EP0118413B1 - Trip device with holding magnet - Google Patents

Trip device with holding magnet Download PDF

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Publication number
EP0118413B1
EP0118413B1 EP19840890014 EP84890014A EP0118413B1 EP 0118413 B1 EP0118413 B1 EP 0118413B1 EP 19840890014 EP19840890014 EP 19840890014 EP 84890014 A EP84890014 A EP 84890014A EP 0118413 B1 EP0118413 B1 EP 0118413B1
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EP
European Patent Office
Prior art keywords
lever
housing
armature
tripping
holding magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19840890014
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German (de)
French (fr)
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EP0118413A1 (en
Inventor
Gerhard Amon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felten & Guilleaume Fabrik Elektrischer Apparate AG Schrems-Eugenia Niederosterreich
Original Assignee
Felten & Guilleaume Fabrik Elektrischer Apparate AG Schrems-Eugenia Niederosterreich
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Publication of EP0118413A1 publication Critical patent/EP0118413A1/en
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Publication of EP0118413B1 publication Critical patent/EP0118413B1/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
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/325—Housings, assembly or disposition of different elements in the housing
    • H01H71/326—Sealed housings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H01H3/56—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using electromagnetic clutch

Definitions

  • the invention relates to a holding magnet trigger for residual current circuit breaker, in which the yoke body, permanent magnet, trip armature, excitation winding and trip spring are provided in a hermetically sealed, in particular evacuated, with a protective gas, such as nitrogen or a liquid, such as silicone oil, and in which the Cables for excitation winding are led tightly into the interior of the housing.
  • a protective gas such as nitrogen or a liquid, such as silicone oil
  • Holding magnet release as z. B. are described in AT-B-278 954, are usually built, especially for residual current circuit breakers, in the dust-protected version as possible.
  • the dust protection is not complete, however, since the power transmission from and to the release armature of the magnetic release in the form of a slide or an axis has bearing clearance through which dust can penetrate. For the same reason, there is no protection against moisture and chemically aggressive gases. The corrosions caused by this, like dust, can cause the magnetic release to not function properly.
  • EP-A-0 026 804 discloses a hermetically sealed permanent magnetic release for residual current circuit breakers.
  • an elastically deformable force transmission zone is provided in a wall of the housing, via which the movements of the armature are transmitted to the outside.
  • a line circuit breaker is known from GB-A-1598 409, in which the bimetal and the magnetic release are arranged in a hermetically sealed housing.
  • the trigger In order to transmit the movement of the trigger to the outside in the event of a trigger, the trigger is assigned a pivoting lever carrying a permanent magnet. Another permanent magnet is located opposite the permanent magnet outside the housing.
  • the permanent magnet arranged in the interior of the housing is raised and thereby brought closer to the permanent magnet arranged outside the housing until it is attracted against the force of a spring.
  • To reset it is necessary to lift the outer permanent magnet by hand so far that the swivel lever arranged in the interior of the housing can pivot downward with the permanent magnet.
  • the circuit breaker known from GB-A-1598409 requires a very specific installation position. Every change in this installation position results in a change in the tripping characteristic.
  • the invention has for its object to provide a magnetic release of the type mentioned, which is actually protected against the ingress of dust, moisture and aggressive gases and does not require any elastically deformable components through which the movements of the armature are transmitted.
  • the release armature is coupled via at least one permanent magnet coupling to an outer lever arranged outside the housing for executing rectified movements and in that a half of the permanent magnet coupling arranged inside the housing is provided on a lever which is pivotably mounted inside the housing and which is either an anchor lever carrying the release anchor or an inner lever coupled to the release anchor.
  • An advantage of the holding magnet release according to the invention over the circuit breaker according to GB-A-1 598 409 is that the two halves of the permanent magnet coupling always perform the same movements and the distance between the halves of the permanent magnet coupling is not changed either in the event of tripping or when resetting. As a result, the means for keeping the permanent magnets apart required in GB-A-1 598 409 can be dispensed with.
  • a holding magnet release shown in FIG. 1 has an at least two-layer yoke 1 with an excitation winding 2, a permanent magnet 3, a release armature 4 with an armature lever 5 and a release spring 6.
  • the trip armature 4 When the excitation winding 2 is de-energized, the trip armature 4 is held against the pulling action of the trip spring 6 by the permanent magnet 3 on the yoke 1. If, on the other hand, current flows through the excitation winding 2, the permanent flow is weakened and the trigger armature 4 falls off the yoke 1 if the weakening is sufficient.
  • the trigger armature 4 moves a coupling pin 7 and this a permanent magnet coupling, which consists of four permanent magnets 8a, 8b, 8c and 8d, an inner lever 9 carrying the permanent magnets 8b and 8c and an outer lever, not shown, carrying the permanent magnets 8a and 8d.
  • all of the aforementioned components are located in a hermetically sealed housing 10 made of magnetically non-conductive material.
  • FIG. 2 shows the holding magnet release with the release armature 4 fallen off.
  • the outer lever follows each rotation of the inner lever 9 with slight slippage.
  • B. be used to trigger the switch lock of a fault current circuit breaker, not shown.
  • the outer lever is turned, the inner lift 9 follows with a small amount of slip and guides the release armature 4 back to the yoke 1 with the aid of the coupling pin 7, the release spring 6 being tensioned again.
  • the gaps between the permanent magnets 8a and 8b or 8c and 8d are kept small by an at least in this area thin-walled and / or curved design of the housing 10 and possibly the inside and outside lever are designed as a magnetic yoke for the permanent flux.
  • the hermetic seal is such. B. completed by soldering a two-part housing and soldered glass bushings 11 for the excitation winding 2.
  • a protective gas such as nitrogen or a liquid, e.g. B. a silicone oil.
  • a liquid e.g. B. a silicone oil.
  • the liquid acts as a damping medium.
  • the arrangement of the four permanent magnets 8a, 8b, 8c and 8d, as shown in FIGS. 1 and 2, means that no radial tensile forces act on the axes of the inner or outer lever.
  • the coupling parts are easily balanced, making the permanent magnet coupling insensitive to vibrations.
  • two permanent magnets e.g. B. the permanent magnets 8a and 8b, omitted.
  • the structure of the hermetically sealed holding magnet release with permanent magnetic coupling according to the invention can be simplified compared to the embodiment shown in Figures 1 and 2 by dispensing with the coupling pin 7 and the armature lever 5 is redesigned so that it also functions as the inner lever 9 of the embodiment shown takes over.
  • the armature lever 5, which is designed, for example, as an equal arm, carries permanent magnets at one or both of its ends, which are opposed by the permanent magnets or soft iron parts arranged on the outer lever (not shown) outside the housing.
  • the armature lever 5 carries a soft iron part at one or both of its ends, which the magnets of the outer lever lying outside the housing 10 lie opposite.

