EP2313905B1 - Switching device - Google Patents

Switching device Download PDF

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Publication number
EP2313905B1
EP2313905B1 EP09775551A EP09775551A EP2313905B1 EP 2313905 B1 EP2313905 B1 EP 2313905B1 EP 09775551 A EP09775551 A EP 09775551A EP 09775551 A EP09775551 A EP 09775551A EP 2313905 B1 EP2313905 B1 EP 2313905B1
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EP
European Patent Office
Prior art keywords
yoke
switching device
armature
coil
bent part
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Application number
EP09775551A
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German (de)
French (fr)
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EP2313905A1 (en
Inventor
Rainer Faast
Erich Zach
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Eaton Industries Austria GmbH
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Eaton Industries Austria GmbH
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Priority to PL09775551T priority Critical patent/PL2313905T3/en
Publication of EP2313905A1 publication Critical patent/EP2313905A1/en
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Publication of EP2313905B1 publication Critical patent/EP2313905B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • 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
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices

Definitions

  • the invention relates to a switching device according to the preamble of claim 1.
  • the magnetic release arrangement generally has a current-carrying coil which is enclosed by a yoke. Inside the coil, a movable armature is arranged, which is accelerated by the magnetic field of the current-carrying coil against an armature spring, and causes the occurrence of a short circuit, the separation of a movable electrical contact from a fixed electrical contact.
  • a yoke sleeve pointing towards the armature, which is designed as a turned part in machining production.
  • the DE 25 31 215 A1 describes a magnetic release with an armature, a coil and a yoke, wherein the yoke sleeve is designed as a bent sheet metal part.
  • the DE 198 45 476 A1 discloses a magnet system having a yoke, a coil, a sleeve disposed in a diester coil, and an armature.
  • the object of the invention is to provide a switching device of the type mentioned, in which the manufacturing, energy and raw material costs for its production can be reduced.
  • the Fig. 1 to 5 show a magnetic trip device 1 for a switching device, wherein the magnetic trip device 1 at least one armature 2, a coil 3, a yoke 4 and a yoke sleeve 5, wherein the armature 2 and the yoke sleeve 5 are arranged substantially in alignment, wherein the coil is arranged substantially around the armature 2 and / or the Jochhülse 5 around, wherein the yoke 4 is arranged around the coil 3 around, and wherein the armature 2 is provided for at least indirectly triggering a disconnecting device of the switching device, wherein the yoke sleeve 5 by at least a first bending part 6 is formed.
  • Switching devices according to the invention are preferably designed as a circuit breaker and / or circuit breaker.
  • Switching devices according to the invention have at least two connection terminals 11, an input terminal and an output terminal, for connecting electrical conductors of an electrical line to be protected. It can be provided both switching devices with a single and with a predetermined plurality of electrical switching paths.
  • Switching devices according to the invention have at least one movable electrical switching contact per switching path, which with a further, preferably fixed, electrical switching contact 13 forms a switching contact pair for closing or opening the electrical line to be protected. The at least one movable electrical switching contact is preferably moved by a switching mechanism.
  • Switching devices according to the invention are generally arranged in the current-carrying outer conductors or phases.
  • Switching devices according to the invention have at least one magnetic triggering arrangement 1, which is used to trip the switching device, therefore to disconnect the electrical switching contacts 13, in the case of a short circuit occurring in the electrical line to be protected, therefore a low-resistance connection between an outer conductor or a phase and the neutral conductor , is provided.
  • particularly preferred embodiments of switching devices according to the invention further comprise a thermal trip arrangement, which is preferably formed comprising a bimetallic element, for triggering the switching device due to a slightly increased current flow.
  • the magnetic trip device comprises at least one armature 2, a coil 3, a yoke 4 and a yoke sleeve 5.
  • the coil 3 forms part of the electrical line to be protected within the switching device.
  • a first connection conductor 10 of the coil 3 is connected to a connection terminal 11 of the switching device, and a second connection conductor 12 of the coil 3 is connected to a fixed switching contact 13 of the switching device.
  • the coil 3 is preferably arranged around a winding support 14 made of insulating material, which essentially has the shape of a cylinder, at one end of which a shoulder 18 is formed.
  • the coil 3 is at least partially enclosed by a yoke 4, which is preferably formed as a sheet metal bending / stamping part, and preferably in the form of a substantially rectangular box, and serves to guide the magnetic flux.
