EP3138111B1 - Switching device with arc extinguishing device - Google Patents

Switching device with arc extinguishing device Download PDF

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Publication number
EP3138111B1
EP3138111B1 EP14780796.0A EP14780796A EP3138111B1 EP 3138111 B1 EP3138111 B1 EP 3138111B1 EP 14780796 A EP14780796 A EP 14780796A EP 3138111 B1 EP3138111 B1 EP 3138111B1
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EP
European Patent Office
Prior art keywords
cage
switching device
pocket arrangement
switching
arc
Prior art date
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Active
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EP14780796.0A
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German (de)
French (fr)
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EP3138111A1 (en
Inventor
Rudolf GRÄFENHAHN
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Siemens AG
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Siemens AG
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0214—Housing or casing lateral walls containing guiding grooves or special mounting facilities
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2205/00—Movable contacts
    • H01H2205/002—Movable contacts fixed to operating part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker

Definitions

  • the invention relates to a single- or multi-pole switching device having a switching chamber with an arc extinguishing device for each pole, wherein the switching chamber each having two side walls between which a cage is arranged, which is provided for supporting a movable contact bridge, wherein arranged on the contact bridge contacts are, wherein the arc extinguishing device comprises a plurality of quenching plates, the ends of which are accommodated in a bag assembly.
  • Switchgear is often designed as a circuit breaker. These are special switching devices whose main task is to non-destructively switch the downstream devices without voltage and electrical load (i.e., in the current-carrying state) in order to protect them against overload and / or short-circuit damage, for example.
  • Protected downstream devices include motors, transformers and other electrical equipment.
  • a switching device which has a switching structure comprising a cage assembly with two side walls and a bottom wall, wherein the cage assembly is at least partially formed as a cage in which a slider is slidably mounted.
  • a fixed contacts associated movable contact bridge is held under the action of a contact pressure spring and provided for the displacement of the contact bridge, a clearance between the two first side walls.
  • a stop is provided for holding the slider.
  • the switching structure includes switching chambers formed by insulating second side walls, the second side walls defining a volume containing the opening arcs, and the second side walls are disposed on opposite sides of the cage assembly comprising the cage and separated therefrom by a gap.
  • a web is disclosed, which engages positively in the gap between the cage assembly and the side walls and thus completely fills it.
  • a switching device which comprises an arc quenching chamber housing provided with arc quenching ribs, this device being intended to be used in each pole of switching devices, in particular multi-pole low-voltage circuit breakers or switching contactors.
  • side walls of the arc quenching chamber housing are provided in this device having guide means for the ends of the arc quenching ribs.
  • these guide means comprise a body formed on each side wall towards the interior of the arc quenching chamber housing and extended by a side rib substantially parallel to the side wall and forming with this wall a seat capable of receiving the ends of the arc quenching ribs.
  • the body may have a substantially rectangular cross-section over the entire height of the wall. The length of the side rib makes it possible to cover the ends sufficiently to electrically isolate them from the movable contacts, the stationary contacts and the bridge of movable contacts when an arc occurs.
  • the present invention has for its object to provide a single or multi-pole switching device with a device for extinguishing arcing, which consists of as few items as possible, inexpensive and automated to manufacture and has sufficient mechanical and thermal stability under the influence of arcing.
  • the object is achieved by a switching device according to independent claim 1. Further embodiments emerge from the subclaims. With lateral support here the stop is called, which does not hold the cage in the switching direction, but in the direction of the quenching plates, so that the movement of the contact bridge is fixed so that inter alia, no electrical contact between the contact bridge and the quenching plates can come about.
  • the invention is based on the finding that in the prior art, for example by thermal expansion in the event of arcs, forces are impressed on the cage, which in turn can affect the proper operation of the contact bridge in the cage.
  • the inventive design of the switching device is realized by a small number of individual parts, which brings great advantages in terms of throughput time and costs in automated assembly.
  • the structure of the switching device itself and the combination of cage and bag assembly in particular with respect to the force effects of the housing on the cage in the case of arcing is optimized to prevent jamming or tilting of the contact bridge.
  • the side walls and the pocket arrangement preferably uniform wall thicknesses, whereby the tendency is reduced to change the original shape and to warp.
  • the cage can be optimized in addition to its static properties with respect to its Gleitreibeigenschaften and abrasion resistance for a proper, long life.
  • the holder is per side wall of a pair of projections between which forms a groove, in which then a correspondingly shaped Counterpart on the cage engages positively.
  • the thus generated lateral support of the cage prevents slipping of the cage and thus the contact bridge in the direction of the quenching plates within the usual tolerances.
  • the lateral support can also be made by any well-known from the prior art tongue and groove, conical, dovetail or other compounds.
  • the pocket arrangement into which the sheet-metal-fin ends are received and electrically insulated from the contact bridge is welded to the respective side wall or, ideally, formed directly in the production process of the side walls.
  • the counterpart of the holder is not mounted centrally on the cage, but asymmetrically or with a center offset to define a predetermined mounting position of the cage for mounting.
  • the bracket is accordingly provided with center offset with respect to the cage on the side walls.
  • the fixture does not necessarily have to be placed symmetrically on the two side walls which receive the cage, but rather may be optimized for other aspects, such as the thickness of the sidewalls at the position of the fixture.