Description

Die Erfindung betrifft einen Haltemagnetauslöser für Fehlerstrom-Schutzschalter, bei dem Jochkörper, Permanentmagnet, Auslöseanker, Erregerwicklung und Auslösefeder in einem hermetisch dichten, insbesondere evakuierten, mit einem Schutzgas, wie Stickstoff oder einer Flüssigkeit, wie Silikonöl gefüllten, Gehäuse vorgesehen sind und bei dem die Leitungen zur Erregerwicklung dicht in das Innere des Gehäuses geführt sind.The invention relates to a holding magnet trigger for residual current circuit breaker, in which the yoke body, permanent magnet, trip armature, excitation winding and trip spring are provided in a hermetically sealed, in particular evacuated, with a protective gas, such as nitrogen or a liquid, such as silicone oil, and in which the Cables for excitation winding are led tightly into the interior of the housing.

Haltemagnetauslöser, wie sie z. B. in der AT-B-278 954 beschrieben sind, werden üblicherweise, insbesondere für Fehlerstrom-Schutzschalter, in möglichst staubgeschützter Ausführung gebaut. Der Staubschutz ist aber nicht vollständig, da die Kraftübertragung vom und zum Ausloseanker des Haltemagnetauslösers in Form eines Schiebers oder einer Achse Lagerluft aufweist, durch die Staub eindringen kann. Aus dem gleichen Grund ist auch kein Schutz vor Feuchtigkeit und chemisch aggressiven Gasen vorhanden. Die dadurch verursachten Korrosionen können ebenso wie Staub eine Funktionsunfähigkeit des Haltemagnetauslösers verursachen.Holding magnet release, as z. B. are described in AT-B-278 954, are usually built, especially for residual current circuit breakers, in the dust-protected version as possible. The dust protection is not complete, however, since the power transmission from and to the release armature of the magnetic release in the form of a slide or an axis has bearing clearance through which dust can penetrate. For the same reason, there is no protection against moisture and chemically aggressive gases. The corrosions caused by this, like dust, can cause the magnetic release to not function properly.

