EP1005060B1 - Undervoltage release device - Google Patents

Undervoltage release device Download PDF

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Publication number
EP1005060B1
EP1005060B1 EP19990122990 EP99122990A EP1005060B1 EP 1005060 B1 EP1005060 B1 EP 1005060B1 EP 19990122990 EP19990122990 EP 19990122990 EP 99122990 A EP99122990 A EP 99122990A EP 1005060 B1 EP1005060 B1 EP 1005060B1
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EP
European Patent Office
Prior art keywords
lever
tripping
release
spring
detent pawl
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 - Lifetime
Application number
EP19990122990
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German (de)
French (fr)
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EP1005060A3 (en
EP1005060A2 (en
Inventor
Norbert Nitsche
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Eaton Industries GmbH
Original Assignee
Moeller GmbH
Kloeckner Moeller GmbH
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Publication date
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Publication of EP1005060A2 publication Critical patent/EP1005060A2/en
Publication of EP1005060A3 publication Critical patent/EP1005060A3/en
Application granted granted Critical
Publication of EP1005060B1 publication Critical patent/EP1005060B1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/52Manual reset mechanisms which may be also used for manual release actuated by lever

Definitions

  • the invention relates to an undervoltage release for electrical low-voltage circuit breakers.
  • Such an undervoltage release is known, for example, from EP 0 620 580 B1. It comprises a plunger-type magnet armature which can be actuated by an electromagnet and which can be displaced by applying a predefinable control voltage against the pressure of a first spring into a tightened position (switch-on position of the undervoltage release).
  • the tappet-shaped magnet armature acts on a pawl formed as a reversing lever, which holds in the tightened position of the magnet armature acted upon by a second spring and connected to a trigger slide release lever.
  • the plunger-shaped magnet armature is displaced outward by the pressure of the first spring and pivots the pawl, which releases the release lever. This then shifts the trigger slider under the action of the second spring and thereby activates the circuit breaker.
  • a disadvantage of this known undervoltage release inter alia, that the undervoltage release, e.g. after the release of the circuit breaker can only be turned on when the corresponding control voltage is already applied to the solenoid. Otherwise, the plunger-shaped magnet armature continues to press against the pawl and holds it in its release position, so that a latching of the release lever with the pawl is not possible.
  • the invention has for its object to provide an undervoltage release, which can also be moved in the direction of closed position when no control voltage applied to the solenoid.
  • a triggering of the circuit breaker by the undervoltage release should during power-up only be possible if an additional mechanical release of the undervoltage release occurs, the time of release is largely arbitrary preselected.
  • the undervoltage release comprises a pivotable control lever acted upon by a third spring, which is designed as a release lock.
  • the control lever presses against the pawl which holds the release lever, wherein the spring forces and the latched in abutment surfaces of the cooperating lever arms are selected such that a release of the undervoltage release is not possible. If, in contrast, the control lever is pivoted and thus the trigger lock is released, the pawl and the release lever only latched together when a sufficiently large control voltage is applied to the solenoid. Otherwise, the circuit breaker trips again.
  • control lever is designed such that it engages in the intended use of the undervoltage release in a shift gate of the circuit breaker and is pivoted when turning on the circuit breaker such that a first lever arm of the control lever releases a second lever arm of the pawl before the Circuit breaker is in its switching position "ON".
  • the release lever on its side facing away from the trigger slide on a stop for a arranged on the shift gate of the circuit breaker clamping cam, so that when pivoting the shift gate in the switching position "OFF" of the circuit breaker of the clamping cam, the release lever is pivoted until it engages with the pawl.