  • the bag assembly is made of an electrically insulating material that isolates the quenching plates and the contact bridge from the quenching packet.
  • the bag assembly may have a plurality of evenly spaced ribs in which the parallel Extinguishing plates are added and mechanically stabilize them and electrically isolate each other.
  • the pocket assembly at the end facing towards the cage has an extension which reduces the distance between the cage and the bag assembly, resulting in an optimal sealing of the switching chamber with respect to the side walls and thus a good guiding of the arc in ensures the switching chamber.
  • the switching chamber is as compact as possible, which in turn is optimal for the guidance of the arcs in the direction of the extinguishing package.
  • the distance between the cage and extension of the bag assembly by the shape of the cage and the extension can be reduced to a minimum, which further improves the guidance of the arcs.
  • a recess or groove in the cage should be mentioned here, into which the extension of the pocket arrangement protrudes.
  • the distance between the cage and the extension of the pocket arrangement should be at least so large that the welding of the two elements does not occur due to the extreme effects of the arc. Also included in this consideration should be the criterion that with temperature-induced expansion of the material from which the bag assembly and its extension are made, unfavorable forces on the cage are to be avoided and jamming or tilting of the contact bridge can be prevented. This not only ensures that the cage always guides the contact bridge optimally, but that the cage can also be easily exchanged in a certain cycle.
  • the separation of the cage from the side walls and the bag assembly also has the advantage of being able to optimize all elements with regard to their necessary properties.
  • the side walls and the bag arrangement are with regard to
  • the outgassing properties under arc effect of relevance to achieve a good arc guidance and rapid arc quenching can be achieved.
  • the main focus is on the sliding friction properties of the selected material, whereby the abrasion resistance and the temperature resistance must not be neglected.
  • polyamides in particular Creamid® or Ultramid®, are suitable here.
  • FIG. 1 shows a cross section of a switching device 1 according to the invention with an arc extinguishing device, which consists essentially of a bag assembly 4 and a plurality of quenching plates 26 and the splitter plate ends 27 constructed quenching package 28.
  • the cut was placed by a switching chamber 5 and a contact bridge 10 of the switching device.
  • a cage 16 is held laterally by a holder 7, wherein the cage 16, the holder 7 is hidden and this is thus not shown.
  • the section through the contact bridge 10 shows the arrangement of a respective contact 12 per side and the contact bridge 10 in the cage 16. In this case, the contact bridge 10 is held by a spring 13 and can be moved by a contact slide 14.
  • the distance between the cage 16 and the pocket assembly 4 and its extension 4a is here selected so that the arc optimally away from the contacts in the arc extinguishing device to be led. This effect can increase a skew on the extension 4a.
  • the mutually electrically insulated quenching plates 26 form the erase package 28 in which the arc is then deleted.
  • the cage 16 is designed as a separate part and can thus be optimized with regard to the important for a long life sliding friction and abrasion resistance. A simple replacement of the cage 16 is also possible. This design is optimized for both a long life and for a cost-effective, simple and automatable assembly.
  • FIG. 2 shows a three-pole running switching device 1, in which the cage 16 and the contact bridge 10 are not shown for reasons of clarity. It was already related to FIG. 1 introduced reference numerals used.
  • the holder 7, the projections 8 and a groove 9 used in this embodiment are visible.
  • the side walls 3 are partially designed as partitions between two switching chambers 5 or as outer walls of a switching chamber 5.
  • the switching chamber 5 is essentially bounded laterally by the pocket arrangement 4 and its extension 4a and the extinguishing packets 28. There are in each case two extinguishing packets 28 per pole between the side walls 3 and fixed by means of recording the sheet metal ends 27 in the pocket devices 4.
  • a housing 2 is here made in one piece, but can also be designed so that it must be assembled from several parts.
  • guide rails 2a are provided for the side walls 4, which are not designed as an outer wall, that are plugged into the interior of the housing.
  • the brackets 7 for the cage 16 are not centrally located to set a clear mounting position of the cage 16. This has the advantage that when assembling the switching device, the cage 16 is always arranged correctly, and a faulty assembly of the switching device 1 is avoided.
  • the design can be applied not only for three-pole but also analogously for single or multi-pole switching devices.
  • the invention relates to a single- or multi-pole switching device having a switching chamber with an arc extinguishing device for each pole.
  • the switching chamber has two side walls, between which a cage is arranged, which carries a movable contact bridge. On the contact bridge contacts are arranged.
  • the arc extinguishing device has a plurality of extinguishing plates, the ends of which are accommodated in a pocket arrangement.
  • the sidewalls include a support for lateral retention of the cage in a direction transverse to a switching travel direction of the contacts and parallel to the sidewalls, the pocket assembly being separate from the cage Component which is spaced from the cage such that it does not provide such lateral support for the cage.

Landscapes

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

Description

Die Erfindung betrifft ein ein- oder mehrpoliges Schaltgerät, das für jeden Pol eine Schaltkammer mit einer Lichtbogenlöschvorrichtung aufweist, wobei die Schaltkammer jeweils zwei Seitenwände aufweist zwischen denen ein Käfig angeordnet ist, der zur Lagerung einer beweglichen Kontaktbrücke vorgesehen ist, wobei auf der Kontaktbrücke Kontakte angeordnet sind, wobei die Lichtbogenlöschvorrichtung mehrere Löschbleche aufweist, deren Enden in einer Taschenanordnung aufgenommen sind.The invention relates to a single- or multi-pole switching device having a switching chamber with an arc extinguishing device for each pole, wherein the switching chamber each having two side walls between which a cage is arranged, which is provided for supporting a movable contact bridge, wherein arranged on the contact bridge contacts are, wherein the arc extinguishing device comprises a plurality of quenching plates, the ends of which are accommodated in a bag assembly.

