EP0829896B1 - Magnetic trip device, in particular for a fault current circuit breaker - Google Patents

Magnetic trip device, in particular for a fault current circuit breaker Download PDF

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Publication number
EP0829896B1
EP0829896B1 EP97810591A EP97810591A EP0829896B1 EP 0829896 B1 EP0829896 B1 EP 0829896B1 EP 97810591 A EP97810591 A EP 97810591A EP 97810591 A EP97810591 A EP 97810591A EP 0829896 B1 EP0829896 B1 EP 0829896B1
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EP
European Patent Office
Prior art keywords
magnetic release
magnetic
release according
armature
spring
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.)
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EP97810591A
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German (de)
French (fr)
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EP0829896A2 (en
EP0829896A3 (en
Inventor
Dominique Girardin
Siegfried Mayer
Siegfried Münzer
Gerhard Schneider
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ABB Schweiz AG
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ABB Schweiz AG
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/24Electromagnetic mechanisms
    • H01H71/32Electromagnetic mechanisms having permanently magnetised part

Definitions

  • the invention is based on a magnetic release, in particular for a fault current circuit breaker (RCCB), according to the preamble of claim 1.
  • a magnetic release has a magnetic powered by a permanent magnet Circle with a U-shaped yoke and with a in the closed state of the magnetic circuit, the ends of the U bridging hinged anchor on.
  • a trigger size When a trigger size occurs, about a fault current, will be in one of the two Leg of U plugged trip coil fed a signal.
  • This signal generates a magnetic in the trip coil Flow, which the magnetic generated by permanent magnets Continuous flow at the anchor weakens.
  • the one of a toughened Spring loaded anchor will weaken the magnetic Permanent flow lifted from the yoke and around a bearing axis pivoted.
  • a switch lock For a FI switch this acts Plunger on a switch lock, which opening a contact arrangement of the FI-switch.
  • the invention takes on a state of the art of magnetic triggers for FI switch reference, as in DE-A1-38 38 444 is described.
  • the anchor With this magnetic release, the anchor is at the connecting web attached to a U-shaped leaf spring, whose legs are mounted on an anchor bearing.
  • a prestressed tension spring anchor When triggered reaches the loaded by a prestressed tension spring anchor after a very short way a bearing edge of the anchor bearing and tilts then around this edge of the camp.
  • This magnetic release needs beside the tension force generating tension spring additionally a relatively complicated trained leaf spring.
  • a magnetic release described in DE-A1-41 11 092 has a rotatably mounted by means of an anchor bracket shaft and with a preloaded tension spring loaded anchor.
  • the wave has a caulked rectangular anchor in the anchor and is guided in two lateral guides of an anchor holder.
  • This Magnetic release requires in addition to the preloaded tension spring additionally the shaft and the armature and the shaft frictionally coupling spine.
  • the object is based, a magnetic release, in particular for a residual current circuit breaker of the type mentioned above, which is characterized by simple construction and the lowest possible Number of components distinguishes.
  • the magnetic release of the invention are by use a tortuous spiral spring and by arranging the winding axis this spiral spring on the extension of a to pivot the Ankers needed tilting edge parts, like an extra spring or like rotatable bearing brackets, saved.
  • the Spiral spiral spring stands for power for a force-transmitting Tappet available and can at the same time to reload the Magnetic release after a tripping operation required recharging energy be effectively damped.
  • the forms Spiral spiral spring however a bearing hinge for the anchor and positions the anchor using a simple mount at the same time extremely effective.
  • the anchor can then also one have a simple shape with evenly distributed mass. This will give a good shock resistance and good Adjustment bandwidth of the magnetic release according to the invention reached.
  • the tilting edge by a magnetically insulating spacing of the two Yoke plates anyway needed bolts can be formed omitted in a equipped with such a yoke Magnetic release an additional component for the tilting edge.
  • a defined air gap can be set, which the Use of an otherwise usually between the two yoke plates used disc-shaped diaphragm dispensable power.
  • Magnetic release comprises a trough-shaped bottom 1 and a lid 2 existing insulating material.
  • a lid 2 existing insulating material.
  • an opening 3 is provided, which is the vertical guide a cylindrical ram 4 is used.
  • the plunger 4 has a thickened lower end on which is on a cuboid formed armature 5 of a magnetic circuit is seated. The upwardly directed end of the plunger 4 does not act on a illustrated switching lock on a contact arrangement of a not shown FI-switch.
  • the magnetic circuit further comprises a two sheets 7, 8 containing, U-shaped yoke 9 on.
  • the two yoke plates are using a non-magnetic material, for example a nickel alloy, existing bolt 10 about by Welding at a distance of typically 50 to 100 microns fixed to each other.
  • Welding By additional magnetically non-conductive Welding, soldering or gluing can improve the mechanical stability of the yoke 9 are increased.
  • the educated by the distance Air gap assumes the function of an otherwise usual used, foil-shaped diaphragms.
  • the two yoke plates 7, 8 are each angled such that the yoke 9 in the region of the bend has V-shape.
  • a prismatoid shaped Permanent magnet 11 arranged with flat pole faces.
  • the two Pole surface are each on one of the two legs of the V at.
  • the permanent magnet 11 automatically and without additional aids positioned in the correct position.
  • the Magnet 11 can in this case triangular or trapezoidal base not having the base of the triangle or trapezium necessarily straightforward, but possibly also curved, for example, can be formed circular arc. In any case, however, the side surfaces of the triangle or the Trapezes associated with the pole faces of the magnet.
  • the reference numeral 12 is an intermediate floor of insulating material designated.
  • This intermediate floor has two on its top mutually parallel webs 13, 14. Between two webs is an undefined opening and a also not designated material recess provided which the implementation of the end portions of the yoke in the 9th containing U serve.
  • On one of the yoke 7 formed Leg 15 of the U is one of an electrical signal excitable trip coil 16 plugged. This trip coil comes with Assistance of two power connections 17 led through the floor 1 supplied with electrical power, which occurs when a Fault current is formed in a summation current transformer.
  • the reference numeral 18 is a executed as a double spring Designated spring element.
  • This spring element 18 contains two cylindrical, mirror-symmetrically arranged coil springs 19, 20 with typically up to 10 turns each. As below is described, the double spring is subjected to bending. Therefore, other than the coil springs Winding bending springs, such as coil springs, are used.
  • a double spring can also be a simple meandering Biegefeder as a spring element 18 in the magnetic release of the Invention can be used.
  • Each spring 19 and 20 is in one Material recess 21 and 22 mounted, which in the web 13th or 14 is formed. The spring element 18 loads the armature 5 before triggering the magnetic release with a biasing force.
  • FIG wound spiral spring 19 has two legs 24, 25, of which the leg 24 fixed in the material recess 21 of the Stegs 13 is held and - in particular Figures 2 and 3 can be removed - the leg 25 out with a parellel to the winding axis Section 26 in a groove 27 designed as the holder Ankers 5 is stored.
  • a particularly symmetrical and therefore force-free storage of Anchor 5 is reached when the spring element 18 instead of a Spiral spiral spring the two of Fig.1 apparent in a Double spring integrated winding bending springs 19 and 20 has. These two springs are formed in opposite directions wound and mirror-symmetrical in the material recesses 21, 22nd arranged. The parallel to the winding axis aligned portions of the anchor 5 acting legs of these springs are part of a from Fig.3 apparent and held in the groove 27 connecting web 28th
  • a particularly safe storage of the two spiral bending springs 19, 20 is achieved when each as a cylindrical coil spring are formed and each on an axially guided stationary bearing bolts are held.
  • Such a bearing pin can in the two spiral bending springs 19, 20 holding Be intermediate 12 molded.
  • Figure 4 is such a the wound bending spring 19 bearing bolt with the reference numeral 29th designated.
  • leg 25 it is advantageous to attach the leg 25 in Ankertician because then its axially directed portion 26 is formed short and at the same time unwanted radial and axial forces from the Spring are largely kept away.
  • a particularly safe Power transmission of the springs 19, 20 is ensured when the two legs of the springs 19, 20 each tangent to to set their turns. At the same time, such a spring can be very easy to manufacture.
  • the leg 24 radially to the windings to be set.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

