EP0829895B1 - Permanent magnet for the magnetic circuit of a magnetic trip device preferably for a fault current circuit breaker - Google Patents

Permanent magnet for the magnetic circuit of a magnetic trip device preferably for a fault current circuit breaker Download PDF

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Publication number
EP0829895B1
EP0829895B1 EP97810590A EP97810590A EP0829895B1 EP 0829895 B1 EP0829895 B1 EP 0829895B1 EP 97810590 A EP97810590 A EP 97810590A EP 97810590 A EP97810590 A EP 97810590A EP 0829895 B1 EP0829895 B1 EP 0829895B1
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EP
European Patent Office
Prior art keywords
permanent magnet
magnetic
yoke
magnetic circuit
pole faces
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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EP97810590A
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German (de)
French (fr)
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EP0829895A2 (en
EP0829895A3 (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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Publication of EP0829895A3 publication Critical patent/EP0829895A3/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
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part 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
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
    • H01H71/323—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with rotatable armature

Definitions

  • the invention is based on a permanent magnet for the magnetic circuit of a preferably in a residual current circuit breaker (FI switch) can be used magnetic release.
  • a permanent magnet feeds magnetic flux into one of two yoke formed magnetically against each other insulated sheets of the magnetic circuit.
  • the yoke is generally U-shaped educated. The ends of the U are in the closed state of the magnetic circuit bridged by a hinged armature.
  • a tripping variable such as a fault current, is in one on one of the two legs of the U plugged trip coil fed a signal. This signal is generated in the trip coil a magnetic flux which is that of permanent magnets generated magnetic flux at the location of the anchor weakens.
  • Anchor loaded spring is used in the Weakening of the magnetic permanent flux lifted from the yoke and pivoted about a bearing axis. He releases a plunger mechanical actuation of a device. For a FI switch This ram acts on a switch lock, which opening causes a contact arrangement of the FI-switch.
  • the invention takes a state of the art of permanent magnets for the magnetic circuit of a magnetic release, as published in EP-B1-0 228 345, for example.
  • permanent magnets are cylindrical or cuboid. They are each between two each having a coupling point and by a magnetic poorly conducting diaphragm from each other magnetically arranged isolated sheets of a yoke.
  • the yoke is stock use part of the magnetic circuit of a in a FI switch deten magnetic release.
  • the positioning of these magnets to the Einkopplungsstellen is relatively expensive. Since this also Air gaps can not be ruled out with certainty the magnets in the production generally oversized become.
  • FR-A 2 596 577 is a permanent magnet for magnetic release disclosed with a horizontal, to the stand area parallel cover surface part for feeding in magnetic River in an anchor and a second inclined to it Cover surface part.
  • the task is based on a permanent magnet of to create the aforementioned type, which is in a simple Way in the yoke can be positioned and which one at the same time particularly good feeding of the magnetic flux into the yoke of the magnetic circuit allows.
  • the permanent magnet according to the invention is characterized from that he arranged because of his mutually inclined, flat pole faces easily to the coupling points of can be adjusted to both yoke plates.
  • the coupling points are according to the angle of inclination of the pole faces against each other angled and also just form.
  • the Permanent magnet positions itself after its installation in The yoke is self-acting, because of the effect of the magnetic Circle guided steady flow with its two against each other arranged inclined, flat pole faces to the complementarily inclined, level coupling points of the yoke is pressed. Not to avoiding air gaps between the pole faces of the magnet and the associated bearing surfaces of the coupling points of the yoke are significantly reduced. Therefore, the coupling of the Magnetic continuous flow into the yoke significantly improved.
  • 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 has in the region of the bend V-profile.
  • an obelisk-shaped permanent magnet 11 with planar Pole surfaces 11a, 11b arranged.
  • the two pole face 11a, 11b are each on one of the two legs 8a, 7b of the yoke. 9 at.
  • the permanent magnet 11 forming obelisk has in addition to the two pole faces 11a and 11b two to the two pole faces following, trapezoidal side surfaces and two parallel aligned, rectangular surfaces, one of which smaller the top surface and a larger the bottom surface of the Obelisk represents.
  • the two trapezoidal side surfaces are parallel to each other and perpendicular to the ground and top surfaces aligned.
  • the pole faces 11a, 11b are therefore each rectangular or square formed.
  • 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.
  • Each spring 19 or 20 is mounted in a material recess 21 or 22, which is formed in the web 13 and 14 respectively.
  • the spring element 18 loads the armature 5 before the release of the magnetic release a preload force.
  • the armature 5 is located before the release of the magnetic release on the Ends of the U on.
  • the armature 5 is then by the spring element 18th loaded with a biasing force.
  • the magnetic circuit is closed and the magnetic permanent flux is from the permanent magnet 11 over the yoke plate with his as a coupling point acting leg 7b and its leg 15, the armature 5 and the Yoke 8 with its acting as a coupling point leg 8a led back to the permanent magnet.
  • a Fault current weakens the magnetic field of one in the trip coil 16 fed current signal the field of magnetic Circle in the area of the anchor 5.
  • the anchor 5 is under the Effect of the spring element 18 is tilted and leads - as shown in Fig.2 is apparent - the plunger upwards, which then by Strike on the switch lock, not shown Switching off the RCCB causes.
  • the permanent magnet 11 Due to the obelisk-shaped design of the permanent magnet 11 is the magnetic steady flow is particularly good and without substantial Scatter losses in the yoke 9 coupled. This is a consequence of two mutually inclined arranged pole faces. By the Cooperation of the two pole faces 11a and 11b and the two V-shaped angled, planar legs 8a and 7b of the yoke. 9 position the permanent magnet 11 automatically and without additional aids in the right location.
  • the permanent magnet is designed as obelisk and has two trapezoidal side surfaces, since the permanent magnet then easily introduced into the V-profile.
  • the at the obelisk or wedge to the two pole faces 11a and 11b subsequent trapezoidal or triangular side surfaces need not necessarily flat, but can also be bent be. The same applies to the footprint of the Obelisk or wedge.
  • the permanent magnet 11 therefore does not have to necessarily be executed as obelisk or wedge, but can also be a prismatoid with two mutually angled, be flat pole faces 11a and 11b.
  • the trapezoidal side surfaces of the obelisk or the triangular side surfaces of the Wedge can be isosceles or unequal and optionally arranged inclined relative to the base be. For manufacturing reasons and for the sake of a good feed of the magnetic flux into the yoke is recommended However, it is a regularly trained obelisk or Wedge with perpendicular to the base arranged trapezoidal or provide triangular side surfaces.
  • the angle between the two pole faces 11 should not be too be dull, because then no longer good positioning is guaranteed. On the other hand, the angle must not are too pointed, since the energy density of the magnet 11th then too low and accordingly too little energy in the magnetic circuit is fed. Highly recommended is an angle between 60 ° and 120 °.
  • the two yoke plates 7, 8 need not necessarily be V-shaped be angled. It is enough if the one yoke plate is flat and the other yoke plate is formed angled. Only important is that so formed when joining the two yoke plates Angle between the two sheets between the angle of inclination corresponds to the two pole face of the permanent magnet.

