EP1463075B1 - Stack of arc extinguishing blades for an electrical switch, in particular for an electrical circuit breaker - Google Patents

Stack of arc extinguishing blades for an electrical switch, in particular for an electrical circuit breaker Download PDF

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Publication number
EP1463075B1
EP1463075B1 EP20040004614 EP04004614A EP1463075B1 EP 1463075 B1 EP1463075 B1 EP 1463075B1 EP 20040004614 EP20040004614 EP 20040004614 EP 04004614 A EP04004614 A EP 04004614A EP 1463075 B1 EP1463075 B1 EP 1463075B1
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EP
European Patent Office
Prior art keywords
arc quenching
arc
plates
quenching plate
stack
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EP20040004614
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German (de)
French (fr)
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EP1463075A3 (en
EP1463075A2 (en
Inventor
Wolfgang Dipl.-Ing. Pump
Wolfgang Dipl.-Ing. Süss
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ABB AG Germany
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ABB AG Germany
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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
    • H01H9/36—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc chamber

Definitions

  • the invention relates to an arc-quenching plate assembly according to the preamble of claim 1.
  • Such arc-quenching sheet assembly also called arc splitter stack, is housed in a circuit breaker or a motor protection switch.
  • the arc splitter stack is composed of a plurality of arc quenching plates, which are identical.
  • the sheets are rectangular and made of metal and have a V-shaped inlet contour, which is open to the arc creation point.
  • the individual quenching plates are held together by means arranged on both sides on their longitudinal sides strips of insulating material to the package together and adjusted to mutual distance.
  • the arc is arc guide rails that limit the quench stack on both sides in the stacking direction, fed into the arc splitter stack and there in partial arcs divided, whereby the arc voltage is increased and the short-circuit current thereby limited.
  • arc splitter stacks are for example from the DE 36 30 447 known.
  • the arc splitter stack borders in its seen in the arc running direction rear end of a wall of insulating material having grooves, engage in the trailing edges of the quenching plates.
  • the maximum number of splitter plates is determined by the installation height, whereby the splitter plate thickness and the distance between the plates has an influence. Since the installation height and the maximum possible number of sheets plate is responsible for the size of the resulting arc voltage and thus for the possible limitation of the short-circuit current at the inlet of the arc in this quenching chamber, one strives to accommodate as many arc quenching in an arc extinguishing chamber, in practice, a sheet thickness 0.6 mm due to the thermal resistance and a distance of the plates from each other of 0.6 mm can not be fallen below and falls below these values does not lead to an increase in the arc voltage. Thus, the maximum achievable arc voltage is determined geometrically for a certain installation height for these physical reasons.
  • the GB 1 107 976 shows an arc splitter assembly comprising an array of quench plates, alternately made of two types of quenching plates of different lengths, having a fixed frame comprising end walls and side walls.
  • a comb-like structured plate To hold the short quenching plates is a comb-like structured plate, which is held at a position defined by openings in the side walls. The position of the plate is matched to the length of the short quenching plates.
  • the object of the invention is, with the same geometric dimensions, d. H. at the same installation height of the splitter stack to achieve a higher arc voltage and thus a better limitation of the short-circuit current, the arc extinguishing arrangement should be easy and flexible to manufacture.
  • the arc splitter stack has first arc quenching plates of a first length and second arc quenching plates of a shorter first length compared to the first; the arc extinguishing plates with a shorter length are each arranged between two sheets of the first length, wherein the trailing edges of both arc splitter stacks lie parallel to each other in a direction perpendicular to the arc running direction plane.
  • the first quenching plates are assembled by means of two strips of insulating material to form a first arc splitter stack and the second plates are assembled by means of further strips of insulating material to form a second arc splitter stack.
  • Both arcing plate stacks or packages are inserted into one another such that the stack with the second quenching plates is inserted from behind into the first stack, wherein means are provided after insertion of the two packages into each other in order to keep the first and second quenching plates at a distance and against each other to position.
  • the arc quenching plate with a first length as the first plate and the arc splitter plate with the second length shall be referred to as the second plate.
  • the first sheets extend over the entire length of the arc quenching chamber or the splitter stack, while the inserted second sheets measure approximately between 30% to 50% of this length. Both quenching plates have a similar V-shaped inlet contour.
  • the short quenching plates may have a thickness which is equal to or slightly less than that of the first quenching plates.
  • the arc enters the first arc stack, in which the individual sheets have a large distance; this shrinkage is faster than in the usual splitter stack, because the distance between two quenching plates is greater than the distance in arc splitter stacks according to the prior art. Due to the larger splitter spacing in the front area and the flow resistance before the arc is lower, thereby increasing the inlet velocity. Thus, a good current limit is already achieved in the front package area by the driving voltage opposing, rapidly increasing arc voltage. The arc is cooled and the short-circuit current drops.
  • the arc quencher stack 10 shown there has first arc quenching plates 11 and second arc quenching plates 12.
  • the arc extinguishing plates 11 are elongated rectangular and have in the usual way in its front region a V-shaped cutout 6, which may be referred to as inlet recess.
  • the individual arc quenching plates 11 have a first length a and take a first distance D 1 from each other.
  • the first quenching plates 11 are held on both sides by strips 14 and 15 of insulating material, preferably made of insulating paper, at a distance from each other.
  • a second stack with second quenching plates 12 is inserted, which have the same distance D 1 from each other, but may be slightly thinner than the sheets 11 of the first stack.
  • These arc quenching plates 12 have in their front region also a V-shaped cutout 5 as an inlet recess and on their parallel to the arc running direction edges two transversely projecting pins 22, 23, in each adapted openings each having a further strip 24 of electrically insulating material, preferably engage from insulating paper, so that the quenching plates are held in the same manner as the quenching plates 11 at a distance to each other, in which case only one strip 24 is shown.
  • the length a of the first sheets 11 is greater than the length b of the second quenching plates 12, wherein the length b is between 30% to 50% of the length a.
  • Fig. 1 It can be seen that at the front in the arc running direction longitudinal edges of the two strips 24 groove-like recesses 25 are provided which engage behind transverse edges 26 of the first plates 11 so that the second splitter stack is positioned opposite the first splitter stack.
  • the transverse edges 26 are perpendicular to the arc running direction, so that thereby a kind of gradation is formed, over which the arcuate direction seen front area of the first arc quenching plates 11 merges into a narrower area, so that the two strips 24th of insulating material lie approximately in the planes in which the strips 14, 15 are located.
  • a further fixation of the second arc splitter stack is achieved by suitable strips or projections on the housing inner wall of the switching device, in which the arc quenching plate assembly is to be used.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Description