  • a yoke 4 which is preferably formed as a sheet metal bending / stamping part, and preferably in the form of a substantially rectangular box, and serves to guide the magnetic flux.
  • the second connecting conductor 12 of the coil 3 is connected to a contact carrier 15, which carries the fixed electrical switching contact 13, the contact carrier 15 preferably also being connected to the yoke 4.
  • anchor 2 Within the winding support 14 is a movable, in particular displaceable along the longitudinal extension, anchor 2 is arranged, and is guided by the winding support 14, wherein the armature 2 is urged by an armature spring 9 toward a rest position, which preferably by the shoulder 18 of Winding support 14 is formed.
  • the coil 3, in particular the number and design of the coil turns, and the spring force of the armature spring 9 are dimensioned such that the armature spring 9 in short-circuit Operating the armature 2 presses against the rest position, in the short circuit case, however, the armature 2 is accelerated by the electromotive force generated by the coil so strong against the spring force of the armature spring that its spring force is overcome and the armature 2 moves away from its rest position, and causes a tripping of the switching device.
  • the armature 2 does not trigger the switch directly, but that the armature 2 drives a plunger 8, which is formed of an insulating material, and the armature 2 indirectly via the plunger 8 the switch triggers.
  • the yoke 4 further comprises at least a first opening 19, which preferably faces the fixed electrical switching contact 13, and through which the plunger 8 acts on a, preferably provided switch lock, and causes the upward movement of the movable switch contact.
  • the armature 2 itself is designed as a hollow cylinder, on whose side facing away from the first opening 19, a stop 20 is formed for the plunger 8.
  • the armature 2 is formed according to the illustrated preferred embodiment as a bent part.
  • the yoke further comprises a second opening 23 through which the winding support is guided.
  • a yoke sleeve 5 in alignment with the armature 2, which is arranged according to the preferred embodiment within the coil 3 and the winding support 14.
  • the yoke sleeve 5 serves to guide or guide the magnetic field lines of the magnetic field generated by the coil 3 toward the armature. It is therefore provided that the yoke 4, the armature 2 and / or the yoke sleeve 5 comprise a ferromagnetic material.
  • the yoke sleeve 5 is arranged in the region of the first opening 19, wherein it is particularly preferred that the yoke sleeve 5 is at least partially disposed in the first opening 19, and preferably with the first opening 19 is pressed or riveted.
  • the yoke sleeve 5 has a passage opening 21 in order to allow it to penetrate through the plunger 8.
  • Fig. 6 shows a yoke sleeve 16 according to the known prior art, which is designed as a rotating part.
  • a particularly preferred magnetic trip device 1 for switching devices according to the invention is particularly well in the Fig. 1 to 5 shown, in Fig. 5 the internal structure is particularly easy to recognize.
  • the yoke sleeve 5 is formed by at least one first bending part 6. Under a bent part is in the broad sense formed by bending, bending and / or rolling of a sheet metal component.
  • the first bent part 6 is formed from a substantially rectangular sheet, which is bent or rolled into a substantially cylindrical body.
  • a yoke sleeve 5 formed in this way has an air gap 17 in its longitudinal direction, which, however, does not cause appreciable magnetic losses, since this air gap 17 is arranged parallel to the magnetic field lines caused by the coil 3.
  • the impairment of the magnetic trip device 1 can be reduced by externally interspersed magnetic fields, since the air gap 17 for magnetic field lines, which are not arranged parallel to this, represents a considerable resistance.
  • FIGS. 7 and 8 show an embodiment of a yoke sleeve 5 according to the invention, which has a first bending part 6 and a second bending part 7, or is formed from such, wherein the first bending part 6 is disposed within the second bending part 7.
  • a yoke sleeve 5 formed in this way has a yoke shoulder 22, which represents an advantageous stop for the automated assembly of the magnetic trip device 1, and thus simplifies the assembly of yoke 4 and yoke sleeve 5.
  • the first bending part 6 is preferably connected to the second bending part 7 according to a preferred embodiment by means of a press fit, whereby additional connection-securing measures can be dispensed with, and a simple and cost-effective production is achieved.
  • the first bending part 6 is positively connected to the second bending part 7.
  • a positive connection can be achieved for example by a knurled outer surface of the first bending part 6, in which a, preferably knurled, inner surface of the second bending part 7 engages.
  • the positive connection can also be achieved by a predetermined plastic deformation of the already assembled first and second bending parts 6, 7. By such a positive connection, a particularly secure hold of the first bending part 6 in the second bending part 7 can be achieved.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)

