EP0920703A1 - Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing - Google Patents

Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing

Info

Publication number
EP0920703A1
EP0920703A1 EP97941834A EP97941834A EP0920703A1 EP 0920703 A1 EP0920703 A1 EP 0920703A1 EP 97941834 A EP97941834 A EP 97941834A EP 97941834 A EP97941834 A EP 97941834A EP 0920703 A1 EP0920703 A1 EP 0920703A1
Authority
EP
European Patent Office
Prior art keywords
bearing
contact
circuit breaker
contact arrangement
lever 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
EP97941834A
Other languages
German (de)
French (fr)
Other versions
EP0920703B1 (en
Inventor
Sezai TÜRKMEN
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 EP0920703A1 publication Critical patent/EP0920703A1/en
Application granted granted Critical
Publication of EP0920703B1 publication Critical patent/EP0920703B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts

Definitions

  • the invention relates to a movable contact arrangement for a low-voltage circuit breaker with contact levers and a contact lever carrier receiving the contact levers and with a stationary conductor piece which is connected to the contact levers by flexible conductors, the contact lever carrier being movable about a pivot bearing arranged in the region of the stationary conductor piece is, which comprises a bearing pin formed on the contact lever carrier and a stationary bearing opening arranged in a housing body of the low-voltage circuit breaker.
  • FIG. 5 additionally shows a view of a contact lever carrier 2 equipped with contact levers 1 of a circuit breaker corresponding to the aforementioned DE 44 16 105 Cl. Then both side cheeks 3 of the contact lever carrier 2 are provided with an outwardly projecting bearing pin 4 which engages in a bearing opening 5 of a broken-off indicated housing body 6 of the circuit breaker.
  • this arrangement requires a corresponding amount of space.
  • the broken-off partition walls 7 between the adjacent poles must therefore correspond to the axial depth of both bearing openings plus a sufficient space Have thickness.
  • the described design of the pivot bearing therefore affects the width of the circuit breaker.
  • the invention has for its object to provide a robust pivot bearing for the contact lever carrier based on a contact arrangement of the type mentioned does not require an increase in the width of the contact arrangement beyond what is necessary for reasons of electrical dimensioning.
  • this object is achieved in that the contact lever carrier has only an approximately centrally arranged journal with a length not exceeding the width of the movable contact arrangement and that at least one bearing opening is also arranged within the width dimension of the movable contact arrangement.
  • the pivoting angle of the contact lever carrier when the circuit breaker is switched on and off is relatively small. Therefore, it is possible in itself to design the entire end region of the contact lever carrier as a journal.
  • a main arm of the contact lever carrier, which carries the bearing journal can be tapered in the direction of the bearing journal, the bearing journal is divided into two lateral journal areas and that each journal area is assigned a bearing opening. In this way, the largest possible span is achieved and thus enables a tolerance-free storage with relatively little effort.
  • the bearing opening or. the bearing openings have a polygonal cross-sectional shape or. exhibit .
  • B a square, hexagonal or octagonal cross-sectional shape.
  • the bearing opening or. can the bearing openings by interacting recesses or. Surfaces are formed by two separable assemblies of the low-voltage circuit breaker. In this way, the complete bearing openings only arise when the housing body is assembled, which facilitates the assembly of the contact lever carrier.
  • the one assembly can be formed by the housing body of the circuit breaker mentioned and the further assembly can be formed by the stationary conductor piece that at least locally covers the recess.
  • FIG. 1 shows a movable contact arrangement in a partially sectioned side view.
  • FIG. 2 shows the contact arrangement according to FIG. 1 with a view of the contacting side of contact levers.
  • FIGS 3 and 4 show details of bearing openings.
  • FIG. 5 shows a movable contact arrangement as used in a circuit breaker according to DE 44 16 105, in a representation corresponding to FIG. 2.
  • the movable contact arrangement 10 shown in a side view in FIG. 1 belongs to a low-voltage circuit breaker 11, which is only indicated as an outline.
  • the contact arrangement 11 comprises a contact lever carrier 12, which is formed in one piece or in several parts and which can be made entirely or partially of insulating plastic .
  • a plurality of parallel contact levers 13 are preferably pivotably attached to the contact lever carrier 12 by means of a bearing pin 14.
  • the contact levers 13 are connected by means of a flexible conductor cable 16 or a plurality of such conductor cables to a stationary conductor piece 17, which can in particular be designed as a lower connecting rail which protrudes from a housing of the circuit breaker 11. Together with an upper connecting rail approximately opposite the contact levers 13 (cf. likewise the aforementioned DE 44 16 105 Cl), the contact levers 13, the conductor cables 16 and the lower stationary conductor piece 17 form the current path of a pole of the circuit breaker 11.
  • the contact lever carrier 12 executes a pivoting movement indicated by a double arrow 20, which is caused by a schematically indicated drive device 21.
  • the drive device 21 is connected to the contact lever carrier 12 on its rear side opposite the contact levers 13 by an articulated coupling linkage 22.
  • a pivot bearing, designated as a whole, for the contact lever carrier 12 is located near the stationary conductor piece 17 and comprises a cylindrical bearing pin 25 arranged at the lower end of a main arm 24 of the contact lever carrier 12 and at least one bearing opening 26.
  • the bearing journal can take up the entire available width of the contact arrangement 10, which essentially corresponds to the width of the stationary conductor piece 17.
  • the Main arm 24 of the contact lever carrier 12 in the direction of the
  • Bearing pin 25 may be tapered in accordance with the dashed illustration. This will make two side
  • Pin regions 29 and 30 are formed, each of which is assigned its own bearing opening 31 and 32, respectively.
  • the bearing opening 26 is practically completely accommodated in a housing body 27 and is formed by a recess 28 of rectangular cross-sectional shape in connection with the conductor piece 17.
  • the depth of the recess 28 corresponds at least to the diameter of the bearing pin 24.
  • the conductor piece 17 covers the recess 28 only locally and only to the extent that the bearing pin 25 is prevented from leaving the bearing opening 26. This arrangement has the advantage that when the conductor piece 17 is loosened, the contact lever carrier 12 is released at the same time, and assembly and disassembly during manufacture and maintenance is therefore facilitated.
  • FIG. 3 shows a bearing opening 33 with a hexagonal cross-sectional shape, which is formed by symmetrical recesses in two joined housing bodies 34 and 35.
  • a bearing opening 36 with an octagonal shape according to FIG. 4 can be used analogously.
  • the pivot bearing 23 is located near the inner end of the conductor piece 17 and below it.
  • other arrangements in the area of the conductor piece 17 are also possible, for example in the extension of the conductor piece 17 or directly above the same. In these cases, the conductor piece 17 cannot be used as a cover or delimitation of the relevant bearing opening. It is then advisable to use an arrangement corresponding to FIGS. 3 and 4, in which the bearing openings are delimited by two housing bodies.

