EP0026416B1 - Switch mechanism for circuit breaker - Google Patents

Switch mechanism for circuit breaker Download PDF

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Publication number
EP0026416B1
EP0026416B1 EP80105660A EP80105660A EP0026416B1 EP 0026416 B1 EP0026416 B1 EP 0026416B1 EP 80105660 A EP80105660 A EP 80105660A EP 80105660 A EP80105660 A EP 80105660A EP 0026416 B1 EP0026416 B1 EP 0026416B1
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EP
European Patent Office
Prior art keywords
lever
contact
release
arm
ratchet
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.)
Expired
Application number
EP80105660A
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German (de)
French (fr)
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EP0026416A1 (en
EP0026416B2 (en
Inventor
Günter Ing. grad Böker
Georg Ing. Grad Schedler
Dieter Kropp
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Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to AT80105660T priority Critical patent/ATE3091T1/en
Publication of EP0026416A1 publication Critical patent/EP0026416A1/en
Publication of EP0026416B1 publication Critical patent/EP0026416B1/en
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Publication of EP0026416B2 publication Critical patent/EP0026416B2/en
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Classifications

    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H01H71/1027—Interconnected mechanisms comprising a bidirectional connecting member actuated by the opening movement of one pole to trip a neighbour pole
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a switching mechanism for circuit breakers, in which an operating knob acts on a spring-loaded contact lever via a latch lever.
  • a switching mechanism is described in DE-A1-2651 158.
  • This mechanism which has only relatively few components, is disadvantageous, however, because only an indirect impact anchor effect is possible via a switching arm pawl system and the opening movement by a forced guidance of the switching arm. Jack system is hindered.
  • a switching mechanism is known from DE-A1-2336222, in which a spring-mounted contact lever interacts with a manual control knob via several hinged tabs.
  • One of these tabs holds a pin that is longitudinally guided in a slot, which in turn can be hooked behind a rotatably mounted pawl and thereby latches the entire mechanism.
  • the double-armed contact lever is guided with a slot on a fixed axis and can be swiveled around it.
  • a spring engages the contact lever, which in the switched-on position tensions the entire mechanism and generates the contact pressure.
  • This switching mechanism is disadvantageous in that a complex latching mechanism with several joints is required to achieve low release forces.
  • the invention has for its object to improve the switching mechanism mentioned at the outset so that it requires the least possible unlatching forces with the least amount of components and achieves short switch-off times. It should also be designed so that a particularly small size is possible. According to the invention this is achieved in that the freely floating arranged in the contact closing direction under the action of a contact spring, in the closed position on the ratchet lever and on the fixed contact piece, the contact lever loosely interacts with a fixed axis in that the point of contact of the contact spring on the contact lever between this axis and the latching point lies and a separately pivoted trigger lever acts on the one hand on the latch lever and on the other hand can be influenced by the contact lever.
  • 1-4 consists of a contact lever 1, which forms at one end a contact piece 2, which cooperates with a stationary contact piece 3. At the other end, the contact lever is provided with a latching pin 4 which interacts with a latch lever 5.
  • the free end 5a of the latch lever 5 articulated on a manual control knob 6 is supported on the latching pin 4 of the contact lever 1 in the switched-on position of the switching mechanism.
  • An angled extension 5b engages around the latching pin and can be influenced by a lever arm 7b of a release lever 7.
  • the release lever which can be pivoted about a stationary axis 8, has a further lever arm 7a, on which the latching pin 4 can act.
  • the contact lever 1 has a notch 13 in the middle between the contact piece 2 and the latching pin 4, which is located in the region of a fixed axis 14.
  • a contact spring 16 supported on the housing 15 of the switch acts on the contact lever. The point of contact of the contact spring 16 on the contact lever lies between the latching pin 4 and the notch 13.
  • the contact force is determined by the ratio of the lever arms which are formed by the point of application of the contact spring to the latching pin and by the contact contact point to the latching pin.
  • the distance between the axis 14 and the bottom of the notch 13 is a measure of the burn-up reserve of the switch.