Abstract

In order to reduce the manufacturing, energy and raw material expenditure for a switching device, comprising a magnetic trigger module (1), wherein the magnetic trigger module (1) includes at least one armature (2), a coil (3), a yoke (4) and a yoke sleeve (5), wherein the armature (2) and the yoke sleeve (5) are arranged substantially aligned, wherein the coil (3) is arranged substantially around the armature (2) and/or the yoke sleeve (5), wherein the yoke (4) is arranged around the coil (3), and wherein the armature (2) is provided for at least indirectly triggering a disconnecting apparatus (16) of the switching device, it is proposed for the production of the switching device to have at least one first bending part (6) from the yoke sleeve (5).

Description

Die Erfindung betrifft ein Schaltgerät gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a switching device according to the preamble of claim 1.

Es sind Schaltgeräte mit magnetischen Austöseanordnungen bekannt. Derartige magnetische Auslöseanordnungen dienen in der Regel zum Trennen von Schaltkontakten im Falle eines auftretenden Kurzschlusses. Die magnetische Auslöseanordnung weist in der Regel eine stromdurchflossene Spule auf, welche von einem Joch umschlossen ist. Im Inneren der Spule ist ein beweglicher Anker angeordnet, welcher durch das Magnetfeld der stromdurchflossenen Spule gegen eine Ankerfeder beschleunigt wird, und beim Auftreten eines Kurzschlusses das Trennen eines beweglichen elektrischen Kontakts von einem feststehenden elektrischen Kontakt verursacht. Zur Bündelung der magnetischen Feldlinien auf den Anker hin ist es bekannt am Joch eine auf den Anker hinweisende Jochhülse anzuordnen, welche in spanabhebender Fertigung als Drehteil ausgebildet ist.There are switching devices with magnetic Austöseanordnungen known. Such magnetic trip devices are usually used to disconnect switch contacts in the event of a short circuit occurring. The magnetic release arrangement generally has a current-carrying coil which is enclosed by a yoke. Inside the coil, a movable armature is arranged, which is accelerated by the magnetic field of the current-carrying coil against an armature spring, and causes the occurrence of a short circuit, the separation of a movable electrical contact from a fixed electrical contact. For bundling the magnetic field lines towards the armature, it is known to arrange a yoke sleeve pointing towards the armature, which is designed as a turned part in machining production.

Die DE 25 31 215 A1 beschreibt einen magnetischen Auslöser mit einem Anker, einer Spule und einem Joch, wobei die Jochhülse als Blechbiegeteil ausgeführt ist.The DE 25 31 215 A1 describes a magnetic release with an armature, a coil and a yoke, wherein the yoke sleeve is designed as a bent sheet metal part.

Aus der DE 10 2005 020167 A1 geht ein elektromagnetischer Auslöser für einen Leitungsschutzschalter mit einem Joch und einem beweglichen Anker hervor, wobei das Joch als Blechbiegeteil ausgebildet ist.From the DE 10 2005 020167 A1 goes out an electromagnetic trigger for a circuit breaker with a yoke and a movable armature, wherein the yoke is formed as a sheet metal bent part.

Die DE 198 45 476 A1 offenbart ein Magnetsystem mit einem Joch, einer Spule, einer in diester Spule angeordneten Hülse und einem Anker.The DE 198 45 476 A1 discloses a magnet system having a yoke, a coil, a sleeve disposed in a diester coil, and an armature.

Aufgabe der Erfindung ist es ein Schaltgerät der eingangs genannten Art anzugeben, bei welchem der Fertigungs-, Energie- und Rohstoffaufwand zu dessen Herstellung gesenkt werden können.The object of the invention is to provide a switching device of the type mentioned, in which the manufacturing, energy and raw material costs for its production can be reduced.

Erfindungsgemäß wird dies durch die Merkmale des Patentanspruches 1 erreicht.This is achieved by the features of claim 1 according to the invention.

Dadurch kann auf die aufwendige spanabhebende Fertigung der Jochhülse verzichtet werden. Dadurch können bei der Herstellung der Jochhülse Zeit und Herstellungskosten gespart werden Dadurch fällt bei der Herstellung der Jochhülse kein Abfall in Form hochwertigen metallischen Werkstoffes an. Durch den geringeren Metallaufwand können neben den Herstellungskosten auch die Aufwendungen für den Materialeinkauf gesenkt werden. Dadurch sinkt sowohl der Energieaufwand zur Herstellung einer Jochhülse, als auch der Rohstoffaufwand. Dadurch wird sowohl die notwendige Energie als auch die begrenzten Rohstoffe verantwortungsbewusst verwendet, und nicht verschwendet, wodurch die Umweltbelastung reduziert wird.As a result, it is possible to dispense with the expensive machining of the yoke sleeve. As a result, time and production costs can be saved in the production of the yoke sleeve. In this way, no waste in the form of high-grade metallic material is produced during the production of the yoke sleeve. Due to the lower metal costs, not only the production costs but also the expenses for the purchase of materials can be reduced. This reduces both the energy required to produce a yoke sleeve, as well as the raw material costs. As a result, both the necessary energy and the limited resources are used responsibly and not wasted, thereby reducing environmental impact.

Die Unteransprüche, welche ebenso wie der Patentaspruch 1 gleichzeitig einen Teil der. Beschreibung bilden, betreffen weitere vorteilhafte Ausgestaltungen der ErfindungThe dependent claims, which as well as the patent claim 1 at the same time a part of. Describe form, relate to further advantageous embodiments of the invention

Die Erfindung wird unter Bezugnahme auf die beigeschlossenen Zeichnungen, in welchen lediglich bevorzugte Ausführungsformen beispielhaft dargestellt sind, näher beschrieben. Dabei zeigt:

  • Fig. 1 eine magnetische Auslöseanordnung für ein erfindungsgemäßes Schaltgerät in axonometrischer Darstellung;
  • Fig. 2 die magnetische Auslöseanordnung gemäß Fig. 1 im Seitenriss;
  • Fig. 3 die magnetische Auslöseanordnung gemäß Fig. 1 im Aufriss;
  • Fig. 4 die Ansicht gemäß Fig. 3 in teilweise geschnittener Darstellung;
  • Fig. 5 die Ansicht gemäß Fig. 1 in Explosionsdarstellung;
  • Fig. 6 eine Jochhülse gemäß dem Stand der Technik;
  • Fig. 7 eine erfindungsgemäße Jochhülse; und
  • Fig. 8 eine Jochhülse gemäß Fig. 7 in Explosionsdarstellung.
The invention will be described in more detail with reference to the accompanying drawings, in which only preferred embodiments are shown by way of example. Showing:
  • Fig. 1 a magnetic trip device for a switching device according to the invention in axonometric representation;
  • Fig. 2 the magnetic trip device according to Fig. 1 in side elevation;
  • Fig. 3 the magnetic trip device according to Fig. 1 in the elevation;
  • Fig. 4 the view according to Fig. 3 in a partially sectioned illustration;
  • Fig. 5 the view according to Fig. 1 in exploded view;
  • Fig. 6 a yoke sleeve according to the prior art;
  • Fig. 7 a yoke sleeve according to the invention; and
  • Fig. 8 a yoke sleeve according to Fig. 7 in exploded view.

Die Fig. 1 bis 5 zeigen eine magnetische Auslöseanordnung 1 für ein Schaltgerät, wobei die magnetische Auslöseanordnung 1 wenigstens einen Anker 2, eine Spule 3, ein Joch 4 und eine Jochhülse 5 aufweist, wobei der Anker 2 und die Jochhülse 5 im Wesentlichen fluchtend angeordnet sind, wobei die Spule 3 im Wesentlichen um den Anker 2 und/oder die Jochhülse 5 herum angeordnet ist, wobei das Joch 4 um die Spule 3 herum angeordnet ist, und wobei der Anker 2 zum wenigstens mittelbaren Auslösen einer Trennvorrichtung des Schaltgeräts vorgesehen ist, wobei die Jochhülse 5 durch wenigstens einen ersten Biegeteil 6 gebildet ist. Dadurch kann auf die aufwendige spanabhebende Fertigung der Jochhülse 5 verzichtet werden. Dadurch können bei der Herstellung der Jochhülse 5 Zeit und Herstellungskosten gespart werden. Dadurch fällt bei der Herstellung der Jochhülse 5 kein Abfall in Form hochwertigen metallischen Werkstoffes an. Durch den geringeren Metallaufwand können neben den Herstellungskosten auch die Aufwendungen für den Materialeinkauf gesenkt werden. Dadurch sinkt sowohl der Energieaufwand zur Herstellung einer Jochhülse 5, als auch der Rohstoffaufwand. Dadurch wird sowohl die notwendige Energie als auch die begrenzten Rohstoffe verantwortungsbewusst verwendet, und nicht verschwendet, wodurch die Umweltbelastung reduziert wird.The Fig. 1 to 5 show a magnetic trip device 1 for a switching device, wherein the magnetic trip device 1 at least one armature 2, a coil 3, a yoke 4 and a yoke sleeve 5, wherein the armature 2 and the yoke sleeve 5 are arranged substantially in alignment, wherein the coil is arranged substantially around the armature 2 and / or the Jochhülse 5 around, wherein the yoke 4 is arranged around the coil 3 around, and wherein the armature 2 is provided for at least indirectly triggering a disconnecting device of the switching device, wherein the yoke sleeve 5 by at least a first bending part 6 is formed. As a result, the elaborate machining of the yoke sleeve 5 can be dispensed with. As a result, 5 time and production costs can be saved in the production of the yoke sleeve. As a result, no waste in the form of high-grade metallic material is produced during the production of the yoke sleeve 5. Due to the lower metal costs, not only the production costs but also the expenses for the purchase of materials can be reduced. This reduces both the energy required to produce a yoke sleeve 5, as well as the cost of raw materials. As a result, both the necessary energy and the limited resources are used responsibly and not wasted, thereby reducing environmental impact.