Landscapes

  • Breakers (AREA)

Abstract

The invention concerns a movable contact arrangement (10) for a low-voltage circuit breaker (11). The contact arrangement comprises a contact lever carrier (12) equipped with contact levers (13), and can be moved by a drive device (21) about a pivot bearing (23) for switching on and off. Integrally formed on a main arm (24) of the contact lever carrier (12) is a bearing journal (25) which engages in a bearing opening (26) close to the inner end of a stationary conductor part (17). The bearing journal (25) is disposed approximately centrally and its length is not greater than the width of the contact arrangement (10). The bearing opening (26) is also disposed within the width of the contact arrangement (10). As a result, the width of the circuit breaker (11) is reduced, in particular for multipole configurations and, at the same time, the loading capacity and useful life of the pivot bearing (23) are improved.

Description

Beschreibungdescription
Bewegbare Kontaktanordnung für einen Niederspannungs- Leistungsschalter mit einem SchwenklagerMovable contact arrangement for a low-voltage circuit breaker with a pivot bearing
Die Erfindung betrifft eine bewegbare Kontaktanordnung für einen Niederspannungs-Leistungsschalter mit Kontakthebeln und einem die Kontakthebel aufnehmenden Kontakthebelträger sowie mit einem ortsfesten Leiterstück, das mit den Kontakthebeln durch biegsame Leiter verbunden ist, wobei der Kontakt- hebelträger um ein im Bereich des ortsfesten Leiterstückes angeordnetes Schwenklager bewegbar ist, das einen an den Kontakthebelträger angeformten Lagerzapfen und eine ortsfeste, in einem Gehäusekδrper des Niederspannungs- Leistungsschalters angeordnete Lagerδffnung umfaßt.The invention relates to a movable contact arrangement for a low-voltage circuit breaker with contact levers and a contact lever carrier receiving the contact levers and with a stationary conductor piece which is connected to the contact levers by flexible conductors, the contact lever carrier being movable about a pivot bearing arranged in the region of the stationary conductor piece is, which comprises a bearing pin formed on the contact lever carrier and a stationary bearing opening arranged in a housing body of the low-voltage circuit breaker.
Eine Kontaktanordnung dieser Art ist im wesentlichen durch die DE 44 16 105 Cl bekanntgeworden. Die Figur 5 zeigt ergänzend eine Ansicht eines mit Kontakthebeln l bestückten Kontakthebelträgers 2 eines der genannten DE 44 16 105 Cl entsprechenden Leistungsschalters. Danach sind beide seitlichen Wangen 3 des Kontakthebelträgers 2 mit einem nach außen abragenden Lagerzapfen 4 versehen, der in eine Lageröffnung 5 eines abgebrochen angedeuteten Gehäusekδrpers 6 des Leistungsschalters eingreift. Diese Anordnung bedingt bei mehrpoliger Ausführung des Leistungsschalters einen entsprechenden Platzbedarf in der Breite. Die abgebrochen angedeuteten Trennwände 7 zwischen den benachbarten Polen müssen daher eine der axialen Tiefe beider Lagerδffnungen zuzüglich eines ausreichenden Zwischenraumes entsprechende Dicke aufweisen. Die beschriebene Bauform des Schwenklagers wirkt sich daher auf die Breite des Leistungsschalters aus.A contact arrangement of this type has essentially become known from DE 44 16 105 Cl. FIG. 5 additionally shows a view of a contact lever carrier 2 equipped with contact levers 1 of a circuit breaker corresponding to the aforementioned DE 44 16 105 Cl. Then both side cheeks 3 of the contact lever carrier 2 are provided with an outwardly projecting bearing pin 4 which engages in a bearing opening 5 of a broken-off indicated housing body 6 of the circuit breaker. In the case of a multi-pole version of the circuit breaker, this arrangement requires a corresponding amount of space. The broken-off partition walls 7 between the adjacent poles must therefore correspond to the axial depth of both bearing openings plus a sufficient space Have thickness. The described design of the pivot bearing therefore affects the width of the circuit breaker.