A magnetic release or trip includes a magnetic circuit fed by a permanent magnet (11) and containing a U-shaped yoke (9) and an armature (5) bridging the ends of the 'U' of the yoke in the closed state of the magnetic circuit; also included is a pre-tensioned spring element for biasing the armature against the force of the permanent magnet. At least one coil-spring (19,20) of the spring element (18) has a winding axis aligned in the extension of the tilting edge (23) for hinge-mounting of the armature and including two limbs (24,25), the first (24) being held stationary and the second (25) being mounted in a retainer of the armature (5).

Description

TECHNISCHES GEBIETTECHNICAL AREA

Bei der Erfindung wird ausgegangen von einem Magnetauslöser, insbesondere für einen Fehlerstromschutzschalter (FI-Schalter), nach dem Oberbegriff von Patentanspruch 1. Ein solcher Magnetauslöser weist einen von einem Permanentmagneten gespeisten magnetischen Kreis mit einem U-förmig ausgebildeten Joch und mit einem im geschlossenen Zustand des magnetischen Kreises die Enden des U überbrückenden Klappanker auf. Beim Auftreten einer Auslösegrösse, etwa eines Fehlerstroms, wird in eine auf einen der beiden Schenkel des U gesteckte Auslösespule ein Signal eingespeist. Dieses Signal erzeugt in der Auslösespule einen magnetischen Fluss, welcher den von Permanentmagneten erzeugten magnetischen Dauerfluss am Ort des Ankers schwächt. Der von einer vorgespannten Feder belastete Anker wird bei der Schwächung des magnetischen Dauerflusses vom Joch abgehoben und um eine Lagerachse geschwenkt. Hierbei löst er einen Stössel zur mechanischen Betätigung eines Gerätes aus. Bei einem FI-Schalter wirkt dieser Stössel auf ein Schaltschloss, welcher das Öffnen einer Kontaktanordnung des FI-Schalters veranlasst.The invention is based on a magnetic release, in particular for a fault current circuit breaker (RCCB), according to the preamble of claim 1. Such a magnetic release has a magnetic powered by a permanent magnet Circle with a U-shaped yoke and with a in the closed state of the magnetic circuit, the ends of the U bridging hinged anchor on. When a trigger size occurs, about a fault current, will be in one of the two Leg of U plugged trip coil fed a signal. This signal generates a magnetic in the trip coil Flow, which the magnetic generated by permanent magnets Continuous flow at the anchor weakens. The one of a toughened Spring loaded anchor will weaken the magnetic Permanent flow lifted from the yoke and around a bearing axis pivoted. Here he releases a plunger for mechanical Actuation of a device. For a FI switch this acts Plunger on a switch lock, which opening a contact arrangement of the FI-switch.