Die Erfindung betrifft eine Lichtbogenlöschblechanordnung nach dem Oberbegriff des Anspruches 1.The invention relates to an arc-quenching plate assembly according to the preamble of claim 1.

Eine solche Lichtbogenlöschblechanordnung, auch Lichtbogenlöschblechpaket genannt, ist in einem Leitungsschutzschalter oder einem Motorschutzschalter untergebracht. Das Lichtbogenlöschblechpaket setzt sich zusammen aus mehreren Lichtbogenlöschblechen, die identisch ausgebildet sind. Die Bleche sind rechteckig und bestehen aus Metall und besitzen eine V-förmige Einlaufkontur, die zur Lichtbogenentstehungsstelle offen ist. Die einzelnen Löschbleche werden mittels beidseitig an ihren Längsseiten angeordneter Streifen aus Isoliermaterial zum Paket zusammen gehalten und auf gegenseitigen Abstand eingestellt.Such arc-quenching sheet assembly, also called arc splitter stack, is housed in a circuit breaker or a motor protection switch. The arc splitter stack is composed of a plurality of arc quenching plates, which are identical. The sheets are rectangular and made of metal and have a V-shaped inlet contour, which is open to the arc creation point. The individual quenching plates are held together by means arranged on both sides on their longitudinal sides strips of insulating material to the package together and adjusted to mutual distance.