  • the pawl lever 5 is clamped with the control knob 6, which can be pivoted about a fixed axis 6a, so that the contact lever is held in the switch-on position by the end 5a of the pawl lever 5 which is supported on the latching pin 4.
  • the short-circuit or overcurrent switch-off is effected by the plunger 11 of the magnetic release device or by the bimetal strip 10.
  • the plunger 11 and the bimetal strip 10 act in the direction of the arrows 11a and 10a on the slide 9 and move it in the direction of the arrow 9a, so that it strikes the lever arm 7c of the release lever 7 with an edge 9b and rotates it counterclockwise about the axis 8.
  • the lever arm 7b strikes the angled extension 5b of the ratchet lever 5 and lifts it so far that the end 5a of the latching pin 4 of the Contact lever 1 releases.
  • the trigger lever reaches the position shown in Fig. 2.
  • the contact lever 1 When the latching pin 4 is released, the contact lever 1 first rotates under the action of the contact spring 16 about its contact point until the base of the notch 13 comes into contact with the axis 14, which now becomes the pivot axis when the contact lever moves further.
  • the latching pin 4 strikes against the lever arm 7a and thereby accelerates the rotary movement of the release lever.
  • the control knob 6 also goes into the switch-off position shown in FIG. 3 together with the latch lever 5.
  • the control knob 6 is under the action of a spring, not shown, which drives it into the position shown in FIG. 3.
  • a spring, also not shown, acting on the pawl lever 5 presses it with the angled extension 5b against the edge 7'b of the lever arm 7b. As a result, the end 5a of the pawl lever 5 again engages over the latching pin 4.
  • the mechanism is switched on in such a way that the manual control knob 6 is pivoted counterclockwise, as a result of which the pawl lever 5 acts on the contact lever 1 and in turn pivots it about the axis 14.
  • the contact lever 1 pivots about the axis 14 until it reaches the position shown in Fig. 4, i. H. touches the fixed contact piece 3 with its movable contact piece 2.
  • the contact spring 16 is tensioned.
  • the contact lever lifts off the axis 14 when the hand control toggle is pivoted further counterclockwise and then rotates around the contact contact point during this movement.
  • the final switch-on position is reached when the manual control knob 6, together with the ratchet lever 5, reaches the dead center position.
  • a contact lever 21 with an elongated hole 21c is mounted on a fixed axis 14.
  • the contact lever is fork-shaped at one end by means of a long prong 21 b and a short prong 21 a and is latched to the latter by a ratchet lever 25 designed as a wire bracket.
  • a lever arm 27a of a release lever 27 pivotable about a fixed axis 8 acts on this latched end of the wire bracket.
  • a second lever arm 27b of the release lever lies in the effective area of a plunger 11 of a magnetic release member 12.
  • the contact lever 21 in turn has an angled portion 21d which acts on the rear side of the lever arm 27a during the opening movement.
  • a stop 21f of the contact lever located in the region of the end of the lever arm 27b is also detected by the plunger 11 of the triggering element during the short-circuit shutdown, so that an impact is exerted on the contact lever. Otherwise, the sequences of movements are similar to the arrangement according to FIGS. 1-4.
  • the mechanism according to the invention is particularly advantageous in that, apart from the small number of its components and its small space requirement, because of the separation of the movable contact lever, it allows a connection to the thermal release element with variable bimetallic elements. In addition, because of the latching at one end of the contact lever, the unlatching forces are reduced to a minimum.
  • the possibility of coupling with neighboring switches is also advantageous, so that multipole switches can be created in a simple manner.
  • the release lever has jaws 17 reaching up to the switch walls, the end faces of which have receiving holes 17a for coupling pins or recesses 17b.
  • the coupling pin of a switch engages through openings in the housing in the recess of the adjacent trigger lever jaw and thus produces the coupling.

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  • Breakers (AREA)

Abstract

1. Switching mechanism for a protective circuit breaker, in which a control toggle (6) by means of a ratchet lever (5; 25) acts on a resilient contact lever (1; 21), characterised in that the contact lever (1; 21) co-operates movably with a fixed shaft (14), the contact lever being freely suspended, being biased in the contact closure direction under the effect of a contact spring (16), and supporting itself in the closure position on the ratchet lever (5; 25) and on the fixed contact piece 3, that the point of engagement of the contact spring (16) on the contact lever (1; 21) lies between said shaft (14) and the latching point (4, 5), and a separate pivotally-mounted release lever (7; 27) on the one hand acts on the ratchet lever (5, 25) and on the other hand is controllable by the contact lever (1; 21).