Für die schwenkbare Lagerung der bewegbaren Kontaktanordnung eines Niederspannungs-Leistungsschalters gibt es weitere bekannte Lösungen. Beispielsweise ist in der DE 38 02 183 AI eine Lösung dargestellt, bei welcher der Kontakthebelträger miteis eines Lagerbolzens an dem ortsfetsen Leiterstück schwenkbar angebracht ist. Hierbei übergreifen seitliche Wangen des Kontakthebelträgers das ortsfeste Leiterstück, wodurch gleichfalls wie bei der zuvor erläuterten bekannten Lδsung die Breite der bewegbaren Kontaktanordnung über das durch die elektrische Bemessung erforderliche Maß hinaus vergrößert wird. Es sind auch Schwenklager für bewegbare Kontaktanordnungen bekannt, die ohne oder mit nur sehr geringem seitlichem Überstand über das ortsfeste Leiterstück auskommen. Ein derartiges, als stromübertragende Gelenkanordnung ausgebildetes Schwenklager ist z. B. in der US 4 490 593 A beschrieben. Bei dieser Bauart dienen Wendel- federn als Gleitelement des Schwenklagers und gleichzeitig als Mittel zur Stromübertragung. Die Herstellung der Lagerδffnung erfordert einen verhältnismäßig großen Aufwand für die Bearbeitung des ortsfesten Leiterstückes. Auch sind stromübertragende Gelenkanordnungen mit Rücksicht auf ihren schwankenden elektrischen Ubergangswiderstand nicht für alle Einsatzgebiete von Niederspannungs-Leistungsschaltern geeigne .There are other known solutions for the pivotable mounting of the movable contact arrangement of a low-voltage circuit breaker. For example, a solution is shown in DE 38 02 183 AI, in which the contact lever carrier is pivotally attached to the stationary conductor piece by means of a bearing pin. In this case, lateral cheeks of the contact lever carrier overlap the stationary conductor piece, as a result of which, as in the known solution explained above, the width of the movable contact arrangement is increased beyond what is required by the electrical dimensioning. There are also pivot bearings for movable contact arrangements known, which manage without or with only a very small lateral protrusion over the stationary conductor piece. Such a pivot bearing designed as a current-transmitting joint arrangement is, for. B. described in US 4,490,593 A. In this design, coil springs serve as a sliding element of the swivel bearing and at the same time as a means for power transmission. The production of the bearing opening requires a relatively large outlay for the machining of the stationary conductor section. Also, with regard to their fluctuating electrical contact resistance, current-transmitting joint arrangements are not suitable for all areas of application of low-voltage circuit breakers.
Der Erfindung liegt die Aufgabe zugrunde, ausgehend von einer Kontaktanordnung der eingangs genannten Art ein robustes Schwenklager für den Kontakthebelträger zu schaffen, das keine Vergrößerung der Breite der Kontaktanordnung über das aus Gründen der elektrischen Bemessung erforderliche Maß hinaus erfordert .The invention has for its object to provide a robust pivot bearing for the contact lever carrier based on a contact arrangement of the type mentioned does not require an increase in the width of the contact arrangement beyond what is necessary for reasons of electrical dimensioning.
Gemäß der Erf indung wird diese Aufgabe daruch gelöst , daß der Kontakthebel träger nur einen etwa mittig angeordneten Lagerzapfen mit einer die Breite der bewegbaren Kontaktanordnung nicht übersteigende Länge aufweist und daß wenigstens eine Lageröffnung gleichfalls innerhalb des Breitenmaßes der bewegbaren Kontaktanordnung angeordnet ist .According to the invention, this object is achieved in that the contact lever carrier has only an approximately centrally arranged journal with a length not exceeding the width of the movable contact arrangement and that at least one bearing opening is also arranged within the width dimension of the movable contact arrangement.
Durch die Erfindung wird erreicht , daß keinerlei seitlicher Überstand des Schwenklagers über das ortsfeste Leiterstück zu berücksichtigen ist und demzufolge die Trennwände zwischen benachbarten Polen nur eine aus Gründen der elektrischen Isolation erforderliche Dicke aufzuweisen brauchen . Die Abmessungen des Leistungsschalters werden hierdurch in vorteilhafter Weise verringert . Dieser Vorteil geht j edoch nicht zu Lasten der mechanischen Zuverlässigkeit des Schwenklagers . Vielmehr steht nun eine erhebliche größere Stützweite für den Lagerzapfen zur Verfügung, was sich günstig auf die Lebensdauer und die Zuverlässigkeit des Leistungsschalters auswirkt .It is achieved by the invention that no lateral protrusion of the pivot bearing over the stationary conductor piece has to be taken into account and consequently the partitions between adjacent poles need only have a thickness required for reasons of electrical insulation. The dimensions of the circuit breaker are hereby advantageously reduced. However, this advantage is not at the expense of the mechanical reliability of the pivot bearing. Rather, there is now a considerably larger span for the bearing journal, which has a favorable effect on the service life and reliability of the circuit breaker.