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

Abstract

The earth leakage circuit breaker has a permanent magnet Ä11Ü that has a pair of pole surfaces Ä11a,11bÜ that forms a magnetic circuit with a yoke Ä9Ü The yoke is formed of a pair of magnetically isolated plates Ä7,8Ü. The permanent magnet has a prism shape that enables it to be optimally positioned relative to the yoke for efficient flux transfer.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Bei der Erfindung wird ausgegangen von einem Permanentmagneten für den magnetischen Kreis eines vorzugsweise in einem Fehlerstromschutzschalter (FI-Schalter) einsetzbaren Magnetauslösers. Ein solcher Permanentmagnet speist magnetischen Fluss in ein von zwei magnetisch gegeneinander isolierten Blechen gebildetes Joch des magnetischen Kreises ein. Das Joch ist im allgemeinen U-förmig ausgebildet. Die Enden des U werden im geschlossenen Zustand des magnetischen Kreises von einem Klappanker überbrückt. 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 permanent magnet for the magnetic circuit of a preferably in a residual current circuit breaker (FI switch) can be used magnetic release. Such a permanent magnet feeds magnetic flux into one of two yoke formed magnetically against each other insulated sheets of the magnetic circuit. The yoke is generally U-shaped educated. The ends of the U are in the closed state of the magnetic circuit bridged by a hinged armature. At the Occurrence of a tripping variable, such as a fault current, is in one on one of the two legs of the U plugged trip coil fed a signal. This signal is generated in the trip coil a magnetic flux which is that of permanent magnets generated magnetic flux at the location of the anchor weakens. Of the Anchor loaded spring is used in the Weakening of the magnetic permanent flux lifted from the yoke and pivoted about a bearing axis. He releases a plunger mechanical actuation of a device. For a FI switch This ram acts on a switch lock, which opening causes a contact arrangement of the FI-switch.