STAND DER TECHNIKSTATE OF THE ART

Die Erfindung nimmt auf einen Stand der Technik von Magnetauslösern für FI-Schalter Bezug, wie er etwa in DE-A1-38 38 444 beschrieben ist. Bei diesem Magnetauslöser ist der Anker am Verbindungssteg einer U-förmig ausgebildeten Blattfeder befestigt, deren Schenkel auf einem Ankerlager gehaltert sind. Beim Auslösen erreicht der durch eine vorgespannte Zugfeder belastete Anker nach sehr kurzem Weg eine Lagerkante des Ankerlagers und kippt dann um diese Lagerkante ab. Dieser Magnetauslöser benötigt neben der die Vorspannkraft erzeugenden Zugfeder zusätzlich eine relativ kompliziert ausgebildete Blattfeder.The invention takes on a state of the art of magnetic triggers for FI switch reference, as in DE-A1-38 38 444 is described. With this magnetic release, the anchor is at the connecting web attached to a U-shaped leaf spring, whose legs are mounted on an anchor bearing. When triggered reaches the loaded by a prestressed tension spring anchor after a very short way a bearing edge of the anchor bearing and tilts then around this edge of the camp. This magnetic release needs beside the tension force generating tension spring additionally a relatively complicated trained leaf spring.

Ein in DE-A1-41 11 092 beschriebener Magnetauslöser weist einen mittels einer Ankerhalterungswelle drehbar gelagerten und mit einer vorgespannten Zugfeder belasteten Anker auf. Die Welle verfügt über einen im Anker verstemmten rechteckigen Dorn und ist in zwei seitlichen Führungen eines Ankerhalters geführt. Dieser Magnetauslöser benötigt neben der vorgespannten Zugfeder zusätzlich die Welle und den den Anker und die Welle kraftschlüssig koppelnden Dorn.A magnetic release described in DE-A1-41 11 092 has a rotatably mounted by means of an anchor bracket shaft and with a preloaded tension spring loaded anchor. The wave has a caulked rectangular anchor in the anchor and is guided in two lateral guides of an anchor holder. This Magnetic release requires in addition to the preloaded tension spring additionally the shaft and the armature and the shaft frictionally coupling spine.

KURZE DARSTELLUNG DER ERFINDUNGBRIEF SUMMARY OF THE INVENTION

Der Erfindung, wie sie in den Patentansprüchen angegeben ist, liegt die Aufgabe zugrunde, einen Magnetauslöser, insbesondere für einen FI-Schalter, der eingangs genannten Art zu schaffen, welcher sich durch einfachen Aufbau und eine möglichst geringe Anzahl an Bauteilen auszeichnet.The invention as stated in the patent claims the object is based, a magnetic release, in particular for a residual current circuit breaker of the type mentioned above, which is characterized by simple construction and the lowest possible Number of components distinguishes.

Beim Magnetauslöser nach der Erfindung werden durch Verwendung einer gewundenen Biegefeder und durch Anordnung der Windungsachse dieser Biegefeder auf der Verlängerung einer zum Schwenken des Ankers benötigten Kippkante Teile, wie eine zusätzliche Feder oder wie drehbare Lagerhalterungen, eingespart. Durch Einsatz der gewundenen Biegefeder steht Kraft für einen kraftübertragenden Stössel zur Verfügung und kann zugleich die zur Wiederladung des Magnetauslösers nach einem Auslösevorgang benötigte Wiederladeenergie wirkungsvoll gedämpft werden. Vor allem bildet die gewundene Biegefeder jedoch ein Lagerscharnier für den Anker und positioniert den Anker mit Hilfe einer einfachen Halterung zugleich äusserst wirksam. Der Anker kann dann zudem eine einfache Form mit gleichmässig verteilter Masse aufweisen. Hierdurch werden eine gute Erschütterungsfestigkeit und eine gute Einstellbandbreite des Magnetauslösers nach der Erfindung erreicht.The magnetic release of the invention are by use a tortuous spiral spring and by arranging the winding axis this spiral spring on the extension of a to pivot the Ankers needed tilting edge parts, like an extra spring or like rotatable bearing brackets, saved. By using the Spiral spiral spring stands for power for a force-transmitting Tappet available and can at the same time to reload the Magnetic release after a tripping operation required recharging energy be effectively damped. Above all, the forms Spiral spiral spring however a bearing hinge for the anchor and positions the anchor using a simple mount at the same time extremely effective. The anchor can then also one have a simple shape with evenly distributed mass. This will give a good shock resistance and good Adjustment bandwidth of the magnetic release according to the invention reached.

Da bei einem aus zwei Blechen gefertigten Joch die Kippkante durch einen zur magnetisch isolierenden Beabstandung der beiden Jochbleche sowieso benötigten Bolzen gebildet werden kann, entfällt bei einem mit einem derartigen Joch ausgerüsteten Magnetauslöser ein zusätzliches Bauelement für die Kippkante. Zugleich kann dann durch den Bolzen zwischen den beiden Jochblechen ein definierter Luftspalt eingestellt werden, der die Verwendung eines sonst üblicherweise zwischen den beiden Jochblechen eingesetzten scheibenförmigen Diaphragmas entbehrlich macht.As with a yoke made of two sheets, the tilting edge by a magnetically insulating spacing of the two Yoke plates anyway needed bolts can be formed omitted in a equipped with such a yoke Magnetic release an additional component for the tilting edge. At the same time can then by the bolt between the two yoke plates a defined air gap can be set, which the Use of an otherwise usually between the two yoke plates used disc-shaped diaphragm dispensable power.