Ein Auslöse-Relais in einem hermetisch dichten Gehäuse unterzubringen, ist aus der AT-B-279 712 bekannt Die Steuerstange dieses Ausläse-Reiais wird mit Hilfe eines Faltenbalges durch das Gehäuse nach außen geführt.It is known from AT-B-279 712 to house a release relay in a hermetically sealed housing. The control rod of this outlet rice is guided through the housing to the outside with the aid of a bellows.

Aus der EP-A-0 026 804 ist ein hermetisch geschlossener permanentmagnetischer Auslöser für Fehlerstrom-Schutzschalter bekannt. Bei diesem Haltemagnetauslöser ist in einer Wand des Gehäuses eine elastisch verformbare Kraftübertragungszone vorgesehen, über welche die Bewegungen des Ankers nach außen übertragen werden.EP-A-0 026 804 discloses a hermetically sealed permanent magnetic release for residual current circuit breakers. In this holding magnet release, an elastically deformable force transmission zone is provided in a wall of the housing, via which the movements of the armature are transmitted to the outside.

Beiden bekannten Vorschlägen ist der Nachteil gemeinsam, daß sie elastisch verformbare Bauteile verwenden müssen. Diese elastisch verformbaren Bauteile behindern die Bewegungen, so daß die Auslöseempfindlichkeit der Haltemagnetauslöser beeinträchtigt wird. Zum anderen stellen elastisch verformbare Faltenbälge und gewellte Wandbereiche stets Schwachstellen dar, die zu Undichtheiten führen.The disadvantage of both known proposals is that they have to use elastically deformable components. These elastically deformable components hinder the movements, so that the trigger sensitivity of the holding magnet trigger is impaired. On the other hand, elastically deformable bellows and corrugated wall areas are always weak points that lead to leaks.

Aus der GB-A-1598 409 ist ein Leitungsschutzschalter bekann, bei dem der Bi-Metall- und der Magnetauslöser in einem hermetisch dicht verschlossenen Gehäuse angeordnet sind. Um im Auslösefall die Bewegung der Auslöser nach außen zu übertragen, ist den Auslösern ein einen Permanentmagnet tragender Schwenkhebel zugeordnet. Dem Permanentmagnet liegt außerhalb des Gehäuses ein weiterer Permanentmagnet gegenüber. Im Auslösefall wird der im Inneren des Gehäuses angeordnete Permanentmagnet angehoben und dadurch dem außerhalb des Gehäuses angeordneten Permanentmagnet angenähert, bis dieser gegen die Kraft einer Feder angezogen wird. Zum Zurückstellen ist es nötig, den äußeren Permanentmagneten von Hand so weit anzuheben, daß der im Inneren des Gehäuses angeordnete Schwenkhebel mit dem Permanentmagnet nach unten verschwenken kann.A line circuit breaker is known from GB-A-1598 409, in which the bimetal and the magnetic release are arranged in a hermetically sealed housing. In order to transmit the movement of the trigger to the outside in the event of a trigger, the trigger is assigned a pivoting lever carrying a permanent magnet. Another permanent magnet is located opposite the permanent magnet outside the housing. In the event of tripping, the permanent magnet arranged in the interior of the housing is raised and thereby brought closer to the permanent magnet arranged outside the housing until it is attracted against the force of a spring. To reset, it is necessary to lift the outer permanent magnet by hand so far that the swivel lever arranged in the interior of the housing can pivot downward with the permanent magnet.

Nachteilig bei diesem bekannten Schalter ist der Umstand, daß die beiden Permanentmagnete so weit voneinander entfernt werden müssen, daß sie sich nicht aufeinander zu bewegen und von der Feder bzw. unter der Wirkung der Schwerkraft im Abstand gehalten werden. Gerade diese Federkraft muß aber im Auslösefall überwunden werden.A disadvantage of this known switch is the fact that the two permanent magnets must be so far apart that they do not move towards each other and are kept at a distance by the spring or under the effect of gravity. However, this spring force must be overcome in the event of a trip.

