EP2044605B1 - Adjustable short-circuit release - Google Patents

Adjustable short-circuit release Download PDF

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Publication number
EP2044605B1
EP2044605B1 EP07787344A EP07787344A EP2044605B1 EP 2044605 B1 EP2044605 B1 EP 2044605B1 EP 07787344 A EP07787344 A EP 07787344A EP 07787344 A EP07787344 A EP 07787344A EP 2044605 B1 EP2044605 B1 EP 2044605B1
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EP
European Patent Office
Prior art keywords
pole
armature
short
overcurrent release
circuit release
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.)
Not-in-force
Application number
EP07787344A
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German (de)
French (fr)
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EP2044605A1 (en
Inventor
Rudolf GRÄFENHAHN
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Siemens AG
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Siemens AG
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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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism
    • 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
    • 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
    • H01H71/7409—Interchangeable elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable

Definitions

  • the invention relates to an overcurrent release with a yoke, with a coil winding, with a pole, with an armature and with a retaining spring for biasing the armature, wherein there is an air gap between the pole and the armature.
  • a generic device is used in instantaneous overcurrent releases, as they are known to be used in circuit breakers for switching and protecting motors and other consumers.
  • These instantaneous overcurrent releases are designed as electromagnetic triggers that essentially comprise a coil winding, a bobbin, an armature, a pole, a plunger, a retaining spring, and a yoke.
  • the armature pulls at a certain rated current of the circuit breaker, e.g. at thirteen times the rated current for motor protection or at 19 times the rated current for transformer protection.
  • the armature movement acts on a switch lock and on a movable contact piece to open the contacts.
  • the operating current must fluctuate a maximum of ⁇ 20%.
  • the difficulty is because of the required larger support cross-sections, smaller numbers of turns, greater tolerances of the coil and the winding wire and the associated inhomogeneous magnetic magnetic field, the coil winding to position the air gap between the armature and the pole sufficiently accurate so that the response limits according to the standard.
  • the problem there is the problem of keeping fluctuations in the armature pole distance sufficiently small due to the part tolerances and fluctuations in the restraining force because of the spring tolerances.
  • the contact current and the breaking force of the switching mechanism are based on the maximum current flowing. For The design means that correspondingly strong springs are installed and all components must bear the forces acting.
  • CH 264437 A is a magnetic quick release disclosed for overcurrent switch, in which by means of a provided for the support of the armature spring screw, which is located in a threaded bore of the magnetic core, the release force can be changed in a certain range.
  • WO 01/65585 A1 discloses an overcurrent dissolver according to the preamble of claim 1.
  • Siemens SIRIUS 3RV S2 size circuit breakers from Siemens also use a torsion spring outside the bobbin as a retaining spring that can be replaced or that can be relocated using a grid.
  • torsion springs can only be produced with relatively large force tolerances and have unfavorable friction due to torsion spring mounting.
  • the invention has for its object to provide an overcurrent release with low force tolerances for the retaining spring whose response value can be adjusted later, as well as a circuit breaker with such an overcurrent release.
  • Compression springs can be manufactured with smaller force tolerances than torsion springs, which also advantageously within the allowable tolerance to IEC60947 of ⁇ 20% of the response current to e.g. 13 times the rated current minus 20% can be reduced.
  • compression springs have no friction between the turns and no as unfavorable friction as a torsion spring bearing.
  • a slight subsequent shift of the response value of the overcurrent release on the finished overcurrent release or finished device is possible by the interchangeability of the compression spring.
  • the compression spring can be mounted from a first side of the overcurrent release and disassembled from a side opposite the first side.
  • the coil winding is arranged on a bobbin and the yoke is formed in two pieces.
  • the bobbin is made of plastic and has a contour for fixing the pole so that it can not come loose.
  • the contour thus serves as protection against loosening or unscrewing of the pole at e.g. Shocks.
  • the pole has a shank and a screw head and can be fastened to the connection piece in such a way that the screw head in the firmly turned state is flush with the connection piece.
  • Fig. 1 shows the essential components of an overcurrent release, which is used for circuit breakers for switching and protecting motors and other consumers, in an exploded view.
  • the overcurrent release is composed of a coil winding 1 on a bobbin 6, a pole 2, an armature 3, a compression spring 5 and a connection 7.
  • the bobbin 6 is formed integrally with a support member 9.
  • a substantially Z-shaped yoke is made in one piece and corresponds to the connecting piece 7.
  • a combination screw 8 is used inter alia for positioning the two parts 7 and 9 to each other.
  • the pressure spring 5 is in the assembled state between the pole 2 and the armature 3 in the interior of the bobbin 6.
  • the armature 3 has on the pressure spring 5 side facing the inner diameter of the compression spring 5 corresponding survey 4, which in the assembled state of the Compression spring 5 is enclosed.
  • the pole 2 can be fastened to the connecting piece 7 by means of a thread, so that the compression spring 5 can be easily exchanged in the finished device by unscrewing the pole 2, whereby the response value of the overcurrent release can be varied.
  • the pole-side hole of the bobbin 6 is large enough for disassembly the compression spring 5 to allow the pressure spring exchange.
  • the pole-side hole of the bobbin 6 has next to a special contour for fixing the pole 2, which serves as (additional) protection, for example against unscrewing of the pole 2 in shock, so that the pole 2 can not solve.
  • Fig. 2 shows the overcurrent release Fig. 1 in the assembled state, wherein the coil winding 1 is arranged on the bobbin 6.
  • the armature 3, the pole 2 and the compression spring 5 are located in the cavity of the cylindrical bobbin. 6
  • the invention relates to an overcurrent release with a yoke, with a coil winding, with a pole, with an armature and with a retaining spring for biasing the armature, wherein there is an air gap between the pole and the armature.
  • the invention has for its object to provide an overcurrent release with low force tolerances for the retaining spring whose response value can be adjusted later, as well as a circuit breaker with such an overcurrent release. This object is achieved with an overcurrent release of the type mentioned above in that the retaining spring is designed as provided between the pole and the armature compression spring and that the overcurrent release is designed such that the compression spring is replaceable.
  • Compression springs can be manufactured with smaller force tolerances than torsion springs, which also advantageously within the allowable tolerance to IEC60947 of ⁇ 20% of the response current to e.g. 13 times the rated current minus 20% can be reduced.
  • compression springs have no friction between the turns and no as unfavorable friction as a torsion spring bearing.
  • a slight subsequent shift of the response value of the overcurrent release on the finished overcurrent release or finished device is possible by the interchangeability of the compression spring.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

