EP0333650B1 - Power transmission in an electromagnetic trip device of a fitted circuit breaker - Google Patents

Power transmission in an electromagnetic trip device of a fitted circuit breaker Download PDF

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Publication number
EP0333650B1
EP0333650B1 EP89810164A EP89810164A EP0333650B1 EP 0333650 B1 EP0333650 B1 EP 0333650B1 EP 89810164 A EP89810164 A EP 89810164A EP 89810164 A EP89810164 A EP 89810164A EP 0333650 B1 EP0333650 B1 EP 0333650B1
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EP
European Patent Office
Prior art keywords
spring
armature
accordance
flange
trip
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
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EP89810164A
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German (de)
French (fr)
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EP0333650A1 (en
Inventor
Stephan Spengler
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ABB Patent GmbH
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ABB Patent GmbH
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Priority to AT89810164T priority Critical patent/ATE89949T1/en
Publication of EP0333650A1 publication Critical patent/EP0333650A1/en
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    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection

Definitions

  • the invention relates to a method for transmitting power in the electromagnetic release system of an installation built-in switch of electrical low-voltage distribution networks which switches off in the event of overcurrent, in particular a motor protection switch, the release system acting on a switch lock essentially comprising a yoke, a core, a coil, a coil body, a displaceable armature and includes an armature spring returning the armature when the strong overcurrent is interrupted.
  • the invention further relates to a device for performing the method.
  • Electrical tripping systems of installation built-in switches serve among other things to immediately switch off the circuit monitored by the switch at an overcurrent or short circuit 10 to 15 times greater than the nominal current.
  • the armature is drawn into the coil body by means of the magnetic field generated by the coil.
  • the retracting movement of the armature is used by mechanical means to separate the contacts pressed together by spring force. After the contacts have been separated, the electromagnetic field is reduced and a return element pulls the anchor back into the rest position.
  • the inventors have set themselves the task of creating a method and a device of the type mentioned at the outset which simplify the transmission of force in an electromagnetic release system, allow the production costs to be reduced and work with greater operational reliability.
  • the object is achieved according to the invention by moving the armature over a first spring leg of the coil spring, which is designed as a helical spring and is mounted at the other end in a rotationally fixed manner by means of a second spring leg, is transmitted directly to a trigger slide for actuating the switch lock.
  • the key switch can be operated with very little effort thanks to the smooth-running trigger slide.
  • the key switch in turn releases the spring forces stored by means of the manual actuation of the switch lever, the circuit is interrupted.
  • the release system can be designed such that not only the armature movement of the electromagnetic release, but also the movement of the bimetal and possibly the undervoltage release is transmitted to the same release slide.
  • the second spring leg is preferably used for pretensioning. In this way, the return force can be set at given spring constants.
  • Preloading the armature spring with various setting options allows adaptation to different response values of the electromagnetic release system.
  • the armature spring should hold back the armature up to a certain overcurrent, in practice up to 10 - 15 times the nominal current.
  • the pretensioning is preferably carried out by latching the bent second spring leg in one of the different positions.
  • the object is achieved according to the invention in that the first spring leg of the armature spring connected to the armature has means for direct transmission of the armature movement, at least in the direction of the core of the electromagnetic release system, and a release slide actuating the switch lock for receiving the movement transmitted by the first spring leg.
  • the coil former is preferably designed such that the armature spring can be accommodated in a bearing housing formed on one side. Before mounting the anchor spring, the bearing housing is open. The spring is wound on a mandrel or placed in a trough and the plastic bearing housing is subsequently closed.
  • the electromagnetic release system is arranged on an angled housing rib 10 of a motor protection switch.
  • a yoke 12 with an opening for an essentially sleeve-shaped core 14, which in turn is anchored in the housing rib 10 across the bottom of the yoke 12.
  • a coaxial bobbin 16 is wound over the core 14, on which the coil 18 is wound in order to generate the magnetic field.
  • the same molded part made of plastic includes the bearing housing 21 for the helical anchor spring 22, which is arranged on a mandrel or, as in the present case, in a correspondingly shaped depression 24 of the bearing housing 21.
  • a first spring leg 26 of the armature spring 22 runs approximately tangentially away from the spring, is bent over for the first time and runs in the direction of the axis L of the armature spring 22.
  • the length a (FIG. 3) of the piece 27 of the spring extending outside the spring in the direction L.
  • the first spring leg 26 is about 2-6 mm in conventional installation built-in switches.
  • this piece can be semicircular or the like.
  • the first spring leg 26 runs in the direction of the armature 28, which can be displaced in the longitudinal direction in the coil former 16 along the axis A.
  • the armature 28 has a deeply cut annular groove 32 in the region of the armature head 30. The end of the first spring leg 26 is looped around the neck of the armature 28 in this annular groove.
  • the first spring leg 26 is also carried along. As a result, the armature spring 22 also rotates, decreasing in the direction L away from the first spring leg 26.
  • the armature spring 28 is secured against rotation on the second spring leg 36.
  • This second spring leg 36 which also runs tangentially from the spring, is bent in the direction of the spring axis L, pointing away from the armature spring 22.
  • the free end of the second spring leg 36 rests on a web 38 integrally formed on the bearing housing 21.
  • This web 38 viewed in the direction L from the right, is in the form of a segment of a circle and has grooves 40 for latching the free end of the second spring leg 36.
  • Fig. 1 shows the armature 28 in the position distant from the core 14 in the coil body 16, the rest position R. If an overcurrent flows through the coil 18 and generates a magnetic field, the armature 28 is pulled up to the core 14 into the coil body, the Armature spring 22 transmits the movement to the trigger slide 44 (FIG. 2). A plastic striker pin, not shown, is actuated by the armature 28. After the electrical contacts of the installation built-in switch have been disconnected, the magnetic field is immediately removed, the armature 28 is pulled back into the rest position R by the armature spring 22. A stop 42 of the bearing housing 21 fixes the armature 28 held by spring force in the rest position, which is indicated by an R on the armature head 30. The distance drawn between the anchor head 30 and the stop 42 because of the clarity does not really exist.
  • FIG. 2 shows part of the trigger slide 44, which extends over three electromagnetic trigger elements arranged in the same housing.
  • the armature spring 22 of the trigger element shown is visible, the first spring leg 26 of which rests on the trigger slide 44. This acts when the armature 28 shown in the rest position R moves a release pawl of the switch lock, not shown.
  • the second spring leg 36 which is arranged at the rear in the viewing direction, is bent away from the viewer and engages with the free end in a groove 40 of the web 38.
  • the armature spring 22 shown in FIG. 3 corresponds essentially to that of FIG. 1 and has a correspondingly designed first spring leg 26 with a piece 27 of length a running parallel to the longitudinal axis L of the armature spring 22 and a second spring leg 36 bent away from the spring pointing away.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Transmitters (AREA)

