EP1374263A1 - Switching arrangement for low-voltage circuit breakers - Google Patents

Switching arrangement for low-voltage circuit breakers

Info

Publication number
EP1374263A1
EP1374263A1 EP02724107A EP02724107A EP1374263A1 EP 1374263 A1 EP1374263 A1 EP 1374263A1 EP 02724107 A EP02724107 A EP 02724107A EP 02724107 A EP02724107 A EP 02724107A EP 1374263 A1 EP1374263 A1 EP 1374263A1
Authority
EP
European Patent Office
Prior art keywords
contact
levers
switching
movable
carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02724107A
Other languages
German (de)
French (fr)
Other versions
EP1374263B1 (en
Inventor
Günter SEIDLER-STAHL;
Detlev Schmidt
Sezai TÜRKMEN
Michael Sebekow
Michael Bach
Ingo Thiede
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1374263A1 publication Critical patent/EP1374263A1/en
Application granted granted Critical
Publication of EP1374263B1 publication Critical patent/EP1374263B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars

Definitions

  • the invention relates to a switching arrangement for low-voltage circuit breakers with a high rated current, which essentially comprises movable switching contacts arranged on a movable contact carrier, fixed switching contacts and a device for cooling, deionizing and extinguishing the switching arc.
  • Low-voltage circuit breakers with a high rated current have a physically very wide contact system due to their function. This depends on the continuous current of the switch and not on its switching capacity, which is generally the same for all switches, regardless of their nominal current, and is dimensioned at a maximum of about 100 kA.
  • the rail cross-section and thus the width of the busbars and the contact system are therefore dimensioned according to the continuous current.
  • Commutation of the current causes a transition of the current from the main contact to the pre-contact. This results in a low continuous current heat, because the continuous current is led through the main contacts, which interact with the fixed counter contacts of the switch and not through during the switching process
  • Arcs are claimed. These main contacts are fire-proof and therefore retain a good surface, which half their contact resistance and thus the continuous current heating is low.
  • At least one movable arcing contact is provided, which is arranged between the end of at least one contact finger and the movable main contact.
  • This Movable arcing contacts work with a fixed one
  • Arcing contact together which is designed so that the arc is centered with respect to the center axis of the switching pole. This means that, as can be seen in particular in FIG. 2 of the patent specification, it is designed to be central and narrower than the fixed main contact.
  • Other arrangements have movable contacts in which not all contact levers are provided with pre-contacts. These contact levers, which are not provided with pre-contacts, are conventionally located on the outside of the multiple contact. This is the case, for example, with the low-voltage circuit breaker according to DE 197 27 696.
  • the object of the present invention is therefore to provide a switching arrangement for low-voltage circuit breakers with a high rated current, in which the considerable forces on the contact carrier caused by the large number of existing contact levers and their pressing forces are reduced, and in particular a more uniform distribution of the attacking forces the bearing pin of the contact lever is reached.
  • Switch contacts, fixed switching contacts and a device for cooling, deionizing and extinguishing the switching arc comprises, solved that one over the entire Contact width continuous fixed contact with pre-contact function is provided and the movable contact levers with and without pre-contact are arranged in a different order from the conventional arrangement, distributed over the entire width of the contact in a defined order.
  • the contact levers can be arranged in such a way that one contact lever with pre-contact and one contact lever without pre-contact are alternately provided over the entire width of the contact carrier.
  • the contact levers can also be distributed in such a way that they are provided in sections or packages, in that two or more contact levers with pre-contact and two or more contact levers without pre-contact are alternately provided in succession.
  • the contact levers or the contact lever packages are advantageously arranged symmetrically in such a way that contact levers are arranged on the outer sides of the contact carrier without any preliminary contact.
  • contact levers or the contact lever packages can also be expedient to arrange the contact levers or the contact lever packages symmetrically such that contact levers with pre-contact are arranged on the outer sides of the contact carrier.
  • FIG. 1 shows a movable contact carrier with multiple contacts, which is equipped according to the present invention.
  • Fig. 2 shows schematically the arrangement of the contact lever on the movable contact carrier under the arc quenching device in a first possible embodiment.
  • Fig. 3 shows schematically the arrangement of the contact lever on the movable contact carrier under the arc quenching device in a possible variant.
  • Fig. 1 shows a movable contact carrier 1 with multiple contact for a low-voltage circuit breaker for high rated currents, which has a plurality of movable contact levers 2, 3, which are parallel to each other at a small relative distance are arranged.
  • some of the contact levers 2 have a pre-contact 5 which is arranged between the end of the contact lever 2 designed as an arcing horn 6 and the main contact 4.
  • These movable pre-contacts 5, like the movable main contacts 4, interact in a known manner with fixed pre-contacts and main contacts, not shown.
  • the contact levers 3 which are not provided with preliminary contacts 5 are arranged in a defined order which differs from the conventional arrangement which is restricted to the outer regions and in which they are provided in sections or in packets.
  • the order is not limited to the order shown in the present example, in which, starting from one side of the contact carrier 1, two contact levers 3 without pre-contact 5 are followed by seven contact levers 2 with pre-contact 5 and then four contact levers 3 without pre-contact, seven contact levers 2 with pre-contact 5 and two contact levers 3 without pre-contact 5.
  • the different contact levers 2, 3 are arranged symmetrically on the contact carrier 1 for reasons of uniform force distribution. As a result, the bending stress and eventual deflection of the highly stressed bearing pin 12 of the contact levers 2, 3 are reduced or shifted away from the central region of the bearing pin 12 and the attacking bending forces are distributed more evenly.
  • FIG. 2 schematically shows the arrangement of the contact levers 2, 3 of the movable contact carrier 1, not shown, under the arc extinguishing device 7 in a first possible embodiment, in which the contact levers 2, 3, with or without a pre-contact 5, in a similar order as 1, are arranged in packets.
  • the contact levers 2, 3, with or without a pre-contact 5, in a similar order as 1 are arranged in packets.
  • the effective pre-contacts 5 shown here over the width of the contact carrier 1 and the resulting local distribution of the resulting partial switching arcs.
  • the cost of parallel extinguishing devices in the form of spatially separate units is reduced by designing partial extinguishing devices in an extinguishing room and the overall width of the switch is minimized.
  • FIG. 3 schematically shows the arrangement of the contact levers 2, 3 of the movable contact carrier 1, not shown, under the arc extinguishing device 11 in a possible variant, in which a contact lever 3 without a pre-contact 5 and a contact lever 2 with a pre-contact 5 alternate in the sequence are arranged continuously over the entire width of the contact carrier 1.
  • the design of the arc extinguishing device 11 here suitably corresponds to the substantially uniform distribution of the switching arc to be expected over the entire switching contact width.
  • the formation of the fixed contact across the entire rail width has a positive influence on the continuous current heating.
  • the larger amount of copper causes a higher temperature gradient and thus better heat dissipation.
  • the commutation of the current is significantly improved, which leads to better quenching behavior of the arc quenching device.