Da der im Gehäuse angeordnete Permanentmagnet nur unter der Wirkung der Schwerkraft in seiner Bereitschaftsstellung bleibt, erfordert der aus der GB-A-1598409 bekannte Leitungsschutzschalter eine ganz bestimmte Einbaulage. Jede Änderung dieser Einbaulage hat eine Änderung der Auslösecharakteristik zur Folge.Since the permanent magnet arranged in the housing remains in its ready position only under the action of gravity, the circuit breaker known from GB-A-1598409 requires a very specific installation position. Every change in this installation position results in a change in the tripping characteristic.

Der Erfindung liegt die Aufgabe zugrunde, einen Haltemagnetauslöser der eingangs genannten Gattung anzugeben, der tatsächlich vor dem Eindringen von Staub, Feuchtigkeit und aggressiven Gasen geschützt ist und ohne elastisch verformbare Bauteile auskommt, über welche die Bewegungen des Ankers übertragen werden.The invention has for its object to provide a magnetic release of the type mentioned, which is actually protected against the ingress of dust, moisture and aggressive gases and does not require any elastically deformable components through which the movements of the armature are transmitted.

Erfindungsgemäß wird dies dadurch erreicht, daß der Auslöseanker über mindestens eine Permanentmagnetkupplung mit einem außerhalb des Gehäuses angeordneten Außenhebel zur Ausführung gleichgerichteter Bewegungen gekuppelt ist und daß eine im Inneren des Gehäuses angeordnete Hälfte der Permanentmagnetkupplung an einem im Inneren des Gehäuses schwenkbar gelagerten Hebel vorgesehen ist, der entweder ein den Auslöseanker tragender Ankerhebel oder ein mit dem Auslöseanker gekuppelter Innenhebel ist.According to the invention, this is achieved in that the release armature is coupled via at least one permanent magnet coupling to an outer lever arranged outside the housing for executing rectified movements and in that a half of the permanent magnet coupling arranged inside the housing is provided on a lever which is pivotably mounted inside the housing and which is either an anchor lever carrying the release anchor or an inner lever coupled to the release anchor.

Dadurch, daß beim erfindungsgemäßen Haltemagnetauslöser die Kraftübertragung vom und zum Auslöseanker mit Hilfe mindestens einer Permanentmagnetkupplung erfolgt, entfallen die bei den bekannten Haltemagnetauslösern unumgänglichen Durchführungen (Faltenbälge) beweglicher Teile durch das Gehäuse des Haltemagnetauslösers und die dadurch bedingte Gefahr von Undichtigkeiten.The fact that in the holding magnet release according to the invention the power transmission from and to the release armature takes place with the aid of at least one permanent magnet coupling, the inevitable lead-throughs (bellows) of moving parts through the housing of the holding magnet release and the consequent risk of leaks are eliminated in the known holding magnet releases.

Ein Vorteil des erfindungsgemäßen Haltemagnetauslösers gegenüber dem Schutzschalter gemäß der GB-A-1 598 409 besteht darin, daß die beiden Hälften der Permanentmagnetkupplung stets gleichgerichtete Bewegungen ausführen und der Abstand der Hälften der Permanentmagnetkupplung weder im Auslösefall noch beim Rückstellen geändert wird. Dadurch sind die bei der GB-A-1 598 409 erforderlichen Mittel zum Auseinanderhalten der Permanentmagnete entbehrlich.An advantage of the holding magnet release according to the invention over the circuit breaker according to GB-A-1 598 409 is that the two halves of the permanent magnet coupling always perform the same movements and the distance between the halves of the permanent magnet coupling is not changed either in the event of tripping or when resetting. As a result, the means for keeping the permanent magnets apart required in GB-A-1 598 409 can be dispensed with.

Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung des in der Zeichnung schematisch wiedergegebenen Ausführungsbeispieles. Es zeigt

  • Figur 1 einen Haltemagnetauslöser und
  • Figur 2 den Haltemagnetauslöser aus Figur 1 mit abgefallenem Auslöseanker.
Further details and features of the invention emerge from the subclaims and the following description of the exemplary embodiment shown schematically in the drawing. It shows
  • 1 shows a holding magnet release and
  • FIG. 2 shows the holding magnet release from FIG. 1 with the release anchor dropped off.

