EP2378532B1 - Arc extinguishing device - Google Patents

Arc extinguishing device Download PDF

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Publication number
EP2378532B1
EP2378532B1 EP11162426.8A EP11162426A EP2378532B1 EP 2378532 B1 EP2378532 B1 EP 2378532B1 EP 11162426 A EP11162426 A EP 11162426A EP 2378532 B1 EP2378532 B1 EP 2378532B1
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EP
European Patent Office
Prior art keywords
contact piece
movable contact
plates
extinguishing
geometry
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EP11162426.8A
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German (de)
French (fr)
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EP2378532A1 (en
Inventor
Karsten Gerving
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Eaton Electrical IP GmbH and Co KG
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Eaton Electrical IP GmbH and Co KG
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Priority to PL11162426T priority Critical patent/PL2378532T3/en
Publication of EP2378532A1 publication Critical patent/EP2378532A1/en
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Publication of EP2378532B1 publication Critical patent/EP2378532B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc 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
    • H01H9/36—Metal parts
    • H01H2009/365—Metal parts using U-shaped plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/002—Details of electromagnetic relays particular to three-phase electromagnetic relays

Definitions

  • the invention relates to single or multi-pole low-voltage switchgear, such as circuit breakers or contactors, with a contactor of an arc quenching device.
  • an arc quenching device which consists of several, combined into a splitter stack quenching plates, which are stacked between lateral brackets spaced.
  • the flat surfaces having quenching plates are made of ferromagnetic material and are equipped with a nose-shaped, usually centrally located cutout.
  • the quenching plates usually have a material thickness of 0.5 to 3 mm. In the case of the creation of an arc, it is extinguished by being driven by the resulting magnetic forces into the system of quenching plates. In these arc quenching devices, the arc is divided into relatively short partial arcs.
  • the contact with the cold sheets leads to the extraction of heat from the arc column and thus to the deterioration of the conductivity of the plasma.
  • the arc tries to defend by radial contraction and thus increase the current density and temperature and a correspondingly higher conductivity of the column.
  • it bulges around the individual sheets while the exposed column sections can move. This lasts until the bow portion lying around a lower edge has a voltage drop which is greater than that which it needs when it stands between the sheets.
  • partial arcs are formed and the forces that drive him onto the laminated core propel him into it. Stronger cooling increases the voltage requirement of the bow column with simultaneously decreasing current.
  • the cooling effect of the sheets is given by their thermal conductivity and heat capacity.
  • Arc quenching device for low-voltage switchgear is known with a contact apparatus, comprising at least one movable contact piece, wherein the arc quenching device consists of several, combined into a splitter stack quenching plates, which are stacked between lateral brackets consists.
  • the quenching plates are stacked parallel to the direction of movement of the movable contact piece, so that the plane of the quenching plates extends perpendicular to the direction of movement of the movable contact piece.
  • the quenching plates on the side on which the contact piece moves past V-shaped recessed.
  • the publication DE 10 2004 413 922 A1 is a low-voltage switching device refer to at least one movable contact piece having contact apparatus and further with an arc quenching device of several, combined into a splitter stack quenching plates.
  • the quenching plates of each splitter stack are staggered one behind the other perpendicular to the direction of movement of the movable contact piece, so that there is one closest to the movable contact piece and one most remote from the quenching plate.
  • the quenching plates are slightly bent in their longitudinal extent, which runs parallel to the direction of movement of the movable contact piece. In their width extension, the quenching plates are rectilinear and recessed several times V-shaped at one end of their length.
  • JP 59-93024 is a generic low-voltage switching device refer.
  • the invention has for its object to further increase the erasing power of arc extinguishing equipment for low-voltage switchgear.
  • At least part of the quenching plates in their cross-sectional geometry is adapted to a complex end geometry of the movable contact piece.
  • the complex Face geometry of the movable contact piece is formed opposite to the next closest arc splitter, wherein the movable contact piece moves parallel to the longitudinal extent of the quenching plates.
  • At least a part of the quenching plates has a cross-sectional geometry in such a way that the distance between the movable contact piece and the next closest quenching plate is minimized and kept approximately constant at each point.
  • the direction of movement of the movable contact thus runs perpendicular to the geometry of the invention designed according to the cross section of the quenching plates, whereby the uniformity of the commutation of the arc is maximized on the quenching plate.