Abstract

A fitted circuit breaker which switches off in the event of excess current, comprises a trip device, which acts on a switching mechanism, having a yoke (12), a core (14), a coil (18), a coil former (16), a moveable armature (28) and an armature spring (22) which returns the armature in the event of interruption of the heavy excess current. The movement of the armature (28) is transmitted via a first spring limb (26) of the armature spring (22), which is designed as a helical spring and is supported in a rotationally fixed manner on the other end by means of a second spring limb (36), directly onto a trip slide for operating the switching mechanism. The first spring limb (26), connected to the armature (28), has means for the direct transmission of the armature movement, at least in the direction of the core (14) of the electromagnetic trip device. The trip slide operating the switching mechanism has means for absorbing the movement transmitted by the first spring limb (26). <IMAGE>

Description

Die Erfindung bezieht sich auf ein Verfahren zur Kraftübertragung im elektromagnetischen Auslösesystem eines bei Ueberstrom abschaltenden Installationseinbauschalters von elektrischen Niederspannungsverteilnetzen, insbesondere eines Motorschutzschalters, wobei das auf ein Schaltschloss einwirkende Auslösesystem im wesentlichen ein Joch, einen Kern, eine Spule, einen Spulenkörper, einen verschiebbaren Anker und eine den Anker beim Unterbruch des starken Ueberstroms zurückholende Ankerfeder umfasst. Weiter betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for transmitting power in the electromagnetic release system of an installation built-in switch of electrical low-voltage distribution networks which switches off in the event of overcurrent, in particular a motor protection switch, the release system acting on a switch lock essentially comprising a yoke, a core, a coil, a coil body, a displaceable armature and includes an armature spring returning the armature when the strong overcurrent is interrupted. The invention further relates to a device for performing the method.