Der Schwenkwinkel des Kontakthebelträgers beim Ein- und Ausschalten des Leistungsschalters ist verhältnismäßig gering . Deshalb ist es an sich möglich, den gesamten Endbereich des Kontakthebel trägers als Lagerzapfen auszubilden . Im Rahmen der Erfindung kann j edoch ein den Lagerzapfen tragender Hauptarm des Kontakthebelträgers in Richtung des Lagerzapfens derart verjüngt ausgebildet sein, der Lagerzapfen in zwei seitliche Zapfenbereiche unterteilt ist und daß jedem Zapfenbereich eine Lagerδf fnung zugeordnet ist . Auf diese Weise wird die größtmögliche Stützweite erzielt und damit bei verhältnismäßig geringem Aufwand eine toleranzarme Lagerung ermöglicht .The pivoting angle of the contact lever carrier when the circuit breaker is switched on and off is relatively small. Therefore, it is possible in itself to design the entire end region of the contact lever carrier as a journal. Within the scope of the invention, however, a main arm of the contact lever carrier, which carries the bearing journal, can be tapered in the direction of the bearing journal, the bearing journal is divided into two lateral journal areas and that each journal area is assigned a bearing opening. In this way, the largest possible span is achieved and thus enables a tolerance-free storage with relatively little effort.
Abweichend von der üblichen Paarung eines zylindrischen Lagerzapfens mit einer zylindrischen Lagerδf fnung kann es für die Zwecke der Erf indung günstiger sein, wenn die Lager- Öffnung bzw . die Lagerδff nungen eine polygonale Querschnittsform aufweist bzw . aufweisen . In Betracht kommt z . B . eine quadratische , hexagonale oder oktogonale Querschnittsform. Diese Formen sind im Rahmen der zur Herstellung von Gehäuse- kδrpern aus Kunststoff gebräuchlichen Verfahren unter ü - ständen günstiger als zylindrische Lagerδf f nungen herstellbar und gestatten ferner die Unterbringung einer Vorratsmenge an Schmierstof f , die für die gesamte vorgesehene Lebensdauer des Leistungsschalters ausreichend ist .In deviation from the usual pairing of a cylindrical bearing journal with a cylindrical bearing opening, it may be more favorable for the purposes of the invention if the bearing opening or. the bearing openings have a polygonal cross-sectional shape or. exhibit . For example, B. a square, hexagonal or octagonal cross-sectional shape. These forms can be produced more cheaply than cylindrical bearing openings in the course of the processes customary for the production of plastic housing bodies and furthermore allow a quantity of lubricant to be accommodated which is sufficient for the entire intended service life of the circuit breaker.
In bekannter Weise kann die Lagerδffnung bzw . können die Lagerδff nungen durch zusammenwirkende Ausnehmungen bzw . Flächen von zwei trennbaren Baugruppen des Niederspannungs- Leistungsschalters gebildet sein . Die vollständigen Lager- δf fnungen entstehen auf diese Weise erst beim Zusammenbau der Gehäusekδrper, was die Montage des Kontakthebelträgers erleichtert . Dabei kann die eine Baugruppe durch den erwähnten Geäusekδrper des Leiεtungsschalters und die weitere Baugruppe durch das die Ausnehmung wenigstens örtlich überdeckende ortsfeste Leiterstück gebildet sein. Die Erfindung wir im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.In a known manner, the bearing opening or. can the bearing openings by interacting recesses or. Surfaces are formed by two separable assemblies of the low-voltage circuit breaker. In this way, the complete bearing openings only arise when the housing body is assembled, which facilitates the assembly of the contact lever carrier. The one assembly can be formed by the housing body of the circuit breaker mentioned and the further assembly can be formed by the stationary conductor piece that at least locally covers the recess. The invention is explained below with reference to the embodiment shown in the figures.
Die Figur l zeigt eine bewegbare Kontaktanordnung in einer teilweise geschnittenen Seitenansicht .FIG. 1 shows a movable contact arrangement in a partially sectioned side view.
Die Figur 2 zeigt die Kontaktanordnung gemäß der Figur 1 mit Blick auf die kontaktgebende Seite von Kontakthebeln.FIG. 2 shows the contact arrangement according to FIG. 1 with a view of the contacting side of contact levers.
Die Figuren 3 und 4 zeigen Einzelheiten von Lagerδffnungen.Figures 3 and 4 show details of bearing openings.