  • the arc is divided faster and minimized overall arc burning, optimizing the arc extinguishing while minimizing the required volume for the arc quenching device.
  • the material thickness of the contacts can be minimized thereby, which has a significant savings effect.
  • the face geometry can be complex, i. e.g. have the shape of a circular section or a polygon.
  • the quenching plates each have at least one through-hole perpendicular to the plane in which the metal sheets have the cross-sectional geometry adapted to the end geometry of the movable contact piece. This action causes the arc to run instantaneously to the last sheet of the arc quenching device, thus experiencing maximum splitting and cooling, thereby minimizing extinguishing time.
  • the sheets have at least one recess at the second end perpendicular to the plane in which the sheets have the cross-sectional geometry adapted to the end geometry of the movable contact piece. If the sheets additionally have at least one protrusion at the sheet metal edge in the direction of the plane in which the sheets have the cross-sectional geometry adapted to the end geometry of the movable contact piece, then at least one recess on the second end of the sheets can be used Deep tolerances of the sheets and the grooves are collected, since the remaining between the at least one recess and the edge of the sheet metal web may act as a spring. In addition, the sheets can be fixed in the grooves via this protrusion.
  • the last sheet of the laminated core on the switch contact opposite side is rotated by substantially 180 ° with respect to the other sheets of the package inserted into the lateral brackets. This prevents the arc from moving beyond this last plate. It has also proven to be advantageous if the contacts of the switching device furthest away groove has a greater groove width than the other grooves. As a result, the sheets can be made identical for all positions in the deletion package, since the protrusions on the sheet edge in the direction of the plane in which the sheets of the front geometry of the movable contact piece have adapted cross-sectional geometry, do not clamp the last sheet of laminated core with appropriate constructive anomalies during insertion through the almost entire groove depth.
  • the description refers to an arc geometry adapted to a complex end geometry of the movable contact piece, eg in the form of circular sections or polygons.
  • the invention should not be limited to these geometries. Other geometries, such as multi-tooth geometries, are conceivable.
  • Fig. 1 is a multi-pole low-voltage switchgear (10), namely a three-pole contactor, can be seen in which the top of the device as well as a side wall of the housing (11) has been removed in the drawing for ease of illustration.
  • the housing (11) accommodates six arc quenching devices (20) according to the invention, each consisting of five individual quenching plates (21) and arranged in pairs in the six arc quenching chambers (22).
  • a movable contact piece (31), as well as solid contact pieces (32) to see. When the movable contact piece (31) lifts off from the fixed contact piece (32) when there is a current flow, an arc is produced.
  • the arc is driven into the quenching chamber (22), consisting of a system of quenching plates (21).
  • Fig. 1 the cross-sectional geometry of the quenching plates (21) according to the invention can be seen.
  • the quenching plates (21) are adapted according to the invention in their cross-sectional geometry of the front geometry of the movable contact piece (31).
  • the distance between the movable contact piece (31) and the next closest arc splitter (21) is minimized and approximately constant at each point.
  • the movable contact piece (31) the farthest extinguishing plate (21) was installed rotated by 180 °, see also Fig. 3 ,
  • Fig. 2 is an inventive arc splitter (21) to see.
  • the quenching plate (21) perpendicular to the plane in which the quenching plates (21) have the cross-sectional geometry adapted to the front geometry of the movable contact piece (31)
  • first recesses 23
  • the quenching plate (21) has a through hole (24) perpendicular to the plane in which the quenching plates have the cross-sectional geometry adapted to the front geometry of the movable contact piece (31).
  • embossings (25) can be seen, see also enlarged detail in FIG Fig.
  • the quenching plate (21) has at the second end perpendicular to the plane in which the quenching plates (21) the cross-sectional geometry adapted to the front geometry of the movable contact piece (31), two further, second recesses (27).
  • the quenching plate (21) additionally has, in the amount of this second recess (27), a protrusion (28) on the sheet edge in the direction of the plane in which the sheets (21) have the cross-sectional geometry adapted to the end geometry of the movable contact piece (31) also detail enlargement in Fig.
  • Fig. 3 is a section of the housing (11) with an inventive arc quenching device (20) to recognize. Furthermore, it can be seen on the inside of the illustrated wall of the housing (11) grooves (12) in which the quenching plates (21) spaced apart from each other are supported laterally. The widths of the grooves (12) are chosen in relation to the plate thickness of the quenching plates (21) so that the quenching plates (21) on the bulges (26) are fixed in the grooves (12).