Erfindungsgemäße Schaltgeräte sind bevorzugt als Leitungsschutzschalter und/oder Leistungsschutzschalter ausgebildet. Erfindungsgemäße Schaltgeräte weisen wenigstens zwei Anschlussklemmen 11, eine Eingangs- und eine Ausgangsklemme, auf, zum Anschluss elektrischer Leiter einer zu schützenden elektrischen Leitung. Es können sowohl Schaltgeräte mit einer einzigen als auch mit einer vorgebbaren Mehrzahl elektrischer Schaltstrecken vorgesehen sein. Erfindungsgemäße Schaltgeräte weisen je Schaltstrecke wenigstens einen beweglichen elektrischen Schaltkontakt auf, welcher mit einem weiteren, vorzugsweise feststehenden, elektrischen Schaltkontakt 13 ein Schaltkontaktpaar zum Schließen bzw. Öffnen der zu schützenden elektrischen Leitung bildet. Der wenigstens eine bewegliche elektrische Schaltkontakt wird bevorzugt durch ein Schaltschloss bewegt. Vorzugsweise sind im Wesentlichen sämtliche Baugruppen eines erfindungsgemäßen Schaltgeräts innerhalb eines Isolierstoffgehäuses angeordnet, welches Durchbrechungen wenigstens für einen manuellen Betätigungshebel, sowie für die Anschlussklemmen 11 aufweist. Erfindungsgemäße Schaltgeräte werden in der Regel in den stromführenden Außenleitem bzw. Phasen angeordnet.Switching devices according to the invention are preferably designed as a circuit breaker and / or circuit breaker. Switching devices according to the invention have at least two connection terminals 11, an input terminal and an output terminal, for connecting electrical conductors of an electrical line to be protected. It can be provided both switching devices with a single and with a predetermined plurality of electrical switching paths. Switching devices according to the invention have at least one movable electrical switching contact per switching path, which with a further, preferably fixed, electrical switching contact 13 forms a switching contact pair for closing or opening the electrical line to be protected. The at least one movable electrical switching contact is preferably moved by a switching mechanism. Preferably essentially all assemblies of a switching device according to the invention arranged within an insulating housing, which has openings at least for a manual operating lever, as well as for the terminals 11. Switching devices according to the invention are generally arranged in the current-carrying outer conductors or phases.

Erfindungsgemäße Schaltgeräte weisen wenigstens eine magnetische Auslöseanordnung 1 auf, welche zur Auslösung des Schaltgeräts, daher zum Trennen der elektrischen Schaltkontakte 13, im Falle eines in der zu schützenden elektrischen Leitung auftretenden Kurzschlusses, daher einer niederohmigen Verbindung zwischen einem Außenleiter bzw. einer Phase und dem Neutralleiter, vorgesehen ist. Weiters weisen besonders bevorzugte Ausführungsformen erfindungsgemäßer Schaltgeräte weiters eine thermische Auslöseanordnung auf, welche bevorzugt umfassend ein Bimetallelement ausgebildet ist, zur Auslösung des Schaltgeräts aufgrund eines geringfügig erhöhten Stromflusses.Switching devices according to the invention have at least one magnetic triggering arrangement 1, which is used to trip the switching device, therefore to disconnect the electrical switching contacts 13, in the case of a short circuit occurring in the electrical line to be protected, therefore a low-resistance connection between an outer conductor or a phase and the neutral conductor , is provided. Furthermore, particularly preferred embodiments of switching devices according to the invention further comprise a thermal trip arrangement, which is preferably formed comprising a bimetallic element, for triggering the switching device due to a slightly increased current flow.

Die magnetische Auslöseanordnung umfasst wenigstens einen Anker 2, eine Spule 3, ein Joch 4 und eine Jochhülse 5. Die Spule 3 bildet innerhalb des Schaltgeräts einen Teil der zu schützenden elektrischen Leitung. Ein erster Anschlussleiter 10 der Spule 3 ist mit einer Anschlussklemme 11 des Schaltgeräts verbunden, und ein zweiter Anschlussleiter 12 der Spule 3 ist mit einem feststehenden Schaltkontakt 13 des Schaltgeräts verbunden. Die Spule 3 ist bevorzugt um einen Wicklungsträger 14 aus Isolierstoff herum angeordnet, welcher im Wesentlichen die Form eines Zylinders aufweist, an dessen einem Ende eine Schulter 18 angeformt ist. Die Spule 3 ist wenigstens bereichsweise von einem Joch 4 umschlossen, welches bevorzugt als Blechbiege-/Stanzteil ausgebildet ist, und vorzugsweise die Form eines im Wesentlichen rechteckigen Kastens aufweist, und zur Führung des magnetischen Flusses dient. Gemäß der in den Fig. 1 bis 5 dargestellten bevorzugten Ausführungsform ist der zweite Anschlussleiter 12 der Spule 3 mit einem Kontaktträger 15 verbunden, welcher den feststehenden elektrischen Schaltkontakt 13 trägt, wobei der Kontaktträger 15 bevorzugt weiters auch mit dem Joch 4 verbunden ist.The magnetic trip device comprises at least one armature 2, a coil 3, a yoke 4 and a yoke sleeve 5. The coil 3 forms part of the electrical line to be protected within the switching device. A first connection conductor 10 of the coil 3 is connected to a connection terminal 11 of the switching device, and a second connection conductor 12 of the coil 3 is connected to a fixed switching contact 13 of the switching device. The coil 3 is preferably arranged around a winding support 14 made of insulating material, which essentially has the shape of a cylinder, at one end of which a shoulder 18 is formed. The coil 3 is at least partially enclosed by a yoke 4, which is preferably formed as a sheet metal bending / stamping part, and preferably in the form of a substantially rectangular box, and serves to guide the magnetic flux. According to the in the Fig. 1 to 5 2, the second connecting conductor 12 of the coil 3 is connected to a contact carrier 15, which carries the fixed electrical switching contact 13, the contact carrier 15 preferably also being connected to the yoke 4.