Abstract

A switching arrangement for low-voltage circuit breakers with a high nominal current, comprising moveable switching contacts (2,3) arranged essentially on a moveable contact carrier (1), fixed switching contacts and a device for cooling, de-ionizing and extinguishing an electric switching arc (7, 11). The fixed contact is provided with a pre-contact function over the entire contact width thereof. Moveable contact levers (2,3) are arranged according to a set pattern in a distributed manner over the entire width of the contact carriers and are provided with or without a pre-contact (5). A contact lever (2) with a pre-contact (5) and a contact lever (3) without a pre-contact can be provided successively. Similarly, two or more contact levers (2) with a pre-contact (5) and two or more contact levers (3) without a pre-contact can be successively and alternatingly provided in packet-form.

Description

Beschreibungdescription
Schaltanordnung für Miederspannungs-LeistungsschalterSwitching arrangement for low-voltage circuit breakers
Die Erfindung betrifft eine Schaltanordnung für Niederspan- nungs-Leistungsschalter mit hohem Nennstrom, die im Wesentlichen auf einem bewegbaren Kontaktträger angeordnete bewegbare Schaltkontakte, feststehende Schaltkontakte und eine Einrichtung zum Abkühlen, Entionisieren und Löschen des Schaltlicht- bogens umfasst.The invention relates to a switching arrangement for low-voltage circuit breakers with a high rated current, which essentially comprises movable switching contacts arranged on a movable contact carrier, fixed switching contacts and a device for cooling, deionizing and extinguishing the switching arc.
Niederspannungs-Leistungsschalter mit hohem Nennstrom weisen funktionsbedingt ein körperlich sehr breites Kontaktsystem auf. Das ist abhängig vom Dauerstrom des Schalters und nicht von seinem Schaltvermögen, das für alle Schalter, unabhängig von deren Nennstrom, im allgemeinen gleich und auf etwa maximal 100 kA bemessen ist. Der Schienenquerschnitt und somit auch die Breite der Stromschienen sowie des Kontaktsystems sind folglich nach dem Dauerstrom bemessen. Bei derartigen KontaktSystemen sind die bewegbaren Kontakte als Vielfac -Low-voltage circuit breakers with a high rated current have a physically very wide contact system due to their function. This depends on the continuous current of the switch and not on its switching capacity, which is generally the same for all switches, regardless of their nominal current, and is dimensioned at a maximum of about 100 kA. The rail cross-section and thus the width of the busbars and the contact system are therefore dimensioned according to the continuous current. With such contact systems, the movable contacts are
KontaktSysteme mit einer bestimmten Anzahl gleicher Kontakt- hebel ausgebildet. Diese Kontakthebel sind herkömmlich, außer mit ihrem Hauptkontakt, zusätzlich mit einem Vorkontakt und einem Lichtbogenhorn versehen. Durch diese Formgebung wird bei der Abhebbewegung des bewegbaren Schaltkontaktes eineContact systems designed with a certain number of identical contact levers. In addition to their main contact, these contact levers are also provided with a pre-contact and an arcing horn. Due to this shape, a during the lifting movement of the movable switching contact
Kommutierung des Stromes bewirkt, also ein Übergang des Stromes vom Hauptkontakt zum Vorkontakt. Dadurch ergibt sich eine geringe Dauerstromwärme, weil der Dauerstrom durch die Hauptkontakte geführt wird, die mit den festen Gegenkontakten des Schalters zusammenwirken und beim Schaltvorgang nicht durchCommutation of the current causes a transition of the current from the main contact to the pre-contact. This results in a low continuous current heat, because the continuous current is led through the main contacts, which interact with the fixed counter contacts of the switch and not through during the switching process
Lichtbögen beansprucht werden. Diese Hauptkontakte sind ab- brandsicher und behalten dadurch eine gute Oberfläche, wes- halb ihr Übergangswiderstand und damit die Dauerstromerwärmung niedrig ist.Arcs are claimed. These main contacts are fire-proof and therefore retain a good surface, which half their contact resistance and thus the continuous current heating is low.
