shown in Fig. 1, shown in longitudinal section, but in which the contact point 34 between the fixed contact 36 and the movable contact 38 occupies a different position.
  • the housing 30 shown here also has a prechamber 32 which is laterally delimited by prechamber plates 33.
  • the fixed contact piece 36 is here connected to the lower arc guide rail 44, while the movable contact piece 38 is connected to the upper arc guide rail 42 via a connecting line 37.
  • a bracket 40 formed on the housing wall 31 is used to fix the upper arc guide rail 42.
  • the arc guide rails 42, 44 form the upper and lower limit for a stack of quenching plates 46 located between them.
  • the prechamber plate 33 is also provided with an opening 35, which is also on the back of the movable contact piece 38 is arranged so that the contact point 34 is completely closed from the side.
  • the purpose of this opening 35 in the prechamber plates 33 is the same as already described in FIG. 1.
  • FIG. 3 corresponds almost congruently to the design of a housing 10 of a switch with prechamber 12 known from FIG. 1, so that the reference numbers selected in FIG. 1 can also be used here.
  • Deviating from the arrangement known from FIG. 1 is the additional arrangement of a web 21, which covers the fixed contact piece 16 horizontally and projects into the prechamber space 12.
  • This special configuration advantageously achieves rapid expansion of the arc. It is essential that the web 21 formed in the housing 20 is as close as possible to the contact point 14 and thereby aligns the pressure wave which arises when the contact point 14 opens in the direction of the arc. The associated faster formation of the plasma in the desired direction significantly increases the speed of the arc out of the contact area. This is associated with a significantly lower load on the contact point 14.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

In a quenching device for electrical circuit breakers, particularly power and line protective circuit breakers, in a housing (10, 30) with at least antechamber (12, 32) bounded on the sides by antechamber plates (13, 33), there is arranged a contact point (14, 34), which is formed from a fixed and a moving contact piece (16, 18, 36, 38) which are connected to arc conducting rails (22, 24, 42, 44) which each hold an arc quenching plate stack (26, 46) between them. The antechamber plates (13, 33) in this case overlap the contact point (14, 34) completely from the side, but have openings (15, 35) in the antechamber plates (13, 33) in the region of the rear side of the moving contact piece (18, 38). <IMAGE>

Description

Die Erfindung betrifft eine Löscheinrichtung für elek­trische Schalter, insbesondere Leistungs- und Leitungs­schutzschalter, gemäß dem Oberbegriff des Anspruches 1.The invention relates to an extinguishing device for electrical switches, in particular circuit breakers and circuit breakers, according to the preamble of claim 1.

Leistungsschalter sowie Leitungsschutzschalter sind dazu vorgesehen, im Störungsfall elektrische Leitungen, die mit Überströmen hoher Stromstärke belastet sind, vom speisenden Netz zu trennen. Hierzu sind üblicherweise ein festes und ein bewegliches Kontaktstück vorgesehen, die mit den jeweiligen Anschlußklemmen verbunden sind. Beim Öffnen des Schaltkontaktes, d.h. beim Abheben des beweglichen Kontaktstückes, entsteht ein Schaltlichtbo­gen, welcher in einer hierzu vorgesehenen Löscheinrich­tung gelöscht wird.Circuit breakers and miniature circuit breakers are provided to disconnect electrical lines that are subject to high current overcurrents from the supply network in the event of a fault. For this purpose, a fixed and a movable contact piece are usually provided, which are connected to the respective connection terminals. When opening the switch contact, i.e. when the movable contact piece is lifted off, a switching arc arises, which is extinguished in a quenching device provided for this purpose.