Eine zusätzliche Vereinfachung des Magnetauslösers nach der Erfindung wird dadurch erreicht, dass die beiden Jochbleche V-förmig abgewinkelt sind, und dass der Permanentmagnet als Prismatoid mit ebenen Polflächen geformt ist und mit seinen Polflächen jeweils an je einem der beiden Schenkel des V anliegt. Der Permanentmagnet positioniert sich dann nach Einbau in den Magnetauslöser selbsttätig, da er durch die Wirkung des im magnetischen Kreises geführten Dauerflusses an die Schenkel des V gepresst wird. Nicht zu vermeidende Luftspalte zwischen den Polflächen des Magneten und den zugeordneten Gegenflächen des Jochs werden so erheblich reduziert. Daher wird die Einkoppelung des magnetischen Dauerflusses in das Joch wesentlich verbessert. Zugleich wird der unerwünschte magnetische Streufluss äusserst gering gehalten. Eine Fixierung des Permanentmagneten entfällt, da sich der Magnet selbsttätig im V in die richtigen Position bringt. Zudem ist nun die Vorzugsrichtung des Magneten leicht zu erkennen und kann der Magnet isotrop oder anisotrop ausgeführt sein. An additional simplification of the magnetic release after the Invention is achieved in that the two yoke plates V-shaped are angled, and that the permanent magnet as Prismatoid is formed with flat pole faces and with its Pole surfaces each on one of the two legs of the V is applied. The permanent magnet then positions itself after installation in the Magnetic release automatically, since it is affected by the effect of the magnetic circuit guided continuous flow to the legs of the V is pressed. Unavoidable air gaps between the Pole faces of the magnet and the associated mating surfaces of the Yokes are so significantly reduced. Therefore, the coupling becomes the magnetic permanent flux in the yoke significantly improved. At the same time the unwanted magnetic leakage flux is extremely kept low. A fixation of the permanent magnet is eliminated because the magnet is automatically in the V in the correct position brings. In addition, the preferred direction of the magnet is now too easy recognize and the magnet can be made isotropic or anisotropic be.

KURZE BESCHREIBUNG DER ZEICHNUNGBRIEF DESCRIPTION OF THE DRAWING

Ein bevorzugtes Ausführungsbeispiel der Erfindung und die damit erzielbaren weiteren Vorteile werden nachfolgend anhand von Zeichnungen näher erläutert. Hierbei zeigt:

Fig.1
eine Explosionsdarstellung einer bevorzugten Ausführungsform des Magnetauslösers nach der Erfindung,
Fig.2
eine perspektivische Ansicht des Magnetauslösers gemäss Fig.1 nach dem Entfernen eines Teils seines Gehäuses vor einem Auslösevorgang,
Fig.3
eine etwas veränderte perspektivische Ansicht des Magnetauslösers gemäss Fig.2 nach einem Auslösevorgang, und
Fig.4
eine in Richtung der Windungsachse einer gewundenen Biegefeder ausgeführte Ansicht des Magnetauslösers gemäss Fig.2 nach vollständigem Entfernen seines Gehäuses.
A preferred embodiment of the invention and the advantages that can be achieved thereby are explained in more detail below with reference to drawings. Hereby shows:
Fig.1
an exploded view of a preferred embodiment of the magnetic release according to the invention,
Fig.2
a perspective view of the magnetic release according to Figure 1 after removing a part of its housing before a tripping operation
Figure 3
a slightly different perspective view of the magnetic release according to Figure 2 after a tripping operation, and
Figure 4
a executed in the direction of the winding axis of a tortuous spiral spring view of the magnetic release according to Figure 2 after complete removal of its housing.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

In allen Figuren beziehen sich gleiche Bezugszeichen auf gleichwirkende Teile. Der in Fig.1 in Explosionsdarstellung gezeigte Magnetauslöser weist ein aus einem wannenförmigen Boden 1 und einem Deckel 2 bestehendes Isolierstoffgehäuse auf. Im Deckel 2 ist eine Öffnung 3 vorgesehen, welche der vertikalen Führung eines zylinderförmigen Stössels 4 dient. Der Stössel 4 weist ein verdicktes unteres Ende auf, welches auf einem quaderförmig ausgebildeten Anker 5 eines magnetischen Kreises aufsitzt. Das nach oben gerichtete Ende des Stössels 4 wirkt über ein nicht dargestelltes Schaltschloss auf eine Kontaktanordnung eines nicht dargestellten FI-Schalters. In all figures, like reference numerals refer to the same effect Parts. The exploded view in Fig.1 Magnetic release comprises a trough-shaped bottom 1 and a lid 2 existing insulating material. In the lid 2 an opening 3 is provided, which is the vertical guide a cylindrical ram 4 is used. The plunger 4 has a thickened lower end on which is on a cuboid formed armature 5 of a magnetic circuit is seated. The upwardly directed end of the plunger 4 does not act on a illustrated switching lock on a contact arrangement of a not shown FI-switch.