Ein in Figur 1 dargestellter Haltemagnetauslöser besitzt ein mindestens zweischichtiges Joch 1 mit einer Erregerwicklung 2, einem Permanentmagnet 3, einem Auslöseanker 4 mit einem Ankerhebel 5 sowie eine Auslösefeder 6.A holding magnet release shown in FIG. 1 has an at least two-layer yoke 1 with an excitation winding 2, a permanent magnet 3, a release armature 4 with an armature lever 5 and a release spring 6.

Bei stromloser Erregerwicklung 2 wird der Auslöseanker 4 entgegen der Zugwirkung der Auslösefeder 6 durch den Permanentmagnet 3 am Joch 1 festgehalten. Fließt hingegen durch die Erregerwicklung 2 Strom, so wird der PermanentfluB geschwächt und der Auslöseanker 4 fällt bei ausreichender Schwächung vom Joch 1 ab. Der Auslöseanker 4 bewegt einen Kupplungsstift 7 und dieser eine Permanentmagnetkupplung, die aus vier Permanentmagneten 8a, 8b, 8c und 8d, einem die Permanentmagnete 8b und 8c tragenden Innenhebel 9 und einem die Permanentmagnete 8a und 8d tragenden, nicht dargestellten Außenhebel besteht. Außer den beiden Permanentmagneten 8a und 8d und dem sie tragenden Außenhebel befinden sich alle vorgenannten Bauteile in einem hermetisch dichten Gehäuse 10 aus magnetisch nicht leitfähigem Werkstoff.When the excitation winding 2 is de-energized, the trip armature 4 is held against the pulling action of the trip spring 6 by the permanent magnet 3 on the yoke 1. If, on the other hand, current flows through the excitation winding 2, the permanent flow is weakened and the trigger armature 4 falls off the yoke 1 if the weakening is sufficient. The trigger armature 4 moves a coupling pin 7 and this a permanent magnet coupling, which consists of four permanent magnets 8a, 8b, 8c and 8d, an inner lever 9 carrying the permanent magnets 8b and 8c and an outer lever, not shown, carrying the permanent magnets 8a and 8d. In addition to the two permanent magnets 8a and 8d and the outer lever carrying them, all of the aforementioned components are located in a hermetically sealed housing 10 made of magnetically non-conductive material.

Figur 2 zeigt den Haltemagnetauslöser mit abgefallenem Auslöseanker 4. Bei richtiger Dimensionierung und Polung der Permanentmagnete 8a, 8b, 8c und 8d folgt der AuBenhebel mit geringem Schlupf jeder Drehung des Innenhebels 9. Die Bewegung des Außenhebels kann z. B. zum Auslösen des Schaltschlosses eines nicht gezeigten Fehterstrom-Schutzschalters herangezogen werden.FIG. 2 shows the holding magnet release with the release armature 4 fallen off. With the correct dimensioning and polarity of the permanent magnets 8a, 8b, 8c and 8d, the outer lever follows each rotation of the inner lever 9 with slight slippage. B. be used to trigger the switch lock of a fault current circuit breaker, not shown.

Für die Rückstellung des Haltemagnetauslösers wird der AuBenhebel gedreht, der Innenhebei 9 folgt mit geringem Schlupf und führt mit Hilfe des Kupplungsstiftes 7 den Auslöseanker 4 an das Joch 1 zurück, wobei die Auslösefeder 6 wieder gespannt wird.To reset the holding magnet release, the outer lever is turned, the inner lift 9 follows with a small amount of slip and guides the release armature 4 back to the yoke 1 with the aid of the coupling pin 7, the release spring 6 being tensioned again.

Zur Erreichung eines geringen Schlupfes in der Magnetkupplung werden die Spalte zwischen den Permanentmagneten 8a und 8b bzw. 8c und 8d durch eine zumindest in diesem Bereich dünnwandige undloder gewölbte Ausführung des Gehäuses 10 klein gehalten und eventuell Innensowie AuBenhebel als magnetischer Rückschluß für den Permanentfluß ausgebildet.In order to achieve a small slip in the magnetic coupling, the gaps between the permanent magnets 8a and 8b or 8c and 8d are kept small by an at least in this area thin-walled and / or curved design of the housing 10 and possibly the inside and outside lever are designed as a magnetic yoke for the permanent flux.

Die hermetische Dichtheit wird z. B. durch Zulöten eines zweiteiligen Gehäuses und eingelötete Glasdurchführungen 11 für die Erregerwicklung 2 vervollständigt.The hermetic seal is such. B. completed by soldering a two-part housing and soldered glass bushings 11 for the excitation winding 2.

