EP0335774B1 - Tripping magnet for a circuit breaker - Google Patents

Tripping magnet for a circuit breaker Download PDF

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Publication number
EP0335774B1
EP0335774B1 EP89400804A EP89400804A EP0335774B1 EP 0335774 B1 EP0335774 B1 EP 0335774B1 EP 89400804 A EP89400804 A EP 89400804A EP 89400804 A EP89400804 A EP 89400804A EP 0335774 B1 EP0335774 B1 EP 0335774B1
Authority
EP
European Patent Office
Prior art keywords
yoke
fixed contact
core
induction coil
insulating
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 - Lifetime
Application number
EP89400804A
Other languages
German (de)
French (fr)
Other versions
EP0335774A1 (en
Inventor
Jean-Marie Roiatti
Francis Deckert
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.)
Hager Electro SAS
Original Assignee
Hager Electro SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hager Electro SAS filed Critical Hager Electro SAS
Priority to AT89400804T priority Critical patent/ATE99831T1/en
Publication of EP0335774A1 publication Critical patent/EP0335774A1/en
Application granted granted Critical
Publication of EP0335774B1 publication Critical patent/EP0335774B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2481—Electromagnetic mechanisms characterised by the coil design
    • 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
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5855—Electric connections to or between contacts; Terminals characterised by the use of a wire clamping screw or nut
    • H01H2001/5861—Box connector with a collar or lug for clamping internal rail and external conductor together by a tightening screw
    • 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
    • H01H2071/249—Electromagnetic mechanisms with part of the magnetic circuit being in the normal current path in the circuit breaker, e.g. yoke, fixed contact and arc-runner are made out of one single conductive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the present invention relates to a magnetic trip device for a circuit breaker.
  • the circuit breaker devices are generally placed in modular housings and include a more or less complex mechanism for opening contacts, by an electromagnetic device comprising a coil sensitive to overcurrents and a plunger core, made of magnetic material such as mild steel, moved in in the event of an overcurrent, this core being provided with a striker acting on the mechanism to cause the opening and rapid separation of the contacts.
  • German patent application DE-A 3 333 792 describes a magnetic trip device for a circuit breaker comprising a cylinder head in which is mounted an induction coil, one end of which is welded to the cylinder head near an interrupted part thereof, a core assembly plunger, striker, return spring, and a fixed contact which is fixed to the cylinder head to which it is electrically fixed and which is extended by a part forming a switching electrode intended for guiding the arc towards a stack of extinguishing sheets arc.
  • the other end of the induction coil extends away from the cylinder head towards its electrical connection.
  • the object of the invention is to remedy these problems by proposing a device which makes it possible to obtain, whatever the size of the winding, very great precision in the production of the different types of magnetic trip devices, that is to say in the respective arrangement of the elements which compose them, and in the relative position of these magnetic trip units in the housings.
  • Another objective of the invention is to provide a magnetic trip unit with a small footprint and which consists of a reduced number of parts.
  • Another object of the invention is to provide a pre-assembled and rigid magnetic trip device which can be placed in one piece in a circuit breaker box.
  • Yet another objective of the invention is to provide a magnetic trip device, the assembly and installation of which in a circuit breaker box can be fully automated.
  • the present invention relates to a magnetic trip device for a circuit breaker according to claim 1.
  • the subject of the present invention is a magnetic trip device as defined in claim 2 and in which the switching electrode is produced by cutting a tab in the strip forming the yoke. This this arrangement makes it possible to make the magnetic trip device even more compact and therefore to save space in the circuit breaker box.
  • the fixed contact is fixed frontally to the cylinder head with the interposition of a piece of insulating material.
  • the piece of insulating material ensuring the insulation of the fixed contact relative to the front face of the cylinder head is preferably a front insulating piece while an insulating sheath surrounds the fixed core associated with the plunger core and guides this plunger core.
  • the insulating sheath is replaced by an insulating washer located between the front face of the fixed core and the rear side of the front face of the cylinder head, the guide of the plunger core by the insulated inner surface of the winding.
  • the fixed contact is crimped, with the fixed core associated with the plunger core, on the front face of the cylinder head and isolated from it.
  • the cylinder head is preferably closed so as to produce a flow channeling cage.
  • FIGS. 1 to 3 show an embodiment of the invention in which the cylinder head 1 is closed in order to produce a flow channeling cage.
  • the cylinder head comes from a folded and cut metal strip, as can be seen in FIG. 2.
  • This cylinder head (see FIG. 1) is intended to receive at one of its ends, which constitutes the connection terminal 2, a clamping cage 3 for the connection of a supply conductor not shown and at its other end, hereinafter called the front face 4, the fixed contact 5 of the trip device.