The invention relates to an overcurrent release with a yoke, with a coil winding, with a pole, with an armature and with a restraining spring for pre-stressing the armature, wherein an air gap exists between the pole and the armature. The invention is based on the object of specifying an overcurrent release with low force tolerances for the restraining spring, whose response value can be adjusted retrospectively and a circuit breaker with such an overcurrent release. This object is achieved in the case of an overcurrent release of the type mentioned at the outset by virtue of the fact that the restraining spring is in the form of a compression spring provided between the pole and the armature and that the overcurrent release is designed such that the compression spring is replaceable. Compression springs can be produced with lower force tolerances than torsion springs, as a result of which, also advantageously within the permissible tolerance in accordance with IEC60947 of ±20%, the response current can be reduced to, for example, 13 times the rated current minus 20%. Furthermore, compression springs do not have any friction between the turns and do not have as unfavourable friction as a torsion spring mounting arrangement. In addition, the replaceablity of the compression springs makes it possible to shift the response value of the overcurrent release on the finished overcurrent release or finished device retrospectively and easily.

Description

Die Erfindung betrifft einen Überstromauslöser mit einem Joch, mit einer Spulenwicklung, mit einem Pol, mit einem Anker und mit einer Rückhaltefeder zum Vorspannen des Ankers, wobei zwischen dem Pol und dem Anker ein Luftspalt besteht.The invention relates to an overcurrent release with a yoke, with a coil winding, with a pole, with an armature and with a retaining spring for biasing the armature, wherein there is an air gap between the pole and the armature.