Der magnetische Kreis weist ferner ein zwei Bleche 7, 8 enthaltendes, U-förmig ausgebildetes Joch 9 auf. Die beiden Jochbleche sind mit Hilfe eines aus nichtmagnetischem Material, beispielsweise einer Nickellegierung, bestehenden Bolzens 10 etwa durch Schweissen in einem Abstand von typischerweise 50 bis 100 µm zueinander fixiert. Durch zusätzliche magnetisch nichtleitende Schweiss- Löt- oder Klebstelle kann die mechanische Stabilität des Jochs 9 erhöht werden. Der durch den Abstand gebildete Luftspalt übernimmt die Funktion eines sonst üblicherweise verwendeten, folienförmig ausgebildeten Diaphragmas.The magnetic circuit further comprises a two sheets 7, 8 containing, U-shaped yoke 9 on. The two yoke plates are using a non-magnetic material, for example a nickel alloy, existing bolt 10 about by Welding at a distance of typically 50 to 100 microns fixed to each other. By additional magnetically non-conductive Welding, soldering or gluing can improve the mechanical stability of the yoke 9 are increased. The educated by the distance Air gap assumes the function of an otherwise usual used, foil-shaped diaphragms.

Die beiden Jochbleche 7, 8 sind jeweils derart abgewinkelt, dass das Joch 9 im Bereich der Abwinkelung V-Form aufweist. Zwischen den beiden Schenkeln des V ist ein als Prismatoid geformter Permanentmagnet 11 mit ebenen Polflächen angeordnet. Die beiden Polfläche liegen jeweils an je einem der beiden Schenkel des V an. Eine solche Anordnung zeichnet sich dadurch aus, dass zum einen der magnetische Dauerfluss besonders gut und ohne wesentliche Streuverluste ins Joch 9 eingekoppelt wird, und dass sich zum anderen der Permanentmagnet 11 selbsttätig und ohne zusätzliche Hilfsmittel in die richtigen Lage positioniert. Der Magnet 11 kann hierbei dreieckige oder trapezförmige Grundfläche aufweisen, wobei die Basis des Dreiecks oder Trapezes nicht notwendigerweise geradlinig, sondern gegebenenfalls auch gekrümmt, beispielsweise kreisbogenförmig ausgebildet sein kann. In jedem Fall sind jedoch die Seitenflächen des Dreiecks bzw. des Trapezes den Polflächen des Magneten zugeordnet.The two yoke plates 7, 8 are each angled such that the yoke 9 in the region of the bend has V-shape. Between the two legs of the V is a prismatoid shaped Permanent magnet 11 arranged with flat pole faces. The two Pole surface are each on one of the two legs of the V at. Such an arrangement is characterized in that the one of the magnetic continuous flow especially good and without significant leakage losses in the yoke 9 is coupled, and that on the other hand, the permanent magnet 11 automatically and without additional aids positioned in the correct position. Of the Magnet 11 can in this case triangular or trapezoidal base not having the base of the triangle or trapezium necessarily straightforward, but possibly also curved, for example, can be formed circular arc. In any case, however, the side surfaces of the triangle or the Trapezes associated with the pole faces of the magnet.

Mit dem Bezugszeichen 12 ist ein Zwischenboden aus Isolierstoff bezeichnet. Dieser Zwischenboden weist auf seiner Oberseite zwei zueinander parallel verlaufende Stege 13, 14 auf. Zwischen den beiden Stegen ist eine nicht bezeichnete Öffnung sowie eine ebenfalls nicht bezeichnete Materialaussparung vorgesehen, welcher der Durchführung der Endabschnitte des im Joch 9 enthaltenden U dienen. Auf einem vom Jochblech 7 gebildeten Schenkel 15 des U ist eine von einem elektrischen Signal erregbare Auslösespule 16 gesteckt. Diese Auslösespule wird mit Hilfe von zwei durch den Boden 1 geführten Stromanschlüssen 17 mit elektrischer Leistung versorgt, welche beim Auftreten eines Fehlerstroms in einem Summenstromwandler gebildet wird.The reference numeral 12 is an intermediate floor of insulating material designated. This intermediate floor has two on its top mutually parallel webs 13, 14. Between two webs is an undefined opening and a also not designated material recess provided which the implementation of the end portions of the yoke in the 9th containing U serve. On one of the yoke 7 formed Leg 15 of the U is one of an electrical signal excitable trip coil 16 plugged. This trip coil comes with Assistance of two power connections 17 led through the floor 1 supplied with electrical power, which occurs when a Fault current is formed in a summation current transformer.

Mit dem Bezugszeichen 18 ist ein als Doppelfeder ausgeführtes Federelement bezeichnet. Dieses Federelement 18 enthält zwei zylindrische, spiegelsymmetrisch angeordnete Schraubenfedern 19, 20 mit typischerweise jeweils bis zu 10 Windungen. Wie nachfolgend beschrieben ist, wird die Doppelfeder auf Biegung beansprucht. Anstelle der Schraubenfedern können daher auch andere gewundene Biegefedern, etwa Spiralfedern, verwendet werden. Anstelle einer Doppelfeder kann auch eine einfache gewundene Biegefeder als Federelement 18 im Magnetauslöser nach der Erfindung eingesetzt werden. Jede Feder 19 bzw. 20 ist in einer Materialausnehmung 21 bzw. 22 gelagert, welche in den Steg 13 bzw. 14 eingeformt ist. Das Federelement 18 belastet den Anker 5 vor dem Auslösen des Magnetauslösers mit eine Vorspannkraft.The reference numeral 18 is a executed as a double spring Designated spring element. This spring element 18 contains two cylindrical, mirror-symmetrically arranged coil springs 19, 20 with typically up to 10 turns each. As below is described, the double spring is subjected to bending. Therefore, other than the coil springs Winding bending springs, such as coil springs, are used. Instead of a double spring can also be a simple meandering Biegefeder as a spring element 18 in the magnetic release of the Invention can be used. Each spring 19 and 20 is in one Material recess 21 and 22 mounted, which in the web 13th or 14 is formed. The spring element 18 loads the armature 5 before triggering the magnetic release with a biasing force.