Der prinzipielle Aufbau solcher mit Löscheinrichtung versehenen elektrischen Schalter ist weitgehend gleich. Dem beweglichen Kontaktstück ist eine Lichtbogenleit­schiene zugeordnet, die dazu dient, den Lichtbogen in einen Lichtbogen-Löschblechstapel zu leiten. Auf der Ge­ genseite des Löschblechstapels befindet sich eine weite­re Lichtbogenlaufschiene, die mit dem festen Kontakt­stück verbunden ist. Der Bereich vor dem Löschblechsta­pel wird als Lichtbogen-Vorkammer bezeichnet. Sie be­steht aus den beiden Leitschienen und üblicherweise aus zwei einander gegenüber angeordneten Platten zur Flan­kierung des Lichtbogens, welche vorzugsweise aus Keramik oder einem gasabgebenden Material bestehen.The basic structure of such electrical switches provided with an extinguishing device is largely the same. An arc guide rail is assigned to the movable contact piece, which serves to guide the arc into an arc-quenching plate stack. On the Ge On the opposite side of the stack of quenching sheets there is another arc runner which is connected to the fixed contact piece. The area in front of the stack of quenching sheets is referred to as the arc prechamber. It consists of the two guide rails and usually of two plates arranged opposite one another for flanking the arc, which preferably consist of ceramic or a gas-emitting material.

Insbesondere bei Schaltersystemen, die stark kurzschluß­strombegrenzend wirken, ist die Löscheinrichtung von Bedeutung. Voraussetzung für eine intensive Kurzschluß­strombegrenzung ist eine schnelle und weite Kontaktöff­nung bei anstehendem Kurzschluß. Der dabei gezogene Lichtbogen kommutiert von den Kontakten auf die Lichtbo­genleitschienen um sich anschließend in der Deion-Lösch­kammer, das ist der Löschblechstapel, zu unterteilen. Dort wird eine hohe Lichtbogenspannung zur Strombegren­zung erzeugt, so daß der Lichtbogen erlischt.The extinguishing device is of particular importance in the case of switch systems which have a short-circuit current limiting effect. A prerequisite for intensive short-circuit current limitation is quick and wide contact opening in the event of a short circuit. The arc that is drawn commutates from the contacts to the arc guide rails and is then divided into the deion quenching chamber, which is the stack of quenching plates. A high arc voltage is generated there to limit the current, so that the arc is extinguished.

Zwischen den Außenseiten der Vorkammerplatte und der inneren Gehäusewand des Schaltgerätes ist in der Regel ein Spalt, der eine Zurückführung des Überdruckes aus dem Löschblechstapel gestattet, ohne die Entwicklung des Lichtbogens zu stören. Die rückströmende Druckwelle dient zum Ausgleich des Unterdruckes und zur Entionisie­rung im Kontaktbereich.There is usually a gap between the outer sides of the prechamber plate and the inner housing wall of the switching device, which allows the excess pressure to be returned from the stack of quenching plates without interfering with the development of the arc. The back-flowing pressure wave serves to equalize the negative pressure and to deionize the contact area.

Bei den bisher bekannten Systemen besteht der Nachteil, daß die Rückführung der Druckwelle bei geschlossenen Vorkammerplatten weit oberhalb der Kontaktstelle er­folgt. Der Unterdruck wird dabei nur relativ langsam ausgeglichen und demzufolge erfolgt eine langsame Wie­derverfestigung der Kontaktstrecke.The disadvantage of the previously known systems is that the pressure wave is returned far above the contact point when the prechamber plates are closed. The negative pressure is compensated for only relatively slowly and consequently the contact path is slowly re-consolidated.

Eine weitere bekannte Variante ist so ausgestaltet, daß die Vorkammerplatten unmittelbar im Kontaktbereich eine Öffnung aufweisen, welche einen schnellen Abbau des Un­terdruckes sowie eine schnelle Wiederverfestigung der Kontaktstrecke ermöglicht. Andererseits hat dies jedoch den Nachteil, daß die aus den Kontaktstücken austretende erste Plasmasäule bei der geringsten Schräglage auf eine durch den Plattenaufschnitt gebildete Kante auftrifft, was zu einer Verwirbelung des Plasmas führt und empfind­liche zeitliche Verzögerungen der Lichtbogenentwicklung zur Folge hat.Another known variant is designed such that the prechamber plates have an opening directly in the contact area, which enables the negative pressure to be released quickly and the contact path to be quickly re-consolidated. On the other hand, however, this has the disadvantage that the first plasma column emerging from the contact pieces, at the slightest inclination, strikes an edge formed by the plate cut-open, which leads to a swirling of the plasma and results in sensitive delays in the development of the arc.