Wenn nun ein Lichtbogen zwischen einem beweglichen Kontaktstück und einem feststehenden Kontaktstück beispielsweise bei einem Kurzschlussstrom gezogen wird, so wird der Lichtbogen über Lichtbogenleitschienen, die den Löschblechstapel beidseitig in Stapelrichtung begrenzen, in das Lichtbogenlöschblechpaket geführt und dort in Teillichtbögen unterteilt, wodurch die Lichtbogenspannung erhöht und der Kurzschlussstrom dadurch begrenzt werden. Solche Lichtbogenlöschblechpakete sind z.B. aus der DE 36 30 447 bekannt geworden. Dabei grenzt das Lichtbogenlöschblechpaket in seinem in Lichtbogenlaufrichtung gesehen hinteren Ende an eine Wand aus Isoliermaterial, die Rillen aufweist, in die Hinterkanten der Löschbleche eingreifen.If now an arc between a movable contact piece and a fixed contact piece is pulled, for example, in a short-circuit current, the arc is arc guide rails that limit the quench stack on both sides in the stacking direction, fed into the arc splitter stack and there in partial arcs divided, whereby the arc voltage is increased and the short-circuit current thereby limited. Such arc splitter stacks are for example from the DE 36 30 447 known. In this case, the arc splitter stack borders in its seen in the arc running direction rear end of a wall of insulating material having grooves, engage in the trailing edges of the quenching plates.

Darüber hinaus ist bekannt, siehe EP 0 617 836 , hinter der Lichtbogenlöschkammer bzw. hinter dem Lichtbogenlöschblechpaket Rippen und Vorsprünge aus Isolierstoff anzuordnen, die eine zusätzliche Kühlung der Lichtbogengase bewirken sollen.In addition, it is known, see EP 0 617 836 , Arranged behind the arc extinguishing chamber or behind the arc splitter stack ribs and protrusions of insulating material, which should cause additional cooling of the arc gases.

Die maximal mögliche Löschblechanzahl ist dabei durch die Einbauhöhe bestimmt, wobei die Löschblechdicke und der Abstand zwischen den Blechen Einfluss hat. Da die Einbauhöhe und die maximal mögliche Löschblechanzahl verantwortlich ist für die Größe der resultierenden Lichtbogenspannung und damit für die mögliche Begrenzung des Kurzschlussstromes beim Einlauf des Lichtbogens in diese Löschkammer, ist man bestrebt, möglichst viele Lichtbogenlöschbleche in einer Lichtbogenlöschkammer unterzubringen, wobei in der Praxis eine Blechdicke von 0,6mm aufgrund der thermischen Festigkeit und ein Abstand der Bleche untereinander von 0,6mm nicht unterschritten werden kann und eine Unterschreitung dieser Werte auch nicht zur Erhöhung der Lichtbogenspannung führt. Damit ist aus diesen physikalischen Gründen für eine bestimmte Einbauhöhe die maximal erreichbare Lichtbogenspannung geometrisch festgelegt.The maximum number of splitter plates is determined by the installation height, whereby the splitter plate thickness and the distance between the plates has an influence. Since the installation height and the maximum possible number of sheets plate is responsible for the size of the resulting arc voltage and thus for the possible limitation of the short-circuit current at the inlet of the arc in this quenching chamber, one strives to accommodate as many arc quenching in an arc extinguishing chamber, in practice, a sheet thickness 0.6 mm due to the thermal resistance and a distance of the plates from each other of 0.6 mm can not be fallen below and falls below these values does not lead to an increase in the arc voltage. Thus, the maximum achievable arc voltage is determined geometrically for a certain installation height for these physical reasons.