Wie aus den Figuren 2 und 4 entnommen werden kann, liegt der Anker 5 vor dem Auslösen des Magnetauslösers auf den Enden des U auf und ist der Anker 5 dann durch das Federelement 18 mit einer Vorspannkraft belastet. Der magnetische Kreis ist dann geschlossen und der magnetische Dauerfluss wird von Permanentmagneten 11 beispielsweise über das Jochblech 7, den Schenkel 15 des Blechs 7, den Anker 5 und das Jochblech 8 (Fig.1) zurück zum Permanentmagneten geführt. Beim Auftreten eines Fehlerstroms schwächt das magnetische Feld eines in die Auslösespule 16 eingespeisten Stromsignals das Feld des magnetischen Kreises im Bereich des Ankers 5. Der Anker 5 wird unter Wirkung des Federelements 18 gekippt und führt - wie aus Fig.3 ersichtlich ist - den Stössel nach oben, welcher sodann durch Aufschlagen auf das nicht dargestellte Schaltschloss ein Ausschalten des FI-Schutzschalters bewirkt. As can be seen from Figures 2 and 4, is the Anchor 5 before triggering the magnetic release on the ends of the U on and the armature 5 is then by the spring element 18 with a Preload loaded. The magnetic circuit is then closed and the permanent magnetic flux is from permanent magnets 11 for example via the yoke 7, the legs 15 of the sheet 7, the armature 5 and the yoke 8 (Fig.1) back to Permanent magnet out. When a fault current occurs weakens the magnetic field of one in the trip coil 16th fed current signal the field of the magnetic circuit in Area of the armature 5. The armature 5 is under the effect of Spring element 18 is tilted and leads - as shown in Figure 3 can be seen is - the plunger upwards, which then by striking on the switching mechanism, not shown, a switching off the RCCB causes.

Aus den Figuren 2 und 4 ist ersichtlich, dass der Anker 5 auf einer vom Bolzen 10 gebildeten Kippkante 23 schwenkbar gelagert ist, und dass zumindest die Windungsachse der gewundenen Biegefeder 19 in Verlängerung der Kippkante 23 ausgerichtet ist. Ferner ist aus diesen Figuren und Fig.3 ersichtlich, dass die gewundene Biegefeder 19 zwei Schenkeln 24, 25 aufweist, von denen der Schenkel 24 feststehend in der Materialausnehmung 21 des Stegs 13 gehalten ist und - wie insbesondere den Figuren 2 und 3 entnommen werden kann - der Schenkel 25 mit einem parellel zur Windungsachse geführten Abschnitt 26 in einer als Nut 27 ausgeführten Halterung des Ankers 5 gelagert ist. In dem aus Fig.2 entnehmbaren Zustand des Magnetauslösers vor dem Auslösen ist die ersichtlich im Gegenuhrzeigersinn aus der Zeichenebene heraus gewundene Biegefeder 19 im Windungssinn gespannt, so dass die Aussenflächen der Windungen auf Zug beansprucht sind und die beiden Schenkel 24 und 25 nach unten drücken. Hierdurch wird der Schenkel 24 auf einer Wand der Materialausnehmung 21 fixiert und wirkt der Schenkel 25 mit einem Drehmoment auf den Anker 5.From Figures 2 and 4 it can be seen that the armature 5 on a tilting edge 23 formed by the bolt 10 is pivotally mounted is, and that at least the winding axis of the tortuous Biegefeder 19 in extension of the tilting edge 23 is aligned. Furthermore, it can be seen from these figures and FIG wound spiral spring 19 has two legs 24, 25, of which the leg 24 fixed in the material recess 21 of the Stegs 13 is held and - in particular Figures 2 and 3 can be removed - the leg 25 out with a parellel to the winding axis Section 26 in a groove 27 designed as the holder Ankers 5 is stored. In the removable from Fig.2 state of Magnetic release before triggering is visible in the counterclockwise direction out of the plane spiraled spiral spring 19 im Winding sense stretched, so that the outer surfaces of the turns are claimed to train and the two legs 24 and 25 after press down. As a result, the leg 24 on a wall of the Material recess 21 fixed and the leg 25 acts with a Torque on the anchor 5.