Die Entstehung einer Schräglage des Plasmastrahles läßt sich bei bisher bekannten Kontaktsysteme bereits nach der ersten Lastschaltung nicht mehr ausschließen infolge von Kontaktrauhigkeiten und dadurch entstehender asymme­trischer Stromzuführung.In the case of previously known contact systems, the occurrence of an oblique position of the plasma beam can no longer be ruled out after the first load switching due to contact roughness and the resulting asymmetrical power supply.

Die Erfindung stellt sich daher die Aufgabe, eine Lö­scheinrichtung für elektrische Schalter der eingangs genannten Art zu schaffen, die einfach aufgebaut und kostengünstig herstellbar ist und deren Gestaltung einen schnellen Abbau des Unterdrucks sowie eine schnelle Wie­derverfestigung der Kontaktstrecke ermöglicht und die Lichtbogenentwicklung beschleunigt.The invention therefore has for its object to provide an extinguishing device for electrical switches of the type mentioned, which is simple in construction and inexpensive to manufacture and whose design enables the vacuum to be released quickly and the contact path to be quickly re-solidified, and the arc development is accelerated.

Die Lösung der Aufgabe besteht in den kennzeichnenden Merkmalen des Anspruches 1.The solution to the problem consists in the characterizing features of claim 1.

Danach ist vorgesehen, daß die Vorkammerplatten im Kon­taktbereich geschlossen sind und die Lichtbogensäule auch bei "Schieflage" keine störenden Kanten vorfindet. Die zum schnellen Abbau des Unterdruckes und der damit verbundenen Entionisierung der Kontaktstrecke notwendi­gen Öffnungen in den Vorkammerplatten liegen direkt auf der Rückseite des beweglichen Kontakstückes uns sorgen für eine schnelle "Durchspülung" der Kontaktstrecke, da das bewegliche Kontaktstück sich auf die Öffnungen zube­wegt.According to this, it is provided that the prechamber plates are closed in the contact area and that the arc column does not find any disruptive edges even in the case of an "inclined position". The openings in the prechamber plates necessary for the rapid reduction of the negative pressure and the associated deionization of the contact section are located directly on the back of the movable contact piece and ensure that the contact section is quickly "flushed" because the movable contact piece moves towards the openings.

Ein weiterer Vorteil der Erfindung besteht in der Ausge­staltung des Gehäuses an der der Lichtbogenlaufrichtung entgegengesetzen Seite des festen Kontaktstückes, was für eine schnelle Ausweitung der entstehenden Plasmasäu­le sorgt.A further advantage of the invention consists in the design of the housing on the side of the fixed contact piece opposite to the direction of arcing, which ensures a rapid expansion of the plasma column that arises.

Ein im Gehäuse angeformter Steg, welcher aus der Halte­rung des festen Kontaktstückes ausgebildet werden kann und der so nahe wie möglich an der Kontaktstelle liegt, verhindert, daß die bei Kontaktöffnung entstehende Druckwelle in die der Lichtbogenlaufrichtung entgegenge­setzten Richtung abströmt. Dies beschleunigt die Ausbil­dung des Plasmastrahls in der gewünschten Richtung und erhöht deutlich die Bewegung des Lichtbogens aus dem Kontaktbereich, was zu einer geringeren Belastung der Kontaktfläche führt.A web integrally formed in the housing, which can be formed from the holder of the fixed contact piece and which is as close as possible to the contact point, prevents the pressure wave arising at the contact opening from flowing out in the direction opposite to the direction of arcing. This accelerates the formation of the plasma beam in the desired direction and significantly increases the movement of the arc from the contact area, which leads to a lower load on the contact area.

Diese und weitere vorteilhafte Ausgestaltungen und Ver­besserungen der Erfindung sind den Unteransprüchen zu entnehmen.These and further advantageous refinements and improvements of the invention can be found in the subclaims.

Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, sollen die Erfindung, vor­teilhafte Ausgestaltungen und Verbesserungen der Erfin­dung sowie weitere Vorteile näher erläutert und be­schrieben werden.The invention, advantageous refinements and improvements of the invention and further advantages are to be explained and described in more detail with reference to the drawing, in which an exemplary embodiment of the invention is shown.