Eine gattungsgemäße Einrichtung wird bei unverzögerten Überstromauslösern verwendet, wie sie bekannterweise in Leistungsschaltern zum Schalten und Schützen von Motoren und anderen Verbrauchern eingesetzt werden. Diese unverzögerten Überstromauslöser sind als elektromagnetische Auslöser konzipiert, die im Wesentlichen eine Spulenwicklung, einen Spulenkörper, einen Anker, einen Pol, einen Stößel, eine Rückhaltefeder und ein Joch umfassen. Der Anker zieht bei einem bestimmten Bemessungsstrom des Leistungsschalters, z.B. beim dreizehnfachen Nennstrom bei Motorschutz oder beim 19-fachen Nennstrom beim Trafoschutz an. Die Ankerbewegung wirkt dabei auf ein Schaltschloss und auf ein bewegliches Schaltstück, um die Kontakte zu öffnen. Gemäß Norm (IEC60947) darf dabei der Ansprechstrom maximal ±20 % schwanken.A generic device is used in instantaneous overcurrent releases, as they are known to be used in circuit breakers for switching and protecting motors and other consumers. These instantaneous overcurrent releases are designed as electromagnetic triggers that essentially comprise a coil winding, a bobbin, an armature, a pole, a plunger, a retaining spring, and a yoke. The armature pulls at a certain rated current of the circuit breaker, e.g. at thirteen times the rated current for motor protection or at 19 times the rated current for transformer protection. The armature movement acts on a switch lock and on a movable contact piece to open the contacts. According to standard (IEC60947), the operating current must fluctuate a maximum of ± 20%.

Bei größeren Einstellbereichen besteht die Schwierigkeit darin, wegen der benötigten größeren Tragquerschnitte, geringeren Windungszahlen, größeren Toleranzen der Spule und des Wickeldrahtes und dem damit verbundenen inhomogeneren magnetischen Magnetfeld, die Spulenwicklung zum Luftspalt zwischen dem Anker und dem Pol hinreichend genau zu positionieren, damit die Ansprechgrenzen gemäß Norm eingehalten werden können. Außerdem besteht das Problem, Schwankungen des Anker-Pol-Abstandes durch die Teiletoleranzen und Schwankungen der Rückhaltekraft wegen der Federtoleranzen hinreichend klein zu halten. Bei der Dimensionierung einer Leistungsschalterbaugröße wird bei der Kontaktlast und der Ausschaltkraft des Schaltschlosses vom maximal fließenden Strom ausgegangen. Für die Konstruktion bedeutet dies, dass entsprechend starke Federn eingebaut werden und alle Bauteile die wirkenden Kräfte tragen müssen.For larger adjustment ranges, the difficulty is because of the required larger support cross-sections, smaller numbers of turns, greater tolerances of the coil and the winding wire and the associated inhomogeneous magnetic magnetic field, the coil winding to position the air gap between the armature and the pole sufficiently accurate so that the response limits according to the standard. In addition, there is the problem of keeping fluctuations in the armature pole distance sufficiently small due to the part tolerances and fluctuations in the restraining force because of the spring tolerances. When dimensioning a circuit breaker size, the contact current and the breaking force of the switching mechanism are based on the maximum current flowing. For The design means that correspondingly strong springs are installed and all components must bear the forces acting.

Aus EP 1 105 900 B1 ist ein Überstromauslöser bekannt, bei dem die Spulenwicklung in axialer Richtung mittels eines Justageringes zwischen der Spulenwicklung und dem Joch positioniert werden kann.Out EP 1 105 900 B1 an overcurrent release is known in which the coil winding can be positioned in the axial direction by means of a Justageringes between the coil winding and the yoke.

In der CH 264437 A ist ein magnetischer Schnellauslöser für Überstromschalter offenbart, bei dem mittels einer für die Abstützung der Ankerfeder vorgesehenen Stellschraube, die sich in einer Gewindebohrung des Magnetkerns befindet, die Auslösekraft in einem gewissen Bereich verändert werden kann.In the CH 264437 A is a magnetic quick release disclosed for overcurrent switch, in which by means of a provided for the support of the armature spring screw, which is located in a threaded bore of the magnetic core, the release force can be changed in a certain range.

WO 01/65585 A1 offenbart einen Überstromanslöser gemäß dem Oberbegriff des Anspruchs 1. WO 01/65585 A1 discloses an overcurrent dissolver according to the preamble of claim 1.