Description

Die Erfindung betrifft einen Schaltmechanismus für Leitungsschutzschalter, bei dem ein Bedienungsknebel über einen Klinkenhebel auf einen gefederten Kontakthebel wirkt. Ein derartiger Schaltmechanismus ist in der DE-A1-2651 158 beschrieben. Dieser zwar nur verhältnismäßig wenig Bauteile aufweisende Mechanismus ist aber nachteilig, weil nur eine indirekte Schlagankerwirkung über ein Schaltarm-Klinkensystem möglich ist und die Öffnungsbewegung durch eine Zwangsführung des Schaltarm- . Klinkensystems behindert wird.The invention relates to a switching mechanism for circuit breakers, in which an operating knob acts on a spring-loaded contact lever via a latch lever. Such a switching mechanism is described in DE-A1-2651 158. This mechanism, which has only relatively few components, is disadvantageous, however, because only an indirect impact anchor effect is possible via a switching arm pawl system and the opening movement by a forced guidance of the switching arm. Jack system is hindered.

Weiterhin ist aus der DE-A1-2336222 ein Schaltmechanismus bekannt, bei dem ein gefedert angeordneter Kontakthebel über mehrere gelenkig miteinander verbundene Laschen mit einem Handbedienungsknebel zusammenwirkt. In einer dieser Laschen ist ein in einem Schlitz längsgeführter Stift gehalten, der seinerseits hinter einer drehbar gelagerten Klinke verhakbar ist und dadurch den gesamten Mechanismus verklinkt. Der doppelarmige Kontakthebel ist mit einem Schlitz auf einer ortsfesten Achse querverschieblich geführt und um diese schwenkbar. Auf der der Kontaktstelle abgekehrten Seite greift am Kontakthebel eine Feder an, die in der Einschaltstellung den gesamten Mechanismus verspannt und den Kontaktdruck erzeugt. Dieser Schaltmechanismus ist insofern nachteilig, als zum Erreichen geringer Entklinkungskräfte ein aufwendiger Verklinkungsmechanismus mit mehreren Gelenken erforderlich ist.Furthermore, a switching mechanism is known from DE-A1-2336222, in which a spring-mounted contact lever interacts with a manual control knob via several hinged tabs. One of these tabs holds a pin that is longitudinally guided in a slot, which in turn can be hooked behind a rotatably mounted pawl and thereby latches the entire mechanism. The double-armed contact lever is guided with a slot on a fixed axis and can be swiveled around it. On the side facing away from the contact point, a spring engages the contact lever, which in the switched-on position tensions the entire mechanism and generates the contact pressure. This switching mechanism is disadvantageous in that a complex latching mechanism with several joints is required to achieve low release forces.

Der Erfindung liegt die Aufgabe zugrunde, den eingangs erwähnten Schaltmechanismus so zu verbessern, daß er mit geringstem Aufwand an Bauteilen möglichst geringe Entklinkungskräfte benötigt und kurze Ausschaltzeiten erreicht. Er soll ferner so ausgestaltet sein, daß eine besonders kleine Bauweise möglich ist. Erfindungsgemäß wird das dadurch erreicht, daß der freischwebend angeordnete in Kontaktschließrichtung unter der Wirkung einer Kontaktfeder stehende, sich in Schließstellung am Klinkenhebel und am festen Kontaktstück abstützende Kontakthebel lose mit einer ortsfesten Achse zusammenwirkt, daß der Angriffspunkt der Kontaktfeder am Kontakthebel zwischen dieser Achse und der Verklinkungsstelle liegt und ein gesondert schwenkbar gelagerter Auslösehebel einerseits auf den Klinkenhebel einwirkt und andererseits vom Kontakthebel beeinflußbar ist.The invention has for its object to improve the switching mechanism mentioned at the outset so that it requires the least possible unlatching forces with the least amount of components and achieves short switch-off times. It should also be designed so that a particularly small size is possible. According to the invention this is achieved in that the freely floating arranged in the contact closing direction under the action of a contact spring, in the closed position on the ratchet lever and on the fixed contact piece, the contact lever loosely interacts with a fixed axis in that the point of contact of the contact spring on the contact lever between this axis and the latching point lies and a separately pivoted trigger lever acts on the one hand on the latch lever and on the other hand can be influenced by the contact lever.

Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Developments of the invention are specified in the subclaims.

Anhand der Zeichnung sei die Erfindung an einem Ausführungsbeispiel näher erläutert.