Innerhalb des Wicklungsträgers 14 ist ein beweglicher, insbesondere entlang dessen Längserstreckung verschiebbarer, Anker 2 angeordnet, und wird durch den Wicklungsträger 14 geführt, wobei der Anker 2 durch eine Ankerfeder 9 in Richtung hin zu einer Ruheposition gedrückt wird, welche bevorzugt durch die Schulter 18 des Wicklungsträgers 14 gebildet ist. Die Spule 3, insbesondere die Anzahl und Ausbildung der Spulenwindungen, und die Federkraft der Ankerfeder 9 sind derart bemessen, dass die Ankerfeder 9 im kurzschlussfreien Betrieb den Anker 2 gegen die Ruheposition drückt, im Kurzschlussfall jedoch der Anker 2 durch die von der Spule erzeugte elektromotorische Kraft derart stark gegen die Federkraft der Ankerfeder beschleunigt wird, dass deren Federkraft überwunden wird und sich der Anker 2 von dessen Ruheposition weg bewegt, und eine Auslösung des Schaltgeräts verursacht.Within the winding support 14 is a movable, in particular displaceable along the longitudinal extension, anchor 2 is arranged, and is guided by the winding support 14, wherein the armature 2 is urged by an armature spring 9 toward a rest position, which preferably by the shoulder 18 of Winding support 14 is formed. The coil 3, in particular the number and design of the coil turns, and the spring force of the armature spring 9 are dimensioned such that the armature spring 9 in short-circuit Operating the armature 2 presses against the rest position, in the short circuit case, however, the armature 2 is accelerated by the electromotive force generated by the coil so strong against the spring force of the armature spring that its spring force is overcome and the armature 2 moves away from its rest position, and causes a tripping of the switching device.

Bei der in den Fig. 1 bis 5 dargestellten besonders bevorzugten Ausführungsform einer magnetischen Auslöseanordnung 1 ist vorgesehen, dass der Anker 2 direkt den Schalter nicht auslöst, sondern, dass der Anker 2 einen Stößel 8 antreibt, welcher aus einem Isolierstoff gebildet ist, und der Anker 2 mittelbar über den Stößel 8 den Schalter auslöst. Hiezu weist das Joch 4 weiters wenigstens eine erste Durchbrechung 19 auf, welche bevorzugt dem feststehenden elektrischen Schaltkontakt 13 zugewandt ist, und durch welche hindurch der Stößel 8 auf ein, vorzugsweise vorgesehenes Schaltschloss wirkt, und die Aufbewegung des beweglichen Schaltkontakts verursacht. Bei dieser bevorzugten Ausführungsform ist der Anker 2 selbst als Hohlzylinder ausgebildet, an dessen der ersten Durchbrechung 19 abgewandten Seite ein Anschlag 20 für den Stößel 8 angeformt ist. Der Anker 2 ist gemäß der dargestellten bevorzugten Ausführungsform als Biegeteil ausgebildet. Bei einer magnetischen Auslöseanordnung gemäß der in den Fig. 1 bis 5 dargestellten besonders bevorzugten Ausführungsform weist das Joch weiters eine zweite Durchbrechung 23 auf, durch welche der Wicklungsträger geführt ist.In the in the Fig. 1 to 5 illustrated particularly preferred embodiment of a magnetic trip device 1 is provided that the armature 2 does not trigger the switch directly, but that the armature 2 drives a plunger 8, which is formed of an insulating material, and the armature 2 indirectly via the plunger 8 the switch triggers. For this purpose, the yoke 4 further comprises at least a first opening 19, which preferably faces the fixed electrical switching contact 13, and through which the plunger 8 acts on a, preferably provided switch lock, and causes the upward movement of the movable switch contact. In this preferred embodiment, the armature 2 itself is designed as a hollow cylinder, on whose side facing away from the first opening 19, a stop 20 is formed for the plunger 8. The armature 2 is formed according to the illustrated preferred embodiment as a bent part. In a magnetic trip device according to the in the Fig. 1 to 5 illustrated particularly preferred embodiment, the yoke further comprises a second opening 23 through which the winding support is guided.

