EP1111643B1 - Magnetic trip device - Google Patents

Magnetic trip device Download PDF

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Publication number
EP1111643B1
EP1111643B1 EP00403539A EP00403539A EP1111643B1 EP 1111643 B1 EP1111643 B1 EP 1111643B1 EP 00403539 A EP00403539 A EP 00403539A EP 00403539 A EP00403539 A EP 00403539A EP 1111643 B1 EP1111643 B1 EP 1111643B1
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EP
European Patent Office
Prior art keywords
magnetic circuit
magnet
coil
tripping device
plate
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
EP00403539A
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German (de)
French (fr)
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EP1111643A1 (en
Inventor
François Ing. Chaudot
Frédéric Ing. Dorschner
Dominique Dessinateur Millot
Daniel Ing. Riffaud
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP1111643A1 publication Critical patent/EP1111643A1/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

Definitions

  • the present invention relates to a magnetic trigger for a switchgear, comprising a fixed magnetic circuit with which a permanent magnet is associated, at least one coil which can be traversed by an electric current and associated with a branch of the circuit for determining a magnetic flux which is a function of the current. , as well as a movable pallet coupled to an actuating part biased by a spring and determining with the fixed magnetic circuit a main flow loop.
  • the document DE 198 20 768 discloses a magnetic trigger in one piece comprising a main magnetic circuit formed of two parallel branches enclosing a permanent magnet and ending with two bearing surfaces against which is supported a movable pallet trigger.
  • the two branches are also connected together forming an auxiliary magnetic circuit.
  • a trip voltage causes a displacement of the magnetic flux of the main circuit to the auxiliary circuit and the release of the pallet under the action of a spring.
  • the document DE 80 24 489 U1 also discloses a magnetic trigger comprising in particular two branches forming on the one hand a main magnetic circuit with a permanent magnet and on the other hand an auxiliary magnetic circuit with a coil, the two branches being separated by a gap.
  • the invention aims to make very reactive a trigger of the type described and simplify the implementation.
  • the magnetic circuit comprises, at the level of the magnet, at least one magnetic flux deflection lug defining a secondary flow loop provided with at least one secondary air gap, and the lug is arranged relative to the magnetic circuit fixed and magnet so that an overcurrent in the coil deflects the flow of the magnet to the secondary loop and thus allows the movement of the actuating part.
  • the magnetic circuit also comprises two identical parallel plates each having on the one hand a main branch carrying a coil and on the other hand a deflection tab, the free ends of the tabs defining two transverse secondary air gaps, and magnet is disposed between the pads at the legs.
  • Each coil may be wound on a U-shaped insulating half-shell enclosing by the wings of the U the short sides of the corresponding plate, so that the coil is immediately adjacent to a lateral face of the plate, the half-shells being assembled to form an insulating structure carrying the coils and containing the platelets.
  • the magnetic trigger shown on the figure 1 is intended to be mounted in a circuit-breaker, contactor-circuit-breaker or similar protective switch-type apparatus and it comprises a magnetic circuit M having a fixed part 10, hereinafter called a fixed magnetic circuit, and a mobile part 11 , hereinafter referred to as a moving pallet; a permanent magnet A is associated with the fixed magnetic circuit 10 to impart to it a permanent magnetic flux.
  • the fixed magnetic circuit 10 comprises two plates 10a, 10b, parallel to each other, of generally flat shape with mean planes Pa, Pb extending in a direction X.
  • the wafers are preferably identical.
  • On the plates 10a, 10b of the fixed magnetic circuit are arranged two respective coils Ca, Cb. These coils are electrically connected in series in a trigger control circuit in order to provide, in case of overcurrent in this circuit, the ampere-turns necessary for the displacement of the pallet 11.
  • the pallet 11 is movable in translation in the X direction and is coupled to an end 12a of an actuating part such as a pusher 12.
  • the pusher is able to actuate a trigger mechanism of the circuit breaker.
  • the link R between the end 12a of the pusher 12 and an associated central recess 11a of the pallet 11 is slightly swiveling, as indicated in FIG. figure 1 , to optimize the gap between the pallet and the fixed circuit.
  • the pusher is biased by a spring 13, for example a compression spring, tending to separate the pallet of the pole ends 14a, 14b of the branches of the fixed magnetic circuit.
  • the palette is applied on the fixed magnetic circuit by the permanent magnet A against the spring force. The occurrence of an overcurrent in the coils causes the pallet 11 to detach from the fixed magnetic circuit 10 and the pusher 12 to move due to the force of the spring 13.
  • Each plate 10a, 10b has on its short sides, between its pole ends 14a, 14b and its ends 15a, 15b opposite the ends 14a, 14b, a recessed portion 16a, 16b which receives the coils Ca, Cb so as to reduce clutter of the trigger.
  • the ends 15a, 15b of the plates 10a, 10b are intended to grip the permanent magnet A and to determine a magnetic flux deflection path T2.
  • the ends 15a, 15b of the plates are shaped in a specific manner and comprise, to form two air gaps, on one side a respective lug 17a, 17b and on the other side a flange 18a, 18b defining the narrowed portion 16a, 16b .
  • each lug 17a, 17b integral with a wafer defines with the opposite flange 18b, 18a of the other wafer a predetermined transverse air gap 20a, 20b.
  • Transverse air gap means that the gap extends in a plane perpendicular to the X direction.
  • the tabs 17a, 17b constitute flux deflecting branches of the magnetic circuit extending or continuing transversely (that is to say, perpendicular to the planes Pa, Pb and in the X direction) the main branches 19a, 19b formed by the plates 10a. , 10b, for channeling the induced magnetic flux in an overcurrent state.
  • the pads thus have a shape L - or small wing and large wing - whose large wing is formed by the main branch and whose small wing is constituted by the leg or secondary branch.
  • the permanent magnet A is inserted between the plates 10a, 10b at the level of the transverse tabs 17a, 17b and flanges 18a, 18b so as to brace the wafers arranged somehow head-to-tail (see figure 3 ); it is seen in this figure that, in cross section, the plates have at their ends 15a, 15b an L-shaped to embrace the magnet A by generating the two air gaps 20a, 20b. It is interesting to have identical pads, which simplifies the realization of the trigger.
  • the coils Ca, Cb are wound half on an insulating half-shell 21a, 21b and half on the respective plate 10a, 10b, so as to be in direct contact with the latter on its inner face (see figure 2 ).
  • the half-shells are U-shaped wrapping wafers 10a, 10b and provide abutments 22a, 22b for shoulders 23a, 23b provided at any suitable place of the wafers.
  • the assembled half-shells constitute a shell or carcass for mounting the coils, this carcass being housed in an insulating body D of the release.
  • the body D has an opening 24 for the pusher 12 and constitutes a support for the spring 13.
  • the described trigger works as follows.
  • the pallet 11 In the absence of overcurrent in the coils Ca, Cb, the pallet 11 is applied to the pole surfaces of the ends 14a, 14b of the magnetic plates 10a, 10b by the permanent magnet A against the force of the spring 13
  • the flow developed by A circulates in a main loop T1 formed by the main branches 19a, 19b of the plates and the pallet 11.
  • the coils develop a magnetic flux which opposes the flow of the permanent magnet and which deviates it to the secondary branches formed by the tabs 17a, 17b; the flux created by the permanent magnet then passes through a deflection loop T2 comprising the tabs 17a, 17b of the plates, the air gaps 20a, 20b and the flanges 18a, 18b of the plates.