Innerhalb des hermetisch dichten Gehäuses 10 kann sich Luft oder ein Schutzgas, wie Stickstoff oder eine Flüssigkeit, z. B. ein Siliconöl, befinden. Letzteres erweist sich als vorteilhaft, wenn eine größere Ansprechzeit des Haltemagnetauslösers gewünscht wird, etwa um die Empfindlichkeit eines Fehlerstrom-Schutzschalters gegenüber Stoßströmen zu reduzieren. Die Flüssigkeit wirkt in diesem Fall als Dämpfungsmedium. Eine weitere Möglichkeit ist die Evakuierung des hermetisch dichten Gehäuses 10.Inside the hermetically sealed housing 10, air or a protective gas such as nitrogen or a liquid, e.g. B. a silicone oil. The latter proves to be advantageous if a longer response time of the holding magnet release is desired, for example in order to reduce the sensitivity of a residual current circuit breaker to surge currents. In this case, the liquid acts as a damping medium. Another possibility is the evacuation of the hermetically sealed housing 10.

Durch die Anordnung der vier Permanentmagnete 8a, 8b, 8c und 8d, wie in Figur 1 und 2 gezeigt, wirken auf die Achsen des Innen- bzw. Außenhebels keine radialen Zugkräfte. Die Kupplungsteile sind auf einfache Weise ausbalanciert und damit die Permanentmagnetkupplung gegenüber Erschütterungen unempfindlich.The arrangement of the four permanent magnets 8a, 8b, 8c and 8d, as shown in FIGS. 1 and 2, means that no radial tensile forces act on the axes of the inner or outer lever. The coupling parts are easily balanced, making the permanent magnet coupling insensitive to vibrations.

Nimmt man eine radiale Zugkraft und die damit verbundenen Reibungsverluste in Kauf, so können zwei Permanentmagnete, z. B. die Permanentmagnete 8a und 8b, entfallen.If you accept a radial pulling force and the associated friction losses, two permanent magnets, e.g. B. the permanent magnets 8a and 8b, omitted.

Es ist auch möglich, mit einem einzigen Permanentmagnet auszukommen, wenn diesem ein magnetisch leitfähiger Teil, wie z. B. Weicheisen, gegenübergestellt wird. Der zu erwartende erhöhte Schlupf einer solchen Kupplung kann durch verbesserte Rückführung des Permanentflusses wieder reduziert werden. Als weitere Ausführungsform für die Permanentmagnetkupplung kommt eine Ausführung mit zwei Permanentmagneten in Frage, denen zwei Weicheisenteile gegenüberstehen, wodurch wieder keine radialen Zugkräfte auftreten.It is also possible to get by with a single permanent magnet if this has a magnetically conductive part, such as. B. soft iron, is compared. The expected increased slip of such a clutch can be reduced again by improved feedback of the permanent flow. As a further embodiment for the permanent magnet coupling, an embodiment with two permanent magnets comes into question, which are opposed by two soft iron parts, as a result of which no radial tensile forces occur again.

Der Aufbau des erfindungsgemäßen, hermetisch dichten Haltemagnetauslösers mit Permanentmagnekupplung kann gegenüber der in den Figuren 1 und 2 dargestellten Ausführungsform noch vereinfacht werden, indem auf den Kupplungsstift 7 verzichtet und der Ankerhebel 5 so umgestaltet wird, daß er auch die Funktion des Innenhebels 9 der gezeigten Ausführungsform übernimmt. Bei dieser Ausführungsform trägt der beispielsweise als gleicharmiger Hebel ausgebildete Ankerhebel 5 an einem oder beiden seiner Enden Permanentmagnete, denen außerhalb des Gehäuses die am nicht gezeigten Außenhebel angeordneten Permanentmagnete oder Weicheisenteile gegenüberstehen. Es ist aber auch eine Ausführungsform denkbar, bei welcher der Ankerhebel 5 an einem oder beiden seiner Enden einen Weicheisenteil trägt, dem die außerhalb des Gehäuses 10 liegenden Magnete des Außenhebels gegenüberliegen.The structure of the hermetically sealed holding magnet release with permanent magnetic coupling according to the invention can be simplified compared to the embodiment shown in Figures 1 and 2 by dispensing with the coupling pin 7 and the armature lever 5 is redesigned so that it also functions as the inner lever 9 of the embodiment shown takes over. In this embodiment, the armature lever 5, which is designed, for example, as an equal arm, carries permanent magnets at one or both of its ends, which are opposed by the permanent magnets or soft iron parts arranged on the outer lever (not shown) outside the housing. However, an embodiment is also conceivable in which the armature lever 5 carries a soft iron part at one or both of its ends, which the magnets of the outer lever lying outside the housing 10 lie opposite.