  • Fig. 1 zeigt den Schaltmechanismus in Einschaltstellung, während in
  • Fig. 2 die Freiauslösestellung wiedergegeben ist. In
  • Fig. 3 befindet sich der Mechanismus in Ausschaltstellung, während
  • Fig. 4 zur Erläuterung des Einschaltvorganges dient.
  • Fig. 5 zeigt eine Variation des Mechanismus nach Fig. 1 -4.
The invention is explained in more detail using an exemplary embodiment with reference to the drawing.
  • Fig. 1 shows the switching mechanism in the on position, while in
  • Fig. 2 shows the free release position. In
  • Fig. 3 is the mechanism in the off position while
  • Fig. 4 serves to explain the switch-on process.
  • Fig. 5 shows a variation of the mechanism of Fig. 1 -4.

Der Schaltmechanismus nach Fig. 1-4 besteht aus einem Kontakthebel 1, der an seinem einen Ende ein Kontaktstück 2 bildet, das mit einem orstfesten Kontaktstück 3 zusammenwirkt. Am anderen Ende ist der Kontakthebel mit einem Verklinkungszapfen 4 versehen, der mit einem Klinkenhebel 5 zusammenwirkt. Der an einem Handbedienungsknebel 6 angelenkte Klinkenhebel 5 stützt sich mit seinem freien Ende 5a in Einschaltstellung des Schaltmechanismus an dem Verklinkungszapfen 4 des Kontakthebels 1 ab. Eine abgewinkelte Verlängerung 5b umgreift den Verklinkungszapfen und ist von einem Hebelarm 7b eines Auslösehebels 7 beeinflußbar. Der um eine ortsfeste Achse 8 schwenkbare Auslösehebel hat einen weiteren Hebelarm 7a, auf den der Verklinkungszapfen 4 einwirken kann. An einem dritten Hebelarm 7c greifen über einen Auslöseschieber 9 ein Bimetallstreifen 10 und der Stößel 11 eines magnetischen Auslöseorgans 12 an. Der Kontakthebel 1 hat in der Mitte zwischen dem Kontaktstück 2 und dem Verklinkungszapfen 4 eine Einkerbung 13, die sich im Bereich einer ortsfesten Achse 14 befindet. Auf den Kontakthebel wirkt eine sich am Gehäuse 15 des Schalters abstützende Kontaktfeder 16 ein. Der Angriffspunkt der Kontaktfeder 16 am Kontakthebel liegt zwischen dem Verklinkungszapfen 4 und der Einkerbung 13.1-4 consists of a contact lever 1, which forms at one end a contact piece 2, which cooperates with a stationary contact piece 3. At the other end, the contact lever is provided with a latching pin 4 which interacts with a latch lever 5. The free end 5a of the latch lever 5 articulated on a manual control knob 6 is supported on the latching pin 4 of the contact lever 1 in the switched-on position of the switching mechanism. An angled extension 5b engages around the latching pin and can be influenced by a lever arm 7b of a release lever 7. The release lever, which can be pivoted about a stationary axis 8, has a further lever arm 7a, on which the latching pin 4 can act. A bimetallic strip 10 and the plunger 11 of a magnetic release element 12 engage on a third lever arm 7c via a release slide 9. The contact lever 1 has a notch 13 in the middle between the contact piece 2 and the latching pin 4, which is located in the region of a fixed axis 14. A contact spring 16 supported on the housing 15 of the switch acts on the contact lever. The point of contact of the contact spring 16 on the contact lever lies between the latching pin 4 and the notch 13.

In der in Fig. 1 dargestellten Einschaltstellung wird die Kontaktkraft durch das Verhältnis der Hebelarme bestimmt, die von dem Angriffspunkt der Kontaktfeder zum Verklinkungszapfen und von der Kontaktberührungsstelle zum Verklinkungszapfen gebildet sind. Der Abstand zwischen der Achse 14 und dem Grund der Einkerbung 13 ist ein Maß für die Abbrandreserve des Schalters. In der dargestellten Einschaltstellung ist der Klinkenhebel 5 mit dem um eine ortsfeste Achse 6a schwenkbaren Bedienungsknebel 6 über Totpunkt verspannt, so daß der Kontakthebel durch das sich am Verklinkungszapfen 4 abstützende Ende 5a des Klinkenhebels 5 in der Einschaltstellung gehalten wird.In the switch-on position shown in FIG. 1, the contact force is determined by the ratio of the lever arms which are formed by the point of application of the contact spring to the latching pin and by the contact contact point to the latching pin. The distance between the axis 14 and the bottom of the notch 13 is a measure of the burn-up reserve of the switch. In the switch-on position shown, the pawl lever 5 is clamped with the control knob 6, which can be pivoted about a fixed axis 6a, so that the contact lever is held in the switch-on position by the end 5a of the pawl lever 5 which is supported on the latching pin 4.