Die GB 1 107 976 zeigt eine Löschblechanordnung umfassend eine Anordnung von Löschblechen, alternierend aus zwei Arten von Löschblechen unterschiedlicher Länge, die einen festgefügten Rahmen hat, der End-Wände und Seitenwände umfasst. Zur Halterung der kurzen Löschbleche dient eine kammartig strukturierte Platte, die an einer durch Öffnungen in den Seitenwänden festgelegten Position gehalten ist. Die Position der Platte ist dabei auf die Länge der kurzen Löschbleche abgestimmt.The GB 1 107 976 shows an arc splitter assembly comprising an array of quench plates, alternately made of two types of quenching plates of different lengths, having a fixed frame comprising end walls and side walls. To hold the short quenching plates is a comb-like structured plate, which is held at a position defined by openings in the side walls. The position of the plate is matched to the length of the short quenching plates.

Aufgabe der Erfindung ist es, bei gleichen geometrischen Abmessungen, d. h. bei gleicher Einbauhöhe des Löschblechpaketes eine höhere Lichtbogenspannung und damit eine bessere Begrenzung des Kurzschlussstromes zu erreichen, wobei die Lichtbogenlöschanordnung einfach und flexibel zu fertigen sein soll.The object of the invention is, with the same geometric dimensions, d. H. at the same installation height of the splitter stack to achieve a higher arc voltage and thus a better limitation of the short-circuit current, the arc extinguishing arrangement should be easy and flexible to manufacture.

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

Danach besitzt das Lichtbogenlöschblechpaket erste Lichtbogenlöschbleche einer ersten Länge und zweite Lichtbogenlöschbleche einer gegenüber der Ersten kürzeren zweiten Länge; die Lichtbogenlöschbleche mit kürzerer Länge sind jeweils zwischen zwei Blechen der ersten Länge angeordnet, wobei die Hinterkanten beider Löschblechpakete parallel zueinander in einer senkrecht zur Lichtbogenlaufrichtung verlaufenden Ebene liegen. Die ersten Löschbleche sind mittels zweier Streifen aus Isoliermaterial zu einem ersten Lichtbogenlöschblechpaket zusammengesetzt und die zweiten Bleche sind mittels weiterer Streifen aus Isoliermaterial zu einem zweiten Lichtbogenlöschblechpaket zusammengesetzt. Beide Lichtbogenlöschblechstapel oder -pakete werden so ineinander gefügt, dass der Stapel mit den zweiten Löschblechen von hinten in den ersten Stapel eingefügt wird, wobei nach dem Einschieben der beiden Pakete ineinander Mittel vorgesehen sind, um die ersten und zweiten Löschbleche auf Abstand zu halten und gegeneinander zu positionieren.Thereafter, the arc splitter stack has first arc quenching plates of a first length and second arc quenching plates of a shorter first length compared to the first; the arc extinguishing plates with a shorter length are each arranged between two sheets of the first length, wherein the trailing edges of both arc splitter stacks lie parallel to each other in a direction perpendicular to the arc running direction plane. The first quenching plates are assembled by means of two strips of insulating material to form a first arc splitter stack and the second plates are assembled by means of further strips of insulating material to form a second arc splitter stack. Both arcing plate stacks or packages are inserted into one another such that the stack with the second quenching plates is inserted from behind into the first stack, wherein means are provided after insertion of the two packages into each other in order to keep the first and second quenching plates at a distance and against each other to position.

Im Folgenden soll das Lichtbogenlöschblech mit einer ersten Länge als erstes Blech und das Lichtbogenlöschblech mit der zweiten Länge als zweites Blech bezeichnet werden.In the following, the arc quenching plate with a first length as the first plate and the arc splitter plate with the second length shall be referred to as the second plate.

Die ersten Bleche verlaufen über die gesamte Länge der Lichtbogenlöschkammer bzw. des Löschblechpaketes, während die eingeschobenen zweiten Bleche etwa zwischen 30% bis 50% dieser Länge messen. Beide Löschbleche weisen eine ähnliche V-förmige Einlaufkontur auf.The first sheets extend over the entire length of the arc quenching chamber or the splitter stack, while the inserted second sheets measure approximately between 30% to 50% of this length. Both quenching plates have a similar V-shaped inlet contour.

Gegebenenfalls können die kurzen Löschbleche eine Dicke aufweisen, die gleich oder geringfügig geringer ist als die der ersten Löschbleche.Optionally, the short quenching plates may have a thickness which is equal to or slightly less than that of the first quenching plates.