Bekannt ist z.B. aus den Leistungsschaltern SIRIUS 3RV der Baugröße S2 von Siemens auch die Verwendung einer außerhalb des Spulenkörpers liegenden Drehfeder als Rückhaltefeder, die ausgetauscht werden kann oder die mit Hilfe eines Rasters umgehängt werden kann. Drehfedern können allerdings nur mit relativ großen Kräftetoleranzen hergestellt werden und weisen eine ungünstige Reibung durch die Drehfeder-Lagerung auf.It is known e.g. The Siemens SIRIUS 3RV S2 size circuit breakers from Siemens also use a torsion spring outside the bobbin as a retaining spring that can be replaced or that can be relocated using a grid. However, torsion springs can only be produced with relatively large force tolerances and have unfavorable friction due to torsion spring mounting.

Der Erfindung liegt die Aufgabe zugrunde, einen Überstromauslöser mit geringen Kräftetoleranzen für die Rückhaltefeder, dessen Ansprechwert nachträglich angepasst werden kann, sowie einen Leistungsschalter mit einem derartigen Überstromauslöser anzugeben.The invention has for its object to provide an overcurrent release with low force tolerances for the retaining spring whose response value can be adjusted later, as well as a circuit breaker with such an overcurrent release.

Diese Aufgabe wird bei einem Überstromauslöser der eingangs genannten Art dadurch gelöst, dass die Rückhaltefeder als zwischen dem Pol und dem Anker vorgesehene Druckfeder ausgebildet ist und dass der Überstromauslöser derart ausgeführt ist, dass die Druckfeder austauschbar ist, wobei der Pol zum Austausch der Druckfeder mittels eines Gewindes oder eines Bajonettverschlusses am Anschlussstück befestigbar ist.This object is achieved in an overcurrent release of the type mentioned above in that the retaining spring is designed as provided between the pole and the armature compression spring and that the overcurrent release is designed such that the pressure spring is replaceable, wherein the pole for replacing the compression spring by means of a Thread or a bayonet lock on the connection piece can be fastened.

Druckfedern können mit kleineren Kräftetoleranzen hergestellt werden als Drehfedern, wodurch auch vorteilhafterweise innerhalb der zulässigen Toleranz nach IEC60947 von ±20 % der Ansprechstrom auf z.B. den 13-fachen Nennstrom minus 20 % verkleinert werden kann. Darüber hinaus weisen Druckfedern keine Reibung zwischen den Windungen und keine so ungünstige Reibung wie eine Drehfeder-Lagerung auf. Zudem ist durch die Austauschbarkeit der Druckfeder eine leichte nachträgliche Verschiebung des Ansprechwertes des Überstromauslösers am fertigen Überstromauslöser bzw. fertigem Gerät möglich.Compression springs can be manufactured with smaller force tolerances than torsion springs, which also advantageously within the allowable tolerance to IEC60947 of ± 20% of the response current to e.g. 13 times the rated current minus 20% can be reduced. In addition, compression springs have no friction between the turns and no as unfavorable friction as a torsion spring bearing. In addition, a slight subsequent shift of the response value of the overcurrent release on the finished overcurrent release or finished device is possible by the interchangeability of the compression spring.

Dazu ist in einer vorteilhaften Ausführungsform die Druckfeder von einer ersten Seite des Überstromauslösers her montierbar und von einer der ersten Seite gegenüber liegenden Seite demontierbar.For this purpose, in an advantageous embodiment, the compression spring can be mounted from a first side of the overcurrent release and disassembled from a side opposite the first side.

In weiteren vorteilhaften Ausführungsformen weist der Pol und/oder der Anker auf der der Druckfeder zugewandten Seite eine dem Innendurchmesser der Druckfeder entsprechende Erhebung auf, die der Lagerung der Druckfeder dient.In further advantageous embodiments, the pole and / or the armature on the side facing the compression spring on a corresponding to the inner diameter of the compression spring survey, which serves to support the compression spring.

In weiteren vorteilhaften Ausführungsformen ist die Spulenwicklung auf einem Spulenkörper angeordnet und das Joch zweistückig ausgebildet.In further advantageous embodiments, the coil winding is arranged on a bobbin and the yoke is formed in two pieces.