Elektrische Auslösesysteme von Installationseinbauschaltern dienen u.a. dazu, den vom Schalter überwachten Stromkreis bei einem bezogen auf den Nennstrom 10 bis 15-fachen Ueberstrom bzw. Kurzschluss sofort abzuschalten. Mittels des von der Spule erzeugten Magnetfeldes wird der Anker in den Spulenkörper gezogen. Dabei wird mit mechanischen Mitteln die Einzugsbewegung des Ankers dazu ausgenützt, die mit Federkraft aufeinander gedrückten Kontakte zu trennen. Nach dem Trennen der Kontakte wird das elektromagnetische Feld abgebaut, und ein Rückholorgan zieht den Anker wieder in die Ruhelage zurück.Electrical tripping systems of installation built-in switches serve among other things to immediately switch off the circuit monitored by the switch at an overcurrent or short circuit 10 to 15 times greater than the nominal current. The armature is drawn into the coil body by means of the magnetic field generated by the coil. The retracting movement of the armature is used by mechanical means to separate the contacts pressed together by spring force. After the contacts have been separated, the electromagnetic field is reduced and a return element pulls the anchor back into the rest position.

Die Erfinder haben sich die Aufgabe gestellt, ein Verfahren und eine Vorrichtung der eingangs genannten Art zu schaffen, welche die Kraftübertragung in einem elektromagnetischen Auslösesystem vereinfachen, die Herstellungskosten zu erniedrigen erlauben und mit höherer Betriebssicherheit arbeiten.The inventors have set themselves the task of creating a method and a device of the type mentioned at the outset which simplify the transmission of force in an electromagnetic release system, allow the production costs to be reduced and work with greater operational reliability.

In bezug auf das Verfahren wird die Aufgabe erfindungsgemäss gelöst, indem die Bewegung des Ankers über einen ersten Federschenkel der als Schraubenfeder ausgebildeten, mittels eines zweiten Federschenkels andernends drehfest gelagerten Ankerfeder direkt auf einen Auslöseschieber zur Betätigung des Schaltschlosses übertragen wird.In relation to the method, the object is achieved according to the invention by moving the armature over a first spring leg of the coil spring, which is designed as a helical spring and is mounted at the other end in a rotationally fixed manner by means of a second spring leg, is transmitted directly to a trigger slide for actuating the switch lock.

Das Schaltschloss kann durch den leichtgängigen Auslöseschieber mit sehr kleinem Kraftaufwand betätigt werden. Das Schaltschloss seinerseits setzt die mittels der manuellen Betätigung des Schalthebels gespeicherten Federkräfte frei, der Stromkreis wird unterbrochen.The key switch can be operated with very little effort thanks to the smooth-running trigger slide. The key switch in turn releases the spring forces stored by means of the manual actuation of the switch lever, the circuit is interrupted.

Das Auslösesystem kann derart konzipiert sein, dass nicht nur die Ankerbewegung der elektromagnetischen Auslösung, sondern auch die Bewegung des Bimetalls und gegebenenfalls des Unterspannungsauslösers auf denselben Auslöseschieber übertragen wird.The release system can be designed such that not only the armature movement of the electromagnetic release, but also the movement of the bimetal and possibly the undervoltage release is transmitted to the same release slide.

Der zweite Federschenkel dient, neben der drehfesten Lagerung der Feder, bevorzugt dem Vorspannen. Dadurch kann bei gegebenen Federkonstanten die Rückholkraft eingestellt werden.In addition to the non-rotatable mounting of the spring, the second spring leg is preferably used for pretensioning. In this way, the return force can be set at given spring constants.

Das Vorspannen der Ankerfeder mit verschiedenen Einstellmöglichkeiten erlaubt eine Anpassung an verschiedene Ansprechwerte des elektromagnetischen Auslösesystems. Die Ankerfeder soll den Anker bis zu einem bestimmten Ueberstrom zurückhalten, in der Praxis bis zum 10 - 15fachen Nennstrom. Das Vorspannen erfolgt vorzugsweise durch Einrasten des umgebogenen zweiten Federschenkels in einer der verschiedenen Positionen.Preloading the armature spring with various setting options allows adaptation to different response values of the electromagnetic release system. The armature spring should hold back the armature up to a certain overcurrent, in practice up to 10 - 15 times the nominal current. The pretensioning is preferably carried out by latching the bent second spring leg in one of the different positions.