Bei Leistungsschaltern für hohe und höchste Beanspruchung, zum Beispiel bei strombegrenzenden Leistungsschaltern wirken durch die Vielzahl der vorhandenen Kontakthebel und deren An- druckkräfte erhebliche Kräfte auf den Kontaktträger, insbesondere auch auf die Lagerung der Kontakthebel im Kontaktträger, wodurch unter Umständen die Grenzen der Werkstoffbelast- barkeit schnell erreicht werden. Deshalb ist es wünschenswert, die Summe der Kontaktkräfte aller auf einem Gelenkbolzen angeordneten Kontakthebel auf den Kontaktträger zu verringern. Bei den bekannten herkömmlichen Niederspannungs- Leistungsschaltern ist es deshalb üblich, auf der feststehen- den Kontaktseite einen Vorkontakt anzuordnen, der aufgrund seiner Dimensionierung bewirkt, dass nur eine bestimmte Anzahl von Kontakthebeln des bewegbaren Kontaktes eine Kontakt- berührung mit ihm hat. Dieser feststehende Vorkontakt ist bei herkömmlichen Niederspannungs-Leistungsschaltern schmaler als der Hauptkontakt und mittig zur gesamten Kontaktbreite angeordnet .In circuit breakers for high and extreme loads, for example in current-limiting circuit breakers, the large number of existing contact levers and their contact forces exert considerable forces on the contact carrier, in particular also on the mounting of the contact levers in the contact carrier, which may limit the material load can be reached quickly. It is therefore desirable to reduce the sum of the contact forces on the contact carrier of all the contact levers arranged on a hinge pin. In the known conventional low-voltage circuit breakers, it is therefore customary to arrange a pre-contact on the fixed contact side, which due to its dimensioning means that only a certain number of contact levers of the movable contact have contact with it. In conventional low-voltage circuit breakers, this fixed pre-contact is narrower than the main contact and centered on the entire contact width.
Eine derartige Anordnung ist beispielsweise in der EP 0 410 902 Bl dargestellt. Hier ist ein Niederspannungs- Leistungsschalter mit einem bewegbaren Mehrfachkontakt für hohe Nennstrδme gezeigt, der mehrere Kontaktfinger gleicher Länge aufweist, die in geringem relativen Abstand parallel zueinander angeordnet sind und ein feststehender Hauptkontakt, der in der Einschaltstellung mit einem bewegbaren Hauptkontakt jedes einzelnen Kontaktfingers zusammenwirkt.Such an arrangement is shown, for example, in EP 0 410 902 B1. Here, a low-voltage circuit breaker with a movable multiple contact for high nominal currents is shown, which has several contact fingers of the same length, which are arranged parallel to each other at a small relative distance, and a fixed main contact, which in the closed position interacts with a movable main contact of each individual contact finger.
Weiterhin ist mindestens ein bewegbarer Lichtbogenkontakt vorgesehen, der zwischen dem Ende mindestens eines Kontaktfingers und dem bewegbaren Hauptkontakt angeordnet ist. Diese bewegbaren Lichtbogenkontakte wirken mit einem feststehendenFurthermore, at least one movable arcing contact is provided, which is arranged between the end of at least one contact finger and the movable main contact. This Movable arcing contacts work with a fixed one
Lichtbogenkontakt zusammen, der so ausgeführt ist, dass der Lichtbogen in Bezug auf die Mittelachse des Schaltpoles zentriert wird. Das bedeutet, dass er, wie insbesondere in der Fig. 2 der Patentschrift zu erkennen ist, zentral und schmaler ausgebildet ist, als der feststehende Hauptkontakt. Andere Anordnungen weisen bewegbare Kontakte auf , bei denen nicht alle Kontakthebel mit Vorkontakten versehen sind. Dabei befinden sich diese nicht mit Vorkontakten versehenen Kontakt- hebel herkömmlich an den Außenseiten des Vielfachkontaktes. Das ist beispielsweise bei dem Niederspannungs-Leistungs- schalter nach der DE 197 27 696 der Fall.Arcing contact together, which is designed so that the arc is centered with respect to the center axis of the switching pole. This means that, as can be seen in particular in FIG. 2 of the patent specification, it is designed to be central and narrower than the fixed main contact. Other arrangements have movable contacts in which not all contact levers are provided with pre-contacts. These contact levers, which are not provided with pre-contacts, are conventionally located on the outside of the multiple contact. This is the case, for example, with the low-voltage circuit breaker according to DE 197 27 696.
Alle diese Anordnungen weisen den Nachteil auf, dass die Bie- gebeanspruchung des Lagerbolzens der bewegbaren Kontakthebel durch die vorwiegend mittige Krafteinwirkung derselben besonders hoch ist.All of these arrangements have the disadvantage that the bending stress on the bearing pin of the movable contact levers is particularly high due to the predominantly central action of the force.
Die Aufgabe der vorliegenden Erfindung besteht deshalb darin, eine Schaltanordnung für Niederspannungs-Leistungsschalter mit hohem Nennstrom zu schaffen, bei welcher die durch die Vielzahl der vorhandenen Kontakthebel und deren Andruckkräfte bedingten erheblichen Kräfte auf den Kontaktträger verringert werden und insbesondere eine gleichmäßigere Verteilung der angreifenden Kräfte auf den Lagerbolzen der Kontakthebel erreicht wird.The object of the present invention is therefore to provide a switching arrangement for low-voltage circuit breakers with a high rated current, in which the considerable forces on the contact carrier caused by the large number of existing contact levers and their pressing forces are reduced, and in particular a more uniform distribution of the attacking forces the bearing pin of the contact lever is reached.