An dem Joch 4 ist weiters eine Jochhülse 5 fluchtend zum Anker 2 angeordnet, welche gemäß der bevorzugten Ausführungsform innerhalb der Spule 3 bzw. des Wicklungsträgers 14 angeordnet ist. Die Jochhülse 5 dient zur Führung bzw. Leitung der magnetischen Feldlinien des durch die Spule 3 erzeugten Magnetfeldes hin zum Anker. Daher ist vorgesehen, dass das Joch 4, der Anker 2 und/oder die Jochhülse 5 einen ferromagnetischen Werkstoff umfassen. Bevorzugt ist die Jochhülse 5 im Bereich der ersten Durchbrechung 19 angeordnet, wobei besonders bevorzugt vorgesehen ist, dass die Jochhülse 5 wenigstens bereichsweise in der ersten Durchbrechung 19 angeordnet ist, und vorzugsweise mit der ersten Durchbrechung 19 verpresst bzw. vernietet ist. Die Jochhülse 5 weist eine Durchgangsöffnung 21 auf, um ein Durchdringen derselben durch den Stößel 8 zu ermöglichen. Fig. 6 zeigt eine Jochhülse 16 gemäß dem bekannten Stand der Technik, welche als Drehteil ausgebildet ist.At the yoke 4 is further arranged a yoke sleeve 5 in alignment with the armature 2, which is arranged according to the preferred embodiment within the coil 3 and the winding support 14. The yoke sleeve 5 serves to guide or guide the magnetic field lines of the magnetic field generated by the coil 3 toward the armature. It is therefore provided that the yoke 4, the armature 2 and / or the yoke sleeve 5 comprise a ferromagnetic material. Preferably, the yoke sleeve 5 is arranged in the region of the first opening 19, wherein it is particularly preferred that the yoke sleeve 5 is at least partially disposed in the first opening 19, and preferably with the first opening 19 is pressed or riveted. The yoke sleeve 5 has a passage opening 21 in order to allow it to penetrate through the plunger 8. Fig. 6 shows a yoke sleeve 16 according to the known prior art, which is designed as a rotating part.

Der Aufbau einer besonders bevorzugten magnetischen Auslöseanordnung 1 für erfindungsgemäße Schaltgeräte ist besonders gut in den Fig. 1 bis 5 dargestellt, wobei in Fig. 5 der innere Aufbau besonders gut zu erkennen ist.The structure of a particularly preferred magnetic trip device 1 for switching devices according to the invention is particularly well in the Fig. 1 to 5 shown, in Fig. 5 the internal structure is particularly easy to recognize.

Es ist vorgesehen, dass die Jochhülse 5 durch wenigstens einen ersten Biegeteil 6 gebildet ist. Unter einem Biegeteil ist dabei im weiten Sinne ein durch Biegen, Knicken und/oder Rollen aus einem Blech gebildeter Bauteil. Gemäß den dargestellten besonders bevorzugten Ausführungsformen einer Jochhülse 5 ist der erste Biegeteil 6 aus einem im Wesentlichen rechteckigen Blech gebildet, welches zu einem im Wesentlichen zylindrischen Körper gebogen bzw. eingerollt ist. Eine derart gebildete Jochhülse 5 weist einen Luftspalt 17 in deren Längsrichtung auf, welcher jedoch keine nennenswerten magnetischen Verluste verursacht, da dieser Luftspalt 17 parallel zu den durch die Spule 3 verursachten magnetischen Feldlinien angeordnet ist. Durch den Luftspalt 17 kann die Beeinträchtigung der magnetischen Auslöseanordnung 1 durch von außen eingestreute Magnetfelder reduziert werden, da der Luftspalt 17 für magnetische Feldlinien, welche nicht zu diesem parallel angeordnet sind, einen erheblichen Widerstand darstellt.It is envisaged that the yoke sleeve 5 is formed by at least one first bending part 6. Under a bent part is in the broad sense formed by bending, bending and / or rolling of a sheet metal component. According to the illustrated particularly preferred embodiments of a yoke sleeve 5, the first bent part 6 is formed from a substantially rectangular sheet, which is bent or rolled into a substantially cylindrical body. A yoke sleeve 5 formed in this way has an air gap 17 in its longitudinal direction, which, however, does not cause appreciable magnetic losses, since this air gap 17 is arranged parallel to the magnetic field lines caused by the coil 3. Through the air gap 17, the impairment of the magnetic trip device 1 can be reduced by externally interspersed magnetic fields, since the air gap 17 for magnetic field lines, which are not arranged parallel to this, represents a considerable resistance.

Die Fig. 7 und 8 zeigen eine Ausführungsform einer erfindungsgemäßen Jochhülse 5, welche einen ersten Biegeteil 6 und einen zweiten Biegeteil 7 aufweist, bzw. aus solchen gebildet ist, wobei der erste Biegeteil 6 innerhalb des zweiten Biegeteils 7 angeordnet ist. Eine derart gebildete Jochhülse 5 weist eine Jochschulter 22 auf, welche für den automatisierten Zusammenbau der magnetischen Auslöseanordnung 1 einen vorteilhaften Anschlag darstellt, und so den Zusammenbau von Joch 4 und Jochhülse 5 vereinfacht. Der erste Biegeteil 6 ist mit dem zweiten Biegeteil 7 gemäß einer bevorzugten Ausführungsform vorzugsweise mittels Presspassung verbunden, wodurch auf zusätzliche verbindungssichernde Maßnahmen verzichtet werden kann, und eine einfache und kostengünstige Fertigung erreicht wird. Alternativ hiezu kann vorgesehen sein, dass der erste Biegeteil 6 mit dem zweiten Biegeteil 7 formschlüssig verbunden ist. Eine derartige formschlüssige Verbindung kann etwa durch eine gerändelte äußere Oberfläche des ersten Biegeteils 6 erreicht werden, in welche eine, vorzugsweise gerändelte, innere Oberfläche des zweiten Biegeteils 7 eingreift. Die formschlüssige Verbindung kann aber auch durch eine vorgebbare plastische Verformung der bereits zusammengefügten ersten und zweiten Biegeteile 6, 7 erreicht werden. Durch eine derartige formschlüssige Verbindung kann ein besonders sicherer Halt des ersten Biegeteils 6 in dem zweiten Biegeteil 7 erreicht werden.The FIGS. 7 and 8 show an embodiment of a yoke sleeve 5 according to the invention, which has a first bending part 6 and a second bending part 7, or is formed from such, wherein the first bending part 6 is disposed within the second bending part 7. A yoke sleeve 5 formed in this way has a yoke shoulder 22, which represents an advantageous stop for the automated assembly of the magnetic trip device 1, and thus simplifies the assembly of yoke 4 and yoke sleeve 5. The first bending part 6 is preferably connected to the second bending part 7 according to a preferred embodiment by means of a press fit, whereby additional connection-securing measures can be dispensed with, and a simple and cost-effective production is achieved. Alternatively, it can be provided that the first bending part 6 is positively connected to the second bending part 7. Such a positive connection can be achieved for example by a knurled outer surface of the first bending part 6, in which a, preferably knurled, inner surface of the second bending part 7 engages. The positive connection can also be achieved by a predetermined plastic deformation of the already assembled first and second bending parts 6, 7. By such a positive connection, a particularly secure hold of the first bending part 6 in the second bending part 7 can be achieved.