Die Kurzschluß- oder Überstromausschaltung erfolgt durch den Stößel 11 der magnetischen Auslöseeinrichtung bzw. durch den Bimetallstreifen 10. Der Stößel 11 und der Bimetallstreifen 10 wirken in Richtung der Pfeile 11 a bzw. 10a auf den Schieber 9 und bewegen diesen in Richtung des Pfeiles 9a, so daß er mit einer Kante 9b an den Hebelarm 7c des Auslösehebels 7 anschlägt und diesen im Gegenuhrzeigersinn um die Achse 8 dreht. Der Hebelarm 7b schlägt dabei auf die abgewinkelte Verlängerung 5b des Klinkenhebels 5 und hebt diese so weit an, daß das Ende 5a den Verklinkungszapfen 4 des Kontakthebels 1 freigibt. Der Auslösehebel gelangt dabei in die in Fig. 2 dargestellte Lage. Bei Freigabe des Verklinkungszapfens 4 dreht sich der Kontakthebel 1 unter der Wirkung der Kontaktfeder 16 zunächst um seine Kontaktstelle, bis der Grund der Einkerbung 13 an der Achse 14 zur Anlage kommt, die nunmehr bei der weiteren Bewegung des Kontakthebels zur Schwenkachse wird. Bevor der Auslösehebel 7 die in Fig.2 dargestellte Lage erreicht hat, schlägt der Verklinkungszapfen 4 gegen den Hebelarm 7a und beschleunigt dadurch die Drehbewegung des Auslösehebels. Während der Ausschaltbewegung des Kontakthebels 1 geht auch der Bedienungsknebel 6 zusammen mit dem Klinkenhebel 5 in die in Fig. 3 dargestellte Ausschaltstellung über. Der Bedienungsknebel 6 steht unter Wirkung einer nicht dargestellten Feder, die ihn in die Stellung nach Fig. 3 treibt. Eine ebenfalls nicht dargestellte an dem Klinkenhebel 5 angreifende Feder drückt diesen mit der abgewinkelten Verlängerung 5b gegen die Kante 7'b des Hebelarms 7b. Dadurch greift das Ende 5a des Klinkenhebels 5 wieder über den Verklinkungszapfen 4.The short-circuit or overcurrent switch-off is effected by the plunger 11 of the magnetic release device or by the bimetal strip 10. The plunger 11 and the bimetal strip 10 act in the direction of the arrows 11a and 10a on the slide 9 and move it in the direction of the arrow 9a, so that it strikes the lever arm 7c of the release lever 7 with an edge 9b and rotates it counterclockwise about the axis 8. The lever arm 7b strikes the angled extension 5b of the ratchet lever 5 and lifts it so far that the end 5a of the latching pin 4 of the Contact lever 1 releases. The trigger lever reaches the position shown in Fig. 2. When the latching pin 4 is released, the contact lever 1 first rotates under the action of the contact spring 16 about its contact point until the base of the notch 13 comes into contact with the axis 14, which now becomes the pivot axis when the contact lever moves further. Before the release lever 7 has reached the position shown in FIG. 2, the latching pin 4 strikes against the lever arm 7a and thereby accelerates the rotary movement of the release lever. During the switch-off movement of the contact lever 1, the control knob 6 also goes into the switch-off position shown in FIG. 3 together with the latch lever 5. The control knob 6 is under the action of a spring, not shown, which drives it into the position shown in FIG. 3. A spring, also not shown, acting on the pawl lever 5 presses it with the angled extension 5b against the edge 7'b of the lever arm 7b. As a result, the end 5a of the pawl lever 5 again engages over the latching pin 4.