STAND DER TECHNIKSTATE OF THE ART

Die Erfindung nimmt auf einen Stand der Technik von Permanentmagneten für den magnetischen Kreis eines Magnetauslösers Bezug, wie er etwa in EP-B1-0 228 345 veröffentlicht ist. In dieser Veröffentlichung beschriebene Permanentmagnete sind zylindrisch oder quaderförmig ausgebildet. Sie sind jeweils zwischen zwei je eine Einkopplungsstelle aufweisenden und durch ein magnetisch schlecht leitendes Diaphragma voneinander magnetisch isolierten Blechen eines Jochs angeordnet. Das Joch ist Bestand teil des magnetischen Kreises eines in einem FI-Schalter verwen deten Magnetauslösers. Das Positionieren dieser Magnete an den Einkopplungsstellen ist relativ aufwendig. Da hierbei zudem Luftspalte nicht mit Sicherheit auszuschliessen sind, müssen die Magnete in der Fertigung im allgemeinen überdimensioniert werden.The invention takes a state of the art of permanent magnets for the magnetic circuit of a magnetic release, as published in EP-B1-0 228 345, for example. In this Publication described permanent magnets are cylindrical or cuboid. They are each between two each having a coupling point and by a magnetic poorly conducting diaphragm from each other magnetically arranged isolated sheets of a yoke. The yoke is stock use part of the magnetic circuit of a in a FI switch deten magnetic release. The positioning of these magnets to the Einkopplungsstellen is relatively expensive. Since this also Air gaps can not be ruled out with certainty the magnets in the production generally oversized become.

In der Patentanmeldung FR-A 2 596 577 ist ein Permanentmagnet für Magnetauslöser offenbart mit einem horizontalen, zur Standfläche parallelen Deckflächenteil zur Einspeisung von magnetischem Fluss in einen Anker und einem dazu geneigten zweiten Deckflächenteil.In the patent application FR-A 2 596 577 is a permanent magnet for magnetic release disclosed with a horizontal, to the stand area parallel cover surface part for feeding in magnetic River in an anchor and a second inclined to it Cover surface part.

KURZE DARSTELLUNG DER ERFINDUNGBRIEF SUMMARY OF THE INVENTION

Der Erfindung, wie sie in den Patentansprüchen angegeben ist, liegt die Aufgabe zugrunde, einen Permanentmagneten der eingangs genannten Art zu schaffen, welcher sich in einfacher Weise im Joch positionieren lässt und welcher zugleich eine besonders gute Einspeisung des magnetischen Flusses in das Joch des magnetischen Kreises ermöglicht.The invention as stated in the patent claims the task is based on a permanent magnet of to create the aforementioned type, which is in a simple Way in the yoke can be positioned and which one at the same time particularly good feeding of the magnetic flux into the yoke of the magnetic circuit allows.