  • This cylinder head further houses, in its part closed in a cage, the electromagnetic tripping assembly, namely an induction coil 6 with circular section associated with a plunger core 7 with a striker 8, said plunger core 7 being returned to the position of rest by an elastic return member, in this case a spring 9, the plunger core 7 being guided in its movement in a tubular sheath 10 made of insulating material, and the striker 8 being guided in a fixed core 11 isolated from the cylinder head 1 and of the winding 6 by a front insulating part 18 and by the insulating sheath 10.
  • the electromagnetic tripping assembly namely an induction coil 6 with circular section associated with a plunger core 7 with a striker 8
  • the plunger core 7 being returned to the position of rest by an elastic return member, in this case a spring 9
  • the plunger core 7 being guided in its movement in a tubular sheath 10 made of insulating material
  • the striker 8 being guided in a fixed core 11 isolated from the cylinder head 1 and of the wind
  • the cylinder head 1 is formed from the cut and folded metal strip, having a part forming the connection terminal 2.
  • said part continues with a straight branch 12 which becomes, after a second 90 ° bend, an arm of the cage hereinafter called base 13.
  • This base has a narrower portion 13 a , located immediately after the above 90 ° bend and originating from the cutting of a peripheral zone of said base 13.
  • the base 13 is continues by the front face 4 which forms one of the sides of the cage and which continues, after a 90 ° bend, by the second arm 14 of the cage which extends over the entire length of the base 13 not reduced by width by the above cutting.
  • This arm 14 continues itself, after a new 90 ° bend, by the second flank 15 of the cage and comes into contact with the base 13, at the level of the part reduced in width of said base 13.
  • the front face 4 is pierced with an orifice 16 intended to receive the front insulating part 18 and the fixed core 11.
  • the sidewall 15 is also pierced with an orifice 17 aligned with the previous one and intended to receive the insulating sheath 10 and the plunger 7.
  • the triggering assembly namely induction coil 6, plunger core 7, striker 8, spring 9 and fixed core 11, and the insulating sheath 10 placed between the induction coil and the other aforementioned parts, is placed in the cylinder head 1; the fixed contact 5 is brought into contact with the part of the fixed core 11 protruding through the orifice 16 and the front insulating part 18, then the fixed core 11 is crimped on the front face at the same time fixing the fixed contact 5.
  • L insulation is provided by the insulating sheath 10 and the front insulating part 18, and therefore isolates the plunger core 7 and the fixed core 11 relative to the induction coil 6 and to the cylinder head 1, as well as the fixed contact 5 relative to at the cylinder head 1.
  • one end of the induction coil 6 is welded to the base 13, a suitable cutout of the sidewall 15 allowing the passage of this end for welding on the base 13.
  • the other end of the induction coil 6 is soldered directly to the fixed contact 5 thanks to an appropriate cutting of the front 4.
  • the fixed contact 5 is extended by a switching electrode 19 intended for guiding the arc towards a stack of arc extinguishing sheets, not shown.
  • the switching electrode can be produced by cutting out an appropriate tab in the base 13, as will be described later.
  • the magnetic trigger thus described corresponds to a preferred embodiment. It can be easily and very precisely arranged in a modular housing, whatever the type of induction winding.
  • Figures 4 to 6 show another embodiment of the invention in which the induction winding is of large diameter. In this case, it is not necessary to make a flow channeling cage. On the other hand, the winding has a square section. For this reason, the embodiment shown does not provide an insulating sheath as previously but simply an insulating washer 10a to isolate the front face of the fixed core 11 relative to the front face 4 of the frame.
  • the movable core 7, carrying its striker 8 is guided by the interior, substantially cylindrical surface of the coil 20 and is electrically isolated by the insulating varnish covering the conductor, the winding of which forms the coil.
  • the cylinder head 1 then has the connection terminal 2, the straight branch 12, a base 21 of constant width and the front face 4 with its orifice 16.
  • the fixed core 11 is, as in the previous embodiment, crimped with the fixed contact 5 and the front insulating part 18.
  • One end of the induction coil 20 is welded to the base 21, which stiffens the assembly, the other end being welded to the fixed contact 5 in the same way than in the previous embodiment.
  • the switching electrode is formed by a tab 22 cut out in the base 21, the uncut part being situated on the side of the front face 4. This arrangement makes it possible to channel the arc towards the stack of arc extinguishing sheets not shown.
  • the switching electrode could also be formed by an extension of the fixed contact 5.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The magnetic trip comprises a yoke, a trip device, a stationary contact and a switching electrode. The yoke (1) is formed by cutting out and bending a metal strip so as to incorporate a connection terminal (2) and permit the fixing in position of the induction coil (6) by soldering one of its two ends to the yoke (1), the other end being soldered to the stationary contact (5) which is carried by the yoke (1), but is insulated in relation to the latter. <IMAGE>

Description

La présente invention a trait à un déclencheur magnétique pour disjoncteur.The present invention relates to a magnetic trip device for a circuit breaker.