Die Einschaltung des Mechanismus erfolgt in der Weise, daß der Handbedienungsknebel 6 im Gegenuhrzeigersinn geschwenkt wird, wodurch der Klinkenhebel 5 auf den Kontakthebel 1 wirkt und diesen seinerseits um die Achse 14 schwenkt. Der Kontakthebel 1 schwenkt so lange um die Achse 14, bis er die in Fig. 4 dargestellte Lage erreicht, d. h. mit seinem beweglichen Kontaktstück 2 das ortsfeste Kontaktstück 3 berührt. Bei dieser Einschaltbewegung wird die Kontaktfeder 16 gespannt. Der Kontakthebel hebt von der Achse 14 ab, wenn der Handbedienungsknebel weiter im Gegenuhrzeigersinn verschwenkt wird und dreht sich bei dieser Bewegung dann um die Kontaktberührungsstelle. Die endgültige Einschaltstellung ist erreicht, wenn der Handbedienungsknebel 6 zusammen mit dem Klinkenhebel 5 in Übertotpunktlage gelangt.The mechanism is switched on in such a way that the manual control knob 6 is pivoted counterclockwise, as a result of which the pawl lever 5 acts on the contact lever 1 and in turn pivots it about the axis 14. The contact lever 1 pivots about the axis 14 until it reaches the position shown in Fig. 4, i. H. touches the fixed contact piece 3 with its movable contact piece 2. During this switch-on movement, the contact spring 16 is tensioned. The contact lever lifts off the axis 14 when the hand control toggle is pivoted further counterclockwise and then rotates around the contact contact point during this movement. The final switch-on position is reached when the manual control knob 6, together with the ratchet lever 5, reaches the dead center position.

Bei der Ausführungsform nach Fig. ist ein Kontakthebel 21 mit einem Langloch 21c auf einer ortsfesten Achse 14 gelagert. Der Kontakthebel ist an seinem einen Ende mittels eines langen Zinkens 21 b und eines kurzen Zinkens 21 a gabelförmig ausgebildet und wird mit letzterem durch einen als Drahtbügel ausgebildeten Klinkenhebel 25 verklinkt. Auf dieses verklinkte Ende des Drahtbügels wirkt ein Hebelarm 27a eines um eine ortsfeste Achse 8 schwenkbaren Auslösehebels 27 ein. Ein zweiter Hebelarm 27b des Auslösehebels liegt im Wirkbereich eines Stößels 11 eines magnetischen Auslöseorgans 12. Der Kontakthebel 21 seinerseits hat eine Abwinklung 21 d, die bei der Ausschaltbewegung auf die Rückseite des Hebelarms 27a wirkt. Ein im Bereich des Endes des Hebelarmes 27b liegender Anschlag 21f des Kontakthebels wird bei der Kurzschlußabschaltung vom Stößel 11 des Auslöseorgans mit erfaßt, so daß auf den Kontakthebel eine Schlagwirkung ausgeübt wird. Im übrigen sind die Bewegungsabläufe ähnlich wie bei der Anordnung nach Fig. 1 -4.In the embodiment according to FIG. 1, a contact lever 21 with an elongated hole 21c is mounted on a fixed axis 14. The contact lever is fork-shaped at one end by means of a long prong 21 b and a short prong 21 a and is latched to the latter by a ratchet lever 25 designed as a wire bracket. A lever arm 27a of a release lever 27 pivotable about a fixed axis 8 acts on this latched end of the wire bracket. A second lever arm 27b of the release lever lies in the effective area of a plunger 11 of a magnetic release member 12. The contact lever 21 in turn has an angled portion 21d which acts on the rear side of the lever arm 27a during the opening movement. A stop 21f of the contact lever located in the region of the end of the lever arm 27b is also detected by the plunger 11 of the triggering element during the short-circuit shutdown, so that an impact is exerted on the contact lever. Otherwise, the sequences of movements are similar to the arrangement according to FIGS. 1-4.