Ein derartiges Schaltgerät kommt zum Beispiel in der industriellen Schalttechnik zum Einsatz. Schaltgeräte sind dort häufig als Leistungsschalter ausgeführt. Dabei handelt es sich um spezielle Schaltgeräte, deren Hauptaufgabe darin besteht, zerstörungsfrei auch unter elektrischer Last (d.h. im stromtragenden Zustand) die nachgelagerten Geräte strom- und spannungsfrei zu schalten um sie beispielsweise vor Überlast-und/oder Kurzschlussschäden zu schützen. Zu den schützenswerten, nachgelagerten Geräten zählen unter anderem Motoren, Transformatoren sowie weitere elektrische Geräte.Such a switching device is used for example in industrial switching technology. Switchgear is often designed as a circuit breaker. These are special switching devices whose main task is to non-destructively switch the downstream devices without voltage and electrical load (i.e., in the current-carrying state) in order to protect them against overload and / or short-circuit damage, for example. Protected downstream devices include motors, transformers and other electrical equipment.

Aus der DE 103 56 271 A1 ist ein Schaltgerät bekannt, das eine Schaltstruktur aufweist, die eine Käfig-Baugruppe mit zwei Seitenwänden und einer Bodenwand umfasst, wobei die Käfig-Baugruppe zumindest teilweise als Käfig ausgebildet ist, in dem ein Schieber verschiebbar gelagert ist. In einer Öffnung des Schiebers ist eine festen Kontakten zugeordnete bewegliche Kontaktbrücke unter Beaufschlagung einer Kontaktdruckfeder gehalten und für die Verschiebung der Kontaktbrücke ein Freiraum zwischen den beiden ersten Seitenwänden vorgesehen. Zur Halterung des Schiebers ist ein Anschlag vorgesehen. Zur Schaltstruktur gehören durch isolierende zweite Seitenwände gebildete Schaltkammern, wobei die zweiten Seitenwände ein Volumen begrenzen, das die Öffnungs-Lichtbögen enthält, und die zweiten Seitenwände auf gegenüberliegenden Seiten der den Käfig umfassenden Käfig-Baugruppe und von diesem jeweils durch einen Spalt getrennt angeordnet sind. Weiterhin wird ein Steg offenbart, der in den Spalt zwischen der Käfig-Baugruppe und den Seitenwänden formschlüssig eingreift und diesen somit komplett ausfüllt.
Aus der DE 600 27 842 T2 ist eine Schaltvorrichtung bekannt, die ein Lichtbogenlöschkammer-Gehäuse aufweist, das mit Lichtbogenlöschrippen versehen ist, wobei diese Vorrichtung dazu bestimmt ist, in jedem Pol von Schaltgeräten, insbesondere von mehrpoligen Niederspannungs-Trennschaltern oder - Schalt-Schützen, verwendet zu werden. Dabei sind bei dieser Vorrichtung Seitenwände des Lichtbogenlöschkammer-Gehäuses vorgesehen, die Führungsmittel für die Enden der Lichtbogenlöschrippen aufweisen. Gemäß einer bevorzugten Ausführungsform weisen diese Führungsmittel einen Körper auf, der an jede Seitenwand zum Inneren des Lichtbogenlöschkammer-Gehäuses hin angeformt und durch eine Seitenrippe im Wesentlichen parallel zur Seitenwand verlängert ist und mit dieser Wand einen Sitz bildet, der die Enden der Lichtbogenlöschrippen aufnehmen kann. Der Körper kann zum Beispiel über die ganze Höhe der Wand einen im Wesentlichen rechtwinkligen Querschnitt aufweisen. Die Länge der Seitenrippe ermöglicht es, die Enden genügend zu bedecken, um sie beim Auftreten eines Lichtbogens von den beweglichen Kontakten, den ortsfesten Kontakten und der Brücke von beweglichen Kontakten elektrisch zu isolieren.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein ein- oder mehrpoliges Schaltgerät mit einer Vorrichtung zum Löschen von Lichtbögen bereitzustellen, das aus möglichst wenigen Einzelteilen besteht, kostengünstig und automatisierbar herzustellen ist und eine ausreichende mechanische und thermische Stabilität unter Lichtbogeneinfluss aufweist. Die Aufgabe wird durch ein Schaltgerät gemäß des unabhängigen Anspruchs 1 gelöst. Weitere Ausgestaltungen ergeben sich aus den Unteransprüchen. Mit seitlichem Halt ist hier der Halt bezeichnet, der den Käfig nicht in Schaltrichtung hält, sondern in Richtung der Löschbleche, so dass die Bewegung der Kontaktbrücke derart fixiert ist, dass unter anderem kein elektrischer Kontakt zwischen der Kontaktbrücke und den Löschblechen zustande kommen kann.
Der Erfindung liegt die Erkenntnis zu Grunde, dass beim Stand der Technik, beispielsweise durch thermische Ausdehnung im Lichtbogenfall, Kräfte auf den Käfig eingeprägt werden, was wiederum den ordnungsgemäßen Lauf der Kontaktbrücke im Käfig beeinträchtigen kann.
Der erfindungsgemäße Aufbau des Schaltgeräts wird durch eine geringe Zahl an Einzelteilen realisiert, was bei der automatisierten Montage große Vorteile hinsichtlich Durchlaufzeit und Kosten mit sich bringt. Darüber hinaus ist der Aufbau des Schaltgeräts an sich und der Kombination aus Käfig und Taschenanordnung im Speziellen hinsichtlich der Krafteinwirkungen des Gehäuses auf den Käfig im Lichtbogenfall optimiert, um ein Verklemmen oder Verkanten der Kontaktbrücke zu verhindern. Dabei haben die Seitenwände und die Taschenanordnung bevorzugt gleichmäßige Wandstärken, wodurch sich die Neigung verringert die ursprüngliche Form zu verändern und sich zu verziehen. Zusätzlich kann der Käfig neben seiner statischen Eigenschaften auch hinsichtlich seiner Gleitreibeigenschaften und Abriebfestigkeit für eine bestimmungsgemäße, hohe Lebensdauer optimiert sein.
In einer weiteren Ausführungsform besteht die Halterung dabei pro Seitenwand aus einem Paar von Vorsprüngen zwischen denen sich eine Nut bildet, in die dann ein entsprechend geformtes Gegenstück am Käfig formschlüssig eingreift. Der dadurch erzeugte seitliche Halt des Käfigs verhindert im Rahmen der üblichen Toleranzen ein Verrutschen des Käfigs und somit der Kontaktbrücke in Richtung der Löschbleche. Dabei kann der seitliche Halt natürlich auch durch jegliche bereits hinlänglich aus dem Stand der Technik bekannten Nut-Feder-, Zapfen-, Schwalbenschwanz- oder anderer Verbindungen hergestellt werden. Erfindungsgemäß wird die Taschenanordnung, in die die Löschblechenden aufgenommen und gegenüber der Kontaktbrücke elektrisch isoliert werden, mit der jeweiligen Seitenwand verschweißt oder idealerweise direkt im Produktionsprozess der Seitenwände mit angeformt. So ist kein Zusatzteil mit der Funktion der Taschenanordnung nötig was den Aufbau und die Produktion des Schaltgeräts vereinfacht. Durch das direkte Anformen wird außerdem eine hohe Positioniergenauigkeit sowohl der Taschenanordnung selbst als auch der Löschbleche erreicht, was wiederum die Serienstreuung des Schaltgeräts vermindert und eine durchgehend hohe Qualität begünstigt.