Les dispositifs de disjonction sont généralement placés dans des boîtiers modulaires et comportent un mécanisme plus ou moins complexe d'ouverture de contacts, par un dispositif électromagnétique comprenant une bobine sensible aux surintensités et un noyau plongeur, en matériau magnétique tel que acier doux, déplacé en cas d'apparition de surintensité, ce noyau étant muni d'un percuteur agissant sur le mécanisme pour provoquer l'ouverture et la séparation rapide des contacts.The circuit breaker devices are generally placed in modular housings and include a more or less complex mechanism for opening contacts, by an electromagnetic device comprising a coil sensitive to overcurrents and a plunger core, made of magnetic material such as mild steel, moved in in the event of an overcurrent, this core being provided with a striker acting on the mechanism to cause the opening and rapid separation of the contacts.

Ces dispositifs sont non seulement complexes à réaliser et à assembler, mais aussi et surtout délicats à disposer dans les boîtiers modulaires destinés à les recevoir, la précision d'installation étant une condition sine qua non de leur bon fonctionnement. De plus, chaque diamètre de bobinage nécessite des conditions de montage différentes.These devices are not only complex to make and assemble, but also and above all delicate to place in the modular boxes intended to receive them, installation precision being a sine qua non condition for their proper functioning. In addition, each winding diameter requires different mounting conditions.

La demande de brevet allemand DE-A 3 333 792 décrit un déclencheur magnétique pour disjoncteur comprenant une culasse dans laquelle est montée une bobine à induction dont une extrémité est soudée à la culasse près d'une partie interrompue de celle-ci, un ensemble noyau plongeur, percuteur, ressort de rappel, et un contact fixe qui est fixé à la culasse à laquelle il est solidaire électriquement et qui se prolonge par une partie formant électrode de commutation destinée au guidage de l'arc vers une pile de tôles d'extinction d'arc. L'autre extrémité de la bobine à induction s'étend loin de la culasse vers son raccordement électrique.German patent application DE-A 3 333 792 describes a magnetic trip device for a circuit breaker comprising a cylinder head in which is mounted an induction coil, one end of which is welded to the cylinder head near an interrupted part thereof, a core assembly plunger, striker, return spring, and a fixed contact which is fixed to the cylinder head to which it is electrically fixed and which is extended by a part forming a switching electrode intended for guiding the arc towards a stack of extinguishing sheets arc. The other end of the induction coil extends away from the cylinder head towards its electrical connection.

D'après la demande de brevet européen EP-A-008 558, on connaît un disjoncteur de conception complexe présentant une culasse qui ne porte pas de contact fixe et qui présente une extrémité se prolongeant pour former une borne de raccordement sur laquelle vient s'adapter une cage de serrage.According to European patent application EP-A-008 558, a circuit breaker of complex design is known having a cylinder head which does not carry a fixed contact and which has an end extending to form a connection terminal on which comes adapt a clamping cage.

L'invention a pour objectif de remédier à ces problèmes en proposant un dispositif qui permet d'obtenir, quelle que soit la dimension du bobinage, une précision très grande dans la réalisation des différents types de déclencheurs magnétiques, c'est-à-dire dans la disposition respective des éléments qui les composent, et dans la position relative de ces déclencheurs magnétiques dans les boîtiers.The object of the invention is to remedy these problems by proposing a device which makes it possible to obtain, whatever the size of the winding, very great precision in the production of the different types of magnetic trip devices, that is to say in the respective arrangement of the elements which compose them, and in the relative position of these magnetic trip units in the housings.

Un autre objectif de l'invention est de fournir un déclencheur magnétique de faible encombrement et qui soit constitué d'un nombre réduit de pièces.Another objective of the invention is to provide a magnetic trip unit with a small footprint and which consists of a reduced number of parts.

Un autre objectif de l'invention est de fournir un déclencheur magnétique pré-assemblé et rigide qui puisse être placé d'un seul tenant dans un boîtier de disjoncteur.Another object of the invention is to provide a pre-assembled and rigid magnetic trip device which can be placed in one piece in a circuit breaker box.