Es zeigen:

  • Fig. 1 Einen Ausschnitt aus einem Schalter mit Vor­kammer im Längsschnitt, bei dem der Festkon­takt an die oberer Lichtbogenleitschiene an­schließt,
  • Fig. 2 einen Ausschnitt eines Schalters mit Vorkammer im Längsschnitt, bei dem der Festkontakt an die untere Lichtbogenleitschiene anschließt,
  • Fig. 3 einen Ausschnitt eines Schalters mit Vorkammer im Längsschnitt, bei dem der Festkontakt an die obere Lichtbogenleitschiene anschließt und mit einem Steg überdeckt ist.
Show it:
  • 1 shows a section of a switch with antechamber in longitudinal section, in which the fixed contact connects to the upper arc guide rail,
  • 2 shows a detail of a switch with a prechamber in longitudinal section, in which the fixed contact connects to the lower arc guide rail,
  • Fig. 3 shows a detail of a switch with antechamber in longitudinal section, in which the fixed contact connects to the upper arc guide rail and is covered with a web.

In Fig. 1 ist ein Ausschnitt eines Schalters im Längs­schnitt gezeigt, der ein Gehäuse 10 mit einer Vorkammer 12 aufweist, welche von Vorkammerplatten 13 seitlich begrenzt ist. Die Vorkammer 12 nimmt eine Kontaktstelle 14 auf, welche aus einem festen Kontaktstück 16 und ei­nem beweglichen Kontaktstück 18 gebildet ist, welches über eine Verbindungsleitung 17 mit einem Anschlußstück 19 verbunden ist.In Fig. 1 a section of a switch is shown in longitudinal section, which has a housing 10 with a prechamber 12 which is laterally delimited by prechamber plates 13. The prechamber 12 receives a contact point 14 which is formed from a fixed contact piece 16 and a movable contact piece 18 which is connected to a connecting piece 19 via a connecting line 17.

Eine an die Gehäusewand 11 angeformte Halterung 20 dient zur Fixierung des festen Kontaktstückes 16, welches an eine obere Lichtbogenleitschiene 22 anschließt, welche gemeinsam mit einer unteren Lichtbogenleitschiene 24 einen Löschblechstapel 26 in vertikaler Richtung be­grenzt.A bracket 20 integrally formed on the housing wall 11 serves to fix the fixed contact piece 16, which connects to an upper arc guide rail 22 which, together with a lower arc guide rail 24, delimits a stack of quenching sheets 26 in the vertical direction.

Die untere Lichtbogenleitschiene 24 setzt sich fort in dem Anschlußstück 19.The lower arc guide rail 24 continues in the connector 19.

Die Vorkammerplatten 13, welche die Vorkammer 12 seit­lich begrenzen, sind so gestaltet, daß sie den Bereich an den Kontaktstellen 14 und am Löschblechstapel 26 bün­dig abdecken. An der Rückseite des beweglichen Kontakt­stückes 18, d.h. in Öffnungsrichtung, ist eine Öffnung 15 in den Vorkammerplatten 13 vorgesehen, welche dazu dient, den bei Öffnen der Kontaktstücke 16,18 der Vor­kammer 12 entstehenden Unterdruck auszugleichen und mit Hilfe des durch die Öffnungen 15 in die Vorkammer 12 eintretenden Gasstromes zur Entionisierung beizutragen. Das letztgenannte Merkmal kann verstärkt werden durch Verwendung von gasabgebenden Material für die Vorkammer­platten 13.The prechamber plates 13, which laterally delimit the prechamber 12, are designed in such a way that they cover the area at the contact points 14 and on the stack 26 of extinguishing plates flush. At the rear of the movable contact piece 18, ie in the opening direction, an opening 15 is provided in the prechamber plates 13, which serves to compensate for and with the negative pressure which arises when the contact pieces 16, 18 of the prechamber 12 are opened With the help of the gas stream entering the pre-chamber 12 through the openings 15 to contribute to deionization. The latter feature can be enhanced by using gas-emitting material for the prechamber plates 13.