Der Permanentmagnet nach der Erfindung zeichnet sich dadurch aus, dass er wegen seiner gegeneinander geneigt angeordneten, ebenen Polflächen problemlos an die Einkopplungsstellen der beiden Jochbleche angepasst werden kann. Die Einkopplungsstellen sind entsprechend dem Neigungswinkel der Polflächen gegeneinander abgewinkelt und gleichfalls eben auszubilden. Der Permanentmagnet positioniert sich dann nach seinem Einbau in das Joch selbsttätig, da er durch die Wirkung des im magnetischen Kreis geführten Dauerflusses mit seinen beiden gegeneinander geneigt angeordneten, ebenen Polflächen an die komplementär geneigten, ebenen Einkopplungsstellen des Jochs gepresst wird. Nicht zu vermeidende Luftspalte zwischen den Polflächen des Magneten und den zugeordneten Auflageflächen der Einkopplungsstellen des Jochs werden so erheblich reduziert. Daher wird die Einkopplung des magnetischen Dauerflusses in das Joch wesentlich verbessert. Zugleich wird der unerwünschte magnetische Streufluss äusserst gering gehalten. Eine Fixierung des Permanentmagneten sowie aufwendige Justierarbeiten entfallen, da sich der Magnet selbsttätig in die richtigen Position bringt. Zudem ist nun die Vorzugsrichtung des Magneten leicht zu erkennen und kann der Magnet zudem isotrop oder anisotrop ausgeführt sein.The permanent magnet according to the invention is characterized from that he arranged because of his mutually inclined, flat pole faces easily to the coupling points of can be adjusted to both yoke plates. The coupling points are according to the angle of inclination of the pole faces against each other angled and also just form. Of the Permanent magnet then positions itself after its installation in The yoke is self-acting, because of the effect of the magnetic Circle guided steady flow with its two against each other arranged inclined, flat pole faces to the complementarily inclined, level coupling points of the yoke is pressed. Not to avoiding air gaps between the pole faces of the magnet and the associated bearing surfaces of the coupling points of the yoke are significantly reduced. Therefore, the coupling of the Magnetic continuous flow into the yoke significantly improved. At the same time the unwanted magnetic leakage flux is extremely kept low. A fixation of the permanent magnet as well Complex adjustment omitted, since the magnet automatically puts you in the right position. Moreover, now is the Easy to recognize preferred direction of the magnet and can the Magnet also be made isotropic or anisotropic.

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 eines Magnetauslösers für einen FI-Schalter mit einem Permanentmagneten nach der Erfindung, und
Fig.2
eine perspektivische Ansicht des Magnetauslösers gemäss Fig.1 nach dem Entfernen eines Teils 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 magnetic release for a FI switch with a permanent magnet according to the invention, and
Fig.2
a perspective view of the magnetic release according to Figure 1 after removing a part of its housing.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

In beiden 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 both figures, the same 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 Klebstellen 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-Profil aufweist. Zwischen den beiden eben ausgebildeten Schenkeln 7b, 8a des V-Profils ist ein obeliskförmig ausgebildeter Permanentmagnet 11 mit ebenen Polflächen 11a, 11b angeordnet. Die beiden Polfläche 11a, 11b liegen jeweils an je einem der beiden Schenkel 8a, 7b des Jochs 9 an. Der den Permanentmagneten 11 bildende Obelisk weist neben den beiden Polfächen 11a und 11b zwei an die beiden Polflächen anschliessende, trapezförmige Seitenflächen sowie zwei parallel zueinander ausgerichtete, rechteckige Flächen auf, von denen eine kleinere die Deckfläche und eine grössere die Grundfläche des Obelisken darstellt. Die beiden trapezförmigen Seitenflächen sind parallel zueinander und senkrecht zur Grund- und zur Deckfläche ausgerichtet. Die Polflächen 11a, 11b sind daher jeweils rechteckig oder quadratisch ausgebildet.The two yoke plates 7, 8 are each angled such that the yoke 9 has in the region of the bend V-profile. Between the two newly formed legs 7b, 8a of the V-profile is an obelisk-shaped permanent magnet 11 with planar Pole surfaces 11a, 11b arranged. The two pole face 11a, 11b are each on one of the two legs 8a, 7b of the yoke. 9 at. The permanent magnet 11 forming obelisk has in addition to the two pole faces 11a and 11b two to the two pole faces following, trapezoidal side surfaces and two parallel aligned, rectangular surfaces, one of which smaller the top surface and a larger the bottom surface of the Obelisk represents. The two trapezoidal side surfaces are parallel to each other and perpendicular to the ground and top surfaces aligned. The pole faces 11a, 11b are therefore each rectangular or square formed.