Der erfindungsgemäße Mechanismus ist insofern besonders vorteilhaft, als er, abgesehen von der geringen Zahl seiner Bauteile und seines geringen Raumbedarfs, wegen der Trennung des beweglichen Kontakthebels eine Anbindung an das thermische Auslöseorgan mit variablen Bimetallen erlaubt. Außerdem wird wegen der Verklinkung an dem einen Ende des Kontakthebels eine Reduzierung der Entklinkungskräfte auf ein Minimum erreicht. Vorteilhaft ist auch die Kupplungsmöglichkeit mit Nachbarschaltern, so daß auf einfache Weise mehrpolige Schalter erstellt werden können. Der Auslösehebel besitzt bis an die Schalterwände heranreichende Backen 17, deren Stirnseiten Aufnahmelöcher 17a für Kupplungsstifte bzw. Ausnehmungen 17b haben. Der Kupplungsstift eines Schalters greift durch Gehäusedurchbrüche in die Ausnehmung der benachbarten Auslösehebelbacke und stellt somit die Kupplung her.The mechanism according to the invention is particularly advantageous in that, apart from the small number of its components and its small space requirement, because of the separation of the movable contact lever, it allows a connection to the thermal release element with variable bimetallic elements. In addition, because of the latching at one end of the contact lever, the unlatching forces are reduced to a minimum. The possibility of coupling with neighboring switches is also advantageous, so that multipole switches can be created in a simple manner. The release lever has jaws 17 reaching up to the switch walls, the end faces of which have receiving holes 17a for coupling pins or recesses 17b. The coupling pin of a switch engages through openings in the housing in the recess of the adjacent trigger lever jaw and thus produces the coupling.

Claims (6)

1. Switching mechanism for a protective circuit breaker, in which a control toggle (6) by means of a ratchet lever (5; 25) acts on a resilient contact lever (1; 21), characterised in that the contact lever (1; 21) co-operates movably with a fixed shaft (14), the contact lever being freely suspended, being biased in the contact closure direction under the effect of a contact spring (16), and supporting itself in the closure position on the ratchet lever (5; 25) and on the fixed contact piece 3, that the point of engagement of the contact spring (16) on the contact lever (1; 21) lies between said shaft (14) and the latching point (4, 5), and a separate pivotally-mounted release lever (7; 27) on the one hand acts on the ratchet lever (5, 25) and on the other hand is controllable by the contact lever (1 ; 21).
2. Switching mechanism according to claim 1, characterised in that the contact lever (1) has at its end a latching pin (4), which on the one hand serves to support the ratchet lever (5) and on the other hand is surrounded by an angular extension (5b) of the ratchet lever (5), and that its other end forms the movable contact piece (2), the fixed shaft (14) being located in the region of an indentation (13) of the contact lever provided approximately half-way between the movable contact piece (2) and the latching pin (4).
3. Switching mechanism according to claim 1 or 2, characterised in that the three-armed release lever (7), which is pivotable by the magnetic and thermal release member (12, 10) acts with one arm (7b) upon the angular extension (5b) of the ratchet lever (5), projects with the second arm (7a) into the field of traverse of the end of the contact lever (1) which carries the latching pin (4) and at the third arm (7c) engages the release members directly or via a slide bar (9).
4. Switching mechanism according to claim 3, characterised in that the release lever (7) comprises mountings for coupling elements at its third arm (7c).
5. Switching mechanism according to claim 3 or 4, characterised in that the release lever (7), which preferably consists of plastics material, comprises at its third arm (7c) flanges (17) which extend up to the switch walls, one of the flanges having at its outer side a receiving hole (17a) for a coupling pin and the other having at its outer side a recess (17b) which is larger than the receiving hole.
6. Switching mechanism according to claim 1, characterised in that a wire yoke serves as the ratchet lever (25), the yoke latching with a short prong (21a) of the contact lever (21) which is forked at its one end, and the yoke, at a long prong (21 b) of said contact lever end, being held in engagement therewith, that the contact lever (21) sits with an elongated hole (21 c) on the shaft (14) and by means of a bent portion (21d) engages a lever arm (27a) of the release lever (27), which at the same time serves to release the ratchet lever (25), and that a second lever arm (27b) of the release lever (27) serves for engagement with the release members and as a coupling member in the case of multipolarity, the second lever arm together with a lug (21f) of the contact lever (21) being actuable by the plunger (11) of a magnetic release member (12).
EP80105660A 1979-09-26 1980-09-20 Switch mechanism for circuit breaker Expired EP0026416B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105660T ATE3091T1 (en) 1979-09-26 1980-09-20 SWITCHING MECHANISM FOR CIRCUIT BREAKER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2938858A DE2938858C2 (en) 1979-09-26 1979-09-26 Switching mechanism for a circuit breaker
DE2938858 1979-09-26

Publications (3)

Publication Number Publication Date
EP0026416A1 EP0026416A1 (en) 1981-04-08
EP0026416B1 true EP0026416B1 (en) 1983-04-13
EP0026416B2 EP0026416B2 (en) 1986-02-19