Wesentlich für den Effekt der Lichtbogenlenkung ist, daß die Kontaktstelle 14 unmittelbar seitlich völlig abge­deckt ist, damit die beim Zünden des Lichtbogens entste­hende Plasmasäule nicht seitlich abgelenkt wird und da­durch mit Verzögerung zum Löschblechstapel 26 gelangt.It is essential for the effect of the arc steering that the contact point 14 is completely covered directly on the side, so that the plasma column which arises when the arc is ignited is not laterally deflected and thereby arrives at the stack of quenching plates 26 with a delay.

In Fig. 2 ist ebenfalls ein Ausschnitt eines Schalters ähnlich dem in Fig. 1 gezeigten, im Längsschnitt wieder­gegeben, bei dem jedoch die Kontakstelle 34 zwischen dem Festkontakt 36 und dem beweglichen Kontakt 38 eine ande­re Lage einnimmt. Das hier dargestellte Gehäuse 30 weist ebenfalls eine Vorkammer 32 auf, die von Vorkammerplat­ten 33 seitlich begrenzt ist.In Fig. 2 is also a section of a switch similar to that shown in Fig. 1, shown in longitudinal section, but in which the contact point 34 between the fixed contact 36 and the movable contact 38 occupies a different position. The housing 30 shown here also has a prechamber 32 which is laterally delimited by prechamber plates 33.

Gegenüber der in Fig. 1 gezeigten Ausgestaltung ist das feste Kontaktstück 36 hier mit der unteren Lichtbogen­leitschiene 44 verbunden, während das bewegliche Kon­taktstück 38 über eine Verbindungsleitung 37 mit der oberen Lichtbogenleitschiene 42 verbunden ist. Zur Fi­xierung der oberen Lichtbogenleitschiene 42 dient eine an die Gehäusewand 31 angeformte Halterung 40.Compared to the embodiment shown in FIG. 1, the fixed contact piece 36 is here connected to the lower arc guide rail 44, while the movable contact piece 38 is connected to the upper arc guide rail 42 via a connecting line 37. A bracket 40 formed on the housing wall 31 is used to fix the upper arc guide rail 42.

Wie bereits aus Fig. 1 bekannt, bilden auch hier die Lichtbogenleitschienen 42,44 die obere und untere Be­grenzung für einen dazwischen befindlichen Löschblech­stapel 46.As is already known from FIG. 1, the arc guide rails 42, 44 form the upper and lower limit for a stack of quenching plates 46 located between them.

Ebenso wie aus Fig. 1 bereits bekannt, ist auch hier die Vorkammerplatte 33 mit einer Öffnung 35 versehen, welche ebenfalls auf der Rückseite des beweglichen Kontakt­ stückes 38 so angeordnet ist, daß die Kontaktstelle 34 von der Seite her völlig geschlossen ist. Der Zweck die­ser Öffnung 35 in den Vorkammerplatten 33 ist der glei­che wie bereits in Fig. 1 beschrieben.1, the prechamber plate 33 is also provided with an opening 35, which is also on the back of the movable contact piece 38 is arranged so that the contact point 34 is completely closed from the side. The purpose of this opening 35 in the prechamber plates 33 is the same as already described in FIG. 1.

Die in Fig. 3 gezeigte Anordnung entspricht nahezu deckungsgleich der aus Fig. 1 bekannten Gestaltung eines Gehäuses 10 eines Schalters mit Vorkammer 12, so daß die in Fig. 1 gewählten Bezugsziffern auch hier Anwendung finden können.The arrangement shown in FIG. 3 corresponds almost congruently to the design of a housing 10 of a switch with prechamber 12 known from FIG. 1, so that the reference numbers selected in FIG. 1 can also be used here.

Abweichend von der aus Fig. 1 bekannten Anordnung ist die zusätzliche Einrichtung eines Steges 21, der das Festkontaktstück 16 horizontal überdeckt und in den Vor­kammerraum 12 hineinragt. Dieser Steg 21, der an die mit der Gehäusewand 11 verbundene Halterung 20 angeformt ist, verhindert eine der Bewegungsrichtung des Lichtbo­gens, welcher beim Öffnen der Kontaktstelle 14 zwischen den Kontaktstücken 16,18 auftritt, entgegengerichtetes Abströmen des dabei entstehenden Gasstroms.Deviating from the arrangement known from FIG. 1 is the additional arrangement of a web 21, which covers the fixed contact piece 16 horizontally and projects into the prechamber space 12. This web 21, which is molded onto the holder 20 connected to the housing wall 11, prevents the gas flow which arises from flowing out in the opposite direction to the direction of movement of the arc which occurs when the contact point 14 between the contact pieces 16, 18 is opened.