  • FIGs. 1 and 2 1 denotes an undervoltage release, which is fixed to a non-illustrated in detail low-voltage circuit breaker.
  • the circuit breaker comprises a switching gate 3 provided with a lever 2, by means of which the circuit breaker can be pivoted from its switch position "OFF" (FIG. 1) into its switch position “ON” (FIG. 2).
  • the undervoltage release 1 has an actuatable by an electromagnet 4 stö-shaped magnet armature 5, which is acted upon by a first spring 6 designed as a compression spring.
  • the magnet armature 5 acts via spring-loaded lever-shaped transmission members 7, 8 on a trigger slide 9, which cooperates with a tripping shaft of the circuit breaker, not shown, so that the tripping shaft causes the triggering of a switching mechanism, not shown, and the opening of connected to the switch lock, also not shown contacts ,
  • the lever-shaped transmission members is a pivotable pawl 7 designed as a lever
  • the first lever arm 10 is connected to the plunger-shaped armature 5 and the second lever arm 11 with a push rod 12
  • a trigger lever 8 which actuates the trigger slide 9, on its the push rod 12 facing side has a recess 14 (Fig. 2), in which engages the push rod 12 in the closed position of the undervoltage release 1 (Fig. 1).
  • the release lever 8 is acted upon by a trained as a tension spring second spring 15.
  • the undervoltage release 1 further comprises a pivotable control lever 16 designed as a reversing lever, which is acted upon by a third spring 17 configured as a compression spring.
  • the first lever arm 18 of the control lever 16 and the third spring 17 are designed such that in the initial position shown in Fig. 1 of the control lever 16, in which the circuit breaker in its open position and the undervoltage release are in its closed position, the first lever arm 18th presses against the push rod 12 of the pawl 7 and thus the pawl 7 and the release lever 8 also remain in their Verklinkungswolf when no control voltage applied to the electromagnet 4.
  • the release lever 8 is pivoted abruptly substantially as a result of the tensile force of the second spring 15 after release of the push rod 12 by the control lever 16.
  • the release lever 8 thereby shifts the release slide 9 (FIG. 2), so that it no longer acts on the release shaft of the circuit breaker and causes an empty circuit of the circuit breaker.
  • the lever 2 of the circuit breaker is pivoted to the switching position 0.
  • the second lever arm 19 of the control lever 16 is released and the first lever arm 18 presses with the force of the spring 17 at the same time the second lever arm 19 of the control lever 16 is released the push rod 12, which rolls on the release lever 8.
  • the release lever 8 is pivoted so long until the push rod 12 engages in the recess 14 of the release lever 8.
  • the pawl 7 is pivoted and the magnet armature 5 is pressed by the first lever arm 10 in its closed position. Since in this position the shift gate 3 is also the control lever 16 is back in its initial position (Fig. 1), its first lever arm 10 secures the now reached Verklinkungs ein pawl 7 and release lever. 8
  • the invention is of course not limited to the illustrated embodiment.
  • the first part lever can be used only to control the trip slider and the second part lever only for latching with the pawl, wherein the tension spring 15 acts on the bow-shaped connecting part between the two partial levers.
  • a plurality of mutually parallel tension springs can act on the release lever.
  • a first connecting part is advantageously arranged in the region of the first lever arm, which engages in a corresponding recess of the tappet-shaped magnet armature.
  • the push rod can then be provided as a second connecting part be engaged when locking the release lever in the recess of the corresponding partial lever of the release lever.
  • a third spring instead of a pull and a compression spring can be used when the corresponding spring is arranged on the trigger slide side facing.
  • the pawl is provided with a push rod which engages in the recess 14 of the release lever 8 for latching the two levers, but the pawl can also be designed according to its end facing the release lever itself or with a bolt-shaped Part be provided.