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung betrifft ein- oder mehrpolige Niederspannungs-Schaltgeräte, wie Schutzschalter oder Schütze, mit einem Kontaktapparat einer Lichtbogenlöscheinrichtung.The invention relates to single or multi-pole low-voltage switchgear, such as circuit breakers or contactors, with a contactor of an arc quenching device.

Aus der Druckschrift DE 197 35 522 C1 ist eine Lichtbogenlöscheinrichtung bekannt, die aus mehreren, zu einem Löschblechpaket zusammengefassten Löschblechen besteht, die zwischen seitlichen Halterungen beabstandet gestapelt sind. Die ebene Oberflächen aufweisenden Löschbleche bestehen aus ferromagnetischem Werkstoff und sind mit einem nasenförmigen, meist mittig angeordneten Ausschnitt ausgestattet. Die Löschbleche besitzen üblicherweise eine Materialstärke von 0,5 bis 3 mm. Im Falle der Entstehung eines Lichtbogens wird dieser dadurch gelöscht, dass er durch die entstehenden Magnetkräfte in das System der Löschbleche hineingetrieben wird. In diesen Lichtbogenlöscheinrichtungen wird der Bogen in verhältnismäßig kurze Teillichtbögen aufgeteilt. Die Berührung mit den kalten Blechen führt zum Wärmeentzug aus der Bogensäule und damit zur Verschlechterung der Leitfähigkeit des Plasmas. Hiergegen versucht sich der Bogen durch radiale Zusammenziehung und damit Erhöhung der Stromdichte und Temperatur sowie eine dementsprechend höhere Leitfähigkeit der Säule zu wehren. Zunächst wölbt er sich um die einzelnen Bleche herum, während die freiliegenden Säulenabschnitte sich bewegen können. Das dauert so lange, bis der um eine Unterkante liegende Bogenabschnitt einen Spannungsabfall hat, der größer ist als der, den er braucht, wenn er zwischen den Blechen steht. Dann bilden sich Teillichtbögen und die Kräfte, die ihn auf das Blechpaket zutrieben, treiben ihn hinein. Stärkere Kühlung erhöht den Spannungsbedarf der Bogensäule bei gleichzeitig sinkendem Strom. Die Kühlwirkung der Bleche ist durch ihre Wärmeleitfähigkeit und Wärmekapazität gegeben.From the publication DE 197 35 522 C1 is an arc quenching device is known, which consists of several, combined into a splitter stack quenching plates, which are stacked between lateral brackets spaced. The flat surfaces having quenching plates are made of ferromagnetic material and are equipped with a nose-shaped, usually centrally located cutout. The quenching plates usually have a material thickness of 0.5 to 3 mm. In the case of the creation of an arc, it is extinguished by being driven by the resulting magnetic forces into the system of quenching plates. In these arc quenching devices, the arc is divided into relatively short partial arcs. The contact with the cold sheets leads to the extraction of heat from the arc column and thus to the deterioration of the conductivity of the plasma. Against this, the arc tries to defend by radial contraction and thus increase the current density and temperature and a correspondingly higher conductivity of the column. First, it bulges around the individual sheets while the exposed column sections can move. This lasts until the bow portion lying around a lower edge has a voltage drop which is greater than that which it needs when it stands between the sheets. Then partial arcs are formed and the forces that drive him onto the laminated core propel him into it. Stronger cooling increases the voltage requirement of the bow column with simultaneously decreasing current. The cooling effect of the sheets is given by their thermal conductivity and heat capacity.

Aus der Druckschrift DE 102 47 378 A1 ist eine hinsichtlich der Lichtbogenlöschwirkung optimierte Lichtbogenlöscheinrichtung für Niederspannungsschaltgeräte bekannt, wobei die Lichtbogenlöschbleche oberflächenvergrößernde Strukturierungen aufweisen. Dadurch kann die Kühlwirkung verbessert und bei gleicher Löschkapazität die Anzahl der Bleche verringert werden.From the publication DE 102 47 378 A1 is an optimized with respect to the arc extinguishing effect arc quenching device for low-voltage switchgear known, the arc quenching plates have oberflächenvergrößernde structuring. As a result, the cooling effect can be improved and with the same quenching capacity, the number of sheets can be reduced.

Aus der Druckschrift DE 197 35 522 C1 ist Lichtbogenlöscheinrichtung für Niederspannungsschaltgeräte bekannt mit einem Kontaktapparat, aufweisend mindestens ein bewegliches Kontaktstück, wobei die Lichtbogenlöscheinrichtung aus mehreren, zu einem Löschblechpaket zusammengefassten Löschblechen, die zwischen seitlichen Halterungen beabstandet gestapelt sind, besteht. Die Löschblechen sind parallel zur Bewegungsrichtung des beweglichen Kontaktstücks übereinander gestapelt, sodass sich die Ebene der Löschbleche senkrecht zur Bewegungsrichtung des beweglichen Kontaktstückes erstreckt. Zur Verbesserung der Lichtbogenlöschwirkung sind die Löschbleche an der Seite, an der sich das Kontaktstück vorbei bewegt, V-förmig ausgespart.From the publication DE 197 35 522 C1 Arc quenching device for low-voltage switchgear is known with a contact apparatus, comprising at least one movable contact piece, wherein the arc quenching device consists of several, combined into a splitter stack quenching plates, which are stacked between lateral brackets consists. The quenching plates are stacked parallel to the direction of movement of the movable contact piece, so that the plane of the quenching plates extends perpendicular to the direction of movement of the movable contact piece. To improve the arc extinguishing effect, the quenching plates on the side on which the contact piece moves past, V-shaped recessed.

Der Druckschrift DE 10 2004 413 922 A1 ist ein Niederspannungsschaltgerät zu entnehmen mit mindestens ein bewegliches Kontaktstück aufweisenden Kontaktapparat und weiterhin mit einer Lichtbogenlöscheinrichtung aus mehreren, zu einem Löschblechpaket zusammengefassten Löschblechen. Die Löschbleche jedes Löschblechpaketes sind senkrecht zur Bewegungsrichtung des beweglichen Kontaktstücks hintereinander gestaffelt, sodass ein bezüglich des beweglichen Kontaktstücks ein am nächsten liegendes und ein am weitesten entfernt liegendes Löschblech besteht. Zur federnden Halterung der Löschblechen in Nuten einer Haltevorrichtung sind die Löschbleche in ihrer Längenausdehnung, die parallel zur Bewegungsrichtung des beweglichen Kontaktstücks verläuft, leicht gebogen. In ihrer Breitenausdehnung verlaufen die Löschbleche geradlinig und sind an einem Ende ihrer Längenausdehnung mehrfach V-förmig ausgespart.The publication DE 10 2004 413 922 A1 is a low-voltage switching device refer to at least one movable contact piece having contact apparatus and further with an arc quenching device of several, combined into a splitter stack quenching plates. The quenching plates of each splitter stack are staggered one behind the other perpendicular to the direction of movement of the movable contact piece, so that there is one closest to the movable contact piece and one most remote from the quenching plate. For resilient mounting of the quenching plates in grooves of a holding device, the quenching plates are slightly bent in their longitudinal extent, which runs parallel to the direction of movement of the movable contact piece. In their width extension, the quenching plates are rectilinear and recessed several times V-shaped at one end of their length.