Un autre objectif encore de l'invention est de fournir un déclencheur magnétique dont l'assemblage et la mise en place dans un boîtier de disjoncteur puissent être entièrement automatisés.Yet another objective of the invention is to provide a magnetic trip device, the assembly and installation of which in a circuit breaker box can be fully automated.

La présente invention a pour objet un déclencheur magnétique pour disjoncteur selon la revendication 1.The present invention relates to a magnetic trip device for a circuit breaker according to claim 1.

De même,la présente invention a pour objet un déclencheur magnétique tel que défini à la revendication 2 et dans lequel l'électrode de commutation est réalisée par découpage d'une languette dans la bande formant la culasse. Cette disposition permet de rendre le déclencheur magnétique encore plus compact et donc d'obtenir un gain de place dans le boîtier du disjoncteur.Likewise, the subject of the present invention is a magnetic trip device as defined in claim 2 and in which the switching electrode is produced by cutting a tab in the strip forming the yoke. This this arrangement makes it possible to make the magnetic trip device even more compact and therefore to save space in the circuit breaker box.

De préférence, le contact fixe est fixé frontalement à la culasse avec interposition d'une pièce en matériau isolant.Preferably, the fixed contact is fixed frontally to the cylinder head with the interposition of a piece of insulating material.

La pièce en matériau isolant assurant l'isolation du contact fixe par rapport à la face frontale de la culasse est, de préférence, une pièce isolante frontale tandis qu'une gaine isolante entoure le noyau fixe associé au noyau plongeur et guide ce noyau plongeur.The piece of insulating material ensuring the insulation of the fixed contact relative to the front face of the cylinder head is preferably a front insulating piece while an insulating sheath surrounds the fixed core associated with the plunger core and guides this plunger core.

Dans le cas d'une bobine à induction présentant un bobinage à section carrée de gros diamètre, la gaine isolante est remplaceé par une rondelle isolante situeé entre la face antérieure du noyau fixe et le côté arrière de la face frontale de la culasse, le guidage du noyau plongeur s'effectuant par la surface intérieure isolée du bobinage.In the case of an induction coil with a square section winding of large diameter, the insulating sheath is replaced by an insulating washer located between the front face of the fixed core and the rear side of the front face of the cylinder head, the guide of the plunger core by the insulated inner surface of the winding.

De préférence, le contact fixe est serti, avec le noyau fixe associé au noyau plongeur, sur la face frontale de la culasse et isolé de celle-ci.Preferably, the fixed contact is crimped, with the fixed core associated with the plunger core, on the front face of the cylinder head and isolated from it.

Dans le cas d'une bobine à induction présentant un bobinage de petit diamètre, la culasse est, de préférence, fermée de façon à réaliser une cage de canalisation de flux.In the case of an induction coil having a small diameter coil, the cylinder head is preferably closed so as to produce a flow channeling cage.

L'invention va être maintenant décrite plus en détail à l'aide du dessin annexé dans lequel :

  • la figure 1 représente une vue en coupe d'un déclencheur magnétique selon un mode de réalisation conforme à l'invention,
  • la figure 2 représente une vue en perspective de la culasse du déclencheur magnétique selon la figure 1,
  • la figure 3 représente une vue en perspective du déclencheur magnétique selon la figure 1,
  • la figure 4 représente une vue en coupe d'un déclencheur magnétique selon un autre mode de réalisation conforme à l'invention,
  • la figure 5 représente une vue en perspective de la culasse du déclencheur magnétique selon la figure 4,
  • la figure 6 représente une vue en perspective du déclencheur magnétique selon la figure 4.
The invention will now be described in more detail with the aid of the appended drawing in which:
  • FIG. 1 represents a sectional view of a magnetic trip device according to an embodiment according to the invention,
  • FIG. 2 represents a perspective view of the cylinder head of the magnetic trip device according to FIG. 1,
  • FIG. 3 represents a perspective view of the magnetic trip device according to FIG. 1,
  • FIG. 4 represents a sectional view of a magnetic trip device according to another embodiment according to the invention,
  • FIG. 5 represents a perspective view of the cylinder head of the magnetic trip device according to FIG. 4,
  • FIG. 6 represents a perspective view of the magnetic trip device according to FIG. 4.