Description

Die Erfindung betrifft einen Unterspannungsauslöser für elektrische Niederspannungs-Schutzschalter.The invention relates to an undervoltage release for electrical low-voltage circuit breakers.

Ein derartiger Unterspannungsauslöser ist beispielsweise aus der EP 0 620 580 B1 bekannt. Er umfasst einen von einem Elektromagneten betätigbaren stößelförmigen Magnetanker, welcher durch Anlegen einer vorgebbaren Steuerspannung gegen den Druck einer ersten Feder in eine angezogene Stellung (Einschaltstellung des Unterspannungsauslösers) verschiebbar ist. Der stößelförmige Magnetanker wirkt auf eine als Umlenkhebel ausgebildete Sperrklinke, die in der angezogenen Stellung des Magnetankers einen von einer zweiten Feder beaufschlagten und mit einem Auslöseschieber verbundenen Auslösehebel hält. Fällt die Steuerspannung unter einen vorgegebenen Wert ab, so wird der stößelförmige Magnetanker durch den Druck der ersten Feder nach außen verschoben und verschwenkt die Sperrklinke, welche den Auslösehebel freigibt. Dieser verschiebt dann unter der Wirkung der zweiten Feder den Auslöseschieber und aktiviert dadurch den Schutzschalter. Nachteilig ist bei diesem bekannten Unterspannungsauslöser unter anderem, dass der Unterspannungsauslöser z.B. nach der Auslösung des Schutzschalters nur dann eingeschaltet werden kann, wenn an dem Elektromagnet die entsprechende Steuerspannung bereits anliegt. Anderenfalls drückt der stößelförmige Magnetanker weiterhin gegen die Sperrklinke und hält diese in ihrer Freigabestellung, so dass ein Verklinken des Auslösehebels mit der Sperrklinke nicht möglich ist.Such an undervoltage release is known, for example, from EP 0 620 580 B1. It comprises a plunger-type magnet armature which can be actuated by an electromagnet and which can be displaced by applying a predefinable control voltage against the pressure of a first spring into a tightened position (switch-on position of the undervoltage release). The tappet-shaped magnet armature acts on a pawl formed as a reversing lever, which holds in the tightened position of the magnet armature acted upon by a second spring and connected to a trigger slide release lever. If the control voltage drops below a predetermined value, the plunger-shaped magnet armature is displaced outward by the pressure of the first spring and pivots the pawl, which releases the release lever. This then shifts the trigger slider under the action of the second spring and thereby activates the circuit breaker. A disadvantage of this known undervoltage release, inter alia, that the undervoltage release, e.g. after the release of the circuit breaker can only be turned on when the corresponding control voltage is already applied to the solenoid. Otherwise, the plunger-shaped magnet armature continues to press against the pawl and holds it in its release position, so that a latching of the release lever with the pawl is not possible.

Der Erfindung liegt die Aufgabe zugrunde, einen Unterspannungsauslöser anzugeben, der auch dann in Richtung Einschaltstellung bewegt werden kann, wenn keine Steuerspannung an dem Elektromagnet anliegt. Ein Auslösen des Schutzschalters durch den Unterspannungsauslöser soll beim Einschaltvorgang erst dann möglich sein, wenn eine zusätzliche mechanische Freigabe des Unterspannungsauslösers erfolgt, wobei der Zeitpunkt der Freigabe weitgehend beliebig vorwählbar ist.The invention has for its object to provide an undervoltage release, which can also be moved in the direction of closed position when no control voltage applied to the solenoid. A triggering of the circuit breaker by the undervoltage release should during power-up only be possible if an additional mechanical release of the undervoltage release occurs, the time of release is largely arbitrary preselected.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Weitere, besonders vorteilhafte Ausgestaltungen der Erfindung offenbaren die Unteransprüche.This object is achieved by the features of the characterizing part of claim 1. Further, particularly advantageous embodiments of the invention disclose the dependent claims.

Die Erfindung beruht im wesentlichen auf dem Gedanken, dass der Unterspannungsauslöser einen durch eine dritte Feder beaufschlagten schwenkbaren Steuerhebel umfasst, der als Auslösesperre ausgebildet ist. In der eingeschalteten Stellung des Unterspannungsauslösers drückt der Steuerhebel gegen die Sperrklinke, die den Auslösehebel hält, wobei die Federkräfte und die im verklinkten Zustand zur Anlage gekommenen Flächen der zusammenwirkenden Hebelarme derart gewählt sind, dass eine Auslösung des Unterspannungsauslösers nicht möglich ist. Wird hingegen der Steuerhebel verschwenkt und damit die Auslösesperre aufgehoben, bleiben die Sperrklinke und der Auslösehebel nur dann miteinander verklinkt, wenn an dem Elektromagnet eine ausreichend große Steuerspannung anliegt. Anderenfalls erfolgt eine erneute Auslösung des Schutzschalters.The invention is essentially based on the idea that the undervoltage release comprises a pivotable control lever acted upon by a third spring, which is designed as a release lock. In the on position of the undervoltage release, the control lever presses against the pawl which holds the release lever, wherein the spring forces and the latched in abutment surfaces of the cooperating lever arms are selected such that a release of the undervoltage release is not possible. If, in contrast, the control lever is pivoted and thus the trigger lock is released, the pawl and the release lever only latched together when a sufficiently large control voltage is applied to the solenoid. Otherwise, the circuit breaker trips again.