Der Druckschrift JP 59-93024 ist ein gattungsgemäßes Niederspannungsschaltgerät zu entnehmen.The publication JP 59-93024 is a generic low-voltage switching device refer.

Der Erfindung liegt die Aufgabe zugrunde, die Löschleistung von Lichtbogenlöscheinrichtungen für Niederspannungs-Schaltgeräte weiter zu erhöhen.The invention has for its object to further increase the erasing power of arc extinguishing equipment for low-voltage switchgear.

Ausgehend von einer Lichtbogenlösclaeinrichtung der eingangs genannten Art wird die Aufgabe erfindungsgemäß durch die Merkmale des unabhängigen Anspruches gelöst, während den abhängigen Ansprüche vorteilhafte Weiterbildungen der Erfindung zu entnehmen sind.Starting from a Lichtbogenlösclaeinrichtung of the aforementioned type, the object is achieved by the features of the independent claim, while the dependent claims advantageous developments of the invention can be found.

Erfindungsgemäß ist zumindest ein Teil der Löschbleche in Ihrer Querschnittsgeometrie einer komplexen Stirngeometrie des beweglichen Kontaktstücks angepasst. Die komplexe Stirngeometrie des beweglichen Kontaktstücks ist gegenüber dem ihm am nächsten liegenden Löschblech ausgebildet, wobei sich das bewegliche Kontaktstück parallel zur Längenausdehnung der Löschbleche bewegt. Wenigstens ein Teil der Löschbleche weist eine Querschnittsgeometrie dergestalt auf, dass der Abstand zwischen dem beweglichen Kontaktstück und dem ihm am nächsten liegenden Löschblech minimiert und an jeder Stelle annähernd konstant gehalten wird. Die Bewegungsrichtung des beweglichen Kontaktes verläuft demnach senkrecht zu dem hinsichtlich seiner Geometrie erfindungsgemäß gestalteten Querschnitt der Löschbleche, wodurch die Gleichmäßigkeit der Kommutierung des Lichtbogens auf das Löschblech maximiert wird. Dadurch wird der Lichtbogen schneller aufgeteilt und insgesamt die Lichtbogenbrenndauer minimiert, die Lichtbogenlöschung bei gleichzeitiger Minimierung des benötigten Volumens für die Lichtbogenlöscheinrichtung optimiert. Letztendlich kann dadurch auch die Materialstärke der Kontakte minimiert werden, was einen erheblichen Einspareffekt zur Folge hat.According to the invention, at least part of the quenching plates in their cross-sectional geometry is adapted to a complex end geometry of the movable contact piece. The complex Face geometry of the movable contact piece is formed opposite to the next closest arc splitter, wherein the movable contact piece moves parallel to the longitudinal extent of the quenching plates. At least a part of the quenching plates has a cross-sectional geometry in such a way that the distance between the movable contact piece and the next closest quenching plate is minimized and kept approximately constant at each point. The direction of movement of the movable contact thus runs perpendicular to the geometry of the invention designed according to the cross section of the quenching plates, whereby the uniformity of the commutation of the arc is maximized on the quenching plate. As a result, the arc is divided faster and minimized overall arc burning, optimizing the arc extinguishing while minimizing the required volume for the arc quenching device. Ultimately, the material thickness of the contacts can be minimized thereby, which has a significant savings effect.

Die Stirngeometrie kann komplex ausgeformt sein, d.h. z.B. die Form eines Kreisabschnitts oder eines Vielecks aufweisen.The face geometry can be complex, i. e.g. have the shape of a circular section or a polygon.

Als besonders vorteilhaft hat sich erwiesen, an einem Ende senkrecht zu der Ebene, in der die Bleche die der Stirngeometrie des beweglichen Kontaktstücks angepasste Querschnittsgeometrie aufweisen, mindestens eine Aussparung anzubringen. Dadurch wird ein schneller Druckausgleich zwischen Schaltraum und Lichtbogenlöscheinrichtung erreicht. Auch durch diese Maßnahme kann die Form des zwischen den Blechen aufgeteilten Lichtbogens in einer aus solchen Blechen aufgebauten Lichtbogenlöscheinrichtung weiter in Hinblick auf die Brenndauer optimiert werden.It has proven particularly advantageous to provide at least one recess at one end perpendicular to the plane in which the metal sheets have the cross-sectional geometry adapted to the front geometry of the movable contact piece. As a result, a rapid pressure equalization between the control room and arc quenching device is achieved. Also by this measure, the shape of the divided between the sheets of arc can be further optimized in terms of the burning time in a built-up of such sheets arc quenching.