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. 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 einer 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. Each spring 19 or 20 is mounted in a material recess 21 or 22, which is formed in the web 13 and 14 respectively. The spring element 18 loads the armature 5 before the release of the magnetic release a preload force.

Der Anker 5 liegt vor dem Auslösen des Magnetauslösers auf den Enden des U auf. Der Anker 5 ist dann durch das Federelement 18 mit einer Vorspannkraft belastet. Der magnetische Kreis ist geschlossen und der magnetische Dauerfluss wird vom Permanentmagneten 11 über das Jochblech mit seinem als Einkopplungsstelle wirkenden Schenkel 7b und seinem Schenkel 15, den Anker 5 und das Jochblech 8 mit seinem als Einkopplungsstelle wirkenden Schenkel 8a 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 der Wirkung des Federelements 18 gekippt und führt - wie aus Fig.2 ersichtlich ist - den Stössel nach oben, welcher sodann durch Aufschlagen auf das nicht dargestellte Schaltschloss ein Ausschalten des FI-Schutzschalters bewirkt. The armature 5 is located before the release of the magnetic release on the Ends of the U on. The armature 5 is then by the spring element 18th loaded with a biasing force. The magnetic circuit is closed and the magnetic permanent flux is from the permanent magnet 11 over the yoke plate with his as a coupling point acting leg 7b and its leg 15, the armature 5 and the Yoke 8 with its acting as a coupling point leg 8a led back to the permanent magnet. When a Fault current weakens the magnetic field of one in the trip coil 16 fed current signal the field of magnetic Circle in the area of the anchor 5. The anchor 5 is under the Effect of the spring element 18 is tilted and leads - as shown in Fig.2 is apparent - the plunger upwards, which then by Strike on the switch lock, not shown Switching off the RCCB causes.

Durch die obeliskförmige Ausbildung des Permanentmagneten 11 wird der magnetische Dauerfluss besonders gut und ohne wesentliche Streuverluste ins Joch 9 eingekoppelt. Dies ist eine Folge der beiden gegeneinander geneigt angeordneten Polflächen. Durch das Zusammenwirken der beiden Polflächen 11a und 11b und der beiden V-förmig abgewinkelten, ebenen Schenkel 8a und 7b des Jochs 9 positionieert sich der Permanentmagnet 11 selbsttätig und ohne zusätzliche Hilfsmittel in die richtigen Lage. Hierbei ist es von Vorteil, dass der Permanentmagnet als Obelisk ausgebildet ist und zwei trapezförmige Seitenflächen aufweist, da der Permanentmagnet dann problemlos ins V-Profil eingeführt werden kann.Due to the obelisk-shaped design of the permanent magnet 11 is the magnetic steady flow is particularly good and without substantial Scatter losses in the yoke 9 coupled. This is a consequence of two mutually inclined arranged pole faces. By the Cooperation of the two pole faces 11a and 11b and the two V-shaped angled, planar legs 8a and 7b of the yoke. 9 position the permanent magnet 11 automatically and without additional aids in the right location. Here it is from Advantage that the permanent magnet is designed as obelisk and has two trapezoidal side surfaces, since the permanent magnet then easily introduced into the V-profile.

Fertigungstechnisch noch einfacher lässt sich ein als Keil ausgeführter Permanentmagnet herstellen, doch ist dann dafür Sorge zu tragen, dass die Spitze des Keils zwischen den an den beiden Schenkeln 7b und 8a ansetzenden Teilen der Jochbleche 7 und 8 ausreichend Platz hat.Manufacturing technology even easier than a wedge executed permanent magnet, but then it is Take care that the top of the wedge between the at the two legs 7b and 8a attaching parts of the yoke plates. 7 and 8 has enough space.