In einer weiteren Ausführungsform ist das Gegenstück der Halterung nicht mittig am Käfig angebracht, sondern asymmetrisch oder mit einem Mittenversatz um eine vorgegebene Einbaulage des Käfigs für die Montage zu definieren. Die Halterung ist dementsprechend mit Mittenversatz im Bezug auf den Käfig an den Seitenwänden vorzusehen. Dabei muss die Halterung nicht zwangsläufig symmetrisch auf den beiden Seitenwänden, die den Käfig aufnehmen, platziert werden, sondern kann vielmehr nach anderen Gesichtspunkten, wie Materialstärke der Seitenwände an der Position der Halterung, optimiert sein.
In weiteren Ausführungsformen ist die Taschenanordnung aus einem elektrisch isolierenden Material gefertigt, das die Löschbleche und die Kontaktbrücke von dem Löschpaket isoliert. Weiterhin kann die Taschenanordnung mehrere, gleichmäßig beabstandete Rippen aufweisen, in die die parallelen Löschbleche aufgenommen werden und diese mechanisch stabilisieren und untereinander elektrisch isolieren.From the DE 103 56 271 A1 a switching device is known which has a switching structure comprising a cage assembly with two side walls and a bottom wall, wherein the cage assembly is at least partially formed as a cage in which a slider is slidably mounted. In an opening of the slide a fixed contacts associated movable contact bridge is held under the action of a contact pressure spring and provided for the displacement of the contact bridge, a clearance between the two first side walls. For holding the slider, a stop is provided. The switching structure includes switching chambers formed by insulating second side walls, the second side walls defining a volume containing the opening arcs, and the second side walls are disposed on opposite sides of the cage assembly comprising the cage and separated therefrom by a gap. Furthermore, a web is disclosed, which engages positively in the gap between the cage assembly and the side walls and thus completely fills it.
From the DE 600 27 842 T2 For example, a switching device is known which comprises an arc quenching chamber housing provided with arc quenching ribs, this device being intended to be used in each pole of switching devices, in particular multi-pole low-voltage circuit breakers or switching contactors. In this case, side walls of the arc quenching chamber housing are provided in this device having guide means for the ends of the arc quenching ribs. According to a preferred embodiment, these guide means comprise a body formed on each side wall towards the interior of the arc quenching chamber housing and extended by a side rib substantially parallel to the side wall and forming with this wall a seat capable of receiving the ends of the arc quenching ribs. For example, the body may have a substantially rectangular cross-section over the entire height of the wall. The length of the side rib makes it possible to cover the ends sufficiently to electrically isolate them from the movable contacts, the stationary contacts and the bridge of movable contacts when an arc occurs.
The present invention has for its object to provide a single or multi-pole switching device with a device for extinguishing arcing, which consists of as few items as possible, inexpensive and automated to manufacture and has sufficient mechanical and thermal stability under the influence of arcing. The object is achieved by a switching device according to independent claim 1. Further embodiments emerge from the subclaims. With lateral support here the stop is called, which does not hold the cage in the switching direction, but in the direction of the quenching plates, so that the movement of the contact bridge is fixed so that inter alia, no electrical contact between the contact bridge and the quenching plates can come about.
The invention is based on the finding that in the prior art, for example by thermal expansion in the event of arcs, forces are impressed on the cage, which in turn can affect the proper operation of the contact bridge in the cage.
The inventive design of the switching device is realized by a small number of individual parts, which brings great advantages in terms of throughput time and costs in automated assembly. In addition, the structure of the switching device itself and the combination of cage and bag assembly in particular with respect to the force effects of the housing on the cage in the case of arcing is optimized to prevent jamming or tilting of the contact bridge. In this case, the side walls and the pocket arrangement preferably uniform wall thicknesses, whereby the tendency is reduced to change the original shape and to warp. In addition, the cage can be optimized in addition to its static properties with respect to its Gleitreibeigenschaften and abrasion resistance for a proper, long life.
In a further embodiment, the holder is per side wall of a pair of projections between which forms a groove, in which then a correspondingly shaped Counterpart on the cage engages positively. The thus generated lateral support of the cage prevents slipping of the cage and thus the contact bridge in the direction of the quenching plates within the usual tolerances. Of course, the lateral support can also be made by any well-known from the prior art tongue and groove, conical, dovetail or other compounds. According to the invention, the pocket arrangement into which the sheet-metal-fin ends are received and electrically insulated from the contact bridge is welded to the respective side wall or, ideally, formed directly in the production process of the side walls. Thus, no additional part with the function of the bag assembly is necessary which simplifies the construction and production of the switching device. By direct molding also a high positioning accuracy of both the bag assembly itself and the quenching plates is achieved, which in turn reduces the series dispersion of the switching device and favors a consistently high quality.
In a further embodiment, the counterpart of the holder is not mounted centrally on the cage, but asymmetrically or with a center offset to define a predetermined mounting position of the cage for mounting. The bracket is accordingly provided with center offset with respect to the cage on the side walls. The fixture does not necessarily have to be placed symmetrically on the two side walls which receive the cage, but rather may be optimized for other aspects, such as the thickness of the sidewalls at the position of the fixture.
In further embodiments, the bag assembly is made of an electrically insulating material that isolates the quenching plates and the contact bridge from the quenching packet. Furthermore, the bag assembly may have a plurality of evenly spaced ribs in which the parallel Extinguishing plates are added and mechanically stabilize them and electrically isolate each other.