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

Description

La présente invention concerne un déclencheur magnétique pour appareil électrique interrupteur, comportant un circuit magnétique fixe auquel est associé un aimant permanent, au moins une bobine pouvant être parcourue par un courant électrique et associée à une branche du circuit pour déterminer un flux magnétique fonction du courant, ainsi qu'une palette déplaçable couplée à une pièce d'actionnement sollicitée par un ressort et déterminant avec le circuit magnétique fixe une boucle de flux principal.The present invention relates to a magnetic trigger for a switchgear, comprising a fixed magnetic circuit with which a permanent magnet is associated, at least one coil which can be traversed by an electric current and associated with a branch of the circuit for determining a magnetic flux which is a function of the current. , as well as a movable pallet coupled to an actuating part biased by a spring and determining with the fixed magnetic circuit a main flow loop.

Le document DE 198 20 768 décrit un déclencheur magnétique en une seule pièce comportant un circuit magnétique principal formé de deux branches parallèles enserrant un aimant permanent et se terminant par deux surfaces d'appui contre lesquelles vient s'appuyer une palette mobile de déclenchement. Les deux branches sont également reliées entre elles formant un circuit magnétique auxiliaire. Une tension de déclenchement entraîne un déplacement du flux magnétique du circuit principal au circuit auxiliaire et la libération de la palette sous l'action d'un ressort.The document DE 198 20 768 discloses a magnetic trigger in one piece comprising a main magnetic circuit formed of two parallel branches enclosing a permanent magnet and ending with two bearing surfaces against which is supported a movable pallet trigger. The two branches are also connected together forming an auxiliary magnetic circuit. A trip voltage causes a displacement of the magnetic flux of the main circuit to the auxiliary circuit and the release of the pallet under the action of a spring.

Le document DE 80 24 489 U1 décrit également un déclencheur magnétique comportant notamment deux branches formant d'une part un circuit magnétique principal avec un aimant permanent et d'autre part un circuit magnétique auxiliaire avec une bobine, les deux branches étant séparées par un interstice.The document DE 80 24 489 U1 also discloses a magnetic trigger comprising in particular two branches forming on the one hand a main magnetic circuit with a permanent magnet and on the other hand an auxiliary magnetic circuit with a coil, the two branches being separated by a gap.