Beim Auslösen wird dann der Anker 5 im Gegenuhrzeigersinn um die Kippkante 23 gekippt und hierbei der Stössel 4 nach oben aus dem Gehäuse geführt bis der aus Fig.3 ersichtliche Zustand des Magnetauslösers erreicht ist. Da die Windungsachse der gewundenen Biegefeder 19 in Verlängerung der Kippkante 23 ausgerichtet ist, und da die gewundene Biegefeder mit ihrem Schenkel 24 in der Materialausnehmung 21 fixiert und der Anker 5 zugleich am parallel zur Windungsachse geführten Abschnitt 26 des Schenkels 24 gehaltert ist, wirkt die gewundene Biegefeder 19 als Lagerscharnier für den Anker 5. Ein unerwünschtes Gleiten des Ankers 5 auf der Kippkante 23 beim Auslösen und beim Wiederladen des Magnetauslösers wird so weitgehend vermieden. Da die gewundene Biegefeder 19 nicht nur der Lagerung und Halterung des Ankers dient, sondern zugleich auch Kraft für den Stössel 4 erzeugt und beim Wiederladen die von aussen mechanisch zugeführte Wiederladeenergie dämpft, können beim Magnetauslöser Teile, wie zusätzliche Federn oder Drehlager, eingespart werden. When triggered, the armature 5 is then counterclockwise about the Tilting edge 23 tilted and in this case the plunger 4 upwards out of the Housing led to the apparent from Fig.3 state of Magnetic release is reached. Because the winding axis of the tortuous Biegefeder 19 is aligned in extension of the tilting edge 23, and because the tortuous spiral spring with its leg 24 in the Materialausnehmung 21 fixed and the anchor 5 at the same time parallel to the winding axis guided portion 26 of the leg 24 is supported, the acts Spiral bending spring 19 as a hinge for the anchor 5. A undesirable sliding of the armature 5 on the tilting edge 23 at Triggering and reloading the magnetic release will be like this largely avoided. Since the tortuous spiral spring 19 not only the storage and mounting of the anchor is used, but at the same time also force for the plunger 4 generated and reloading the of externally mechanically loaded recharging energy dampens Magnetic release parts, such as additional springs or pivot bearings, be saved.

Eine besonders symmetrische und daher kräftefreie Lagerung des Ankers 5 wird dann erreicht, wenn das Federelement 18 statt einer gewundenen Biegefeder die zwei aus Fig.1 ersichtlichen in einer Doppelfeder integrierten gewundenen Biegefedern 19 und 20 aufweist. Diese beiden Federn sind gegenläufig gewunden ausgebildet und spiegelsymmetrisch in den Materialausnehmungen 21, 22 angeordnet. Die parallel zur Windungsachse ausgerichteten Abschnitte der auf den Anker 5 wirkenden Schenkel dieser Federn sind Teil eines aus Fig.3 ersichtlichen und in der Nut 27 gehaltenen Verbindungsstegs 28.A particularly symmetrical and therefore force-free storage of Anchor 5 is reached when the spring element 18 instead of a Spiral spiral spring the two of Fig.1 apparent in a Double spring integrated winding bending springs 19 and 20 has. These two springs are formed in opposite directions wound and mirror-symmetrical in the material recesses 21, 22nd arranged. The parallel to the winding axis aligned portions of the anchor 5 acting legs of these springs are part of a from Fig.3 apparent and held in the groove 27 connecting web 28th

Eine besonders sichere Lagerung der beiden gewundenen Biegefedern 19, 20 wird erreicht, wenn sie jeweils als zylindrische Schraubenfeder ausgebildet sind und jeweils auf einem axial geführten feststehenden Lagerbolzen gehalten sind. Ein solcher Lagerbolzen kann in den die beiden gewundenen Biegefedern 19, 20 haltenden Zwischenboden 12 eingeformt sein. In Fig.4 ist ein solcher die gewundene Biegefeder 19 lagernder Bolzen mit dem Bezugszeichen 29 bezeichnet.A particularly safe storage of the two spiral bending springs 19, 20 is achieved when each as a cylindrical coil spring are formed and each on an axially guided stationary bearing bolts are held. Such a bearing pin can in the two spiral bending springs 19, 20 holding Be intermediate 12 molded. In Figure 4 is such a the wound bending spring 19 bearing bolt with the reference numeral 29th designated.

Es ist von Vorteil, den Schenkel 25 in Ankernähe anzubringen, da dann sein axial gerichteter Abschnitt 26 kurz ausgebildet ist und zugleich unerwünschte radial und axial wirkende Kräfte von der Feder weitgehend ferngehalten werden. Eine besonders sichere Kraftübertragung der Federn 19, 20 ist dann gewährleistet, wenn die beiden Schenkel der Federn 19, 20 jeweils tangential an deren Windungen anzusetzen. Zugleich lässt sich eine solche Feder besonders einfach fertigen. Für eine sichere Halterung der Federn 19, 20 ist es - wie aus den Figuren 2 bis 4 ersichtlich ist - jedoch von Vorteil, den Schenkel 24 radial an den Windungen anzusetzen. It is advantageous to attach the leg 25 in Ankernähe because then its axially directed portion 26 is formed short and at the same time unwanted radial and axial forces from the Spring are largely kept away. A particularly safe Power transmission of the springs 19, 20 is ensured when the two legs of the springs 19, 20 each tangent to to set their turns. At the same time, such a spring can be very easy to manufacture. For a secure mounting of the springs 19, 20 it is - as is apparent from Figures 2 to 4 - however, an advantage, the leg 24 radially to the windings to be set.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Bodenground
22
Deckelcover
33
Öffnungopening
44
Stösseltappet
55
Ankeranchor
7, 87, 8
Jochblecheyokes
99
Jochyoke
1010
Bolzenbolt
1111
Permanentmagnetpermanent magnet
1212
Zwischenbodenfalse floor
13, 1413, 14
StegeStege
1515
Schenkelleg
1616
Auslösespuletrip coil
1717
Stromanschlüssepower connectors
1818
Federelementspring element
19, 2019, 20
gewundene Biegefedernwinding spiral springs
21, 2221, 22
Materialausnehmungenmaterial recesses
2323
Kippkantetilting edge
24, 2524, 25
Schenkelleg
2626
Abschnittsection
2727
Nutgroove
2828
Verbindungsstegconnecting web
2929
Lagerbolzenbearing bolt