In weiteren vorteilhaften Ausführungsformen ist der Spulenkörper aus Kunststoff ausgebildet und weist eine Kontur zur Fixierung des Pols auf, damit sich dieser nicht lösen kann. Die Kontur dient damit als Schutz gegen ein Lösen oder Herausdrehen des Pols bei z.B. Erschütterungen.In further advantageous embodiments, the bobbin is made of plastic and has a contour for fixing the pole so that it can not come loose. The contour thus serves as protection against loosening or unscrewing of the pole at e.g. Shocks.

In weiteren vorteilhaften Ausführungsformen weist der Pol einen Schaft und einen Schraubkopf auf und ist derart am Anschlussstück befestigbar, dass der Schraubkopf im festgedrehten Zustand bündig an das Anschlussstück anschließt. Hierdurch ist neben einer einfachen Handhabung, beispielsweise durch einfaches Schrauben, beim Austauschen der Druckfeder auch gewährleistet, dass keine Schwankungen des Anker-Pol-Abstandes durch den Austausch auftreten, da der Pol durch den bündigen Abschluss immer bis zur gleichen Tiefe in den Spulenkörper hineinragt.In further advantageous embodiments, the pole has a shank and a screw head and can be fastened to the connection piece in such a way that the screw head in the firmly turned state is flush with the connection piece. This is next to a simple handling, for example by simply screwing, when replacing the compression spring also ensures that no fluctuations in the armature-pole distance occur through the exchange, since the pole protrudes through the flush termination always to the same depth in the bobbin.

Im Folgenden wird die Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher beschrieben und erläutert. Es zeigen:

FIG 1
eine Explosionsdarstellung eines Überstromauslösers für einen Leistungsschalter und
FIG 2
den Überstromauslöser aus Fig 1 im zusammengebauten Zustand.
In the following the invention will be described and explained in more detail with reference to the embodiments illustrated in the figures. Show it:
FIG. 1
an exploded view of an overcurrent release for a circuit breaker and
FIG. 2
the overcurrent release off Fig. 1 in the assembled state.

Fig 1 zeigt die wesentlichen Komponenten eines Überstromauslösers, der für Leistungsschalter zum Schalten und Schützen von Motoren und anderen Verbrauchern eingesetzt wird, in einer Explosionsdarstellung. Der Überstromauslöser ist dabei zusammengesetzt aus einer Spulenwicklung 1 auf einem Spulenkörper 6, einem Pol 2, einem Anker 3, einer Druckfeder 5 und einem Anschluss 7. Der Spulenkörper 6 ist mit einem Trägerelement 9 einstückig ausgeführt. Ein im Wesentlichen Z-förmiges Joch ist einstückig ausgeführt und entspricht dem Anschlussstück 7. Eine Kombischraube 8 dient u.a. zur Positionierung der beiden Teile 7 und 9 zueinander. Die Druckfeder 5 befindet sich im zusammengebauten Zustand zwischen dem Pol 2 und dem Anker 3 im Inneren des Spulenkörpers 6. Der Anker 3 weist auf der der Druckfeder 5 zugewandten Seite eine dem Innendurchmesser der Druckfeder 5 entsprechende Erhebung 4 auf, die im zusammengebauten Zustand von der Druckfeder 5 umschlossen wird. Der Pol 2 ist auf das Anschlussstück 7 mittels eines Gewindes befestigbar, so dass die Druckfeder 5 auch im fertigen Gerät leicht durch Abschrauben des Pols 2 ausgetauscht werden kann, wodurch der Ansprechwert des Überstromauslösers variiert werden kann. Zu diesem Zweck ist das polseitige Loch des Spulenkörpers 6 groß genug für eine Demontage der Druckfeder 5, um den Druckfederaustausch zu ermöglichen. Das polseitige Loch des Spulenkörpers 6 weist daneben eine spezielle Kontur zur Fixierung des Pols 2 auf, die als (zusätzlicher) Schutz z.B. gegen ein Herausdrehen des Pols 2 bei Erschütterungen dient, so dass sich der Pol 2 nicht lösen kann. Fig. 1 shows the essential components of an overcurrent release, which is used for circuit breakers for switching and protecting motors and other consumers, in an exploded view. The overcurrent release is composed of a coil winding 1 on a bobbin 6, a pole 2, an armature 3, a compression spring 5 and a connection 7. The bobbin 6 is formed integrally with a support member 9. A substantially Z-shaped yoke is made in one piece and corresponds to the connecting piece 7. A combination screw 8 is used inter alia for positioning the two parts 7 and 9 to each other. The pressure spring 5 is in the assembled state between the pole 2 and the armature 3 in the interior of the bobbin 6. The armature 3 has on the pressure spring 5 side facing the inner diameter of the compression spring 5 corresponding survey 4, which in the assembled state of the Compression spring 5 is enclosed. The pole 2 can be fastened to the connecting piece 7 by means of a thread, so that the compression spring 5 can be easily exchanged in the finished device by unscrewing the pole 2, whereby the response value of the overcurrent release can be varied. For this purpose, the pole-side hole of the bobbin 6 is large enough for disassembly the compression spring 5 to allow the pressure spring exchange. The pole-side hole of the bobbin 6 has next to a special contour for fixing the pole 2, which serves as (additional) protection, for example against unscrewing of the pole 2 in shock, so that the pole 2 can not solve.