In bezug auf die Vorrichtung wird die Aufgabe erfindungsgemäss dadurch gelöst, dass der mit dem Anker verbundene erste Federschenkel der Ankerfeder Mittel zur direkten Uebertragung der Ankerbewegung hat, wenigstens in Richtung des Kerns des elektromagnetischen Auslösesystems, und ein das Schaltschloss betätigender Auslöseschieber Mittel zur Aufnahme der vom ersten Federschenkel übertragenen Bewegung aufweist.With regard to the device, the object is achieved according to the invention in that the first spring leg of the armature spring connected to the armature has means for direct transmission of the armature movement, at least in the direction of the core of the electromagnetic release system, and a release slide actuating the switch lock for receiving the movement transmitted by the first spring leg.

Vorzugsweise ist der Spulenkörper so ausgebildet, dass in einem einseitig angeformten Lagergehäuse die Ankerfeder aufgenommen werden kann. Vor der Montage der Ankerfeder ist deren Lagergehäuse offen. Die Feder wird auf einen Dorn aufgezogen oder in eine Mulde gelegt und das Lagergehäuse aus Kunststoff nachher geschlossen.The coil former is preferably designed such that the armature spring can be accommodated in a bearing housing formed on one side. Before mounting the anchor spring, the bearing housing is open. The spring is wound on a mandrel or placed in a trough and the plastic bearing housing is subsequently closed.

Die Erfindung wird anhand der in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen schematisch:

  • Fig. 1 einen Axialschnitt durch das elektromagnetische Auslösesystem in einem Motorschutzschalter,
  • Fig. 2 eine Teilansicht von Fig. 1 von links, mit der Ankerfeder und dem Auslöseschieber, und
  • Fig. 3 eine perspektivische Ansicht einer freigelegten Ankerfeder.
The invention is explained in more detail using the exemplary embodiments shown in the drawing. They show schematically:
  • 1 is an axial section through the electromagnetic release system in a motor protection switch,
  • Fig. 2 is a partial view of Fig. 1 from the left, with the armature spring and the trigger slide, and
  • Fig. 3 is a perspective view of an exposed anchor spring.

Das elektromagnetische Auslösesystem ist auf einer abgewinkelten Gehäuserippe 10 eines Motorschutzschalters angeordnet. In der abgewinkelten Gehäuserippe sitzt ein Joch 12 mit einer Oeffnung für einen im wesentlichen hülsenförmig ausgebildeten Kern 14, welcher seinerseits, den Boden des Jochs 12 übergreifend, in der Gehäuserippe 10 verankert ist. Ueber den Kern 14 ist ein koaxialer Spulenkörper 16 aufgezogen, auf welchen die Spule 18 zur Erzeugung des Magnetfeldes gewickelt ist.The electromagnetic release system is arranged on an angled housing rib 10 of a motor protection switch. In the angled housing rib there is a yoke 12 with an opening for an essentially sleeve-shaped core 14, which in turn is anchored in the housing rib 10 across the bottom of the yoke 12. A coaxial bobbin 16 is wound over the core 14, on which the coil 18 is wound in order to generate the magnetic field.

Einstückig mit dem Spulenkörper 16 ausgebildet ist ein Flansch 20, welcher sich innerhalb des im wesentlichen U-förmig ausgebildeten Jochs 12 befindet. Zum selben Spritzteil aus Kunststoff gehört das Lagergehäuse 21 für die schraubenlinienförmig ausgebildete Ankerfeder 22, welche auf einem Dorn bzw., wie im vorliegenden Fall, in einer entsprechend ausgeformten Mulde 24 des Lagergehäuses 21 angeordnet ist.A flange 20, which is located within the essentially U-shaped yoke 12, is formed in one piece with the coil former 16. The same molded part made of plastic includes the bearing housing 21 for the helical anchor spring 22, which is arranged on a mandrel or, as in the present case, in a correspondingly shaped depression 24 of the bearing housing 21.

Ein erster Federschenkel 26 der Ankerfeder 22 läuft etwa tangential von der Feder weg, wird ein erstes Mal umgebogen und verläuft in Richtung der Achse L der Ankerfeder 22. Die Länge a (Fig. 3) des ausserhalb der Feder in Richtung L verlaufenden Stücks 27 des ersten Federschenkels 26 beträgt in üblichen Installationseinbauschaltern etwa 2 - 6 mm. Selbstverständlich kann nach andern Ausführungsformen der Feder dieses Stück halbkreisförmig oder dgl. ausgebildet sein.A first spring leg 26 of the armature spring 22 runs approximately tangentially away from the spring, is bent over for the first time and runs in the direction of the axis L of the armature spring 22. The length a (FIG. 3) of the piece 27 of the spring extending outside the spring in the direction L. The first spring leg 26 is about 2-6 mm in conventional installation built-in switches. Of course, according to other embodiments of the spring, this piece can be semicircular or the like.