Die beim Obelisk bzw. Keil an die beiden Polflächen 11a und 11b anschliessenden trapez- bzw. dreieckförmigen Seitenflächen müssen nicht notwendigerweise eben, sondern können auch gebogen ausgebildet sein. Entsprechendes gilt auch für die Grundfläche des Obelisks bzw. des Keils. Der Permanentmagnet 11 muss daher nicht notwendigerweise als Obelisk oder Keil ausgeführt sein, sondern kann auch ein Prismatoid mit zwei gegeneinander gewinkelten, ebenen Polflächen 11a und 11b sein. Die trapezförmigen Seitenflächen des Obelisken bzw. die dreieckförmigen Seitenflächen des Keils können gleichschenkelig oder ungleichschenkelig ausgeführt und gegebenenfalls gegenüber der Grundfläche geneigt angeordnet sein. Aus fertigungstechnischen Gründen und aus Gründen einer guten Einspeisung des magnetischen Flusses in das Joch empfiehlt es sich jedoch, einen regelmässig ausgebildeten Obelisken bzw. Keil mit senkrecht zur Grundfläche angeordneten trapez- bzw. dreieckförmigen Seitenflächen vorzusehen. The at the obelisk or wedge to the two pole faces 11a and 11b subsequent trapezoidal or triangular side surfaces need not necessarily flat, but can also be bent be. The same applies to the footprint of the Obelisk or wedge. The permanent magnet 11 therefore does not have to necessarily be executed as obelisk or wedge, but can also be a prismatoid with two mutually angled, be flat pole faces 11a and 11b. The trapezoidal side surfaces of the obelisk or the triangular side surfaces of the Wedge can be isosceles or unequal and optionally arranged inclined relative to the base be. For manufacturing reasons and for the sake of a good feed of the magnetic flux into the yoke is recommended However, it is a regularly trained obelisk or Wedge with perpendicular to the base arranged trapezoidal or provide triangular side surfaces.

Der Winkel zwischen den beiden Polflächen 11 sollte nicht zu stumpf sein, da dann eine gute Positionierbarkeit nicht mehr gewährleistet ist. Andererseits darf der Winkel aber auch nicht zu spitz gewählt werden, da die Energiedichte des Magneten 11 dann zu gering ist und dementsprechend zu wenig Energie in den magnetischen Kreis eingespeist wird. Zu empfehlen ist ein Winkel zwischen 60° und 120°.The angle between the two pole faces 11 should not be too be dull, because then no longer good positioning is guaranteed. On the other hand, the angle must not are too pointed, since the energy density of the magnet 11th then too low and accordingly too little energy in the magnetic circuit is fed. Highly recommended is an angle between 60 ° and 120 °.

Die beiden Jochbleche 7, 8 müssen nicht notwendigerweise V-förmig abgewinkelt sein. Es reicht aus, wenn das eine Jochblech eben und das andere Jochblech gewinkelt ausgebildet ist. Wichtig ist nur, dass der so beim Zusammenfügen der beiden Jochbleche gebildete Winkel zwischen den beiden Blechen dem Neigungswinkel zwischen den beiden Polfläche des Permanentmagneten entspricht.The two yoke plates 7, 8 need not necessarily be V-shaped be angled. It is enough if the one yoke plate is flat and the other yoke plate is formed angled. Only important is that so formed when joining the two yoke plates Angle between the two sheets between the angle of inclination corresponds to the two pole face of the permanent magnet.

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

Claims (6)

  1. Permanent magnet (11) in a magnetic circuit of a magnetic release, which can preferably be used in a residual-current circuit breaker, having two flat pole faces (11a, 11b) for the purpose of feeding magnetic flux into a yoke (9), containing two plates (7, 8) which are magnetically insulated from one another, in the magnetic circuit, characterized in that the permanent magnet (11) is in the form of a prismoid having two flat sides which are arranged at an angle with respect to one another, have approximately the same size and act as pole faces (11a, 11b).
  2. Permanent magnet according to Claim 1, characterized in that the prismoid is in the form of a wedge.
  3. Permanent magnet according to one of Claims 1 to 2, characterized in that the two pole faces (11a, 11b) are arranged at an angle of 60° to 120° with respect to one another.
  4. Magnetic circuit of a magnetic release, which can preferably be used in a residual-current circuit breaker, having a permanent magnet (11) having two flat pole faces (11a, 11b) and having a yoke (9) containing two plates (7, 8) which are magnetically insulated from one another, characterized in that the two pole faces (11a, 11b) of the permanent magnet (11) are at an angle with respect to one another and feed magnetic flux into the two plates (7, 8).
  5. Magnetic circuit according to Claim 4, characterized in that the permanent magnet (11) is in the form of an in particular wedge-shaped prismoid.
  6. Magnetic circuit according to Claim 4, characterized in that a yoke plate (7, 8) has a bent-back, flat limb (7a, 8a) which interacts with a pole face (11a, 11b) of the permanent magnet (11).
EP97810590A 1996-09-12 1997-08-21 Permanent magnet for the magnetic circuit of a magnetic trip device preferably for a fault current circuit breaker Expired - Lifetime EP0829895B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19637077 1996-09-12
DE19637077A DE19637077A1 (en) 1996-09-12 1996-09-12 Permanent magnet for the magnetic circuit of a magnetic release that can preferably be used in a residual current circuit breaker