Diese Aufgabe wird bei einer Schaltanordnung für Niederspan- nungs-Leistungsschalter mit hohem Nennstrom, die im Wesentli- chen auf einem bewegbaren Kontaktträger angeordnete bewegbareThis object is achieved in a switching arrangement for low-voltage circuit breakers with a high rated current, which are arranged essentially on a movable contact carrier
Schaltkontakte, feststehende Schaltkontakte und eine Einrichtung zum Abkühlen, Entionisieren und Löschen des Schaltlichtbogens umfasst, dadurch gelöst, dass ein über die gesamte Kontaktbreite durchgängiger Festkontakt mit Vorkontaktfunk- tion vorgesehen ist und die bewegbaren Kontakthebel mit und ohne Vorkontakt, in einer von der herkömmlichen Anordnung unterschiedlichen Art, über die gesamte Breite des Kontaktes in einer definierten Reihenfolge verteilt angeordnet sind. Das heißt, dass die Kontakthebel ohne Vorkontakt, die herkömmlich nur an den äußeren Seiten der bewegbaren Schaltkontakte angeordnet sind, über die gesamte Breite des bewegbaren Kontakt- trägers verteilt vorgesehen werden, also auch im mittleren Bereich. Dabei kann die Anordnung der Kontakthebel so erfolgen, dass über die gesamte Breite des Kontaktträgers im Wechsel jeweils ein Kontakthebel mit Vorkontakt und ein Kontakt- hebel ohne Vorkontakt aufeinanderfolgend vorgesehen werden.Switch contacts, fixed switching contacts and a device for cooling, deionizing and extinguishing the switching arc comprises, solved that one over the entire Contact width continuous fixed contact with pre-contact function is provided and the movable contact levers with and without pre-contact are arranged in a different order from the conventional arrangement, distributed over the entire width of the contact in a defined order. This means that the contact levers without pre-contact, which are conventionally arranged only on the outer sides of the movable switching contacts, are provided distributed over the entire width of the movable contact carrier, that is to say also in the central region. The contact levers can be arranged in such a way that one contact lever with pre-contact and one contact lever without pre-contact are alternately provided over the entire width of the contact carrier.
Die Verteilung der Kontakthebel kann aber auch so erfolgen, dass sie abschnittsweise oder paketweise vorgesehen werden, indem aufeinanderfolgend abwechselnd zwei oder mehr Kontakt- hebel mit Vorkontakt und zwei oder mehr Kontakthebel ohne Vorkontakt vorgesehen werden.However, the contact levers can also be distributed in such a way that they are provided in sections or packages, in that two or more contact levers with pre-contact and two or more contact levers without pre-contact are alternately provided in succession.
Vorteilhaft werden die Kontakthebel oder die Kontakthebel- pakete derart symmetrisch angeordnet, dass an den Außenseiten des Kontaktträgers jeweils Kontakthebel ohne Vorkontakt angeordnet sind.The contact levers or the contact lever packages are advantageously arranged symmetrically in such a way that contact levers are arranged on the outer sides of the contact carrier without any preliminary contact.
Es kann aber auch zweckmäßig sein, die Kontakthebel oder die Kontakthebelpakete symmetrisch so anzuordnen, dass an den Außenseiten des Kontaktträgers jeweils Kontakthebel mit Vorkontakt angeordnet sind.However, it can also be expedient to arrange the contact levers or the contact lever packages symmetrically such that contact levers with pre-contact are arranged on the outer sides of the contact carrier.
Dadurch wird die Biegebeanspruchung und eventuelle Durchbiegung des hochbeanspruchten Lagerbolzens der Kontakthebel ver- ringert bzw. vom Mittelbereich weg verlagert und die Biegekräfte werden gleichmäßiger verteilt.As a result, the bending stress and any deflection of the highly stressed bearing pin of the contact levers is wrestles or shifts away from the central area and the bending forces are distributed more evenly.
Bei einer derartigen Verteilung der wirksamen Vorkontakte ü- ber die Breite des Kontaktträgers und die dadurch bedingte örtliche Verteilung der Teilschaltlichtbögen ist es möglich, eine Unterteilung der Gesamtlöscheinrichtung in nebeneinander angeordnete Teillöscheinrichtungen mit mehreren Fußpunkten für den Schaltlichtbogen zu realisieren. Hierdurch wird der Aufwand paralleler Löscheinrichtungen in räumlich getrennte Einheiten durch die Gestaltung von Teillöscheinrichtungen in einem Löschraum verringert und die Baubreite des Schalters wird minimiert .With such a distribution of the effective pre-contacts over the width of the contact carrier and the resulting local distribution of the partial switching arcs, it is possible to realize a subdivision of the overall extinguishing device into side-by-side partial extinguishing devices with several base points for the switching arc. As a result, the outlay of parallel extinguishing devices in spatially separate units is reduced by the design of partial extinguishing devices in an extinguishing room and the overall width of the switch is minimized.