In der Figur 5 ist eine bewegbare Kontaktanordnung gezeigt, wie sie bei einem Leistungsschalter nach der DE 44 16 105 verwendet wird, und zwar in einer der Figur 2 entsprechenden Darstellung.FIG. 5 shows a movable contact arrangement as used in a circuit breaker according to DE 44 16 105, in a representation corresponding to FIG. 2.
Die in der Figur 1 in einer Seitenansicht gezeigte bewegbare Kontaktanordnung 10 gehört zu einem nur als Umriß angedeuteten Niederspannungs-Leistungsschalter 11. Die Kontakt- anordnung 11 umfaßt einen Kontakthebelträgere 12, der einstückig oder mehrteilig ausgebildet und der ganz oder teilweise aus isolierendem Kunststoff hergestellt sein kann. An dem Kontakthebelträger 12 sind vorzugsweise mehrere parallele Kontakthebel 13 mittels eines Lagerbolzens 14 schwenkbar angebracht. Kontaktkraftfedern 15 spannen dieThe movable contact arrangement 10 shown in a side view in FIG. 1 belongs to a low-voltage circuit breaker 11, which is only indicated as an outline. The contact arrangement 11 comprises a contact lever carrier 12, which is formed in one piece or in several parts and which can be made entirely or partially of insulating plastic . A plurality of parallel contact levers 13 are preferably pivotably attached to the contact lever carrier 12 by means of a bearing pin 14. Contact force springs 15 tension the
Kontakthebel 13 in Richtung eines ortsfesten Schaltkontaktes vor, der in der Figur l zur Vereinfachung der Darstellung fortgelassen ist. Insoweit wird auf auf die eingangs erwähnte DE 44 16 105 Cl verwiesen, in der eine vollständige Strombahn eines Niederspannungs-Leistungsschalters einschließlich einer zugehörigen Lichtbogenlöschkammer dargestellt und beschrieben ist .Contact lever 13 in the direction of a fixed switching contact, which is omitted in Figure 1 to simplify the illustration. In this regard, reference is made to the aforementioned DE 44 16 105 Cl, in which a complete current path of a low-voltage circuit breaker including one associated arc quenching chamber is shown and described.
Die Kontakthebel 13 sind mittels eines biegsamen Leiterseiles 16 oder mehrerer solcher Leiterseile mit einem ortsfesten Leiterstück 17 verbunden, das insbesondere als untere Anschlußschiene ausgebildet sein kann, die aus einem Gehäuse des Leistungsschalters 11 herausragt. Zusammen mit einer etwa den Kontakthebeln 13 gegenüberstehenden oberen Anschluß- schiene (vgl. ebenfalls die genannte DE 44 16 105 Cl) bilden die Kontakthebel 13, die Leiterseile 16 und das untere ortsfeste Leiterstück 17 die Strombahn eines Poles des Leistungsschalters 11.The contact levers 13 are connected by means of a flexible conductor cable 16 or a plurality of such conductor cables to a stationary conductor piece 17, which can in particular be designed as a lower connecting rail which protrudes from a housing of the circuit breaker 11. Together with an upper connecting rail approximately opposite the contact levers 13 (cf. likewise the aforementioned DE 44 16 105 Cl), the contact levers 13, the conductor cables 16 and the lower stationary conductor piece 17 form the current path of a pole of the circuit breaker 11.
Zum Ein- und Ausschalten führt der Kontakthebelträger 12 eine durch einen Doppelpfeil 20 angedeutete Schwenkbewegung aus, die durch eine schematisch angedeutete Antriebsvorrichtung 21 veranlaßt wird. Hierzu ist die Antriebsvorrichtung 21 mit dem Kontakthebeltr ger 12 an seiner den Kontakthebeln 13 gegen- überliegenden Rückseite durch ein gelenkiges Koppelgestänge 22 verbunden. Ein insgesamt mit 23 bezeichnetes Schwenklager für den Kontakthebelträger 12 befindet sich nahe dem ortsfesten Leiterstück 17 und umfaßt einen am unteren Ende eines Hauptarmes 24 des Kontakthebelträgers 12 angeordneten zylindrischen Lagerzapfen 25 sowie wenigstens eine Lagerδffnung 26.For switching on and off, the contact lever carrier 12 executes a pivoting movement indicated by a double arrow 20, which is caused by a schematically indicated drive device 21. For this purpose, the drive device 21 is connected to the contact lever carrier 12 on its rear side opposite the contact levers 13 by an articulated coupling linkage 22. A pivot bearing, designated as a whole, for the contact lever carrier 12 is located near the stationary conductor piece 17 and comprises a cylindrical bearing pin 25 arranged at the lower end of a main arm 24 of the contact lever carrier 12 and at least one bearing opening 26.