Durch diese besondere Ausgestaltung wird in vorteilhaf­ter Weise eine schnelle Aufweitug des Lichtbogens er­zielt. Hierbei ist von wesentlichem Einfluß, daß der im Gehäuse 20 angeformte Steg 21 so nahe wie möglich an der Kontaktstelle 14 liegt und dadurch die bei der Öffnung der Kontaktstelle 14 entstehende Druckwelle in Lichtbo­genlaufrichtung ausrichtet. Durch die hiermit verbundene schnellere Ausbildung des Plasmas in der gewünschten Richtung wird die Lichtbogenlaufgeschwindigkeit aus dem Kontaktbereich heraus deutlich erhöht. Damit verbunden ist eine deutlich geringere Belastung der Kontaktstelle 14.This special configuration advantageously achieves rapid expansion of the arc. It is essential that the web 21 formed in the housing 20 is as close as possible to the contact point 14 and thereby aligns the pressure wave which arises when the contact point 14 opens in the direction of the arc. The associated faster formation of the plasma in the desired direction significantly increases the speed of the arc out of the contact area. This is associated with a significantly lower load on the contact point 14.

Claims (6)

1. Löscheinrichtung für elektrische Schalter, ins­besondere Leistungs- und Leitungsschutzschalter, in ei­nem Gehäuse mit wenigstens einer von Vorkammerplatten seitlich begrenzten Vorkammer, in der ein dreh- oder schwenkbewegliches Kontaktstück und ein festes Kontakt­stück eine Kontaktstelle bilden, mit Lichtbogenleit­schienen, die jeweils von den Kontaktstücken zu einem Lichtbogen-Löschblechstapel führen, den sie zwischen sich nehmen, dadurch gekennzeichnet, daß die Vorkammer­platten (13,33) im Bereich der Kontaktstelle (14,34) ge­schlossen sind, daß aber im Bereich der Offenstellung des beweglichen Kontakstücks (18,38) in den Vorkammer­platten (13,33) Öffnungen (15,35) vorgesehen sind.1. extinguishing device for electrical switches, in particular circuit breakers and circuit breakers, in a housing with at least one prechamber laterally delimited by prechamber plates, in which a rotatable or pivotable contact piece and a fixed contact piece form a contact point, with arc guide rails, each of which is connected to the contact pieces lead an arc-quenching sheet stack that they take between them, characterized in that the prechamber plates (13, 33) are closed in the area of the contact point (14, 34), but in the area of the open position of the movable contact piece (18, 38) in the prechamber plates (13, 33) openings (15, 35) are provided. 2. Löscheinrichtung nach Anspruch 1, dadurch ge­kennzeichnet, daß die Öffnungen (15,35), die zum raschen Ausgleich von Unterdruck und zur Entionisierung an der Kontaktstelle (14,34) dienen, so angeordnet sind, daß das bewegliche Kontaktstück (18,38) sich beim Öffnen der Kontaktstelle (14,34) auf die Öffnungen (15,35) zube­wegt.2. Extinguishing device according to claim 1, characterized in that the openings (15,35), which serve for the rapid compensation of negative pressure and for deionization at the contact point (14.34), are arranged so that the movable contact piece (18.38 ) moves towards the openings (15.35) when the contact point (14.34) is opened. 3. Löscheinrichtung nach Anspruch 1, dadurch ge­kennzeichnet, daß das feste Kontaktstück (16,36) durch eine an das Gehäuse (10,30) angeformte Halterung fixiert ist, an welche ein Steg (21) anschließt, der die beim Öffnen der Kontakte (16,18,36,38) entstehenden Druckwel­le in Lichtbogenlaufrichtung ablenkt, was die Ausweitung des Lichtbogens in der gewünschten Richtung auf den Löschblechstapel (26,46) zu begünstigt und dadurch die Belastung der Kontakte (16,18,36,38) vermindert.3. extinguishing device according to claim 1, characterized in that the fixed contact piece (16,36) is fixed by a molded on the housing (10,30) bracket, to which a web (21) connects which the opening of the contacts ( 16, 18, 36, 38) deflects the resulting pressure wave in the direction of the arc, which favors the expansion of the arc in the desired direction onto the stack of quenching plates (26, 46) and thereby reduces the load on the contacts (16, 18, 36, 38). 4. Löscheinrichtung nach einem der vorherigen An­sprüche, dadurch gekennzeichnet, daß die erforderliche Kontaktfläche der Kontakte (16,18, 36,38) gegenüber den Kontaktflächen bei herkömmmlichen Kontakten verkleinert sind.4. Extinguishing device according to one of the preceding claims, characterized in that the required contact area of the contacts (16, 18, 36, 38) are reduced in relation to the contact areas in conventional contacts. 5. Löscheinrichtung nach einem der vorherigen An­sprüche, dadurch gekennzeichnet, daß die Öffnungen (15,35) in den Vorkammerplatten (13,33) symmetrisch an­geordnet sind.5. Extinguishing device according to one of the preceding claims, characterized in that the openings (15,35) in the prechamber plates (13,33) are arranged symmetrically. 6. Löscheinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Öffnungen (15,35) in den Vorkammerplatten (13,33) asymmetrisch angeordnet sind.6. Extinguishing device according to one of claims 1 to 4, characterized in that the openings (15,35) in the prechamber plates (13,33) are arranged asymmetrically.
EP87109027A 1986-06-27 1987-06-23 Quenching device for electric circuit breaker Expired - Lifetime EP0251160B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109027T ATE76536T1 (en) 1986-06-27 1987-06-23 EXTINGUISHING DEVICE FOR ELECTRICAL SWITCHES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863621690 DE3621690A1 (en) 1986-06-27 1986-06-27 DELETING DEVICE FOR ELECTRICAL SWITCHES
DE3621690 1986-06-27