In einer weiteren Ausgestaltung der Erfindung weisen die Löschbleche jeweils mindestens eine Durchgangsbohrung senkrecht zu der Ebene, in der die Bleche die der Stirngeometrie des beweglichen Kontaktstücks angepasste Querschnittsgeometrie aufweisen, auf. Diese Maßnahme bewirkt, dass der Lichtbogen unverzüglich bis zum letzten Blech der Lichtbogenlöscheinrichtung läuft und so die maximale Aufteilung und Abkühlung erfährt, wodurch die Löschzeit minimiert wird.In a further embodiment of the invention, the quenching plates each have at least one through-hole perpendicular to the plane in which the metal sheets have the cross-sectional geometry adapted to the end geometry of the movable contact piece. This action causes the arc to run instantaneously to the last sheet of the arc quenching device, thus experiencing maximum splitting and cooling, thereby minimizing extinguishing time.

Es hat sich als besonders vorteilhaft erwiesen, wenn an den Blechen mindestens eine Prägung an einem Längsrand in der Ebene, in der die Bleche die der Stirngeometrie des beweglichen Kontaktstücks angepasste Querschnittsgeometrie aufweisen, angebracht ist, die bedingt, dass die Bleche auf einer Seite eine Auswölbung zeigen. Weist das Gehäuse der Lichtbogenlöscheinrichtung Nuten auf, in denen die Bleche voneinander beabstandet gestapelt seitlich gehaltert werden können, so können die Bleche bei entsprechender Wahl der Nutenbreiten im Verhältnis zur Blechstärke über diese Auswölbungen fixiert werden.It has proven to be particularly advantageous if at least one embossing on a longitudinal edge in the plane in which the sheets have the geometry of the movable contact piece adapted cross-sectional geometry attached to the sheets, which requires that the sheets on one side a bulge demonstrate. If the housing of the arc quenching device has grooves in which the metal sheets can be supported laterally stacked, then the metal sheets can be fixed in relation to the sheet thickness via these bulges, given a suitable choice of groove widths.

Ebenfalls als vorteilhaft hat es sich erwiesen, wenn die Bleche an dem zweiten Ende senkrecht zu der Ebene, in der die Bleche die der Stirngeometrie des beweglichen Kontaktstücks angepasste Querschnittsgeometrie aufweisen, mindestens eine Aussparung aufweisen. Weisen die Bleche zusätzlich in Höhe dieser mindestens einen Aussparung am zweiten Ende der Bleche mindestens eine Vorwölbung am Blechrand in Richtung der Ebene, in der die Bleche die der Stirngeometrie des beweglichen Kontaktstücks angepasste Querschnittsgeometrie aufweisen, auf, so können über diese Maßnahmen eventuelle Breiten- bzw. Tiefentoleranzen der Bleche und der Nuten aufgefangen werden, da der zwischen der mindestens einen Aussparung und dem Blechrand verbleibende Blechsteg als Feder wirken kann. Zusätzlich können über diese Vorwölbung die Bleche in den Nuten fixiert werden.It has also proven to be advantageous if the sheets have at least one recess at the second end perpendicular to the plane in which the sheets have the cross-sectional geometry adapted to the end geometry of the movable contact piece. If the sheets additionally have at least one protrusion at the sheet metal edge in the direction of the plane in which the sheets have the cross-sectional geometry adapted to the end geometry of the movable contact piece, then at least one recess on the second end of the sheets can be used Deep tolerances of the sheets and the grooves are collected, since the remaining between the at least one recess and the edge of the sheet metal web may act as a spring. In addition, the sheets can be fixed in the grooves via this protrusion.

In einer weiteren bevorzugten Ausführungsform der Erfindung ist das letzte Blech des Blechpakets auf der dem Schaltkontakt entgegen gesetzten Seite um im Wesentlichen 180° gedreht gegenüber den anderen Blechen des Pakets in die seitlichen Halterungen eingesetzt. Dadurch wird der Lichtbogen daran gehindert, sich über dieses letzte Blech hinaus weiter zu bewegen. Es hat sich weiterhin als vorteilhaft erwiesen, wenn die den Kontakten des Schaltgerätes am weitesten entfernt liegende Nut eine größere Nutweite als die anderen Nuten aufweist. Dadurch können die Bleche für alle Positionen im Löschpaket identisch ausgeführt sein, da die Vorwölbungen am Blechrand in Richtung der Ebene, in der die Bleche die der Stirngeometrie des beweglichen Kontaktstücks angepasste Querschnittsgeometrie aufweisen, beim letzten Blech des Blechpakets bei entsprechender Maßabstimmung beim Einführen durch die nahezu gesamte Nuttiefe nicht klemmen. Die Beschreibung bezieht sich auf eine einer komplexen Stirngeometrie des beweglichen Kontaktstücks angepassten Löschblechgeomtrie, z.B. in Form von Kreisabschnitten oder Vielecken. Die Erfindung soll aber nicht auf diese Geometrien beschränkt sein. Auch andere Geometrien, wie z.B. Vielzahngeometrien, sind vorstellbar.In a further preferred embodiment of the invention, the last sheet of the laminated core on the switch contact opposite side is rotated by substantially 180 ° with respect to the other sheets of the package inserted into the lateral brackets. This prevents the arc from moving beyond this last plate. It has also proven to be advantageous if the contacts of the switching device furthest away groove has a greater groove width than the other grooves. As a result, the sheets can be made identical for all positions in the deletion package, since the protrusions on the sheet edge in the direction of the plane in which the sheets of the front geometry of the movable contact piece have adapted cross-sectional geometry, do not clamp the last sheet of laminated core with appropriate Maßabstimmung during insertion through the almost entire groove depth. The description refers to an arc geometry adapted to a complex end geometry of the movable contact piece, eg in the form of circular sections or polygons. The invention should not be limited to these geometries. Other geometries, such as multi-tooth geometries, are conceivable.