Wie bereits erwähnt, kann der Lagerzapfen die gesamte zur Verfügung stehende Breite der Kontaktanordnung 10 einnehmen, die im wesentlichen der Breite des ortsfesten Leiterstückes 17 entspricht. Wie jedoch näher die Figur 2 zeigt, kann der Hauptarm 24 des Kontakthebelträgers 12 in Richtung auf denAs already mentioned, the bearing journal can take up the entire available width of the contact arrangement 10, which essentially corresponds to the width of the stationary conductor piece 17. However, as Figure 2 shows in more detail, the Main arm 24 of the contact lever carrier 12 in the direction of the
Lagerzapfen 25 entsprechend der gestrichelten Darstellung verjüngt ausgebildet sein. Hierdurch werden zwei seitlicheBearing pin 25 may be tapered in accordance with the dashed illustration. This will make two side
Zapfenbereiche 29 und 30 gebildet, denen jeweils eine eigene Lagerδffung 31 bzw. 32 zugeordnet ist.Pin regions 29 and 30 are formed, each of which is assigned its own bearing opening 31 and 32, respectively.
Unabhängig davon, ob eine durchgehende Lagerδffnung oder zwei getrennte Lageröffnungen vorgesehen sind, können diese Lageröffnungen unterschiedlich in den Aufbau des Leistungs- Schalters 11 einbezogen sein. In dem Beispiel nach der Figur 1 ist die Lagerδffnung 26 praktisch vollständig in einem Gehäusekδrper 27 untergebracht und ist durch eine Ausnehmung 28 von rechtwinkliger Querschnittsform in Verbindung mit dem Leiterstück 17 gebildet. Die Tiefe der Ausnehmung 28 entspricht dabei wenigstens dem Durchmesser des Lagerzapfens 24. Das Leiterstück 17 überdeckt die Ausnehmung 28 nur örtlich und nur soweit, daß der Lagerzapfen 25 am Verlassen der Lagerδffnung 26 gehindert wird. Diese Anordnung hat den Vorteil, daß beim Lösen des Leiterstückes 17 zugleich der Kontakthebelträger 12 freigegeben und daher die Montage und Demontage bei der Fertigung und der Wartung erleichtert wird.Regardless of whether a continuous bearing opening or two separate bearing openings are provided, these bearing openings can be included differently in the structure of the circuit breaker 11. In the example according to FIG. 1, the bearing opening 26 is practically completely accommodated in a housing body 27 and is formed by a recess 28 of rectangular cross-sectional shape in connection with the conductor piece 17. The depth of the recess 28 corresponds at least to the diameter of the bearing pin 24. The conductor piece 17 covers the recess 28 only locally and only to the extent that the bearing pin 25 is prevented from leaving the bearing opening 26. This arrangement has the advantage that when the conductor piece 17 is loosened, the contact lever carrier 12 is released at the same time, and assembly and disassembly during manufacture and maintenance is therefore facilitated.
Während die in der Figur 1 gezeigte Lagerδffnung 26 eine etwa quadratische Querschnittsform aufweist, können auch andere polygonale Querschnittsformen vorteilhaft sein. Als Beispiel zeigt die Figur 3 eine Lagerδffnung 33 mit hexagonaler Querschnittsform, die durch symmetrische Ausnehmungen in zwei zusammengefügten Gehäusekδrpern 34 und 35 gebildet ist. Sinngemäß ist eine Lagerδffnung 36 mit oktogonaler Gestalt gemäß der Figur 4 verwendbar. In dem Ausführunsgbeispiel gemäß der Figur 1 befindet sich das Schwenklager 23 nahe dem inneren Ende des Leiterstückes 17 und unterhalb desselben. Offensichtlich sind auch andere Anordnungen im Bereich des Leiterstückes 17 möglich, z.B. in der Verlängerung des Leiterstückes 17 oder direkt oberhalb desselben. In diesen Fällen ist das Leiterstück 17 nicht als Abdeckung bzw. Begrenzung der betreffenden Lagerδffnung benutzbar. Es empfiehlt sich dann, eine Anordnung entsprechend den Figuren 3 und 4 zu verwenden, bei der die Lageröffnungen durch zwei Gehäusekδrper begrenzt werden. While the bearing opening 26 shown in FIG. 1 has an approximately square cross-sectional shape, other polygonal cross-sectional shapes can also be advantageous. As an example, FIG. 3 shows a bearing opening 33 with a hexagonal cross-sectional shape, which is formed by symmetrical recesses in two joined housing bodies 34 and 35. A bearing opening 36 with an octagonal shape according to FIG. 4 can be used analogously. In the exemplary embodiment according to FIG. 1, the pivot bearing 23 is located near the inner end of the conductor piece 17 and below it. Obviously, other arrangements in the area of the conductor piece 17 are also possible, for example in the extension of the conductor piece 17 or directly above the same. In these cases, the conductor piece 17 cannot be used as a cover or delimitation of the relevant bearing opening. It is then advisable to use an arrangement corresponding to FIGS. 3 and 4, in which the bearing openings are delimited by two housing bodies.