Die Erfindung soll nachfolgend zum besseren Verständnis anhand eines bevorzugten, den Schutzumfang nicht einschränkenden Ausführungsbeispiels näher erläutert werden.For a better understanding, the invention will be explained in more detail below with the aid of a preferred exemplary embodiment which does not restrict the scope of protection.
Die Fig. 1 zeigt einen gemäß der vorliegenden Erfindung be- stückten bewegbaren Kontaktträger mit Mehrfachkontakt.1 shows a movable contact carrier with multiple contacts, which is equipped according to the present invention.
Die Fig. 2 zeigt schematisch die Anordnung der Kontakthebel auf dem bewegbaren Kontaktträger unter der Lichtbogenlöscheinrichtung in einer ersten möglichen Ausführung.Fig. 2 shows schematically the arrangement of the contact lever on the movable contact carrier under the arc quenching device in a first possible embodiment.
Die Fig. 3 zeigt schematisch die Anordnung der Kontakthebel auf dem bewegbaren Kontaktträger unter der Lichtbogenlöscheinrichtung in einer möglichen Variante.Fig. 3 shows schematically the arrangement of the contact lever on the movable contact carrier under the arc quenching device in a possible variant.
Die Fig. 1 zeigt einen bewegbaren Kontaktträger 1 mit Mehrfachkontakt für einen Niederspannungs-Leistungsschalter für hohe Nennströme, der mehrere bewegbare Kontakthebel 2, 3 aufweist, die in geringem relativen Abstand parallel zueinander angeordnet sind. Dabei weist ein Teil der Kontakthebel 2 außer dem Hauptkontakt 4 einen Vorkontakt 5 auf, der zwischen dem als Lichtbogenhorn 6 ausgebildeten Ende des Kontakthebels 2 und dem Hauptkontakt 4 angeordnet ist. Diese bewegbaren Vorkontakte 5 wirken, ebenso wie die bewegbaren Hauptkontakte 4 in bekannter Weise mit nicht dargestellten feststehenden Vor- und Hauptkontakten zusammen. Erfindungsgemäß sind die nicht mit Vorkontakten 5 versehenen Kontakthebel 3 in einer von der herkömmlichen, auf die äußeren Bereiche beschränkten, Anordnung abweichenden, definierten Reihenfolge angeordnet, bei der sie abschnittsweise oder paketweise vorgesehen sind. Dabei ist die Reihenfolge nicht auf die im vorliegenden Beispiel dargestellte Reihenfolge beschränkt, bei welcher, angefangen von einer Seite des Kontaktträgers 1, auf zwei Kon- takthebel 3 ohne Vorkontakt 5 sieben Kontakthebel 2 mit Vorkontakt 5 folgen und darauf wieder vier Kontakthebel 3 ohne Vorkontakt, sieben Kontakthebel 2 mit Vorkontakt 5 sowie zwei Kontakthebel 3 ohne Vorkontakt 5. Dabei sind die unterschiedlichen Kontakthebel 2, 3 auf dem Kontaktträger 1 aus Gründen einer gleichmäßigen Kräfteverteilung symmetrisch angeordnet. Dadurch wird die Biegebeanspruchung und eventuelle Durchbiegung des hochbeanspruchten Lagerbolzens 12 der Kontakthebel 2, 3 verringert bzw. vom Mittelbereich des Lagerbolzens 12 weg verlagert und die angreifenden Biegekräfte werden gleich- mäßiger verteilt.Fig. 1 shows a movable contact carrier 1 with multiple contact for a low-voltage circuit breaker for high rated currents, which has a plurality of movable contact levers 2, 3, which are parallel to each other at a small relative distance are arranged. In addition to the main contact 4, some of the contact levers 2 have a pre-contact 5 which is arranged between the end of the contact lever 2 designed as an arcing horn 6 and the main contact 4. These movable pre-contacts 5, like the movable main contacts 4, interact in a known manner with fixed pre-contacts and main contacts, not shown. According to the invention, the contact levers 3 which are not provided with preliminary contacts 5 are arranged in a defined order which differs from the conventional arrangement which is restricted to the outer regions and in which they are provided in sections or in packets. The order is not limited to the order shown in the present example, in which, starting from one side of the contact carrier 1, two contact levers 3 without pre-contact 5 are followed by seven contact levers 2 with pre-contact 5 and then four contact levers 3 without pre-contact, seven contact levers 2 with pre-contact 5 and two contact levers 3 without pre-contact 5. The different contact levers 2, 3 are arranged symmetrically on the contact carrier 1 for reasons of uniform force distribution. As a result, the bending stress and eventual deflection of the highly stressed bearing pin 12 of the contact levers 2, 3 are reduced or shifted away from the central region of the bearing pin 12 and the attacking bending forces are distributed more evenly.