In einer weiteren Ausführungsform hat die Taschenanordnung an dem Ende, das in Richtung Käfig zeigt, eine Verlängerung, die den Abstand zwischen dem Käfig und der Taschenanordnung verringert, was zu einer optimalen Abdichtung der Schaltkammer gegenüber der Seitenwände führt und somit eine gute Führung des Lichtbogens in der Schaltkammer gewährleistet. Vorteilhaft ist hier weiterhin, dass die Schaltkammer möglichst kompakt wird, was wiederum für die Führung der Lichtbögen in Richtung des Löschpakets optimal ist. Ebenfalls vorteilhaft kann der Abstand zwischen Käfig und Verlängerung der Taschenanordnung durch die Formgebung vom Käfig und der Verlängerung auf ein Minimum reduziert werden, was die Führung der Lichtbögen weiter verbessert. Beispielhaft wäre hier eine Aussparung oder Nut im Käfig zu nennen, in die die Verlängerung der Taschenanordnung hineinragt.In a further embodiment, the pocket assembly at the end facing towards the cage has an extension which reduces the distance between the cage and the bag assembly, resulting in an optimal sealing of the switching chamber with respect to the side walls and thus a good guiding of the arc in ensures the switching chamber. It is also advantageous here that the switching chamber is as compact as possible, which in turn is optimal for the guidance of the arcs in the direction of the extinguishing package. Also advantageously, the distance between the cage and extension of the bag assembly by the shape of the cage and the extension can be reduced to a minimum, which further improves the guidance of the arcs. By way of example, a recess or groove in the cage should be mentioned here, into which the extension of the pocket arrangement protrudes.

Um die Funktion des Schaltgeräts im Lichtbogenfall nicht zu beeinträchtigen, ist der Abstand zwischen dem Käfig und der Verlängerung der Taschenanordnung mindestens so groß zu wählen, dass durch die extremen Einflüsse des Lichtbogens keine Verschweißung der beiden Elemente auftritt. Auch in diese Betrachtung mit einfließen sollte das Kriterium, dass bei temperaturbedingter Ausdehnung des Materials, aus dem die Taschenanordnung und deren Verlängerung gefertigt sind, ungünstige Krafteinwirkungen auf den Käfig zu vermeiden sind und ein Verklemmen oder Verkanten der Kontaktbrücke so verhindert werden kann. So ist nicht nur sichergestellt, dass der Käfig die Kontaktbrücke immer optimal führen, sondern der Käfig auch in einem gewissen Zyklus problemlos ausgetauscht werden kann.In order not to impair the function of the switching device in the event of arcs, the distance between the cage and the extension of the pocket arrangement should be at least so large that the welding of the two elements does not occur due to the extreme effects of the arc. Also included in this consideration should be the criterion that with temperature-induced expansion of the material from which the bag assembly and its extension are made, unfavorable forces on the cage are to be avoided and jamming or tilting of the contact bridge can be prevented. This not only ensures that the cage always guides the contact bridge optimally, but that the cage can also be easily exchanged in a certain cycle.