Les figures 1 à 3 représentent un mode de réalisation de l'invention dans lequel la culasse 1 est fermée afin de réaliser une cage de canalisation de flux. La culasse provient d'une bande métallique pliée et découpée, comme on peut le voir à la figure 2. Cette culasse (voir la figure 1) est destinée à recevoir à l'une de ses extrémités, qui constitue la borne de raccordement 2, une cage de serrage 3 pour le raccordement d'un conducteur d'alimentation non représenté et à son autre extrémité, ci-après appelée face frontale 4, le contact fixe 5 du déclencheur. Cette culasse loge en outre, dans sa partie fermée en cage, l'ensemble de déclenchement électromagnétique, à savoir une bobine à induction 6 à section circulaire associée à un noyau plongeur 7 avec un percuteur 8, ledit noyau plongeur 7 étant rappelé en position de repos par un organe élastique de rappel, en l'occurrence un ressort 9, le noyau plongeur 7 étant guidé dans son déplacement dans une gaine tubulaire 10 en matériau isolant, et le percuteur 8 étant guidé dans un noyau fixe 11 isolé de la culasse 1 et du bobinage 6 par une pièce isolante frontale 18 et par la gaine isolante 10.Figures 1 to 3 show an embodiment of the invention in which the cylinder head 1 is closed in order to produce a flow channeling cage. The cylinder head comes from a folded and cut metal strip, as can be seen in FIG. 2. This cylinder head (see FIG. 1) is intended to receive at one of its ends, which constitutes the connection terminal 2, a clamping cage 3 for the connection of a supply conductor not shown and at its other end, hereinafter called the front face 4, the fixed contact 5 of the trip device. This cylinder head further houses, in its part closed in a cage, the electromagnetic tripping assembly, namely an induction coil 6 with circular section associated with a plunger core 7 with a striker 8, said plunger core 7 being returned to the position of rest by an elastic return member, in this case a spring 9, the plunger core 7 being guided in its movement in a tubular sheath 10 made of insulating material, and the striker 8 being guided in a fixed core 11 isolated from the cylinder head 1 and of the winding 6 by a front insulating part 18 and by the insulating sheath 10.

Comme on peut le voir à la figure 2, la culasse 1 est formée de la bande métallique découpée et pliée, présentant une partie réalisant la borne de raccordement 2. Après un coude à 90°, ladite partie se poursuit par une branche rectiligne 12 qui devient, après un deuxième coude à 90°, un bras de la cage ci-après appelé embase 13. Cette embase présente une portion plus étroite 13a, située immédiatement après le susdit coude à 90° et provenant du découpage d'une zone périphérique de ladite embase 13. Après un nouveau coude à 90°, l'embase 13 se poursuit par la face frontale 4 qui réalise un des flancs de la cage et qui se poursuit, après un coude à 90°, par le deuxième bras 14 de la cage qui s'étend sur toute la longueur de l'embase 13 non réduite en largeur par le susdit découpage. Ce bras 14 se poursuit lui-même, après un nouveau coude à 90°, par le deuxième flanc 15 de la cage et vient en contact avec l'embase 13, au niveau de la partie réduite en largeur de ladite embase 13.As can be seen in FIG. 2, the cylinder head 1 is formed from the cut and folded metal strip, having a part forming the connection terminal 2. After a 90 ° bend, said part continues with a straight branch 12 which becomes, after a second 90 ° bend, an arm of the cage hereinafter called base 13. This base has a narrower portion 13 a , located immediately after the above 90 ° bend and originating from the cutting of a peripheral zone of said base 13. After a new 90 ° bend, the base 13 is continues by the front face 4 which forms one of the sides of the cage and which continues, after a 90 ° bend, by the second arm 14 of the cage which extends over the entire length of the base 13 not reduced by width by the above cutting. This arm 14 continues itself, after a new 90 ° bend, by the second flank 15 of the cage and comes into contact with the base 13, at the level of the part reduced in width of said base 13.

La face frontale 4 est percée d'un orifice 16 destiné à recevoir la pièce isolante frontale 18 et le noyau fixe 11. Le flanc 15 est également percé d'un orifice 17 aligné avec le précédent et destiné à recevoir la gaine isolante 10 et le noyau plongeur 7.The front face 4 is pierced with an orifice 16 intended to receive the front insulating part 18 and the fixed core 11. The sidewall 15 is also pierced with an orifice 17 aligned with the previous one and intended to receive the insulating sheath 10 and the plunger 7.