Nach einer zweiten Biegung verläuft der erste Federschenkel 26 in Richtung des Ankers 28, welcher entlang der Achse A in Längsrichtung im Spulenkörper 16 verschiebbar ist. Der Anker 28 weist im Bereich des Ankerkopfs 30 eine tief eingeschnittene Ringnut 32 auf. Das Ende des ersten Federschenkels 26 ist in dieser Ringnut um den Hals des Ankers 28 geschlungen.After a second bend, the first spring leg 26 runs in the direction of the armature 28, which can be displaced in the longitudinal direction in the coil former 16 along the axis A. The armature 28 has a deeply cut annular groove 32 in the region of the armature head 30. The end of the first spring leg 26 is looped around the neck of the armature 28 in this annular groove.

Wird der Anker 28 bei starkem Ueberstrom oder einem Kurzschluss in den Spulenkörper 16 gezogen, wird auch der erste Federschenkel 26 mitgenommen. Dadurch dreht sich ebenfalls die Ankerfeder 22, in Richtung L vom ersten Federschenkel 26 weg abnehmend. Der in der Projektion U-förmig gebogene erste Federschenkel 26 wirkt als Hebelarm und überträgt, mit seinem zur Längsachse L der Ankerfeder 22 parallel verlaufenden Stück 27, die Ankerbewegung ohne weitere Hilfsmittel auf einen Auslöseschieber 44.If the armature 28 is pulled into the coil body 16 in the event of a strong overcurrent or a short circuit, the first spring leg 26 is also carried along. As a result, the armature spring 22 also rotates, decreasing in the direction L away from the first spring leg 26. The first spring leg 26, which is bent in a U-shape in the projection, acts as a lever arm and, with its piece 27 running parallel to the longitudinal axis L of the armature spring 22, transmits the armature movement to a trigger slide 44 without any further aids.

Am zweiten Federschenkel 36 ist die Ankerfeder 28 gegen ein Verdrehen gesichert. Dieser ebenfalls tangential von der Feder weglaufende zweite Federschenkel 36 ist in Richtung der Federachse L umgebogen, von der Ankerfeder 22 wegweisend.The armature spring 28 is secured against rotation on the second spring leg 36. This second spring leg 36, which also runs tangentially from the spring, is bent in the direction of the spring axis L, pointing away from the armature spring 22.

Das freie Ende des zweiten Federschenkels 36 liegt auf einem an das Lagergehäuse 21 angeformten Steg 38 auf. Dieser Steg 38 ist, in Richtung L von rechts betrachtet, kreissegmentförmig ausgebildet und hat Nuten 40 zum Einrasten des freien Endes des zweiten Federschenkels 36.The free end of the second spring leg 36 rests on a web 38 integrally formed on the bearing housing 21. This web 38, viewed in the direction L from the right, is in the form of a segment of a circle and has grooves 40 for latching the free end of the second spring leg 36.

Mit dieser Lösung werden zwei Vorteile erreicht:

  • Der zweite Federschenkel 36 sichert die Ankerfeder 22 vor einem Verdrehen.
  • Je nach der gewählten Nut 40 des Stegs 38 zum Einrasten des freien Endes des zweiten Federschenkels 36 ist die Ankerfeder 22 mehr oder weniger vorgespannt. Dadurch kann die den Anker 28 zurückhaltende Federkraft eingestellt werden, je nach gewünschtem Ansprechwert.
Two advantages are achieved with this solution:
  • The second spring leg 36 secures the armature spring 22 against twisting.
  • Depending on the selected groove 40 of the web 38 for engaging the free end of the second spring leg 36, the armature spring 22 is more or less biased. As a result, the spring force retaining the armature 28 can be adjusted, depending on the desired response value.