Die Trennung des Käfigs von den Seitenwänden und der Taschenanordnung hat des Weiteren den Vorteil, alle Elemente hinsichtlich ihrer notwendigen Eigenschaften optimieren zu können. Die Seitenwände und die Taschenanordnung sind hinsichtlich ihrer isolierenden Eigenschaften zu optimieren, darüber hinaus sind auch die Ausgasungseigenschaften unter Lichtbogeneinwirkung von Relevanz um eine gute Lichtbogenführung und schnelle Lichtbogenlöschung zu erreichen.
Beim Käfig stehen vor allem die Gleitreibeigenschaften des gewählten Materials im Vordergrund, wobei die Abriebfestigkeit und die Temperaturbeständigkeit nicht vernachlässigt werden darf. Hier bieten sich vor allem Polyamide an, insbesondere Creamid® oder Ultramid®.The separation of the cage from the side walls and the bag assembly also has the advantage of being able to optimize all elements with regard to their necessary properties. The side walls and the bag arrangement are with regard to In addition, the outgassing properties under arc effect of relevance to achieve a good arc guidance and rapid arc quenching can be achieved.
In the cage, the main focus is on the sliding friction properties of the selected material, whereby the abrasion resistance and the temperature resistance must not be neglected. Above all, polyamides, in particular Creamid® or Ultramid®, are suitable here.

Im Folgenden wird die Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher beschrieben und erläutert. Es zeigen:

FIG 1
einen Querschnitt eines erfindungsgemäßen Schaltgeräts mit Lichtbogenlöschvorrichtung und
FIG 2
eine Schrägsicht eines dreipoligen Schaltgeräts, ohne Käfig und Kontaktbrücke.
In the following the invention will be described and explained in more detail with reference to the embodiments illustrated in the figures. Show it:
FIG. 1
a cross section of a switching device according to the invention with arc extinguishing device and
FIG. 2
an oblique view of a three-pole switching device, without cage and contact bridge.

FIG 1 zeigt einen Querschnitt eines erfindungsgemäßen Schaltgeräts 1 mit einer Lichtbogenlöschvorrichtung, die im Wesentlichen aus einer Taschenanordnung 4 und einem aus mehreren Löschblechen 26 und deren Löschblechenden 27 aufgebauten Löschpaket 28 besteht. Der Schnitt wurde dabei durch eine Schaltkammer 5 und eine Kontaktbrücke 10 des Schaltgeräts gelegt. Weiterhin dargestellt sind eine Seitenwand 3, hier als Außenwand ausgeführt, die Taschenanordnung 4 und deren Verlängerung 4a. Ein Käfig 16 wird durch eine Halterung 7 seitlich gehalten, wobei der Käfig 16 die Halterung 7 verdeckt und diese somit nicht abgebildet ist. Der Schnitt durch die Kontaktbrücke 10 zeigt die Anordnung jeweils eines Kontakts 12 pro Seite sowie der Kontaktbrücke 10 im Käfig 16. Dabei wird die Kontaktbrücke 10 durch eine Feder 13 gehalten und kann durch einen Kontaktschieber 14 bewegt werden. FIG. 1 shows a cross section of a switching device 1 according to the invention with an arc extinguishing device, which consists essentially of a bag assembly 4 and a plurality of quenching plates 26 and the splitter plate ends 27 constructed quenching package 28. The cut was placed by a switching chamber 5 and a contact bridge 10 of the switching device. Also shown are a side wall 3, designed here as an outer wall, the bag assembly 4 and its extension 4a. A cage 16 is held laterally by a holder 7, wherein the cage 16, the holder 7 is hidden and this is thus not shown. The section through the contact bridge 10 shows the arrangement of a respective contact 12 per side and the contact bridge 10 in the cage 16. In this case, the contact bridge 10 is held by a spring 13 and can be moved by a contact slide 14.

Der Abstand zwischen dem Käfig 16 und der Taschenanordnung 4 und ihrer Verlängerung 4a ist hier so gewählt, dass der Lichtbogen optimal von den Kontakten weg in die Lichtbogenlöschvorrichtung geführt wird. Diesen Effekt kann eine Schrägung an der Verlängerung 4a verstärken. Die untereinander elektrisch isolierten Löschbleche 26 bilden das Löschpaket 28 in dem der Lichtbogen dann gelöscht wird. Der Käfig 16 ist dabei als separates Teil ausgeführt und kann somit hinsichtlich der für eine hohe Lebensdauer wichtigen Gleitreibung und Abriebfestigkeit optimiert werden. Ein einfacher Austausch des Käfigs 16 ist ebenso möglich. Diese Aufbauweise ist sowohl für eine hohe Lebensdauer als auch für eine kostengünstige, einfache und automatisierbare Montage optimiert.The distance between the cage 16 and the pocket assembly 4 and its extension 4a is here selected so that the arc optimally away from the contacts in the arc extinguishing device to be led. This effect can increase a skew on the extension 4a. The mutually electrically insulated quenching plates 26 form the erase package 28 in which the arc is then deleted. The cage 16 is designed as a separate part and can thus be optimized with regard to the important for a long life sliding friction and abrasion resistance. A simple replacement of the cage 16 is also possible. This design is optimized for both a long life and for a cost-effective, simple and automatable assembly.