Bei einer vorteilhaften Ausführungsform der Erfindung ist der Steuerhebel derart ausgebildet, dass er bei der bestimmungsgemäßen Verwendung des Unterspannungsauslösers in eine Schaltkulisse des Schutzschalters eingreift und beim Einschalten des Schutzschalters derart verschwenkt wird, dass ein erster Hebelarm des Steuerhebels einen zweiten Hebelarm der Sperrklinke freigibt, bevor der Schutzschalter sich in seiner Schaltstellung "EIN" befindet.In an advantageous embodiment of the invention, the control lever is designed such that it engages in the intended use of the undervoltage release in a shift gate of the circuit breaker and is pivoted when turning on the circuit breaker such that a first lever arm of the control lever releases a second lever arm of the pawl before the Circuit breaker is in its switching position "ON".

Bei einer weiteren vorteilhaften Ausführungsform der Erfindung weist der Auslösehebel auf seiner dem Auslöseschieber abgewandten Seite einen Anschlag für einen an der Schaltkulisse des Schutzschalters angeordneten Spannnokken auf, so dass beim Verschwenken der Schaltkulisse in die Schaltstellung "AUS" des Schutzschalters der Spannnocken den Auslösehebel so lange verschwenkt, bis eine Verklinkung mit der Sperrklinke erfolgt.In a further advantageous embodiment of the invention, the release lever on its side facing away from the trigger slide on a stop for a arranged on the shift gate of the circuit breaker clamping cam, so that when pivoting the shift gate in the switching position "OFF" of the circuit breaker of the clamping cam, the release lever is pivoted until it engages with the pawl.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden, anhand von Figuren erläuterten Ausführungsbeispiel. Es zeigen

Figur 1:
eine vereinfachte Darstellung eines erfindungsgemäßen Unterspannungsauslösers in seiner Einschaltstellung und;
Figur 2:
den in Fig. 1 wiedergegebenen Unterspannungsauslöser in seiner Freigabestellung.
Further details and advantages of the invention will become apparent from the following, explained with reference to figures embodiment. Show it
FIG. 1:
a simplified representation of an undervoltage release according to the invention in its closed position and;
FIG. 2:
the reproduced in Fig. 1 undervoltage release in its release position.

In den Fig. 1 und 2 ist mit 1 ein Unterspannungsauslöser bezeichnet, der an einem nicht im einzelnen dargestellten Niederspannungs-Schutzschalter befestigt ist. Der Schutzschalter umfasst eine mit einem Hebel 2 versehene Schaltkulisse 3, mittels der der Schutzschalter von seiner Schaltstellung "AUS" (Fig. 1) in seine Schaltstellung "EIN" (Fig. 2) verschwenkbar ist. Der Unterspannungsauslöser 1 weist einen von einem Elektromagneten 4 betätigbaren stö-ßelförmigen Magnetanker 5 auf, welcher von einer als Druckfeder ausgebildeten ersten Feder 6 beaufschlagt wird. Der Magnetanker 5 wirkt über federbelastete hebelförmige Übertragungsglieder 7, 8 auf einen Auslöseschieber 9, welcher mit einer nicht dargestellten Auslösewelle des Schutzschalters zusammenwirkt, so dass die Auslösewelle das Auslösen eines nicht dargestellten Schaltschlosses und das Öffnen von mit dem Schaltschloss verbundenen, ebenfalls nicht dargestellten Kontakten bewirkt. Bei den hebelförmigen Übertragungsgliedern handelt es sich um eine als Umlenkhebel ausgebildete schwenkbare Sperrklinke 7, deren erster Hebelarm 10 mit dem stößelförmigen Magnetanker 5 und deren zweiter Hebelarm 11 mit einer Druckstange 12 verbunden ist, sowie um einen den Auslöseschieber 9 betätigenden Auslösehebel 8, der auf seiner der Druckstange 12 zugewandten Seite eine Ausnehmung 14 (Fig. 2) aufweist, in die die Druckstange 12 in der Einschaltstellung des Unterspannungsauslösers 1 eingreift (Fig. 1). Der Auslösehebel 8 wird durch eine als Zugfeder ausgebildete zweite Feder 15 beaufschlagt.In Figs. 1 and 2, 1 denotes an undervoltage release, which is fixed to a non-illustrated in detail low-voltage circuit breaker. The circuit breaker comprises a switching gate 3 provided with a lever 2, by means of which the circuit breaker can be pivoted from its switch position "OFF" (FIG. 1) into its switch position "ON" (FIG. 2). The undervoltage release 1 has an actuatable by an electromagnet 4 stö-shaped magnet armature 5, which is acted upon by a first spring 6 designed as a compression spring. The magnet armature 5 acts via spring-loaded lever-shaped transmission members 7, 8 on a trigger slide 9, which cooperates with a tripping shaft of the circuit breaker, not shown, so that the tripping shaft causes the triggering of a switching mechanism, not shown, and the opening of connected to the switch lock, also not shown contacts , In the lever-shaped transmission members is a pivotable pawl 7 designed as a lever, the first lever arm 10 is connected to the plunger-shaped armature 5 and the second lever arm 11 with a push rod 12, and a trigger lever 8 which actuates the trigger slide 9, on its the push rod 12 facing side has a recess 14 (Fig. 2), in which engages the push rod 12 in the closed position of the undervoltage release 1 (Fig. 1). The release lever 8 is acted upon by a trained as a tension spring second spring 15.