Weitere Einzelheiten und Vorteile der Erfindung können den folgenden, anhand von Figuren beschriebenen Ausführungsbeispielen entnommen werden. Es zeigen

Fig. 1:
ein mehrpoliges Niederspannungsschaltgerät, nämlich ein dreipoliges Schütz
Fig. 2:
ein erfindungsgemäßes Löschblech
Fig. 2a:
Ausschnittsvergrößerung aus einem erfindungsgemäßen Löschblech
Fig. 2b:
Ausschnittsvergrößerung aus einem erfindungsgemäßen Löschblech
Fig. 3:
Ausschnitt eines Gehäuses eines Niederspannungsschaltgeräts mit einer erfindungsgemäßen Lichtbogenlöscheinrichtung
Further details and advantages of the invention can be taken from the following, described with reference to figures embodiments. Show it
Fig. 1:
a multi-pole low-voltage switchgear, namely a three-pole contactor
Fig. 2:
an inventive arc splitter
Fig. 2a:
Sectional enlargement of a splitter plate according to the invention
Fig. 2b:
Sectional enlargement of a splitter plate according to the invention
3:
Section of a housing of a low-voltage switchgear with an inventive arc quenching device

In Fig. 1 ist ein mehrpoliges Niederspannungsschaltgerät (10), nämlich ein dreipoliges Schütz, zu sehen, bei dem das Geräteoberteil ebenso wie eine Seitenwand des Gehäuses (11) in der Zeichnung zur besseren Veranschaulichung entfernt wurde. Das Gehäuse (11) beherbergt sechs erfindungsgemäße Lichtbogenlöscheinrichtungen (20), die jeweils aus fünf einzelnen Löschblechen (21) bestehen, und jeweils paarweise in den 6 Lichtbogenlöschkammern (22) angeordnet sind. Weiterhin sind in Fig. 1 ein bewegliches Kontaktstück (31), sowie feste Kontaktstücke (32) zu sehen. Wenn das bewegliche Kotaktstück (31) bei vorhandenem Stromfluss von dem festen Kontaktstück (32) abhebt, entsteht ein Lichtbogen. Durch die entstehenden Magnetkräfte wird der Lichtbogen in die Löschkammer (22), bestehend aus einem System von Löschblechen (21), hineingetrieben. In Fig. 1 ist die Querschnittsgeometrie der erfindungsgemäßen Löschbleche (21) zu erkennen. Die Löschbleche (21) sind in ihrer Querschnittsgeometrie erfindungsgemäß der Stirngeometrie des beweglichen Kontaktstücks (31) angepasst. Dadurch ist der Abstand zwischen dem beweglichen Kontaktstück (31) und dem ihm am nächsten liegenden Löschblech (21) minimiert und an jeder Stelle annähernd konstant. Zusätzlich ist zu erkennen, dass das dem beweglichen Kontaktstück (31) am weitesten entfernt gelegene Löschblech (21) um 180° gedreht eingebaut wurde, siehe hierzu auch Fig. 3.In Fig. 1 is a multi-pole low-voltage switchgear (10), namely a three-pole contactor, can be seen in which the top of the device as well as a side wall of the housing (11) has been removed in the drawing for ease of illustration. The housing (11) accommodates six arc quenching devices (20) according to the invention, each consisting of five individual quenching plates (21) and arranged in pairs in the six arc quenching chambers (22). Furthermore, in Fig. 1 a movable contact piece (31), as well as solid contact pieces (32) to see. When the movable contact piece (31) lifts off from the fixed contact piece (32) when there is a current flow, an arc is produced. As a result of the resulting magnetic forces, the arc is driven into the quenching chamber (22), consisting of a system of quenching plates (21). In Fig. 1 the cross-sectional geometry of the quenching plates (21) according to the invention can be seen. The quenching plates (21) are adapted according to the invention in their cross-sectional geometry of the front geometry of the movable contact piece (31). As a result, the distance between the movable contact piece (31) and the next closest arc splitter (21) is minimized and approximately constant at each point. In addition, it can be seen that the movable contact piece (31) the farthest extinguishing plate (21) was installed rotated by 180 °, see also Fig. 3 ,