Publications (3)

Publication Number Publication Date
EP0829895A2 EP0829895A2 (en) 1998-03-18
EP0829895A3 EP0829895A3 (en) 2000-11-02
EP0829895B1 true EP0829895B1 (en) 2005-06-08

Family

ID=7805369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810590A Expired - Lifetime EP0829895B1 (en) 1996-09-12 1997-08-21 Permanent magnet for the magnetic circuit of a magnetic trip device preferably for a fault current circuit breaker

Country Status (4)

Country Link
EP (1) EP0829895B1 (en)
AT (1) ATE297598T1 (en)
DE (2) DE19637077A1 (en)
ES (1) ES2243973T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924279A1 (en) * 1999-05-27 2000-11-30 Aweco Appliance Sys Gmbh & Co Automatic power switching device for coffee machine has temperature controlled bistable switch with electromagnetic coil for control of switch element
FR2874740B1 (en) 2004-09-02 2006-10-20 Schneider Electric Ind Sas ELECTROMAGNETIC TRIGGER AND ELECTRICAL CUTTING APPARATUS HAVING THE SAME
FR2877137B1 (en) 2004-10-21 2006-12-22 Schneider Electric Ind Sas ELECTROMAGNETIC TRIGGER AND ELECTRIC PROTECTION APPARATUS HAVING THE SAME
DE102005050636A1 (en) * 2005-10-20 2007-05-03 Siemens Ag Magnetic system of a magnetic release
EP2718953B1 (en) 2011-06-06 2015-09-30 Eti Elektroelement D.D. Electromagnetic relay with improved yoke, in particular a relay for interruption of electric circuit in the case of diffferential current, and switch comprising such relay
DE102011082114B3 (en) * 2011-09-05 2013-01-31 Siemens Aktiengesellschaft Electromagnetic drive
US11874140B2 (en) 2016-02-17 2024-01-16 Infineon Technologies Ag Tapered magnet

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB317149A (en) * 1928-05-19 1929-08-15 Siemens Brothers & Co Ltd Improvements in or relating to electro-magnetic devices
DE846863C (en) * 1942-08-10 1952-08-18 Siemens Ag relay
FR1541052A (en) * 1967-08-11 1968-10-04 Ind Electr De La Seine L Ultra-sensitive electro-magnetic trip unit
AT372217B (en) * 1980-11-04 1983-09-12 Biegelmeier Gottfried MAGNETIC RELEASE HIGH SENSITIVITY
AT375211B (en) * 1981-09-16 1984-07-10 Biegelmeier Gottfried MAGNETIC RELEASE HIGH SENSITIVITY
ES2011457B3 (en) * 1985-12-13 1990-01-16 Cmc Carl Maier + Cie Ag MAGNET DISCONNECT FOR DEFECT CURRENT PROTECTION SWITCHES
FR2596577B1 (en) * 1986-03-28 1993-04-30 Serd Soc Et Realisa Disjonct POLARIZED TRIGGER

Also Published As

Publication number Publication date
EP0829895A2 (en) 1998-03-18
ATE297598T1 (en) 2005-06-15
DE59712338D1 (en) 2005-07-14
EP0829895A3 (en) 2000-11-02
DE19637077A1 (en) 1998-03-19
ES2243973T3 (en) 2005-12-01

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