Die Fig. 2 zeigt schematisch die Anordnung der Kontakthebel 2, 3 des nicht dargestellten bewegbaren Kontaktträgers 1 unter der Lichtbogenlöscheinrichtung 7 in einer ersten mögli- chen Ausführung, bei welcher die Kontakthebel 2, 3, mit oder ohne Vorkontakt 5, in einer ähnlichen Reihenfolge wie in der Fig. 1, paketweise angeordnet sind. Bei der hier dargestellten Verteilung der wirksamen Vorkontakte 5 über die Breite des Kontaktträgers 1 und die dadurch bedingte örtliche Verteilung der entstehenden Teilschaltlichtbögen ist es möglich, eine Unterteilung der Gesamtlöscheinrichtung 7 in nebeneinander angeordnete Teillöscheinrichtungen 8, 9, 10 mit mehreren Fußpunkten 13, 14, 15, 16 für den Schaltlichtbogen zu realisieren. Hierdurch wird der Aufwand paralleler Löscheinrichtungen in Form räumlich getrennter Einheiten durch die Gestaltung von Teillöscheinrichtungen in einem Löschraum verringert und die Baubreite des Schalters wird minimiert.2 schematically shows the arrangement of the contact levers 2, 3 of the movable contact carrier 1, not shown, under the arc extinguishing device 7 in a first possible embodiment, in which the contact levers 2, 3, with or without a pre-contact 5, in a similar order as 1, are arranged in packets. In the distribution of the effective pre-contacts 5 shown here over the width of the contact carrier 1 and the resulting local distribution of the resulting partial switching arcs, it is possible to subdivide the overall extinguishing device 7 into partial extinguishing devices 8, 9, 10 arranged next to one another with a plurality of base points 13, 14, 15, 16 for the switching arc. As a result, the cost of parallel extinguishing devices in the form of spatially separate units is reduced by designing partial extinguishing devices in an extinguishing room and the overall width of the switch is minimized.
Die Fig. 3 zeigt schematisch die Anordnung der Kontakthebel 2, 3 des nicht dargestellten bewegbaren Kontaktträgers 1 unter der Lichtbogenlöscheinrichtung 11 in einer möglichen Variante, bei welcher in der Folge abwechselnd jeweils ein Kon- takthebel 3 ohne Vorkontakt 5 und ein Kontakthebel 2 mit Vorkontakt 5 fortlaufend über die Gesamtbreite des Kontaktträgers 1 angeordnet sind. Die Ausbildung der Lichtbogenlöscheinrichtung 11 entspricht hier zweckmäßig der zu erwartenden im Wesentlichen gleichmäßigen Verteilung des Schaltlichtbo- gens über die gesamte Schaltkontaktbreite.3 schematically shows the arrangement of the contact levers 2, 3 of the movable contact carrier 1, not shown, under the arc extinguishing device 11 in a possible variant, in which a contact lever 3 without a pre-contact 5 and a contact lever 2 with a pre-contact 5 alternate in the sequence are arranged continuously over the entire width of the contact carrier 1. The design of the arc extinguishing device 11 here suitably corresponds to the substantially uniform distribution of the switching arc to be expected over the entire switching contact width.
Durch die gleichmäßige Verteilung der unterschiedlichen Kontakthebel über die gesamte Breite des Kontaktträgers und eine dadurch gegebenenfalls mögliche Verringerung der Anzahl der mit Vorkontakten zu versehenden Kontakthebel, wird die Polrückwirkung bei der ersten Kontaktberührung verringert, weshalb die erforderliche Leistung des Einschaltspeichers gesenkt werden kann. Daraus resultiert eine geringere Belastung aller mechanischen Bauteile des Antriebssystems, beziehungs- weise eine Erhöhung der mechanischen Lebensdauer. Durch dieDue to the uniform distribution of the different contact levers over the entire width of the contact carrier and a possible reduction in the number of contact levers to be provided with pre-contacts, the pole reaction at the first contact touch is reduced, which is why the required power of the switch-on memory can be reduced. This results in a lower load on all mechanical components of the drive system, or an increase in the mechanical service life. Through the
Ausbildung des Festkontaktes über die gesamte Schienenbreite wird die Dauerstromerwärmung positiv beeinflusst. Die größere Kupfermenge bewirkt einen höheren Temperaturgradienten und damit eine bessere Wärmeableitung. Die Kommutierung des Stromes wird deutlich verbessert, was zu einem besseren Lδschver- halten der Lichtbogenlöscheinrichtung führt. The formation of the fixed contact across the entire rail width has a positive influence on the continuous current heating. The larger amount of copper causes a higher temperature gradient and thus better heat dissipation. The commutation of the current is significantly improved, which leads to better quenching behavior of the arc quenching device.