In Fig. 2 ist ein erfindungsgemäßes Löschblech (21) zu sehen. An einem Ende des Löschblechs (21) senkrecht zu der Ebene, in der die Löschbleche (21) die der Stirngeometrie des beweglichen Kontaktstücks (31) angepasste Querschnittsgeometrie aufweisen, befinden sich erste Aussparungen (23). Weiterhin weist das Löschblech (21) eine Durchgangsbohrung (24) senkrecht zu der Ebene, in der die Löschbleche die der Stirngeometrie des beweglichen Kontaktstücks (31) angepasste Querschnittsgeometrie aufweisen, auf. An einem Längsrand in der Ebene, in der die Löschbleche (21) die der Stirngeometrie des beweglichen Kontaktstücks (31) angepasste Querschnittsgeometrie aufweisen, sind Prägungen (25) zu erkennen, siehe auch Ausschnittsvergrößerung in Fig. 2b. Diese Prägungen (25) bedingen, dass das Löschblech (21) auf der der Prägung (25) gegenüberliegenden Blechseite eine Auswölbung (26) bildet. Das Löschblech (21) weist an dem zweiten Ende senkrecht zu der Ebene, in der die Löschbleche (21) die der Stirngeometrie des beweglichen Kontaktstücks (31) angepasste Querschnittsgeometrie aufweisen, zwei weitere, zweite Aussparungen (27) auf. Das Löschblech (21) weist zusätzlich in Höhe dieser zweiten Aussparung (27) eine Vorwölbung (28) am Blechrand in Richtung der Ebene, in der die Bleche (21) die der Stirngeometrie des beweglichen Kontaktstücks (31) angepasste Querschnittsgeometrie aufweisen, auf, siehe auch Ausschnittsvergrößerung in Fig. 2b. Der zwischen der zweiten Aussparung (27) und dem Blechrand, an dem sich die Vorwölbung (28) befindet, verbleibende Blechsteg (29) kann als Feder wirken und so eventuelle Breiten- bzw. Tiefentoleranzen der Löschbleche (21) und der Nuten (12) (siehe Fig. 3) auffangen.In Fig. 2 is an inventive arc splitter (21) to see. At one end of the quenching plate (21) perpendicular to the plane in which the quenching plates (21) have the cross-sectional geometry adapted to the front geometry of the movable contact piece (31), there are first recesses (23). Furthermore, the quenching plate (21) has a through hole (24) perpendicular to the plane in which the quenching plates have the cross-sectional geometry adapted to the front geometry of the movable contact piece (31). At a longitudinal edge in the plane in which the quenching plates (21) have the cross-sectional geometry adapted to the front geometry of the movable contact piece (31), embossings (25) can be seen, see also enlarged detail in FIG Fig. 2b , These embossings (25) require that the quenching plate (21) forms a bulge (26) on the sheet side opposite the embossment (25). The quenching plate (21) has at the second end perpendicular to the plane in which the quenching plates (21) the cross-sectional geometry adapted to the front geometry of the movable contact piece (31), two further, second recesses (27). The quenching plate (21) additionally has, in the amount of this second recess (27), a protrusion (28) on the sheet edge in the direction of the plane in which the sheets (21) have the cross-sectional geometry adapted to the end geometry of the movable contact piece (31) also detail enlargement in Fig. 2b , The between the second recess (27) and the edge of the sheet on which the protrusion (28), remaining sheet metal web (29) can act as a spring and thus possible width or depth tolerances of the quenching plates (21) and the grooves (12) (please refer Fig. 3 ) field.

In Fig. 3 ist ein Ausschnitt des Gehäuses (11) mit einer erfindungsgemäßen Lichtbogenlöscheinrichtung (20) zu erkennen. Weiterhin erkennt man auf der Innenseite der dargestellten Wand des Gehäuses (11) Nuten (12), in denen die Löschbleche (21) voneinander beabstandet gestapelt seitlich gehaltert sind. Die Breiten der Nuten (12) sind im Verhältnis zur Blechstärke der Löschbleche (21) so gewählt, dass die Löschbleche (21) über die Auswölbungen (26) in den Nuten (12) fixiert werden.In Fig. 3 is a section of the housing (11) with an inventive arc quenching device (20) to recognize. Furthermore, it can be seen on the inside of the illustrated wall of the housing (11) grooves (12) in which the quenching plates (21) spaced apart from each other are supported laterally. The widths of the grooves (12) are chosen in relation to the plate thickness of the quenching plates (21) so that the quenching plates (21) on the bulges (26) are fixed in the grooves (12).

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
mehrpoliges Niederspannungsschaltgerätmulti-pole low-voltage switchgear
1111
Gehäusecasing
1212
Nutgroove
2020
LichtbogenlöscheinrichtungArc quenching device
2121
Löschblechsplitter
2222
LichtbogenlöschkammerArc chute
2323
1. Aussparung1st recess
2424
DurchgangsbohrungThrough Hole
2525
Prägungembossing
2626
Auswölbungbulge
2727
2. Aussparung2nd recess
2828
Vorwölbungbulging
2929
Blechstegsheet metal web
3131
bewegliches Kontaktstückmovable contact piece
3232
festes Kontaktstücksolid contact piece

Claims (12)