FIG 2 zeigt ein dreipolig ausgeführtes Schaltgerät 1, bei dem der Käfig 16 und die Kontaktbrücke 10 aus Gründen der Übersichtlichkeit nicht dargestellt sind. Es wurden die bereits in Zusammenhang mit FIG 1 eingeführten Bezugszeichen verwendet. Die Halterung 7, die in dieser Ausführungsform verwendeten Vorsprünge 8 und eine Nut 9 sind sichtbar. Die Seitenwände 3 sind teilweise als Trennwände zwischen zwei Schaltkammern 5 oder als Außenwände einer Schaltkammer 5 ausgeführt. Die Schaltkammer 5 wird dabei im Wesentlichen seitlich durch die Taschenanordnung 4 und deren Verlängerung 4a sowie den Löschpaketen 28 begrenzt. Es sind jeweils zwei Löschpakete 28 pro Pol zwischen den Seitenwänden 3 und mittels Aufnahme der Löschblechenden 27 in die Taschenvorrichtungen 4 fixiert. FIG. 2 shows a three-pole running switching device 1, in which the cage 16 and the contact bridge 10 are not shown for reasons of clarity. It was already related to FIG. 1 introduced reference numerals used. The holder 7, the projections 8 and a groove 9 used in this embodiment are visible. The side walls 3 are partially designed as partitions between two switching chambers 5 or as outer walls of a switching chamber 5. The switching chamber 5 is essentially bounded laterally by the pocket arrangement 4 and its extension 4a and the extinguishing packets 28. There are in each case two extinguishing packets 28 per pole between the side walls 3 and fixed by means of recording the sheet metal ends 27 in the pocket devices 4.

Ein Gehäuse 2 ist hier einteilig ausgeführt, kann aber auch so konstruiert werden, dass es aus mehreren Teilen zusammengesteckt werden muss. Für die Seitenwände 4, die nicht als Außenwand ausgeführt sind, also ins Innere des Gehäuses gesteckt werden, sind Führungsschienen 2a vorgesehen. Die Halterungen 7 für den Käfig 16 sind nicht mittig angeordnet um eine eindeutige Einbaulage des Käfigs 16 festzulegen. Dies hat den Vorteil, dass beim Zusammenbau des Schaltgeräts der Käfig 16 immer richtig angeordnet ist, und ein fehlerhaftes Zusammensetzen des Schaltgeräts 1 vermieden wird. Die Konstruktion kann natürlich nicht nur für dreipolige sondern analog auch für ein- oder mehrpolige Schaltgeräte angewandt werden.A housing 2 is here made in one piece, but can also be designed so that it must be assembled from several parts. For the side walls 4, which are not designed as an outer wall, that are plugged into the interior of the housing, guide rails 2a are provided. The brackets 7 for the cage 16 are not centrally located to set a clear mounting position of the cage 16. This has the advantage that when assembling the switching device, the cage 16 is always arranged correctly, and a faulty assembly of the switching device 1 is avoided. Of course, the design can be applied not only for three-pole but also analogously for single or multi-pole switching devices.

Die Erfindung betrifft ein ein- oder mehrpoliges Schaltgerät, das für jeden Pol eine Schaltkammer mit einer Lichtbogenlöschvorrichtung aufweist. Die Schaltkammer weist zwei Seitenwände auf, zwischen denen ein Käfig angeordnet ist, der eine bewegliche Kontaktbrücke trägt. Auf der Kontaktbrücke sind Kontakte angeordnet. Die Lichtbogenlöschvorrichtung weist mehrere Löschbleche auf, deren Enden in einer Taschenanordnung aufgenommen sind.The invention relates to a single- or multi-pole switching device having a switching chamber with an arc extinguishing device for each pole. The switching chamber has two side walls, between which a cage is arranged, which carries a movable contact bridge. On the contact bridge contacts are arranged. The arc extinguishing device has a plurality of extinguishing plates, the ends of which are accommodated in a pocket arrangement.

Zur Bereitstellung eines kostengünstigen und zuverlässigen ein- oder mehrpoligen Schaltgeräts wird vorgeschlagen, dass die Seitenwände eine Halterung für einen seitlichen Halt des Käfigs in einer quer zu einer Schaltbewegungsrichtung der Kontakte und parallel zu den Seitenwänden verlaufenden Richtung aufweisen, wobei die Taschenanordnung eine von dem Käfig getrennte Komponente ist, die derart von dem Käfig beabstandet ist, dass sie keinen derartigen seitlichen Halt für den Käfig bereitstellt.To provide a low cost and reliable single or multi-pole switchgear, it is proposed that the sidewalls include a support for lateral retention of the cage in a direction transverse to a switching travel direction of the contacts and parallel to the sidewalls, the pocket assembly being separate from the cage Component which is spaced from the cage such that it does not provide such lateral support for the cage.

Claims (13)