Claims

Patentansprüche claims
1. Schaltanordnung für Niederspannungs-Leistungsschalter mit hohem Nennstrom, die im Wesentlichen auf einem bewegbaren Kontaktträger (1) angeordnete bewegbare Schaltkontakte (2, 3), feststehende Schaltkontakte und eine Einrichtung zum Abkühlen, Entionisieren und Löschen des Schaltlichtbogens (7, 11) umfasst, d a d u r c h g e k e n n z e i c h n e t , dass ein über die gesamte Kontaktbreite durchgängiger Festkontakt mit Vorkontaktfunktion vorgesehen ist und die bewegbaren Kontakthebel (2, 3) mit und ohne Vorkontakt (5) über die gesamte Breite des Kontaktträgers (1) in einer definierten Reihenfolge verteilt angeordnet sind.1.Switching arrangement for low-voltage circuit breakers with a high rated current, which essentially comprises movable switching contacts (2, 3) arranged on a movable contact carrier (1), fixed switching contacts and a device for cooling, deionizing and extinguishing the switching arc (7, 11), characterized in that a fixed contact with pre-contact function is provided over the entire contact width and the movable contact levers (2, 3) with and without pre-contact (5) are arranged in a defined sequence distributed over the entire width of the contact carrier (1).
2. Schaltanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die bewegbaren Kontakthebel (2, 3) so angeordnet sind, dass über die gesamte Breite des Kontaktträgers (1) im Wech- sei jeweils ein Kontakthebel (2) mit Vorkontakt (5) und ein Kontakthebel (3) ohne Vorkontakt aufeinanderfolgend vorgesehen sind.2. Switching arrangement according to claim 1, characterized in that the movable contact levers (2, 3) are arranged so that over the entire width of the contact carrier (1) alternately be a contact lever (2) with pre-contact (5) and a contact lever (3) are provided in succession without prior contact.
3. Schaltanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die bewegbaren Kontakthebel (2, 3) so angeordnet sind, dass aufeinanderfolgend abwechselnd zwei oder mehr Kontakthebel (2) mit Vorkontakt (5) und zwei oder mehr Kontakthebel (3) ohne Vorkontakt paketweise vorgesehen sind. 3. Switching arrangement according to claim 1, characterized in that the movable contact levers (2, 3) are arranged such that two or more contact levers (2) with pre-contact (5) and two or more contact levers (3) without a pre-contact are alternately provided in packages ,
4. Schaltanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die bewegbaren Kontakthebel (2, 3) oder die Kontakthebelpakete derart symmetrisch angeordnet sind, dass an den Au- ßenseiten des Kontaktträgers (1) jeweils Kontakthebel (3) ohne Vorkontakt angeordnet sind.4. Switching arrangement according to claim 1, so that the movable contact levers (2, 3) or the contact lever packages are arranged symmetrically in such a way that contact levers (3) are arranged on the outside of the contact carrier (1) in each case without pre-contact.
5. Schal tanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die bewegbaren Kontakthebel (2, 3) oder die Kontakthebelpakete derart symmetrisch angeordnet sind, dass an den Außenseiten des Kontaktträgers (1) jeweils Kontakthebel (2) mit Vorkontakt (5) angeordnet sind.5. Switching arrangement according to claim 1, so that the movable contact levers (2, 3) or the contact lever packs are arranged symmetrically such that contact levers (2) with pre-contact (5) are arranged on the outside of the contact carrier (1).
6. Schaltanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die Gesamtlichtbogenlöscheinrichtung (7) in Form von nebeneinander angeordneten Teillichtbogenlöscheinrichtungen (8, 9, 10) mit mehreren Fußpunkten (13, 14, 15, 16) für den Schaltlichtbogen ausgebildet ist. 6. Switching arrangement according to claim 1, so that the overall arc extinguishing device (7) is designed in the form of side-by-side partial arc extinguishing devices (8, 9, 10) with a plurality of base points (13, 14, 15, 16) for the switching arc.
EP02724107A 2001-04-04 2002-03-12 Switching arrangement for low-voltage circuit breakers Expired - Fee Related EP1374263B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117844 2001-04-04
DE10117844A DE10117844A1 (en) 2001-04-04 2001-04-04 Circuit arrangement for low voltage circuit breakers
PCT/DE2002/000935 WO2002082482A1 (en) 2001-04-04 2002-03-12 Switching arrangement for low-voltage circuit breakers