Claims (11)

  1. Magnetic release, in particular for a fault-current circuit breaker, having a magnetic circuit which is supplied by a permanent magnet (11), containing a U-shaped yoke (9) and an armature (5), which, in the closed state of the magnetic circuit, bridges the ends of the U and is mounted such that it can pivot, when the magnetic circuit opens, on a tipping edge (23), and having a prestressed spring element (18) for the purpose of loading the armature (5) counter to a force produced by the permanent magnet (11), characterized in that the spring element (18) has at least one wound torsion spring (19, 20) having a winding axis which is oriented in the extension of the tipping edge (23) and having two limbs (24, 25), of which a first limb (24) is held such that it is fixed, and a second limb (25) is mounted with a section (26), which is guided parallel to the winding axis, in a holder of the armature (5).
  2. Magnetic release according to Claim 1, characterized in that the holder has a groove (27) which extends parallel to the winding axis.
  3. Magnetic release according to either of Claims 1 and 2, characterized in that the at least one wound torsion spring (19, 20) is in the form of a cylindrical helical spring.
  4. Magnetic release according to Claim 3, characterized in that the second limb (25), which is preferably initially guided in the tangential direction, is placed on the turns of the at least one helical spring (19, 20) on the armature side.
  5. Magnetic release according to either of Claims 4 and 5, characterized in that the at least one cylindrical helical spring (19, 20) is held on an axially guided, fixed bearing bolt (29).
  6. Magnetic release according to Claim 5, characterized in that the bearing bolt (29) is moulded into a fixed intermediate base (12) which holds the at least one cylindrical helical spring (19, 20).
  7. Magnetic release according to Claim 6, characterized in that the intermediate base (12) has at least one groove-shaped material recess (21, 22), which serves the purpose of accommodating the turns and the first limb (24) of the at least one cylindrical helical spring (19, 20).
  8. Magnetic release according to one of Claims 1 to 7, characterized in that the spring element (18) has two wound torsion springs (19, 20), which are spaced apart from one another in the axial direction, each having a second limb (25), which contains the section (26) which is guided parallel to the winding axis, and a first limb (24).
  9. Magnetic release according to Claim 8, characterized in that the sections (26), which are guided parallel to the winding axis, are part of a connecting web (28) which is mounted in the holder of the armature (5).
  10. Magnetic release according to one of Claims 1 to 9, characterized in that the tipping edge (23) is formed by a bolt (10), which mechanically interconnects two plates (7, 8) of the yoke (9) which are magnetically insulated with respect to one another.
  11. Magnetic release according to one of Claims 1 to 10 having two yoke plates (7, 8) which are magnetically insulated with respect to one another, characterized in that the two yoke plates are designed to be bent back in the form of a V, and in that the permanent magnet (11) is in the form of a prismatoid having flat pole faces, and each of the pole faces of said permanent magnet rests on in each case one of the two limbs of the V.
EP97810591A 1996-09-12 1997-08-21 Magnetic trip device, in particular for a fault current circuit breaker Expired - Lifetime EP0829896B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19637076A DE19637076A1 (en) 1996-09-12 1996-09-12 Magnetic release, especially for a residual current circuit breaker
DE19637076 1996-09-12

Publications (3)

Publication Number Publication Date
EP0829896A2 EP0829896A2 (en) 1998-03-18
EP0829896A3 EP0829896A3 (en) 2000-10-25
EP0829896B1 true EP0829896B1 (en) 2005-10-19

Family

ID=7805368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810591A Expired - Lifetime EP0829896B1 (en) 1996-09-12 1997-08-21 Magnetic trip device, in particular for a fault current circuit breaker

Country Status (4)

Country Link
EP (1) EP0829896B1 (en)
AT (1) ATE307384T1 (en)
DE (2) DE19637076A1 (en)
ES (1) ES2251733T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19837059A1 (en) * 1998-08-17 2000-02-24 Maier & Cie C Tripping device for a circuit breaker, in particular a residual current circuit breaker
DE102004044977B4 (en) * 2004-09-16 2007-03-29 Siemens Ag Trip relay for a residual current device
EP4266340A1 (en) 2022-04-22 2023-10-25 ABB Schweiz AG Improvements in magnetic relays

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1546155A (en) * 1975-11-13 1979-05-16 Saparel Electromagnetic release
IT1162505B (en) * 1979-03-01 1987-04-01 Ave Belli Andrea HIGH SENSITIVITY DIFFERENTIAL SWITCH
DE3528470A1 (en) * 1985-08-08 1987-02-19 Bbc Brown Boveri & Cie Residual current device
DE3643510A1 (en) * 1986-12-19 1988-06-30 Felten & Guilleaume Energie MAGNETIC SYSTEM FOR QUICK SHUTDOWN
DE3838444A1 (en) * 1988-11-12 1990-05-17 Felten & Guilleaume Energie MAGNETIC SYSTEM FOR QUICK SHUTDOWN
DE4111092A1 (en) * 1991-04-07 1992-10-08 Schiele Gmbh & Co Kg Fault current relay

Also Published As

Publication number Publication date
DE59712447D1 (en) 2005-11-24
EP0829896A2 (en) 1998-03-18
DE19637076A1 (en) 1998-03-19
ES2251733T3 (en) 2006-05-01
EP0829896A3 (en) 2000-10-25
ATE307384T1 (en) 2005-11-15

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