Fig. 1 zeigt den Anker 28 in vom Kern 14 im Spulenkörper 16 entfernter Lage, der Ruhelage R. Fliesst ein Ueberstrom durch die Spule 18 und erzeugt ein Magnetfeld, so wird der Anker 28 bis auf den Kern 14 in den Spulenkörper gezogen, wobei die Ankerfeder 22 die Bewegung auf den Auslöseschieber 44 (Fig. 2) überträgt. Ein nicht dargestellter Schlagstift aus Kunststoff wird durch den Anker 28 betätigt. Nach dem Trennen der elektrischen Kontakte des Installationseinbauschalters wird das Magnetfeld sofort abgebaut, der Anker 28 wird von der Ankerfeder 22 in die Ruhelage R zurückgezogen. Ein Anschlag 42 des Lagergehäuses 21 fixiert den durch Federkraft gehaltenen Anker 28 in der Ruhelage, was mit einem R beim Ankerkopf 30 angedeutet ist. Der zwischen dem Ankerkopf 30 und dem Anschlag 42 wegen der Uebersichtlichkeit gezeichnete Abstand besteht in Wirklichkeit nicht.Fig. 1 shows the armature 28 in the position distant from the core 14 in the coil body 16, the rest position R. If an overcurrent flows through the coil 18 and generates a magnetic field, the armature 28 is pulled up to the core 14 into the coil body, the Armature spring 22 transmits the movement to the trigger slide 44 (FIG. 2). A plastic striker pin, not shown, is actuated by the armature 28. After the electrical contacts of the installation built-in switch have been disconnected, the magnetic field is immediately removed, the armature 28 is pulled back into the rest position R by the armature spring 22. A stop 42 of the bearing housing 21 fixes the armature 28 held by spring force in the rest position, which is indicated by an R on the armature head 30. The distance drawn between the anchor head 30 and the stop 42 because of the clarity does not really exist.

Fig. 2 zeigt einen Teil des sich über drei im selben Gehäuse angeordnete elektromagnetische Auslöseelemente erstrekkenden Auslöseschiebers 44. Die Ankerfeder 22 des gezeigten Auslöseelements ist sichtbar, deren erster Federschenkel 26 liegt auf dem Auslöseschieber 44 auf. Dieser wirkt bei einer Bewegung des in Ruhelage R dargestellten Ankers 28 auf eine nicht dargestellte Auslöseklinke des Schaltschlosses ein.2 shows part of the trigger slide 44, which extends over three electromagnetic trigger elements arranged in the same housing. The armature spring 22 of the trigger element shown is visible, the first spring leg 26 of which rests on the trigger slide 44. This acts when the armature 28 shown in the rest position R moves a release pawl of the switch lock, not shown.

Der in Blickrichtung hinten angeordnete zweite Federschenkel 36 ist vom Betrachter wegweisend umgebogen und rastet mit dem freien Ende in einer Nut 40 des Stegs 38 ein.The second spring leg 36, which is arranged at the rear in the viewing direction, is bent away from the viewer and engages with the free end in a groove 40 of the web 38.

Die in Fig. 3 dargestellte Ankerfeder 22 entspricht im wesentlichen derjenigen von Fig. 1 und hat einen entsprechend ausgebildeten ersten Federschenkel 26 mit einem zur Längsachse L der Ankerfeder 22 parallel verlaufenden Stück 27 der Länge a und einen von der Feder wegweisend umgebogenen zweiten Federschenkel 36.The armature spring 22 shown in FIG. 3 corresponds essentially to that of FIG. 1 and has a correspondingly designed first spring leg 26 with a piece 27 of length a running parallel to the longitudinal axis L of the armature spring 22 and a second spring leg 36 bent away from the spring pointing away.

Claims (10)