Zur Fixierung der beiden Lichtbogenlöschblechpakete gegeneinander besitzen die Streifen aus Isoliermaterial für das zweite Lichtbogenlöschblechpaket an ihrer zur Lichtbogenentstehungsstelle hinweisenden Kante Aussparungen, in die an den Lichtbogenlöschblechen des ersten Lichtbogenlöschblechpaketes angeformte Querkanten eingreifen; eine weitere Fixierung erfolgt dann durch Anformungen am an den Innenwänden des Schaltergehäuses, zwischen denen sich das zweite Lichtbogenlöschblechpaket befindet.For fixing the two arc splitter stacks against each other, the strips of insulating material for the second arc splitter stack at their pointing to the arc creation point edge recesses into which engage the arc splitter plates of the first arc splitter stack formed transverse edges; a further fixation then takes place by formations on the inner walls of the switch housing, between which the second arc splitter stack is.

Die Wirkungsweise dieser Anordnung ist wie folgt:The operation of this arrangement is as follows:

Zunächst läuft der Lichtbogen in den ersten Löschblechstapel ein, bei dem die einzelnen Bleche einen großen Abstand besitzen; dieses Einlaufen erfolgt schneller als bei den üblichen Löschblechpaketen, weil der Abstand zwischen zwei Löschblechen größer ist als der Abstand in Lichtbogenlöschblechpaketen gemäß dem Stand der Technik. Aufgrund des größeren Löschblechabstandes im vorderen Bereich ist auch der Strömungswiderstand vor dem Lichtbogen geringer, wodurch sich die Einlaufgeschwindigkeit vergrößert. Damit wird bereits im vorderen Paketbereich eine gute Strombegrenzung durch die der treibenden Spannung entgegengerichtete, schnell ansteigende Lichtbogenspannung erreicht. Der Lichtbogen wird dabei gekühlt und der Kurzschlussstrom sinkt. Bei Auftreffen des Lichtbogens auf den zweiten Stapel im hinteren Bereich des Lichtbogenlöschblechpaketes erfolgt eine nochmalige Unterteilung der Teillichtbögen in fast die doppelte Anzahl, wodurch die Lichtbogenspannung auf einen Wert weit über der treibenden Netzspannung ansteigt und der Lichtbogen schlagartig zum Verlöschen gebracht wird. Dadurch wird auch die thermische Belastung der im hinteren Bereich eingeschobenen, gegebenenfalls dünneren Bleche ausreichend gering gehalten.First, the arc enters the first arc stack, in which the individual sheets have a large distance; this shrinkage is faster than in the usual splitter stack, because the distance between two quenching plates is greater than the distance in arc splitter stacks according to the prior art. Due to the larger splitter spacing in the front area and the flow resistance before the arc is lower, thereby increasing the inlet velocity. Thus, a good current limit is already achieved in the front package area by the driving voltage opposing, rapidly increasing arc voltage. The arc is cooled and the short-circuit current drops. Upon impact of the arc on the second stack in the rear of the arc splitter stack a subdivision of the partial arcs in almost twice the number, whereby the arc voltage rises to a value well above the driving mains voltage and the arc is suddenly brought to extinguish. As a result, the thermal load of the inserted at the rear, possibly thinner sheets is kept sufficiently low.

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

Es zeigen:

Fig. 1
eine Seitenansicht auf einen erfindungsgemäßen Lichtbogenlöschblechstapel,
Fig. 2
eine Aufsicht auf den Löschblechstapel gemäß Fig. 1 und
Fig. 3
eine perspektivische Ansicht des Stapels gemäß den Fig. 1 und 2.
Show it:
Fig. 1
a side view of an arc splitter stack according to the invention,
Fig. 2
a view of the splitter stack according to Fig. 1 and
Fig. 3
a perspective view of the stack according to the Fig. 1 and 2 ,