Après mise en place d'une pièce isolante frontale 18 recouvrant la face frontale 4 et présentant une partie en cylindre creux pénétrant dans l'orifice 16 afin d'isoler le noyau fixe 11 de la culasse 1, l'ensemble de déclenchement, à savoir bobine à induction 6, noyau plongeur 7, percuteur 8, ressort 9 et noyau fixe 11, et la gaine isolante 10 placée entre la bobine à induction et les autres pièces susdites, est placé dans la culasse 1 ; le contact fixe 5 est amené au contact de la partie du noyau fixe 11 dépassant par l'orifice 16 et de la pièce isolante frontale 18, puis le noyau fixe 11 est serti sur la face frontale fixant du même coup le contact fixe 5. L'isolation est assurée par la gaine isolante 10 et la pièce isolante frontale 18, et isole donc le noyau plongeur 7 et le noyau fixe 11 par rapport à la bobine à induction 6 et à la culasse 1, ainsi que la contact fixe 5 par rapport à la culasse 1.After fitting a front insulating part 18 covering the front face 4 and having a hollow cylinder part penetrating into the orifice 16 in order to isolate the fixed core 11 from the cylinder head 1, the triggering assembly, namely induction coil 6, plunger core 7, striker 8, spring 9 and fixed core 11, and the insulating sheath 10 placed between the induction coil and the other aforementioned parts, is placed in the cylinder head 1; the fixed contact 5 is brought into contact with the part of the fixed core 11 protruding through the orifice 16 and the front insulating part 18, then the fixed core 11 is crimped on the front face at the same time fixing the fixed contact 5. L insulation is provided by the insulating sheath 10 and the front insulating part 18, and therefore isolates the plunger core 7 and the fixed core 11 relative to the induction coil 6 and to the cylinder head 1, as well as the fixed contact 5 relative to at the cylinder head 1.

Comme on le voit à la figure 3, une extrémité de la bobine à induction 6 est soudée sur l'embase 13, un découpage approprié du flanc 15 permettant le passage de cette extrémité pour la soudure sur l'embase 13. L'autre extrémité de la bobine à induction 6 est soudée directement sur le contact fixe 5 grâce à un découpage approprié de la face frontale 4.As seen in Figure 3, one end of the induction coil 6 is welded to the base 13, a suitable cutout of the sidewall 15 allowing the passage of this end for welding on the base 13. The other end of the induction coil 6 is soldered directly to the fixed contact 5 thanks to an appropriate cutting of the front 4.

Le contact fixe 5 se prolonge par une électrode de commutation 19 destinée au guidage de l'arc vers une pile de tôles d'extinction d'arc, non représentée. Selon un autre aspect de l'invention, l'électrode de commutation peut être réalisée par découpage d'une languette approprié dans l'embase 13, comme cela sera décrit plus loin.The fixed contact 5 is extended by a switching electrode 19 intended for guiding the arc towards a stack of arc extinguishing sheets, not shown. According to another aspect of the invention, the switching electrode can be produced by cutting out an appropriate tab in the base 13, as will be described later.

Le déclencheur magnétique ainsi décrit, correspond à un mode préféré de réalisation. Il peut être facilement disposé de façon très précise dans un boîtier modulaire, quelque soit le type de bobinage d'induction.The magnetic trigger thus described corresponds to a preferred embodiment. It can be easily and very precisely arranged in a modular housing, whatever the type of induction winding.

Les figures 4 à 6 représentent un autre mode de réalisation de l'invention dans lequel le bobinage à induction est de gros diamètre. Dans ce cas, il n'est pas nécessaire de réaliser une cage de canalisation de flux. D'autre part, le bobinage présente une section carrée. Pour cette raison, le mode de réalisation représenté ne prévoit pas de gaine isolante comme précédemment mais simplement une rondelle isolante 10a pour isoler la face avant du noyau fixe 11 par rapport à la face frontale 4 de l'armature.Figures 4 to 6 show another embodiment of the invention in which the induction winding is of large diameter. In this case, it is not necessary to make a flow channeling cage. On the other hand, the winding has a square section. For this reason, the embodiment shown does not provide an insulating sheath as previously but simply an insulating washer 10a to isolate the front face of the fixed core 11 relative to the front face 4 of the frame.

Le noyau mobile 7, portant son percuteur 8, est guidé par la surface intérieure, sensiblement cylindrique du bobinage 20 et se trouve électriquement isolé par le vernis isolant recouvrant le conducteur dont l'enroulement forme le bobinage.The movable core 7, carrying its striker 8, is guided by the interior, substantially cylindrical surface of the coil 20 and is electrically isolated by the insulating varnish covering the conductor, the winding of which forms the coil.

La culasse 1 présente alors la borne de raccordement 2, la branche rectiligne 12, une embase 21 de largeur constante et la face frontale 4 avec son orifice 16. Pour la mise en place de l'ensemble bobine à induction 6, noyau plongeur 7, percuteur 8, ressort 9 et noyau fixe 11, le noyau fixe 11 est, comme dans le mode de réalisation précédent, serti avec le contact fixe 5 et la pièce isolante frontale 18. Une extrémité de la bobine à induction 20 est soudée à l'embase 21, ce qui rigidifie l'ensemble, l'autre extrémité étant soudée au contact fixe 5 de la même manière que dans le mode de réalisation précédent.The cylinder head 1 then has the connection terminal 2, the straight branch 12, a base 21 of constant width and the front face 4 with its orifice 16. For the installation of the induction coil assembly 6, plunger core 7, striker 8, spring 9 and fixed core 11, the fixed core 11 is, as in the previous embodiment, crimped with the fixed contact 5 and the front insulating part 18. One end of the induction coil 20 is welded to the base 21, which stiffens the assembly, the other end being welded to the fixed contact 5 in the same way than in the previous embodiment.