Erfindungsgemäß umfasst der Unterspannungsauslöser 1 ferner einen als Umlenkhebel ausgebildeten schwenkbaren Steuerhebel 16, der durch eine als Druckfeder ausgestaltete dritte Feder 17 beaufschlagt wird. Der erste Hebelarm 18 des Steuerhebels 16 und die dritte Feder 17 sind derart ausgebildet, dass in der in Fig. 1 dargestellten Ausgangsstellung des Steuerhebels 16, bei der der Schutzschalter sich in seiner Ausschaltstellung und der Unterspannungsauslöser sich in seiner Einschaltstellung befinden, der erste Hebelarm 18 gegen die Druckstange 12 der Sperrklinke 7 drückt und damit die Sperrklinke 7 und der Auslösehebel 8 auch dann in ihrer Verklinkungsstellung verbleiben, wenn keine Steuerspannung an dem Elektromagneten 4 anliegt.According to the invention, the undervoltage release 1 further comprises a pivotable control lever 16 designed as a reversing lever, which is acted upon by a third spring 17 configured as a compression spring. The first lever arm 18 of the control lever 16 and the third spring 17 are designed such that in the initial position shown in Fig. 1 of the control lever 16, in which the circuit breaker in its open position and the undervoltage release are in its closed position, the first lever arm 18th presses against the push rod 12 of the pawl 7 and thus the pawl 7 and the release lever 8 also remain in their Verklinkungsstellung when no control voltage applied to the electromagnet 4.

Wird der Hebel 2 des Schutzschalters von seiner mit 0 bezeichneten Schaltstellung "AUS" in die mit l bezeichnete Schaltstellung "EIN" (Fig. 2) verschwenkt, so wird der zweite Hebelarm 19 des Steuerhebels 16 durch die Schaltkulisse 3 nach unten und der erste Hebelarm 18 nach oben verschwenkt, so dass keine Abstützung des ersten Hebelarmes an der Druckstange 12 mehr erfolgt. Liegt zu diesem Zeitpunkt (etwa durch einen mit der Schaltkulisse verbundenen voreilenden Hilfsschalter) eine ausreichend hohe Steuerspannung an dem Elektromagnet 4, so wird die Druckstange 12 der Sperrklinke 7 durch den stößelförmigen Magnetanker 5 weiterhin in die Ausnehmung 14 des Auslösehebels 8 gedrückt. In diesem Fall verbleiben Sperrklinke 7 und Auslösehebel 8 weiterhin in ihrer in Fig. 1 dargestellten Verklinkungsstellung. Der Schutzschalter kann dann bis in die Schaltstellung 1 verschwenkt und in dieser Stellung belassen werden.If the lever 2 of the circuit breaker is pivoted from its switching position "OFF" denoted by 0 into the switching position "ON" (FIG. 2) designated l, the second lever arm 19 of the control lever 16 is moved downwards through the shifting gate 3 and the first lever arm 18 pivoted upward, so that no support of the first lever arm on the push rod 12 is more. If a sufficiently high control voltage at the electromagnet 4 is present at this point in time (for example, by a leading auxiliary switch connected to the shifting gate), then the push rod 12 of the pawl 7 is pressed into the recess 14 of the trigger lever 8 by the tappet magnet armature 5. In this case, pawl 7 and release lever 8 remain in their Verklinkungsstellung shown in Fig. 1. The circuit breaker can then be pivoted to the switch position 1 and left in this position.