Es sei nun Bezug auf die Fig. 3. Der dort dargestellte Lichtbogenlöschblechstapel 10 weist erste Lichtbogenlöschbleche 11 und zweite Lichtbogenlöschbleche 12 auf. Die Lichtbogenlöschbleche 11 sind langgestreckt rechteckig und besitzen in üblicher Weise in ihrem vorderen Bereich einen V-förmigen Ausschnitt 6, der als Einlaufaussparung bezeichnet sein kann. Die einzelnen Lichtbogenlöschbleche 11 besitzen eine erste Länge a und nehmen einen ersten Abstand D1 voneinander ein. Die ersten Löschbleche 11 sind mittels beidseitig angeordneter Streifen 14 und 15 aus isolierendem Material, vorzugsweise aus Isolierpapier, auf Abstand zueinander gehalten. Dabei weist jedes Löschblech 11 an seiner längeren Längskante Aussparungen 16, 17 auf, in denen sich quer zur Längserstreckung der ersten Bleche vorspringende Zapfen 18, 19, 20 befinden, wobei bei einem Löschblech beidseitig je zwei Zapfen 18 und 19 und bei dem benachbarten Löschblech beidseitig je ein Zapfen 20 angeformt sind; Löschbleche mit je zwei Zapfen wechseln somit mit Löschblechen mit je einem Zapfen ab.It is now related to the Fig. 3 , The arc quencher stack 10 shown there has first arc quenching plates 11 and second arc quenching plates 12. The arc extinguishing plates 11 are elongated rectangular and have in the usual way in its front region a V-shaped cutout 6, which may be referred to as inlet recess. The individual arc quenching plates 11 have a first length a and take a first distance D 1 from each other. The first quenching plates 11 are held on both sides by strips 14 and 15 of insulating material, preferably made of insulating paper, at a distance from each other. In this case, each quenching plate 11 at its longer longitudinal edge recesses 16, 17, in which transversely to the longitudinal extent of the first plates projecting pins 18, 19, 20 are located in a splitter plate on both sides two pins 18 and 19 and the adjacent splitter plate on both sides each pin 20 are formed; Flush plates with two pins thus alternate with quenching plates, each with a pin.

In diesen ersten Stapel mit den ersten Löschblechen 11 ist ein zweiter Stapel mit zweiten Löschblechen 12 eingefügt, die den gleichen Abstand D1 voneinander besitzen, gegebenenfalls aber geringfügig dünner sind als die Bleche 11 des ersten Stapels. Diese Lichtbogenlöschbleche 12 besitzen in ihrem vorderen Bereich ebenfalls einen V-förmigen Ausschnitt 5 als Einlaufaussparung und auf ihren parallel zur Lichtbogenlaufrichtung verlaufenden Kanten zwei quer dazu vorspringende Zapfen 22, 23, die in daran angepasste Öffnungen je eines weiteren Streifens 24 aus elektrisch isolierendem Material, vorzugsweise aus Isolierpapier eingreifen, so dass die Löschbleche in gleicher Weise wie die Löschbleche 11 auf Abstand zueinander gehalten sind, wobei hier nur ein Streifen 24 dargestellt ist.In this first stack with the first quenching plates 11, a second stack with second quenching plates 12 is inserted, which have the same distance D 1 from each other, but may be slightly thinner than the sheets 11 of the first stack. These arc quenching plates 12 have in their front region also a V-shaped cutout 5 as an inlet recess and on their parallel to the arc running direction edges two transversely projecting pins 22, 23, in each adapted openings each having a further strip 24 of electrically insulating material, preferably engage from insulating paper, so that the quenching plates are held in the same manner as the quenching plates 11 at a distance to each other, in which case only one strip 24 is shown.

Wie aus Fig. 2 ersichtlich ist, ist die Länge a der ersten Bleche 11 größer als die Länge b der zweiten Löschbleche 12, wobei die Länge b zwischen 30% bis 50% der Länge a beträgt.How out Fig. 2 it can be seen, the length a of the first sheets 11 is greater than the length b of the second quenching plates 12, wherein the length b is between 30% to 50% of the length a.