Fig 2 zeigt den Überstromauslöser aus Fig 1 im zusammengebauten Zustand, wobei die Spulenwicklung 1 auf dem Spulenkörper 6 angeordnet ist. Der Anker 3, der Pol 2 sowie die Druckfeder 5 befinden sich im Hohlraum des zylinderförmigen Spulenkörpers 6. Fig. 2 shows the overcurrent release Fig. 1 in the assembled state, wherein the coil winding 1 is arranged on the bobbin 6. The armature 3, the pole 2 and the compression spring 5 are located in the cavity of the cylindrical bobbin. 6

Zusammenfassend betrifft die Erfindung einen Überstromauslöser mit einem Joch, mit einer Spulenwicklung, mit einem Pol, mit einem Anker und mit einer Rückhaltefeder zum Vorspannen des Ankers, wobei zwischen dem Pol und dem Anker ein Luftspalt besteht. Der Erfindung liegt die Aufgabe zugrunde, einen Überstromauslöser mit geringen Kräftetoleranzen für die Rückhaltefeder, dessen Ansprechwert nachträglich angepasst werden kann, sowie einen Leistungsschalter mit einem derartigen Überstromauslöser anzugeben. Diese Aufgabe wird bei einem Überstromauslöser der eingangs genannten Art dadurch gelöst, dass die Rückhaltefeder als zwischen dem Pol und dem Anker vorgesehene Druckfeder ausgebildet ist und dass der Überstromauslöser derart ausgeführt ist, dass die Druckfeder austauschbar ist. Druckfedern können mit kleineren Kräftetoleranzen hergestellt werden als Drehfedern, wodurch auch vorteilhafterweise innerhalb der zulässigen Toleranz nach IEC60947 von ±20 % der Ansprechstrom auf z.B. den 13-fachen Nennstrom minus 20 % verkleinert werden kann. Darüber hinaus weisen Druckfedern keine Reibung zwischen den Windungen und keine so ungünstige Reibung wie eine Drehfeder-Lagerung auf. Zudem ist durch die Austauschbarkeit der Druckfeder eine leichte nachträgliche Verschiebung des Ansprechwertes des Überstromauslösers am fertigen Überstromauslöser bzw. fertigem Gerät möglich.In summary, the invention relates to an overcurrent release with a yoke, with a coil winding, with a pole, with an armature and with a retaining spring for biasing the armature, wherein there is an air gap between the pole and the armature. The invention has for its object to provide an overcurrent release with low force tolerances for the retaining spring whose response value can be adjusted later, as well as a circuit breaker with such an overcurrent release. This object is achieved with an overcurrent release of the type mentioned above in that the retaining spring is designed as provided between the pole and the armature compression spring and that the overcurrent release is designed such that the compression spring is replaceable. Compression springs can be manufactured with smaller force tolerances than torsion springs, which also advantageously within the allowable tolerance to IEC60947 of ± 20% of the response current to e.g. 13 times the rated current minus 20% can be reduced. In addition, compression springs have no friction between the turns and no as unfavorable friction as a torsion spring bearing. In addition, a slight subsequent shift of the response value of the overcurrent release on the finished overcurrent release or finished device is possible by the interchangeability of the compression spring.