Ist hingegen die an dem Elektromagnet 4 anliegende Steuerspannung zu niedrig (z.B. weil irrdem entsprechenden Netz ein Kurzschluss vorliegt), so wird nach Freigabe der Druckstange 12 durch den Steuerhebel 16 der Auslösehebel 8 im wesentlichen infolge der Zugkraft der zweiten Feder 15 schlagartig verschwenkt. Der Auslösehebel 8 verschiebt dabei den Auslöseschieber 9 (Fig. 2), so dass dieser nicht mehr auf die Auslösewelle des Schutzschalters wirkt und eine Leerschaltung des Schutzschalters bewirkt.If, on the other hand, the control voltage applied to the electromagnet 4 is too low (eg due to a short-circuit in the corresponding network), the release lever 8 is pivoted abruptly substantially as a result of the tensile force of the second spring 15 after release of the push rod 12 by the control lever 16. The release lever 8 thereby shifts the release slide 9 (FIG. 2), so that it no longer acts on the release shaft of the circuit breaker and causes an empty circuit of the circuit breaker.

Um anschließend den Unterspannungsauslöser 1 von seiner Freigabestellung wieder in seine Einschaltstellung zu bringen, wird der Hebel 2 des Schutzschalters in die Schaltstellung 0 verschwenkt. Dabei drückt ein an der Schaltkulisse 3 angeordneter Spannnocken 20 gegen einen Anschlag 21 des Auslösehebels 8 und verschwenkt diesen gegen den Druck der Zugfeder 15. Gleichzeitig wird der zweite Hebelarm 19 des Steuerhebels 16 freigegeben und der erste Hebelarm 18 drückt mit der Kraft der Feder 17 auf die Druckstange 12, die auf dem Auslösehebel 8 abrollt. Der Auslösehebel 8 wird so lange verschwenkt, bis die Druckstange 12 in die Ausnehmung 14 des Auslösehebels 8 eingreift. Dadurch wird die Sperrklinke 7 verschwenkt und der Magnetanker 5 wird durch den ersten Hebelarm 10 in seine Einschaltstellung gedrückt. Da bei dieser Stellung der Schaltkulisse 3 sich auch der Steuerhebel 16 wieder in seiner Ausgangsstellung befindet (Fig. 1), sichert sein erster Hebelarm 10 die nun erreichte Verklinkungsstellung von Sperrklinke 7 und Auslösehebel 8.To then bring the undervoltage release 1 of its release position back to its on position, the lever 2 of the circuit breaker is pivoted to the switching position 0. At the same time the second lever arm 19 of the control lever 16 is released and the first lever arm 18 presses with the force of the spring 17 at the same time the second lever arm 19 of the control lever 16 is released the push rod 12, which rolls on the release lever 8. The release lever 8 is pivoted so long until the push rod 12 engages in the recess 14 of the release lever 8. As a result, the pawl 7 is pivoted and the magnet armature 5 is pressed by the first lever arm 10 in its closed position. Since in this position the shift gate 3 is also the control lever 16 is back in its initial position (Fig. 1), its first lever arm 10 secures the now reached Verklinkungsstellung pawl 7 and release lever. 8

Die Erfindung ist selbstverständlich nicht auf das dargestellte Ausführungsbeispiel beschränkt. So hat es sich beispielsweise als vorteilhaft erwiesen, ähnlich wie im Falle der eingangs erwähnten EP 0 620 580 B1, die Sperrklinke und den Auslösehebel als Doppelhebel auszubilden, wobei die jeweils beiden parallel zueinander angeordneten Teilhebel über mindestens ein bügelförmiges Verbindungsteil miteinander verbunden sind und jedem der Teilhebel unterschiedliche Funktionen zugeordnet werden. So kann der erste Teilhebel nur zur Ansteuerung des Auslöseschiebers und der zweite Teilhebel nur zur Verklinkung mit der Sperrklinke verwendet werden, wobei die Zugfeder 15 auf das bügelförmige Verbindungsteil zwischen den beiden Teilhebeln einwirkt. Dabei können selbstverständlich auch mehrere parallel zueinander angeordnete Zugfedern auf den Auslösehebel wirken.The invention is of course not limited to the illustrated embodiment. For example, it has proved to be advantageous, as in the case of the aforementioned EP 0 620 580 B1, to design the pawl and the release lever as a double lever, wherein the two mutually parallel partial levers are connected to one another via at least one bow-shaped connecting part and each of Part lever different functions are assigned. Thus, the first part lever can be used only to control the trip slider and the second part lever only for latching with the pawl, wherein the tension spring 15 acts on the bow-shaped connecting part between the two partial levers. Of course, a plurality of mutually parallel tension springs can act on the release lever.