Dans ce mode de réalisation, l'électrode de commutation est formée par une languette 22 découpée dans l'embase 21, la partie non découpée se situant du côté de la face frontale 4. Cette disposition permet de canaliser d'une façon appropriée l'arc vers la pile de tôles d'extinction d'arc non représentée. Bien entendu, l'électrode de commutation pourrait également être formée par un prolongement du contact fixe 5.In this embodiment, the switching electrode is formed by a tab 22 cut out in the base 21, the uncut part being situated on the side of the front face 4. This arrangement makes it possible to channel the arc towards the stack of arc extinguishing sheets not shown. Of course, the switching electrode could also be formed by an extension of the fixed contact 5.

Dans le cas d'un bobinage à induction à section circulaire de gros diamètre, il serait préférable de prévoir une gaine isolante comme dans le premier mode de réalisation décrit.In the case of a large diameter circular section induction winding, it would be preferable to provide an insulating sheath as in the first embodiment described.

Bien que l'invention ait été décrite à propos de formes de réalisation particulières, il est bien entendu qu'elle n'y est nullement limitée et qu'on peut lui apporter diverses modifications de forme ou de matériau tout en restant dans l'étendue de protection définie par les revendications.Although the invention has been described with regard to particular embodiments, it is understood that it is in no way limited thereto and that it can be made various modifications of shape or material while remaining within the scope of protection defined by the claims.

Claims (7)

  1. A magnetic device for tripping a circuit breaker, comprising a yoke (1), an induction coil (6) one end of which is welded to the yoke (1) and which is associated with a plunger core (7) with a striker (8) and a return spring (9), a fixed contact (5) carried by the yoke (1) and constituting a commutating electrode (19) intended to guide the arc towards a stack of arc extinguishing plates, characterised in that the yoke (1)is formed by being cut from a strip of metal and folded to produce a part in which one end is extended in one piece to form a connecting terminal (2) which is arranged in such a way as to be able to receive a clamping cage (3), and in that the fixed contact (5) is electrically insulated in respect of the yoke (1) and is connected by welding to the other end of the induction coil (6), the magnetic tripping device thus produced forming a rigid assembly which can be placed as one unit in a circuit breaker housing.
  2. A magnetic device for tripping a circuit breaker, comprising a yoke (1), an induction coil (20) one end of which is welded to the yoke (1) and which is associated with a plunger core (7) with a striker (8) and a return spring (9), a fixed contact (5) carried by the yoke (1) and a commutating electrode (22) intended to guide the arc towards a stack of arc extinguishing plates, characterised in that the yoke (1) is formed by being cut from a strip of metal and folded and is extended in one piece to form a connecting a terminal (2) which is arranged in such a way as to be able to receive a clamping cage (3), in that the fixed contact (5) is electrically insulated in respect of the yoke (1) and is connected by welding to the other end of the induction coil (6) and in that the commutating electrode (22) is made by cutting a tongue from the strip forming the yoke (1).
  3. A magnetic tripping device according to claim 1 or 2, characterised in that the fixed contact (5) is fixed on the front face (4) of the yoke (1) through an interposed piece (18) consisting of an insulating material.
  4. A magnetic tripping device according to claim 3, characterised in that the piece made from insulating material and used for insulating the fixed contact (5) in respect of the front face (4) of the yoke (1) is a frontal insulating piece (18) while an insulating sheath (10) encloses the fixed core (11) associated with the plunger core (7) and guides said plunger core (7).
  5. A magnetic tripping device according to claim 4, characterised in that in the case of an induction coil (20) having a large diameter winding of square cross-section, the insulating sheath (10) is replaced by an insulating washer (10a) situated between the front face of the fixed core (11) and the rear face of the front (4) of the yoke (1), the plunger core (7) being guided by the insulated inner surface of the winding.
  6. A magnetic tripping according to one of claims 4 and 5, characterised in that the fixed contact (5) is crimped, with the fixed core (11) associated with the plunger core (7) on the front face (4) of the yoke (1) by riveting of the fixed core (11), the front insulating part (18) being interposed between the fixed contact (5) and the front face (4) of the yoke (1).
  7. A magnetic tripping device according to claim 1 or 2, characterised in that in the case of an induction coil (6) which has a small diameter winding, the yoke (1) is closed in order to make a flux ducting cage.
EP89400804A 1988-03-30 1989-03-22 Tripping magnet for a circuit breaker Expired - Lifetime EP0335774B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400804T ATE99831T1 (en) 1988-03-30 1989-03-22 TRIP MAGNET FOR A CIRCUIT BREAKER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8804170A FR2629633A1 (en) 1988-03-30 1988-03-30 MAGNETIC TRIGGER FOR CIRCUIT BREAKER
FR8804170 1988-03-30