Aus Fig. 1 ist ersichtlich, dass an den in Lichtbogenlaufrichtung vorderen Längskanten der beiden Streifen 24 nutenartige Aussparungen 25 vorgesehen sind, die hinter Querkanten 26 der ersten Bleche 11 so eingreifen, wodurch das zweite Löschblechpaket gegenüber dem ersten Löschblechpaket positioniert ist. Dabei verlaufen die Querkanten 26 senkrecht zur Lichtbogenlaufrichtung, so dass dadurch eine Art Stufung gebildet ist, über die der in Lichtbogenlaufrichtung gesehen vordere Bereich der ersten Lichtbogenlöschbleche 11 in einen schmaleren Bereich übergeht, so dass die beiden Streifen 24 aus isolierendem Material etwa in den Ebenen liegen, in denen sich die Streifen 14, 15 befinden. Eine weitere Fixierung des zweiten Lichtbogenlöschblechpaketes wird durch geeignete Leisten oder Vorsprünge an der Gehäuseinnenwand des Schaltgerätes, in das die Lichtbogenlöschblechanordnung eingesetzt werden soll, erreicht.Out Fig. 1 It can be seen that at the front in the arc running direction longitudinal edges of the two strips 24 groove-like recesses 25 are provided which engage behind transverse edges 26 of the first plates 11 so that the second splitter stack is positioned opposite the first splitter stack. In this case, the transverse edges 26 are perpendicular to the arc running direction, so that thereby a kind of gradation is formed, over which the arcuate direction seen front area of the first arc quenching plates 11 merges into a narrower area, so that the two strips 24th of insulating material lie approximately in the planes in which the strips 14, 15 are located. A further fixation of the second arc splitter stack is achieved by suitable strips or projections on the housing inner wall of the switching device, in which the arc quenching plate assembly is to be used.

Claims (6)

  1. An arc quenching plate arrangement for an electrical switch, especially a miniature circuit breaker or motor circuit breaker, comprising arc quenching plates (11) which are arranged parallel with respect to each other, which are held at a distance from each other by means of at least one holding device made of insulating material and which comprise one respective recess (6) shaped in an approximately V-like manner towards the point of arc origination, with the arc quenching plate arrangement comprising first arc quenching plates (11) of a first length (a) and second arc quenching plates (12) of a second length (b) which is shorter in comparison with the first ones, and with the shorter arc quenching plates (12) respectively being arranged between two first arc quenching plates (11), with the rear edges of the first and second arc quenching plates (11, 12) being disposed parallel with respect to each other in a plane extending perpendicularly to the running direction of the arc, characterized in that the first arc quenching plates (11) and the second arc quenching plates (12) are kept at a distance from one another by means of two (14, 15; 24) strips of insulating material, so that two arc quenching plate stacks are formed and the first arc quenching plate stack can be produced independent from the second arc quenching plate stack.
  2. An arc quenching plate arrangement according to claim 1, characterized in that the second length (b) is between 30% and up to 50% of the first length (a).
  3. An arc quenching plate arrangement according to one of the preceding claims, characterized in that the strips (24) made of insulating material for the second arc quenching plate stack comprise groove-like recesses (25) on its edge facing the point of arc origination, in which transverse edges (26) of the first arc quenching plate stack engage, so that thereby the two arc quenching plate stacks are positioned with respect to each other.
  4. An arc quenching plate arrangement according to claim 3, characterized in that the transverse edges (26) are formed by stepping, so that the rear region of the first arc quenching plates has a low width in comparison with the front region of the first arc quenching plates, with the insulating strips (14, 15) of the first arc quenching plate stack being disposed approximately in the plane of the strips (24) of insulating material for the second arc quenching plate stack.
  5. An arc quenching plate arrangement according to one of the preceding claims, characterized in that two pins (22) protruding transversely to the running direction of the arc are formed on the edges of the second arc quenching plate stacks (12) extending parallel to the running direction of the arc, which pins engage into respective openings of the insulating strips (24).
  6. An arc quenching plate arrangement according to one of the preceding claims, characterized in that the arc quenching plates (12) of the second arc quenching plate stack have a similar or slightly lower thickness than the first arc quenching plates (11).
EP20040004614 2003-03-22 2004-02-28 Stack of arc extinguishing blades for an electrical switch, in particular for an electrical circuit breaker Expired - Lifetime EP1463075B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003112820 DE10312820B4 (en) 2003-03-22 2003-03-22 Arc quenching plate assembly for an electrical switch, in particular an electrical circuit breaker
DE10312820 2003-03-22