Publications (3)

Publication Number Publication Date
EP0251160A2 true EP0251160A2 (en) 1988-01-07
EP0251160A3 EP0251160A3 (en) 1988-08-24
EP0251160B1 EP0251160B1 (en) 1992-05-20

Family

ID=6303906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109027A Expired - Lifetime EP0251160B1 (en) 1986-06-27 1987-06-23 Quenching device for electric circuit breaker

Country Status (3)

Country Link
EP (1) EP0251160B1 (en)
AT (1) ATE76536T1 (en)
DE (2) DE3621690A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0387761A2 (en) * 1989-03-13 1990-09-19 Licentia Patent-Verwaltungs-GmbH Automatic circuit breaker, particularly automatic cut-out
DE3908102A1 (en) * 1989-03-13 1990-09-20 Licentia Gmbh Automatic circuit breaker, especially a line protective circuit breaker
DE4007606A1 (en) * 1990-03-09 1991-09-12 Licentia Gmbh Automatic load protection switch
WO1995012888A1 (en) * 1993-11-02 1995-05-11 Felten & Guilleaume Austria Ag Switch
EP1693869A2 (en) * 2005-02-17 2006-08-23 ABB PATENT GmbH Electrical installation device with pre-arc chamber, pre-arc chamber plates and current limiting arc extinguishing device
EP1722384A3 (en) * 2005-05-13 2007-06-27 ABB PATENT GmbH Electrical installation device with an arc chute assembly and a current limiting arc extinguishing device
WO2007144016A1 (en) * 2006-06-12 2007-12-21 Ellenberger & Poensgen Gmbh Protection switch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19518051A1 (en) * 1995-05-17 1996-11-21 Abb Patent Gmbh Arc extinguishing device esp. for small modular switch devices e.g. circuit breakers
DE19518049A1 (en) * 1995-05-17 1996-11-21 Abb Patent Gmbh Arc extinguishing device esp. for small modular switch device e.g. circuit breaker
DE102005007299A1 (en) * 2005-02-17 2006-08-31 Abb Patent Gmbh Electrical installation equipment e.g. line circuit breaker, has main channel to receive and feed again leaking gas from outlet to inlet of arc quenching device for accelerating gas flow from point of origin of arc in direction of device
DE102005007302A1 (en) * 2005-02-17 2006-08-24 Abb Patent Gmbh Switching device, e.g. line circuit breaker, has recess covered with diaphragm that is made of elastic material and in housing wall in area of electric arc-antechamber area, such that diaphragm extends in area
DE102007053636B3 (en) * 2007-11-08 2009-04-09 Abb Ag Electrical installation equipment e.g. circuit breaker, has opening receiving permanent magnet for producing alternating current or direct current glass device supporting arc guide during alternating current and direct current operations