  1. Process for the transmission of force in the electromagnetic trip system of an installation switch for electrical low voltage distribution networks which cuts out if an overcurrent occurs, in particular of a protective motor switch, the trip system acting on a switch lock essentially consisting of a yoke (12), a core (14), a coil (18), a coil body (16), a mobile armature (28) and an armature spring (22) which retains the armature when the high overcurrent is interrupted
    characterised in that
    the movement of the armature (28) is transmitted directly to a trip slide (44), which operates the switch lock, via a first spring flange (26) of the armature spring (22) in the form of a helical spring, the other end of which is fitted so that it cannot rotate by means of a second spring flange (36).
  2. Process in accordance with claim 1, characterised in that the armature spring (22) is pretensioned via the second spring flange (36) which is not used for the transmission of force.
  3. Process in accordance with claim 2, characterised in that the armature spring (22) is pretensioned by engaging the bent second spring flange (36) in different positions.
  4. Device for carrying out the process in accordance with one of claims 1 to 3, characterised in that the first spring flange (26) of the armature spring (22) connected to the armature (28) has means for the direct transmission of the armature movement, at least in the direction of the core (14) of the electromagnetic trip system, and a trip slide (44), which operates the switch lock, has means for taking up the movement transferred by the first spring flange (26).
  5. Device in accordance with claim 4, characterised in that the armature spring (22) has a bearing housing (21), moulded onto the coil body (16) as an integral part which can be closed when the spring has been fitted.
  6. Device in accordance with claim 5, characterised in that the armature spring (22) is disposed on a mandril and/or in a recess (24) of the bearing housing (21).
  7. Device in accordance with one of the claims 4 - 6, characterised in that the first spring flange (26) connected to the armature (28) is preferably first taken away from the armature spring (22) tangentially and then curved in the direction of armature (28) to form a lever arm.
  8. Device in accordance with claim 7, characterised in that before being bent in the direction of armature (28), the first spring flange (26) runs parallel to the spring axis (L), preferably over a section (27) of 2 mm - 6 mm.
  9. Device in accordance with claim 8, characterised in that the part of the first spring flange (26) running parallel to the spring axis (L) is disposed in a groove of the trip slide (44) or stands on a drive cam or shoulder of trip slide (44) at least in the trip direction.
  10. Device in accordance with one of claims 4-9, characterised in that the second spring flange (36) for pretensioning the armature spring (22) is first taken away from the spring, preferably tangentially, and is then bent in the direction of the spring axis (L), away from the spring, and engages in a groove (40) of a correspondingly moulded web (38) of the bearing housing (21).
EP89810164A 1988-03-15 1989-03-02 Power transmission in an electromagnetic trip device of a fitted circuit breaker Expired - Lifetime EP0333650B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810164T ATE89949T1 (en) 1988-03-15 1989-03-02 POWER TRANSMISSION IN THE ELECTROMAGNETIC TRIP SYSTEM OF AN INSTALLATION BUILT-IN SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH976/88 1988-03-15
CH97688 1988-03-15

Publications (2)

Publication Number Publication Date
EP0333650A1 EP0333650A1 (en) 1989-09-20
EP0333650B1 true EP0333650B1 (en) 1993-05-26

Family

ID=4199582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810164A Expired - Lifetime EP0333650B1 (en) 1988-03-15 1989-03-02 Power transmission in an electromagnetic trip device of a fitted circuit breaker

Country Status (4)

Country Link
EP (1) EP0333650B1 (en)
AT (1) ATE89949T1 (en)
DE (1) DE58904454D1 (en)
ES (1) ES2043090T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952180A1 (en) * 1999-10-29 2001-05-03 Moeller Gmbh Electrical protection switching device
DE19952178A1 (en) * 1999-10-29 2001-05-03 Moeller Gmbh Electrical protection switching device
DE19952186A1 (en) * 1999-10-29 2001-05-03 Moeller Gmbh Electrical protection switching device
DK1130613T3 (en) * 2000-02-11 2004-01-19 Bticino Spa Automatic switch with actuating electromagnet for short circuits
DE102011080680A1 (en) * 2011-08-09 2013-02-14 Siemens Aktiengesellschaft Armature spring for magnetic system of circuit breaker for e.g. meter cabinet, has spacer portion that is arranged between working arm and holding leg to transmit spring force to working arm and holding leg
CN102610453A (en) * 2012-03-16 2012-07-25 任登华 Series cut-out switches

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234344A (en) * 1963-01-18 1966-02-08 Heinemann Electric Co Electromagnetic circuit breaker having a solenoid with a hydraulic time delay means
CH577748A5 (en) * 1973-07-31 1976-07-15 Ellenberger & Poensgen
AT343207B (en) * 1976-08-23 1978-05-10 Felten & Guilleaume Ag Oester ADJUSTMENT DEVICE FOR QUICK RELEASE OF CIRCUIT BREAKERS
FR2496976B1 (en) * 1980-12-19 1985-10-18 Etude Realisa Disjoncteurs DELAYED RESPONSE FAST ELECTROMAGNETIC TRIGGER FOR ELECTRICAL SWITCHING APPARATUS

Also Published As

Publication number Publication date
ES2043090T3 (en) 1993-12-16
ATE89949T1 (en) 1993-06-15
EP0333650A1 (en) 1989-09-20
DE58904454D1 (en) 1993-07-01

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