Claims

Patentansprüche claims
1. Bewegbare Kontaktanordnung (10) für einen Niederspannungs- Leistungschalter (11) mit Kontakthebeln (13) und einem die Kontakthebel (13) aufnehmenden Kontakthebelträger (12) sowie mit einem ortsfesten Leiterstück (17) , das mit den Kontakthebeln (13) durch biegsame Leiter (16) verbunden ist, wobei der Kontakthebelträger (12) um ein im Bereich des ortsfesten Leiterstückes (17) angeordnetes Schwenklager (23) bewegbar ist, das einen an dem Kontakthebelträger (12) angeformten Lagerzapfen (25) und eine ortsfeste, in einem Gehäusekδrper (27, 34, 35) des Niederspannungs- Leistungsschalters (11) angeordnete Lagerδffnung (26, 33, 34) umfaßt, d a d u r c h g e k e n n z e i c h n e t , daß das der Kontakthebelträger (12) nur einen etwa mittig angeordneten Lagerzapfen (25) mit einer die Breite der bewegbaren Kontaktanordnung (10) nicht übersteigenden Länge aufweist und daß wenigstens eine Lageröffnung (26, 33, 34) gleichfalls innerhalb des Breitenmaßes der bewegbaren Kontaktanordnung (10) angeordnet ist.1. Movable contact arrangement (10) for a low-voltage circuit breaker (11) with contact levers (13) and a contact lever carrier (12) receiving the contact lever carrier (12) and with a fixed conductor piece (17) with the contact levers (13) by flexible Conductor (16) is connected, the contact lever carrier (12) being movable about a pivot bearing (23) which is arranged in the region of the stationary conductor piece (17) and which has a bearing pin (25) molded onto the contact lever carrier (12) and a stationary, in one Housing body (27, 34, 35) of the low-voltage circuit breaker (11) arranged bearing opening (26, 33, 34), characterized in that the contact lever carrier (12) only an approximately centrally arranged bearing pin (25) with a the width of the movable Contact arrangement (10) does not exceed the length and that at least one bearing opening (26, 33, 34) also within the width dimension of the movable Kontaktano rdnung (10) is arranged.
2. Bewegbare Kontakt anordnung 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 ein den Lagerzapfen (25) tragender Hauptarm (24) des2. Movable contact arrangement according to claim 1, d a d u r c h g e k e n n z e i c h n e t that a the bearing journal (25) supporting main arm (24) of the
Kontakthebelträgers (12) in Richtung des Lagerzapfens (25) derart verjüngt ausgebildet ist, daß der Lagerzapfen (23) in zwei seitliche Zapfenbereiche (29, 30) unterteilt ist und daß jedem Zapfenbereich (29, 30) eine Lagerδffnung (31, 32, 33, 34) zugeordnet ist. Contact lever carrier (12) is tapered in the direction of the bearing pin (25) such that the bearing pin (23) is divided into two lateral pin areas (29, 30) and that each pin area (29, 30) has a bearing opening (31, 32, 33 , 34) is assigned.
3. Bewegbare Kontaktanordnung nach Anspruch 2 , d a d u r c h g e k e n n z e i c h n e t , daß die Lagerδffnung bzw. die Lagerδffnungen (26, 33, 34) eine polygonale Querschnittsform aufweist .3. Movable contact arrangement according to claim 2, so that the bearing opening or the bearing openings (26, 33, 34) has a polygonal cross-sectional shape.
4. Bewegbare Kontaktanordnung nach Anspruch 3 , d a d u r c h g e k e n n z e i c h n e t , daß die Lagerδffnung bzw. Lagerδffnungen (26, 33, 34) durch zusammenwirkende Ausnehmungen bzw. Flächen von zwei trennbaren Baugruppen des Niederspannungs-Leistungsschalters (11) gebildet sind.4. Movable contact arrangement according to claim 3, so that the bearing opening or bearing openings (26, 33, 34) are formed by interacting recesses or surfaces of two separable assemblies of the low-voltage circuit breaker (11).
5. Bewegbare Kontakanordnung nach Anspruch 4 , d a d u r c h g e k e n n z e i c h n e t , daß die eine Baugruppe durch den Gehäusekörper (27) und die weitere Baugruppe durch das die Ausnehmung (26) wenigstens örtlich überdeckende ortsfeste Leiterstück (17) gebildet ist. 5. Movable contact arrangement according to claim 4, so that the one assembly is formed by the housing body (27) and the further assembly is formed by the at least locally overlapping stationary conductor piece (17) by the housing body (27).
EP97941834A 1996-08-21 1997-08-21 Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing Expired - Lifetime EP0920703B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19635366 1996-08-21
DE19635366A DE19635366A1 (en) 1996-08-21 1996-08-21 Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing
PCT/DE1997/001868 WO1998008240A1 (en) 1996-08-21 1997-08-21 Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing

Publications (2)