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EP1374263A1 true EP1374263A1 (en) 2004-01-02
EP1374263B1 EP1374263B1 (en) 2008-05-07

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US (1) US6969816B2 (en)
EP (1) EP1374263B1 (en)
JP (1) JP2004523874A (en)
CN (1) CN1230845C (en)
DE (3) DE10117844A1 (en)
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WO (1) WO2002082482A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004020654A1 (en) * 2004-04-22 2005-11-10 Siemens Ag Switching contact arrangement
DE102005047740A1 (en) * 2005-09-29 2007-04-05 Siemens Ag Main power supply switchboard has telemetry unit monitoring, e.g. contact force, delay, response time, pole return, selector shaft angle, vibration and temperature
DE102007001471A1 (en) 2007-01-05 2008-07-10 Siemens Ag Electrical switching device for use in low-voltage circuit-breaker, has contact lever linearly guided for closing interfaces during switching movement of lever in point and guided in rotation movement of lever in same point
CN100514525C (en) * 2007-08-08 2009-07-15 常熟开关制造有限公司(原常熟开关厂） Movable contact of circuit breaker
KR101704989B1 (en) * 2015-04-30 2017-02-10 현대중공업 주식회사 Movable contact of circuit breaker

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2036188A5 (en) 1969-03-06 1970-12-24 Seita
FR2650434B1 (en) 1989-07-26 1995-11-24 Merlin Gerin LOW VOLTAGE CIRCUIT BREAKER WITH MULTIPLE CONTACTS AND HIGH CURRENTS
IT1289483B1 (en) 1996-12-20 1998-10-15 Sace Spa ELECTRIC SWITCH WITH MEANS FOR THE REGULATION OF THE CONTACTS
DE19727696B4 (en) 1997-06-20 2007-09-13 Siemens Ag Movable switch contact for low-voltage circuit breaker
US5874699A (en) * 1997-09-18 1999-02-23 Eaton Corporation Molded case circuit breaker and moving conductor assembly therefor
US5898146A (en) * 1997-09-18 1999-04-27 Eaton Corporation Molded case circuit breaker with modular crossbar
US5994988A (en) * 1997-09-23 1999-11-30 Siemens Energy & Automation, Inc. Movable contact structure for a circuit breaker, including crossbar and spring biased cam mechanism
US6005206A (en) * 1998-05-07 1999-12-21 Eaton Corporation Electrical switching apparatus with improved contact arm carrier arrangement
DE20100490U1 (en) * 2001-01-05 2001-03-29 Siemens Ag Movable contact carrier for holding contact levers for low-voltage circuit breakers
US6376788B1 (en) * 2001-01-08 2002-04-23 Eaton Corporation Magnetically collapsible toggle linkage for electrical switching apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02082482A1 *

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HK1062355A1 (en) 2004-10-29
EP1374263B1 (en) 2008-05-07
CN1230845C (en) 2005-12-07
DE10117844A1 (en) 2002-10-17
WO2002082482A1 (en) 2002-10-17
DE20118493U1 (en) 2002-02-21
US6969816B2 (en) 2005-11-29
CN1505824A (en) 2004-06-16
US20040094513A1 (en) 2004-05-20
JP2004523874A (en) 2004-08-05
DE50212227D1 (en) 2008-06-19

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