Claims (11)

  1. Short-circuit release with a yoke, with a coil winding (1), with a pole (2), with an armature (3) and with a retaining spring (5) for pre-tensioning the armature (3), with there being an air gap between the armature (3) and the pole (2), whereby
    the retaining spring (5) is embodied as a compression spring (2) provided between the pole (2) and the armature (3), characterised in that the short-circuit release is embodied such that the compression spring (5) is exchangeable whereby, for exchanging the compression spring, the pole (2) is able to be attached by means of a thread or a bayonet connection to the connecting piece (7).
  2. Short-circuit release according to claim 1,
    with the compression spring (5) able to be installed from a first side of the short-circuit release and also able to be removed from a side opposite the first side.
  3. Short-circuit release according to claim 1 or 2,
    with the armature (3), on its side facing towards the compression spring (5), having a raised section (4) corresponding to the internal diameter of the compression spring (5).
  4. Short-circuit release according to one of the previous claims, with the pole (2), on its side facing towards the compression spring (5), having a raised section corresponding to the internal diameter of the compression spring (5).
  5. Short-circuit release according to one of the previous claims, with the coil winding (1) being arranged on a coil body (6).
  6. Short-circuit release according to one of the previous claims, with the yoke being embodied in two pieces.
  7. Short-circuit release according to one of the previous claims,
    with the coil body (6) having a contour for fixing the pole (2).
  8. Short-circuit release according to one of the previous claims, with the coil body (6) being made of plastic.
  9. Short-circuit release according to one of the previous claims, with the pole (2) having a shaft and a screw head.
  10. Short-circuit release according to claim 9,
    with the pole (2) able to be attached to the connection piece (7) such that the screw head, in its tightened state, is flush against the connecting piece (7).
  11. Power switch with at least one short-circuit release according to one of claims 1 to 9.
EP07787344A 2006-07-20 2007-07-11 Adjustable short-circuit release Not-in-force EP2044605B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006033717A DE102006033717B4 (en) 2006-07-20 2006-07-20 Adjustable short-circuit release
PCT/EP2007/057070 WO2008009594A1 (en) 2006-07-20 2007-07-11 Adjustable short-circuit release

Publications (2)

Publication Number Publication Date
EP2044605A1 EP2044605A1 (en) 2009-04-08
EP2044605B1 true EP2044605B1 (en) 2011-03-23

Family

ID=38473005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787344A Not-in-force EP2044605B1 (en) 2006-07-20 2007-07-11 Adjustable short-circuit release

Country Status (7)

Country Link
EP (1) EP2044605B1 (en)
KR (1) KR100994066B1 (en)
CN (1) CN101490784A (en)
AT (1) ATE503264T1 (en)
BR (1) BRPI0711126A2 (en)
DE (2) DE102006033717B4 (en)
WO (1) WO2008009594A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20081092A1 (en) * 2008-06-17 2009-12-18 Gewiss Spa CONTROL DEVICE FOR AUTOMATIC RESET EQUIPMENT
CN103337422B (en) * 2013-06-21 2015-04-22 浙江电器开关有限公司 Tripping device of moulded case circuit breaker
KR101895264B1 (en) * 2018-04-17 2018-09-05 제일전기공업 주식회사 circuit breaker
CN111326954B (en) * 2020-03-03 2020-12-29 山东睿控电气有限公司 Follow current-free ceramic discharge tube with tripping function and surge protector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1007018A (en) * 1948-02-13 1952-04-30 Elektrotechnische Spezialfabri Quick adjustable magnetic trip unit for maximum circuit breakers
US4963848A (en) * 1989-03-31 1990-10-16 Square D Company Non-jamming magnetic trip structure
EP1105900B1 (en) * 1998-08-14 2002-10-30 Siemens Aktiengesellschaft Device with axially positionable coil winding
US6404314B1 (en) * 2000-02-29 2002-06-11 General Electric Company Adjustable trip solenoid

Also Published As

Publication number Publication date
DE502007006788D1 (en) 2011-05-05
EP2044605A1 (en) 2009-04-08
DE102006033717A1 (en) 2008-01-31
KR20080095839A (en) 2008-10-29
WO2008009594A1 (en) 2008-01-24
ATE503264T1 (en) 2011-04-15
BRPI0711126A2 (en) 2011-08-30
KR100994066B1 (en) 2010-11-11
DE102006033717B4 (en) 2009-06-04
CN101490784A (en) 2009-07-22

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