  1. Single-pole or multiple-pole low-voltage switching device having a contact system which has at least one movable contact piece (31) and further having an electric arc extinguishing device (20) which comprises a plurality of extinguishing plates (21) which are assembled to form an extinguishing plate assembly which has, with respect to the movable contact piece (31), an extinguishing plate (21) which is located nearest and an extinguishing plate (21) which is located furthest away, wherein the extinguishing plates (21) are stacked between lateral retention members perpendicularly to the movement direction of the contact piece and with spacing from each other, wherein the movable contact piece (31) has a complex face geometry opposite the extinguishing plate (21) located nearest, characterised in that at least a portion of the extinguishing plates (21) are adapted in terms of the cross-sectional geometry thereof to the complex face geometry of the movable contact piece (31) in such a manner that the spacing between the movable contact piece (31) and the extinguishing plate (21) located closest to it is minimised over the length of the face geometry with substantially identical spacing.
  2. Low-voltage switching device according to Claim 1, characterised in that the complex face geometry of the movable contact piece (31) is constructed to be trapezoidal.
  3. Low-voltage switching device according to Claim 1, characterised in that the complex face geometry of the movable contact piece (31) comprises a multiple-tooth geometry.
  4. Low-voltage switching device according to Claim 1, characterised in that the complex face geometry of the movable contact piece (31) comprises a circular arc.
  5. Low-voltage switching device according to any one of the preceding claims, characterised in that the extinguishing plates (21) have at least one recess (23) at a first end perpendicular to the plane, in which the cross-sectional geometry of the plates (21) is adapted to the face geometry of the movable contact piece (31).
  6. Low-voltage switching device according to any one of the preceding claims, characterised in that the extinguishing plates (21) also have at least one recess (27) at the second end perpendicular to the plane, in which the cross-sectional geometry of the plates (21) is adapted to the face geometry of the movable contact piece (31).
  7. Low-voltage switching device according to Claim 6, characterised in that the extinguishing plates (21) have at the height of the at least one recess (27) at the second end perpendicular to the plane, in which the cross-sectional geometry of the plates is adapted to the face geometry of the movable contact piece (31), at least one protrusion (28) at the plate edge in the direction of the plane, in which the cross-sectional geometry of the plates (21) is adapted to the face geometry of the movable contact piece (31).
  8. Low-voltage switching device according to any one of the preceding claims, characterised in that the extinguishing plates (21) each have at least one through-hole (24) perpendicular to the plane, in which the cross-sectional geometry of the plates (21) is adapted to the face geometry of the movable contact piece (31).
  9. Low-voltage switching device according to any one of the preceding claims, characterised in that the extinguishing plates (21) each have at a longitudinal edge at least one impression (25) which causes the plates to have a protrusion (26) at one side.
  10. Low-voltage switching device according to Claim 9, characterised in that the housing (11) of the electrical arc extinguishing device (20) has grooves (12), in which the plates (21) can be stacked with spacing from each other so that the plates are fixed via the protrusions (26).
  11. Low-voltage switching device according to Claim 10, characterised in that the last plate (21) of the plate assembly at the side opposite the movable contact piece (31) is inserted in the lateral retention members in a state rotated through substantially 180° with respect to the other plates (21) of the assembly.
  12. Low-voltage switching device according to Claim 11, characterised in that the groove (12) furthest away from the movable contact piece (31) has a greater groove width than the other grooves (12).
EP11162426.8A 2010-04-16 2011-04-14 Arc extinguishing device Not-in-force EP2378532B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11162426T PL2378532T3 (en) 2010-04-16 2011-04-14 Arc extinguishing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010015216A DE102010015216A1 (en) 2010-04-16 2010-04-16 Arc quenching device

Publications (2)

Publication Number Publication Date
EP2378532A1 EP2378532A1 (en) 2011-10-19
EP2378532B1 true EP2378532B1 (en) 2017-05-17

Family

ID=44259807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11162426.8A Not-in-force EP2378532B1 (en) 2010-04-16 2011-04-14 Arc extinguishing device

Country Status (3)

Country Link
EP (1) EP2378532B1 (en)
DE (1) DE102010015216A1 (en)
PL (1) PL2378532T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2837015A4 (en) * 2012-04-10 2016-02-17 Abb Technology Ltd Arc-quenching device of switch for low, medium and high voltage applications

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1168529B (en) * 1961-06-26 1964-04-23 Licentia Gmbh Electrical switchgear with arc extinguishing device
DE1299346B (en) * 1962-11-22 1969-07-17 Licentia Gmbh Arc extinguishing chamber
US3440378A (en) * 1966-04-05 1969-04-22 Gen Electric Metal plate type of arc-extinguishing device
DE6934073U (en) * 1969-08-28 1970-01-02 Mueller Jean Ohg Elektrotech EXTINGUISH CHAMBER FOR LV HRC FUSE PARTS OR CIRCUITS
DE7716009U1 (en) * 1977-05-20 1977-10-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switching device
JPS5993024U (en) * 1982-12-16 1984-06-23 三菱電機株式会社 electromagnetic contactor
DE19735522C1 (en) 1997-08-16 1999-01-28 Kloeckner Moeller Gmbh Bracket for extinguishing sheets of an arc extinguishing device
DE10247378A1 (en) 2002-10-10 2004-04-22 Moeller Gmbh Arc quenching device
DE102004013922B4 (en) * 2004-03-22 2006-02-16 Siemens Ag Arc extinguishing sheet metal member for switching equipment, especially contactor, insertable in longitudinal direction of its expansion into holder of groove of arc extinguishing device, with sheet metal member bent over its expansion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2378532A1 (en) 2011-10-19
DE102010015216A1 (en) 2011-10-20
PL2378532T3 (en) 2017-10-31

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