Publication Number Publication Date
EP0920703A1 true EP0920703A1 (en) 1999-06-09
EP0920703B1 EP0920703B1 (en) 2000-02-16

Family

ID=7804275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97941834A Expired - Lifetime EP0920703B1 (en) 1996-08-21 1997-08-21 Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing

Country Status (5)

Country Link
US (1) US6188031B1 (en)
EP (1) EP0920703B1 (en)
JP (1) JP2001503557A (en)
DE (2) DE19635366A1 (en)
WO (1) WO1998008240A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727696B4 (en) * 1997-06-20 2007-09-13 Siemens Ag Movable switch contact for low-voltage circuit breaker
DE19932010C1 (en) * 1999-07-02 2001-03-08 Siemens Ag Switch contact arrangement of a low-voltage circuit breaker with main contacts, intermediate contacts and break contacts
DE10243835B3 (en) * 2002-09-13 2004-04-15 Siemens Ag Switch contact arrangement with an erosion indicator for the switch contacts
US7351927B1 (en) * 2006-10-13 2008-04-01 Eaton Corporation Electrical switch, conductor assembly, and independent flexible conductive elements therefor
US8008587B2 (en) * 2009-04-08 2011-08-30 Eaton Corporation Circuit breaker carrier assembly with spring guide

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1638114C3 (en) * 1967-01-30 1979-09-13 S.A.C.E.-S.P.A. Costruzione Elettromeccaniche, Bergamo (Italien) Current limit switch
US4490593A (en) * 1983-05-09 1984-12-25 Square D Company Arrangement for arc transfer in high amperage molded case circuit breaker
DE3802183A1 (en) 1988-01-26 1989-08-03 Licentia Gmbh LOW VOLTAGE CIRCUIT BREAKERS WITH INTERCHANGEABLE CONTACTS
US4926019A (en) * 1988-09-08 1990-05-15 Siemens Energy & Automation, Inc. Moving copper pivot
JP2864727B2 (en) * 1990-11-22 1999-03-08 富士電機株式会社 Contact device for repulsive circuit breaker
FR2688625B1 (en) * 1992-03-13 1997-05-09 Merlin Gerin CONTACT OF A MOLDED BOX CIRCUIT BREAKER
DE4416105C1 (en) * 1994-04-19 1995-05-24 Siemens Ag LV power switch
DE29503327U1 (en) * 1995-02-16 1995-04-13 Siemens Ag Contact lever assembly for a low voltage circuit breaker
DE19643607A1 (en) * 1996-05-13 1997-11-20 Siemens Ag LV power switch with contact system and connection rails

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9808240A1 *

Also Published As

Publication number Publication date
WO1998008240A1 (en) 1998-02-26
DE59701142D1 (en) 2000-03-23
JP2001503557A (en) 2001-03-13
DE19635366A1 (en) 1998-02-26
EP0920703B1 (en) 2000-02-16
US6188031B1 (en) 2001-02-13

Similar Documents

Publication Publication Date Title
DE69931122T2 (en) TURNING CONTACT ARRANGEMENT FOR HIGH-CURRENT SWITCHES
EP1037239B1 (en) Multi-pole circuit breaker
WO2009103524A1 (en) Battery module comprising an integrated electrical component
EP0920703B1 (en) Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing
DE19739702C1 (en) LV circuit breaker with switch-shaft
EP0756751A1 (en) Bearing arrangement for a switch shaft
EP1218898B1 (en) Low-voltage power circuit breaker comprising a switching chamber and a displaceable contact unit
CH658946A5 (en) HIGH VOLTAGE SYSTEM.
DE4129295C1 (en)
EP1374264B1 (en) Switching contact arrangement for a power switch
DE102012201939A1 (en) Switching unit for an electrical switching device
DE19930813A1 (en) Circuit breakers with connecting rails for different nominal currents
DE10260371B4 (en) Low-voltage circuit breakers
WO2018197196A1 (en) Vacuum switch
DE102017202857A1 (en) Switch arrangement with two circuit breakers and a circuit breaker
DE102017203039A1 (en) Shift rod for a circuit breaker
DE3732004A1 (en) HIGH VOLTAGE DISCONNECTOR
DE3224743C2 (en)
DE60006838T2 (en) ELECTRICAL CONNECTION DEVICE FOR CIRCUIT BREAKER
DE3045206A1 (en) Isolating switch in switching cabinets - has contact spheres retained by resilient element between sliding contact and flange on contact sleeve
WO1997033290A2 (en) Power switch with insulating contact lever carrier
DE693180C (en) Roller switch
EP0288417B1 (en) High-voltage power circuit breaker
WO1997044799A1 (en) Low-voltage circuit breaker with a contact carrier
DE3111789A1 (en) VACUUM SWITCHING DEVICE WITH LIMITED SWIVEL FASTENING OF THE SWITCH TUBES

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990205

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19990705

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20000216

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000216

REF Corresponds to:

Ref document number: 59701142

Country of ref document: DE

Date of ref document: 20000323

EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011022

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030301