Sofern auch die Sperrklinke aus zwei parallel zueinander angeordneten Teilhebeln besteht, wird vorteilhafterweise im Bereich des ersten Hebelarmes ein erstes Verbindungsteil angeordnet, welches in eine entsprechende Ausnehmung des stößelförmigen Magnetankers eingreift. Im Bereich des zweiten Hebelarmes kann dann die Druckstange als zweites Verbindungsteil vorgesehen werden, die beim Verklinken des Auslösehebels in die Ausnehmung des entsprechenden Teilhebels des Auslösehebels eingreift.If the pawl also consists of two partial levers arranged parallel to one another, a first connecting part is advantageously arranged in the region of the first lever arm, which engages in a corresponding recess of the tappet-shaped magnet armature. In the region of the second lever arm, the push rod can then be provided as a second connecting part be engaged when locking the release lever in the recess of the corresponding partial lever of the release lever.

Selbstverständlich kann als dritte Feder anstatt einer Zug- auch eine Druckfeder verwendet werden, wenn die entsprechende Feder auf der dem Auslöseschieber zugewandten Seite angeordnet wird.Of course, as a third spring instead of a pull and a compression spring can be used when the corresponding spring is arranged on the trigger slide side facing.

Schließlich ist es auch nicht zwingend erforderlich, dass die Sperrklinke mit einer Druckstange versehen ist, die in die Ausnehmung 14 des Auslösehebels 8 zum Verklinken der beiden Hebel eingreift, sondern die Sperrklinke kann an ihrem dem Auslösehebel zugewandten Ende auch selbst entsprechend ausgestaltet oder mit einem bolzenförmigen Teil versehen werden.Finally, it is not absolutely necessary that the pawl is provided with a push rod which engages in the recess 14 of the release lever 8 for latching the two levers, but the pawl can also be designed according to its end facing the release lever itself or with a bolt-shaped Part be provided.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
UnterspannungsauslöserUndervoltage release
22
Hebellever
33
Schaltkulisseshift gate
44
Elektromagnetelectromagnet
55
Magnetankerarmature
66
erste Federfirst spring
77
Sperrklinke, ÜbertragungsgliedPawl, transmission link
88th
Auslösehebel, ÜbertragungsgliedRelease lever, transmission link
99
Auslöseschiebertrip slider
1010
erster Hebelarm (Sperrklinke)first lever arm (pawl)
1111
zweiter Hebelarm (Sperrklinke)second lever arm (pawl)
1212
Druckstangepushrod
1414
Ausnehmungrecess
1515
zweite Feder, Zugfedersecond spring, tension spring
1616
Steuerhebelcontrol lever
1717
dritte Federthird spring
1818
erster Hebelarm (Steuerhebel)first lever arm (control lever)
1919
zweiter Hebelarm (Steuerhebel)second lever arm (control lever)
2020
Spannnockentightening cams
2121
Anschlagattack
2222
Wirkflächeeffective area
2323
Mitnehmertakeaway

Claims (5)