Claims (9)

  1. A switching device with a magnetic tripping arrangement (1), with the magnetic tripping arrangement (1) comprising at least one armature (2), a coil (3), a yoke (4) and a yoke sleeve (5), with the armature (2) and the yoke sleeve (5) being arranged in a substantially flush manner, with the coil (3) being arranged substantially around the armature (2) and/or the yoke sleeve (5), with the yoke (4) being arranged about the coil (3), and with the armature (2) being formed for the at least indirect tripping of a disconnecting apparatus of the switching device, with the yoke sleeve (5) being formed by at least one first bent part (6), characterized in that the yoke sleeve (5) comprises the first bent part (6) and a second bent part (7), and that the first bent part (6) is arranged within the second bent part (7).
  2. A switching device according to claim 1, characterized in that the first bent part (6) is connected with the second bent part (7) by means of press fit.
  3. A switching device according to claim 1 or 2, characterized in that the first bent part (6) is connected with the second bent part (7) in an interlocking manner.
  4. A switching device according to one of the claims 1 to 3, characterized in that the first bent part (6) is arranged within the second bent part (7) by forming a yoke shoulder (22).
  5. A switching device according to one of the claims 1 to 4, characterized in that the yoke sleeve (5) is arranged as a component that is separate from the yoke (4).
  6. A switching device according to claim 5, characterized in that the yoke sleeve (5) is arranged in a first breakthrough (19) of the yoke.
  7. A switching device according to one of the claims 1 to 6, characterized in that a tappet (8) is arranged within the yoke sleeve (5), which tappet is impinged at least indirectly by an armature spring (9),
  8. A switching device according to one of the claims 1 to 7, characterized in that the yoke (4), the armature (2) and/or the yoke sleeve (5) comprise a ferromagnetic material.
  9. A switching device according to one of the claims I to 8, characterized in that a first connecting lead (10) of the coil (3) is connected with a terminal (11) of the switching device, and a second connecting lead (12) of the coil (3) with a fixed electric switching contact (13) of the switching device.
EP09775551A 2008-07-31 2009-07-02 Switching device Active EP2313905B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09775551T PL2313905T3 (en) 2008-07-31 2009-07-02 Switching device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0119008A AT509279A1 (en) 2008-07-31 2008-07-31 SWITCHGEAR
PCT/AT2009/000260 WO2010012012A1 (en) 2008-07-31 2009-07-02 Switching device

Publications (2)

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EP2313905A1 EP2313905A1 (en) 2011-04-27
EP2313905B1 true EP2313905B1 (en) 2012-04-04

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US (1) US20100026430A1 (en)
EP (1) EP2313905B1 (en)
CN (1) CN102113079B (en)
AT (3) AT509279A1 (en)
AU (1) AU2009276298B2 (en)
ES (1) ES2384913T3 (en)
PL (1) PL2313905T3 (en)
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WO (1) WO2010012012A1 (en)

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ES2384913T3 (en) 2012-07-13
RU2523717C2 (en) 2014-07-20
CN102113079B (en) 2014-05-28
WO2010012012A1 (en) 2010-02-04
AT509279A1 (en) 2011-07-15
WO2010012012A8 (en) 2010-04-08
US20100026430A1 (en) 2010-02-04
CN102113079A (en) 2011-06-29
AU2009276298A1 (en) 2010-02-04
ATE552605T1 (en) 2012-04-15
PL2313905T3 (en) 2012-10-31
EP2313905A1 (en) 2011-04-27
AT517193A5 (en) 2016-11-15
AU2009276298B2 (en) 2015-09-03
RU2011107218A (en) 2012-09-10

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