Claims (4)

1. Holding magnet tripping device for earth- leakage circuit breakers in which the yoke body (1), permanent magnet (3), tripping armature (4), excitation coil (2) and tripping spring (6) are provided in a hermetically sealed, in particular evacuated housing (10) filled with a protective gas such as nitrogen or a liquid such as silicon oil and in which the conductors for the excitation coil (2) are sealingly guided into the interior of the housing (10) characterised in that the tripping armature (4) is coupled by at least one permanent magnetic coupling with an outer lever arranged externally of the housing (10) for carrying out movements in the same direction and that one half (8b, 8c) of the permanent magnetic coupling arranged in the interior of the housing (10) is provided on a lever pivotally mounted in the interior of the housing (10), which lever is either an armature lever (5) carrying the tripping armature (4) or an internal lever (9) coupled to the tripping armature (4).
2. Holding magnet tripping device according to claim 1, characterised in that the coupling between the tripping armature (4) and the internal lever (9) is effected by means of a coupling pin (7) displaceably guided in the housing (10).
3. Holding magnet tripping device according to claim 1 or 2. characterised in that the armature lever (5) or the internal lever (9) is symmetrically constructed having regard to its bearing point in the housing (10) and carries at both ends permanent magnets (8b, 8c) or magnetically conductive bodies, for example of soft iron, whereby the outer lever carries two magnetically conductive bodies e. g. of soft iron or two permanent magnets (8a, 8d).
4. Holding magnet tripping device according to one of claims 1 to 3, characterised in that the inner lever (9) and the outer lever are constructed as magnetic short circuit for the permanent magnetic flux.
EP19840890014 1983-01-20 1984-01-18 Trip device with holding magnet Expired EP0118413B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT18183A AT378443B (en) 1983-01-20 1983-01-20 HOLDING MAGNETIC RELEASE
AT181/83 1983-01-20

Publications (2)

Publication Number Publication Date
EP0118413A1 EP0118413A1 (en) 1984-09-12
EP0118413B1 true EP0118413B1 (en) 1986-07-30

Family

ID=3483654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840890014 Expired EP0118413B1 (en) 1983-01-20 1984-01-18 Trip device with holding magnet

Country Status (5)

Country Link
EP (1) EP0118413B1 (en)
AT (1) AT378443B (en)
AU (1) AU566689B2 (en)
DE (1) DE3460357D1 (en)
ES (1) ES529439A0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4405868A1 (en) * 1994-02-23 1995-08-24 Abb Patent Gmbh Differential overcurrent protection switch with controlled heater
CH690345A5 (en) * 1996-06-05 2000-07-31 Wen Fong Lee Sealed electric switch assembly, especially for power switching
DE19628977B4 (en) * 1996-07-18 2004-02-19 Schupa Gmbh Tripping relay for residual current circuit breakers
DE19629152A1 (en) * 1996-07-19 1998-01-22 Schupa Elektro Gmbh & Co Kg Hermetically sealed releasing relay for fault current circuit- breaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH456769A (en) * 1966-09-22 1968-07-31 Landis & Gyr Ag Electromagnetic trip relay
DE7813109U1 (en) * 1976-12-16 1979-05-31 Fong, Lee Wen, Taichung (China/ Taiwan) Magnetic switch
DE7928436U1 (en) * 1979-10-06 1980-01-10 Felten & Guilleaume Carlswerk Ag, 5000 Koeln Hermetically sealed permanent magnetic release for residual current circuit breaker

Also Published As

Publication number Publication date
AT378443B (en) 1985-08-12
ES8502571A1 (en) 1985-01-01
DE3460357D1 (en) 1986-09-04
ATA18183A (en) 1984-12-15
EP0118413A1 (en) 1984-09-12
AU2362684A (en) 1984-07-26
ES529439A0 (en) 1985-01-01
AU566689B2 (en) 1987-10-29

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