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EP0028013A1 (en) * 1979-10-27 1981-05-06 Fuji Electric Co. Ltd. Power circuit breaker provided with a casing
EP0143982A1 (en) * 1983-10-29 1985-06-12 Sursum Elektrizitätsgesellschaft Leyhausen GmbH &amp; Co. Circuit breaker with an arc blow-out field
EP0148058A2 (en) * 1983-12-26 1985-07-10 Merlin Gerin Miniature circuit breaker with improved dielectric characteristics
EP0158124A2 (en) * 1984-04-11 1985-10-16 Asea Brown Boveri Aktiengesellschaft Arc-extinguishing device for electrical switches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028013A1 (en) * 1979-10-27 1981-05-06 Fuji Electric Co. Ltd. Power circuit breaker provided with a casing
EP0143982A1 (en) * 1983-10-29 1985-06-12 Sursum Elektrizitätsgesellschaft Leyhausen GmbH &amp; Co. Circuit breaker with an arc blow-out field
EP0148058A2 (en) * 1983-12-26 1985-07-10 Merlin Gerin Miniature circuit breaker with improved dielectric characteristics
EP0158124A2 (en) * 1984-04-11 1985-10-16 Asea Brown Boveri Aktiengesellschaft Arc-extinguishing device for electrical switches

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0387761A2 (en) * 1989-03-13 1990-09-19 Licentia Patent-Verwaltungs-GmbH Automatic circuit breaker, particularly automatic cut-out
DE3908102A1 (en) * 1989-03-13 1990-09-20 Licentia Gmbh Automatic circuit breaker, especially a line protective circuit breaker
EP0387761A3 (en) * 1989-03-13 1992-01-29 Licentia Patent-Verwaltungs-GmbH Automatic circuit breaker, particularly automatic cut-out
DE4007606A1 (en) * 1990-03-09 1991-09-12 Licentia Gmbh Automatic load protection switch
AT410725B (en) * 1993-11-02 2003-07-25 Felten & Guilleaume Ag Oester SELF-SWITCH
AU676934B2 (en) * 1993-11-02 1997-03-27 Felten & Guilleaume Austria Ag Switch
WO1995012888A1 (en) * 1993-11-02 1995-05-11 Felten & Guilleaume Austria Ag Switch
EP1693869A2 (en) * 2005-02-17 2006-08-23 ABB PATENT GmbH Electrical installation device with pre-arc chamber, pre-arc chamber plates and current limiting arc extinguishing device
US7259646B2 (en) * 2005-02-17 2007-08-21 Abb Patent Gmbh Electrical service device having an arc prechamber area, prechamber plates and a current-limiting arc-quenching device
EP1693869A3 (en) * 2005-02-17 2009-01-07 ABB PATENT GmbH Electrical installation device with pre-arc chamber, pre-arc chamber plates and current limiting arc extinguishing device
EP1722384A3 (en) * 2005-05-13 2007-06-27 ABB PATENT GmbH Electrical installation device with an arc chute assembly and a current limiting arc extinguishing device
WO2007144016A1 (en) * 2006-06-12 2007-12-21 Ellenberger & Poensgen Gmbh Protection switch
US7834290B2 (en) 2006-06-12 2010-11-16 Ellenberger & Poensgen Gmbh Protection switch
CN101461021B (en) * 2006-06-12 2011-08-31 埃伦贝格尔及珀恩斯根有限公司 Protection switch

Also Published As

Publication number Publication date
DE3621690A1 (en) 1988-01-14
EP0251160A3 (en) 1988-08-24
ATE76536T1 (en) 1992-06-15
DE3779188D1 (en) 1992-06-25
EP0251160B1 (en) 1992-05-20

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