Family

ID=6081835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105660A Expired EP0026416B2 (en) 1979-09-26 1980-09-20 Switch mechanism for circuit breaker

Country Status (3)

Country Link
EP (1) EP0026416B2 (en)
AT (1) ATE3091T1 (en)
DE (1) DE2938858C2 (en)

Families Citing this family (17)

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Publication number Priority date Publication date Assignee Title
DE3119165C2 (en) * 1981-05-14 1986-05-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit breaker as a unit consisting of a circuit breaker as well as auxiliary and signal switches
DE3200325C2 (en) * 1982-01-08 1986-08-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mechanism for an auto switch
US4628288A (en) * 1984-05-15 1986-12-09 Mitsubishi Denki Kabushiki Kaisha Circuit interrupter
DE8500461U1 (en) * 1985-01-10 1986-02-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Latch arrangement of a circuit breaker
US4743878A (en) * 1985-05-01 1988-05-10 Mitsubishi Denki Kabushiki Kaisha Circuit interrupter
DE3517748C1 (en) * 1985-05-17 1986-02-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switching mechanism for a line protection circuit breaker
PT82331B (en) * 1985-05-17 1992-06-30 Licentia Gmbh CHANGE MECHANISM FOR A PROTECTIVE SWITCH
DE3619240A1 (en) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Line protection circuit breaker having a contact arrangement which forms a blowing device
DE3619242C2 (en) * 1986-06-07 1994-07-21 Kloeckner Moeller Gmbh Switching mechanism for a circuit breaker
FR2614467A1 (en) * 1987-04-21 1988-10-28 Telemecanique Electrique PROTECTIVE SWITCHING APPARATUS WITH SIMPLIFIED TRIGGERING MECHANISM
GB8804645D0 (en) * 1988-02-27 1988-03-30 Delta Electrical Holdings Circuit breaker
DE3917326A1 (en) * 1989-05-27 1990-11-29 Licentia Gmbh SWITCHING MECHANISM FOR A CIRCUIT BREAKER
IT218929Z2 (en) * 1989-10-31 1992-11-10 Abb Elettrocondutture Spa MODULAR MINIATURIZED AUTOMATIC SWITCH FOR INDUSTRIAL AND SIMILAR CIVIL ELECTRICAL SYSTEMS
DE4040301A1 (en) * 1990-12-17 1992-07-02 Geyer Gmbh & Co Christian Switching mechanism for circuit breaker - has one-piece trip lever actuated by magnetic or thermal triggers such that it slides sideways to open contacts
DE19735408B4 (en) * 1997-08-14 2008-04-10 Siemens Ag Switching mechanism for a circuit breaker
DE112014007136T5 (en) 2014-11-05 2017-08-03 General Electric Company Circuit breaker with a potential-free movable contact
GB2569669B (en) * 2017-12-22 2022-02-09 Eaton Ind Austria Gmbh Self-compensating mechanism for circuit breaker

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DE1915104A1 (en) * 1969-03-25 1970-10-01 Bbc Brown Boveri & Cie Auto switch
DE2336222A1 (en) * 1973-07-17 1975-01-30 Baco Const Elect Automatic switching mechanism with free trip and forced break - uses only one spring for contact pressure between moving and fixed contacts
DE2544470A1 (en) * 1975-10-04 1977-04-07 Geyer Fa Christian Mechanism for flat automatic switch - has magnetic and possibly also thermal trip, and trip free and manual release
FR2331879A1 (en) * 1975-11-13 1977-06-10 Legrand Sa CIRCUIT BREAKER, IN PARTICULAR MULTIPOLAR CIRCUIT BREAKER
DD132379B1 (en) * 1976-08-02 1981-04-29 Guenther Kammer OVERLOAD CABLE SWITCH IN NARROW CONSTRUCTION
DE7802000U1 (en) * 1978-01-24 1978-10-12 Felten & Guilleaume Carlswerk Ag, 5000 Koeln Miniature circuit breaker in flat design

Also Published As

Publication number Publication date
ATE3091T1 (en) 1983-04-15
DE2938858C2 (en) 1983-10-13
DE2938858A1 (en) 1981-04-02
EP0026416A1 (en) 1981-04-08
EP0026416B2 (en) 1986-02-19

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