Publications (3)

Publication Number Publication Date
EP1463075A2 EP1463075A2 (en) 2004-09-29
EP1463075A3 EP1463075A3 (en) 2006-04-19
EP1463075B1 true EP1463075B1 (en) 2012-07-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040004614 Expired - Lifetime EP1463075B1 (en) 2003-03-22 2004-02-28 Stack of arc extinguishing blades for an electrical switch, in particular for an electrical circuit breaker

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EP (1) EP1463075B1 (en)
DE (1) DE10312820B4 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006054030B4 (en) * 2006-11-16 2010-06-17 Abb Ag Electrical switching device
DE102007005996B4 (en) 2007-02-07 2009-01-02 Abb Ag Arc splitter arrangement
DE102008021138A1 (en) 2007-04-28 2008-10-30 Abb Ag Electric arc extinguishing plate arrangement for use in e.g. circuit breaker, has electric arc extinguishing plates held by rib at distance to each other, where rib is projected from box broad side to box interior
DE102008021025A1 (en) 2007-04-28 2008-10-30 Abb Ag Electric arc extinguishing plate arrangement for e.g. selective main input breaker, has extinguishing plates arranged in two groups, where distance of respective plate of one group is larger than that of respective plate of another group
DE102008017868B3 (en) 2008-04-09 2009-12-24 Abb Ag Arc extinguishing plate assembly for an electrical switch
JP5313933B2 (en) * 2010-01-18 2013-10-09 三菱電機株式会社 Circuit breaker
DE102010027392B3 (en) * 2010-07-05 2012-02-09 Abb Ag Arc extinguish assembly for mounting switch device e.g. line protection switch, has extinguish plates arranged between conductive plates, where thickness of one of plates is greater than thickness of other plate
CN102315031A (en) * 2010-07-05 2012-01-11 Abb股份公司 Arc quenching plate is arranged
KR101094775B1 (en) 2010-07-06 2011-12-16 엘에스산전 주식회사 Arc extinguishing mechanism for circuit breaker
DE102012110409A1 (en) 2012-10-31 2014-04-30 Eaton Electrical Ip Gmbh & Co. Kg Cooling device for gases occurring in installation devices

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US1963643A (en) * 1933-02-23 1934-06-19 Westinghouse Electric & Mfg Co Circuit interrupter
US2147419A (en) * 1935-06-19 1939-02-14 Westinghouse Electric & Mfg Co Circuit interrupter
US3126464A (en) * 1960-06-16 1964-03-24 Stettner
GB1107976A (en) 1966-03-18 1968-03-27 Ottermill Switchgear Ltd Improvements relating to arc chutes
DE2410049C3 (en) * 1974-03-02 1981-04-23 Brown, Boveri & Cie Ag, 6800 Mannheim Device for extinguishing high short-circuit alternating and direct currents in deionized sheet metal chambers
GB2084402B (en) * 1980-09-17 1984-05-02 Gec Elliott Automation Ltd Circuit breaker arc chute
US4485283A (en) * 1982-08-27 1984-11-27 General Electric Company Current limiter unit
DE3630447A1 (en) * 1986-09-06 1988-03-10 Bbc Brown Boveri & Cie ARC EXTINGUISHING DEVICE
DE9115905U1 (en) * 1991-12-21 1993-04-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit breaker with an arc chamber

Also Published As

Publication number Publication date
DE10312820A1 (en) 2004-09-30
EP1463075A3 (en) 2006-04-19
EP1463075A2 (en) 2004-09-29
DE10312820B4 (en) 2012-04-19

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