  1. Undervoltage release for electrical low-voltage circuit breakers, comprising a plunger-like magnet armature (5), which can be actuated by an electromagnet (4) and can be moved to an attracted position, against the pressure of a first spring (6), by a predeterminable control voltage being applied, the magnet armature (5) acting on a tripping slide (9) via spring-loaded, lever-like transmission elements (7, 8) such that, when the control voltage is not reached, the tripping slide (9) causes the circuit breaker to trip, and the lever-like transmission elements (7, 8) comprising a detent pawl (7) which can pivot and a tripping lever (8) which can pivot and which activates the tripping slide (9) and is loaded by at least a second spring (15), the detent pawl (7) interacting with the plunger-like magnet armature (5) and with the tripping lever (8) such that, in the attracted position of the magnet armature (5), the detent pawl (7) can be latched with the tripping lever (8), characterized in that a control lever (16) is formed which is coupled in terms of movement to a manually operated switching link (3), is loaded by a third spring (17) and can pivot from an initial position to a release position, in that, in the initial position, the control lever (16) is pushed against the detent pawl (7) by the third spring (17) if the tripping lever (8) is in the latched position, in that the control lever (17) holds the detent pawl (7) and the tripping lever (8) in this position, and in that, in the release position, the detent pawl (7) and the tripping lever (8) are no longer supported.
  2. Undervoltage release according to Claim 1, characterized in that the tripping lever (8) comprises two lever elements, which are arranged parallel to one another and are connected to one another via a clip-like connecting part, in that the tripping slide (9) is fixed to the first lever element, and in that the second lever element is operatively connected to the detent pawl (7).
  3. Undervoltage release according to Claim 1 or 2, characterized in that the detent pawl (7) comprises two lever elements which are connected to one another via connecting parts, in that a connecting part arranged in the region of the first lever arm (10) is formed in a corresponding cutout in the plunger-like magnet armature (5), and a connecting part arranged in the region of the second lever arm (11) is in the form of a push rod (12), which engages in a corresponding cutout (14) in the tripping lever (8) when the tripping lever (8) is latched.
  4. Undervoltage release according to one of Claims 1 to 3, characterized in that the control lever (16) is designed such that, when the undervoltage release (1) is used correctly, it engages in a switching link (3) of the circuit breaker and, when the circuit breaker is switched on, is pivoted from its initial position to its release position, with the result that a first lever arm (18) of the control lever (16) releases a second lever arm (11) of the detent pawl (7).
  5. Undervoltage release according to Claim 4, characterized in that the tripping lever (8) has a stop (21) for a clamping cam (20), which is arranged on the switching link (3) of the circuit breaker, on that side of the tripping lever (8) which is remote from the tripping slide (9), against which stop (21) said clamping cam (20) presses when the circuit breaker is switched off and latches the tripping lever (8) with the detent pawl (7) against the pressure of the second spring (15).
EP19990122990 1998-11-23 1999-11-19 Undervoltage release device Expired - Lifetime EP1005060B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998153901 DE19853901C1 (en) 1998-11-23 1998-11-23 Undervoltage release
DE19853901 1998-11-23

Publications (3)

Publication Number Publication Date
EP1005060A2 EP1005060A2 (en) 2000-05-31
EP1005060A3 EP1005060A3 (en) 2001-07-11
EP1005060B1 true EP1005060B1 (en) 2006-06-21

Family

ID=7888664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990122990 Expired - Lifetime EP1005060B1 (en) 1998-11-23 1999-11-19 Undervoltage release device

Country Status (2)

Country Link
EP (1) EP1005060B1 (en)
DE (1) DE19853901C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620970A1 (en) 2012-01-26 2013-07-31 Eaton Industries GmbH Remote control with expansion member

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4110769B2 (en) * 2001-08-27 2008-07-02 三菱電機株式会社 Circuit breaker
DE10145059C1 (en) * 2001-09-13 2003-03-13 Moeller Gmbh Multi-pole switching device provided with interchangable undervoltage release with integrated auxiliary switch operated in released position
DE10320681B4 (en) * 2003-04-30 2006-10-19 Siemens Ag Switch lock for latching a selector shaft and electrical switch with such a switch lock
EP2426691B1 (en) * 2010-09-06 2015-11-04 ABB Technology AG Mechanical override device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE255819C (en) *
FR2704090B1 (en) * 1993-04-16 1995-06-23 Merlin Gerin AUXILIARY TRIGGER FOR CIRCUIT BREAKER.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620970A1 (en) 2012-01-26 2013-07-31 Eaton Industries GmbH Remote control with expansion member

Also Published As

Publication number Publication date
EP1005060A3 (en) 2001-07-11
EP1005060A2 (en) 2000-05-31
DE19853901C1 (en) 2000-06-15

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