  1. Single or multiple-pole switching device (1) which has a switching chamber (5) with an arc extinguishing device (4, 26, 27, 28) for each pole, wherein each switching chamber (5) has two side walls (3) between which a cage (16) is arranged which is provided for storing a movable contact bridge (10), wherein contacts (12) are arranged on the contact bridge (10), wherein the arc extinguishing device (4, 26, 27, 28) has a plurality of quenching plates (26), the ends (27) of which are received in a pocket arrangement (4), wherein the side walls (3) comprise a holder (7) for a lateral hold of the cage (16) in a direction extending transversely to a switching movement direction of the contacts (12) and parallel to the side walls (3),
    wherein the pocket arrangement (4) is configured as a component separate from the cage (16) and is spaced from the cage (16) such that it does not provide any such lateral hold for the cage (16), characterised in that the pocket arrangement (4) is formed on the respective side wall (3) or welded to respective the side wall (3).
  2. Switching device according to claim 1, characterised in that the holder (7) is configured as protrusions (8) arranged on the respective side wall (3), in particular as protrusions (8) formed on the side wall (3), wherein provided between the protrusions is a groove (9) into which a corresponding counterelement of the cage (16) protrudes.
  3. Switching device according to claim 1 or 2, wherein the side walls (3) and the pocket arrangement (4) have even wall thicknesses.
  4. Switching device according to one of the preceding claims, characterised in that the holder (7) is arranged on the respective side wall (3) with a central offset and/or asymmetrical with respect to the cage (16).
  5. Switching device according to one of the preceding claims, characterised in that the pocket arrangement (4) electrically isolates the ends of the quenching plates (26) with respect to the contact bridge (10).
  6. Switching device according to one of the preceding claims, characterised in that the pocket arrangement (4) comprises parallel arranged ribs for receiving the ends (27) of the quenching plates (26), which ensure mutual electrical insulation and spacing of adjacent quenching plates (26).
  7. Switching device according to one of the preceding claims, characterised in that the pocket arrangement (4) comprises an extension (4a) at one end which points in the direction of the cage (16), which reduces the spacing between the cage (16) and the pocket arrangement (4), in order to ensure a good guidance of an arc in the switching chamber (5).
  8. Switching device according to claim 7, characterised in that the cage (16) and the extension (4a) of the pocket arrangement (4) have a cooperating design such that the separation between the cage (16) and the pocket arrangement (4) is reduced to a minimum in order to ensure good guidance of the arc.
  9. Switching device according to claim 7 or 8, characterised in that that cage (16) has a cut-out into which the extension (4a) protrudes.
  10. Switching device according to one of the preceding claims, characterised in that the spacing between the cage (16) and the pocket arrangement (4) is at least so large that even in the event of an arc, no unwanted welding takes place between the two components.
  11. Switching device according to one of the preceding claims, characterised in that the side walls (3) and/or the pocket arrangement (4) is made of a material which is optimised with regard to its starting properties under the effect of an arc.
  12. Switching device according to one of the preceding claims, characterised in that the cage (16) is made of a material which is optimised with regard to its sliding friction properties, in particular a polyamide, preferably Creamid® or Ultramid®.
  13. Switching device according to one of the preceding claims, characterised in that the switching device is configured as a power circuit breaker.
EP14780796.0A 2014-09-24 2014-09-24 Switching device with arc extinguishing device Active EP3138111B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/070336 WO2016045718A1 (en) 2014-09-24 2014-09-24 Switching device with arc extinguishing device

Publications (2)

Publication Number Publication Date
EP3138111A1 EP3138111A1 (en) 2017-03-08
EP3138111B1 true EP3138111B1 (en) 2018-05-02

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EP14780796.0A Active EP3138111B1 (en) 2014-09-24 2014-09-24 Switching device with arc extinguishing device

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US (1) US10224162B2 (en)
EP (1) EP3138111B1 (en)
CN (1) CN107533930B (en)
WO (1) WO2016045718A1 (en)

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Publication number Priority date Publication date Assignee Title
PL3389067T3 (en) * 2017-04-11 2020-06-01 Microelettrica Scientifica S.P.A. High speed circuit breaker for industrial and railways applications
CN109616345A (en) * 2018-12-31 2019-04-12 雷顿电气科技有限公司 The pedestal general assembly of electric switch
US10840035B1 (en) * 2019-08-29 2020-11-17 Rockwell Automation Switzerland Gmbh Arc chamber venting
KR102349754B1 (en) * 2019-12-06 2022-01-11 엘에스일렉트릭(주) Arc box and Magnetic contactor include the same

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US3319035A (en) * 1966-03-04 1967-05-09 Westinghouse Electric Corp Circuit breaker with sealing means for handle opening
FR2687251B1 (en) * 1992-02-11 1994-04-29 Telemecanique CUTTING STRUCTURE FOR CIRCUIT BREAKER.
DE19757332C1 (en) * 1997-12-22 1999-07-22 Siemens Ag Arc quenching device for a switching device
DE19818058C2 (en) * 1998-04-22 2000-12-14 Siemens Ag Switchgear with a switching chamber assembly
FR2801722B1 (en) * 1999-11-25 2001-12-28 Schneider Electric Ind Sa CUTTING DEVICE FOR SWITCHING APPARATUS
DE20316027U1 (en) * 2003-10-18 2004-01-15 Moeller Gmbh Electrical switching device with device for arc extinguishing
DE10356271B4 (en) * 2003-11-28 2008-02-14 Siemens Ag switchgear
KR20060035194A (en) * 2004-10-21 2006-04-26 엘에스산전 주식회사 Arc extinguishing apparatus for molded case circuit breaker
KR100910525B1 (en) * 2007-09-03 2009-07-31 엘에스산전 주식회사 Arc extinguishing device of manual motor starter
US7598833B1 (en) * 2008-07-30 2009-10-06 Eaton Corporation Electrical switching apparatus, and arc chute assembly and arc hood assembly therefor

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Publication number Publication date
WO2016045718A1 (en) 2016-03-31
CN107533930B (en) 2019-04-05
US10224162B2 (en) 2019-03-05
EP3138111A1 (en) 2017-03-08
US20170309424A1 (en) 2017-10-26
CN107533930A (en) 2018-01-02

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