Publications (2)

Publication Number Publication Date
EP0335774A1 EP0335774A1 (en) 1989-10-04
EP0335774B1 true EP0335774B1 (en) 1994-01-05

Family

ID=9364786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400804A Expired - Lifetime EP0335774B1 (en) 1988-03-30 1989-03-22 Tripping magnet for a circuit breaker

Country Status (4)

Country Link
EP (1) EP0335774B1 (en)
AT (1) ATE99831T1 (en)
DE (1) DE68911970T2 (en)
FR (1) FR2629633A1 (en)

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Publication number Priority date Publication date Assignee Title
FR2682533B1 (en) * 1991-10-10 1993-11-26 Merlin Gerin ELECTRIC CIRCUIT BREAKER WITH INSERTION OF MAGNETIC TRIGGER SPIERS.
EP0569652A1 (en) * 1992-05-13 1993-11-18 Hager Electro S.A. Magnetic trip mechanism for circuit breaker, equivalent sub-assembly and circuit breakers incorporating them
DE4309197A1 (en) * 1993-03-22 1994-09-29 Maier & Cie C Line protection circuit breaker
FR2753836B1 (en) * 1996-09-23 1998-10-30 ELECTROMAGNETIC TRIGGER FOR ELECTRIC PROTECTIVE APPARATUS
DE29802348U1 (en) * 1998-02-11 1998-04-23 Siemens AG, 80333 München Electromagnetic current release for an electrical circuit breaker
FR2779567B1 (en) * 1998-06-03 2000-07-13 Hager Electro OPTIMIZED MAGNETIC SUB-ASSEMBLY
DE19845476B4 (en) * 1998-10-02 2004-08-12 Aeg Niederspannungstechnik Gmbh & Co Kg Magnetic system for miniature circuit breakers
EP1463082A1 (en) * 2003-03-26 2004-09-29 Siemens Aktiengesellschaft Electrical switching device
DE102007014174B4 (en) * 2007-03-24 2021-05-12 Johnson Electric Germany GmbH & Co. KG Electric switch
AT509279A1 (en) * 2008-07-31 2011-07-15 Moeller Gebaeudeautomation Gmbh SWITCHGEAR
DE102012111618A1 (en) * 2012-11-29 2014-06-18 Eaton Industries (Austria) Gmbh Circuit breaker with passively heated bimetallic element
DE102016110094B4 (en) * 2016-06-01 2021-03-04 Abb Schweiz Ag Installation switching device with an electromagnetic release
CN107610987B (en) * 2017-09-22 2020-04-24 嘉兴市加控电气设备制造有限公司 Small-sized circuit breaker

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CH616271A5 (en) * 1977-06-27 1980-03-14 Weber Ag Fab Elektro
FR2434473A1 (en) * 1978-08-25 1980-03-21 Legrand Sa MOBILE CIRCUIT BREAKER ARTICULATED BY PIVOT TO A HANGING MEMBER HIMSELF MOBILE
FR2468202B1 (en) * 1979-10-16 1986-03-07 Merlin Gerin MINIATURE ELECTRIC CIRCUIT BREAKER WITH MOLDED HOUSING
DD211668A1 (en) * 1982-11-11 1984-07-18 Elektroinstallation Annaberg V CIRCUIT PROTECTION SWITCH WITH A CONTACT ASSEMBLY CONSTRUCTING A BLOW LOOP
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DE8527361U1 (en) * 1985-09-25 1986-01-09 Lindner Gmbh, Fabrik Elektrischer Lampen Und Apparate, 8600 Bamberg Short-circuit release device
CH670170A5 (en) * 1986-04-07 1989-05-12 Sprecher & Schuh Ag

Also Published As

Publication number Publication date
ATE99831T1 (en) 1994-01-15
DE68911970T2 (en) 1994-07-14
FR2629633A1 (en) 1989-10-06
EP0335774A1 (en) 1989-10-04
DE68911970D1 (en) 1994-02-17

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