Il est important de pouvoir réaliser un tel déclencheur magnétique de manière que sa palette actionne le mécanisme de déclenchement de l'appareil aussi rapidement que possible, par exemple en quelques dixièmes de milliseconde, en réponse à une surintensité dans la bobine. Il est d'autre part souhaitable que le flux magnétique induit par la surintensité ne conduise pas à une démagnétisation de l'aimant permanent.It is important to be able to realize such a magnetic release so that its pallet actuates the trigger mechanism of the device as quickly as possible, for example in a few tenths of a millisecond, in response to overcurrent in the coil. On the other hand, it is desirable that the magnetic flux induced by the overcurrent does not lead to demagnetization of the permanent magnet.

L'invention a pour but de rendre très réactif un déclencheur du type décrit et d'en simplifier la réalisation.The invention aims to make very reactive a trigger of the type described and simplify the implementation.

Selon l'invention, le circuit magnétique comprend, au niveau de l'aimant, au moins une patte de déviation de flux magnétique définissant une boucle de flux secondaire dotée d'au moins un entrefer secondaire, et la patte est agencée relativement au circuit magnétique fixe et à l'aimant de manière qu'une surintensité dans la bobine dévie le flux de l'aimant vers la boucle secondaire et permet ainsi la mise en mouvement de la pièce d'actionnement.According to the invention, the magnetic circuit comprises, at the level of the magnet, at least one magnetic flux deflection lug defining a secondary flow loop provided with at least one secondary air gap, and the lug is arranged relative to the magnetic circuit fixed and magnet so that an overcurrent in the coil deflects the flow of the magnet to the secondary loop and thus allows the movement of the actuating part.

Selon l'invention, le circuit magnétique comprend aussi deux plaquettes parallèles identiques présentant chacune d'une part une branche principale portant une bobine et d'autre part une patte de déviation, les extrémités libres des pattes définissant deux entrefers secondaires transversaux, et l'aimant est disposé entre les plaquettes au niveau des pattes.According to the invention, the magnetic circuit also comprises two identical parallel plates each having on the one hand a main branch carrying a coil and on the other hand a deflection tab, the free ends of the tabs defining two transverse secondary air gaps, and magnet is disposed between the pads at the legs.

Chaque bobine peut être enroulée sur une demi-coquille isolante à section en U enveloppant par les ailes du U les petits côtés de la plaquette correspondante, de sorte que la bobine est immédiatement adjacente à une face latérale de la plaquette, les demi-coquilles étant assemblées de manière à former une structure isolante portant les bobines et contenant les plaquettes.Each coil may be wound on a U-shaped insulating half-shell enclosing by the wings of the U the short sides of the corresponding plate, so that the coil is immediately adjacent to a lateral face of the plate, the half-shells being assembled to form an insulating structure carrying the coils and containing the platelets.

La description va être faite ci-après d'un mode de réalisation non limitatif de l'invention, en regard des dessins annexés.

  • La figure 1 est une élévation en coupe d'un déclencheur conforme à l'invention.
  • La figure 2 en est une vue de dessus en coupe selon le plan II-II.
  • La figure 3 est une coupe selon le plan III-III.
  • La figure 4 montre en perspective et à grande échelle le circuit magnétique du déclencheur.
  • La figure 5 est une vue en perspective éclatée du déclencheur.
The description will be made hereinafter of a non-limiting embodiment of the invention, with reference to the accompanying drawings.
  • The figure 1 is a sectional elevation of a trigger according to the invention.
  • The figure 2 is a top view in section along the plane II-II.
  • The figure 3 is a section on the plane III-III.
  • The figure 4 shows in perspective and on a large scale the magnetic circuit of the trigger.
  • The figure 5 is an exploded perspective view of the trigger.

Le déclencheur magnétique illustré sur la figure 1 est destiné à être monté dans un disjoncteur, contacteur-disjoncteur ou appareil interrupteur analogue à fonction de protection et il comprend un circuit magnétique M doté d'une partie fixe 10, appelée ci-après circuit magnétique fixe, et d'une partie mobile 11, appelée ci-après palette mobile ; un aimant permanent A est associé au circuit magnétique fixe 10 pour lui impartir un flux magnétique permanent. Le circuit magnétique fixe 10 comprend deux plaquettes 10a,10b, parallèles entre elles, de forme générale plate avec des plans moyens Pa,Pb s'étendant selon une direction X. Les plaquettes sont de préférence identiques. Sur les plaquettes 10a,10b du circuit magnétique fixe sont disposées deux bobines respectives Ca,Cb. Ces bobines sont montées électriquement en série dans un circuit de commande du déclencheur afin de fournir, en cas de surintensité dans ce circuit, les ampères-tours nécessaires au déplacement de la palette 11.The magnetic trigger shown on the figure 1 is intended to be mounted in a circuit-breaker, contactor-circuit-breaker or similar protective switch-type apparatus and it comprises a magnetic circuit M having a fixed part 10, hereinafter called a fixed magnetic circuit, and a mobile part 11 , hereinafter referred to as a moving pallet; a permanent magnet A is associated with the fixed magnetic circuit 10 to impart to it a permanent magnetic flux. The fixed magnetic circuit 10 comprises two plates 10a, 10b, parallel to each other, of generally flat shape with mean planes Pa, Pb extending in a direction X. The wafers are preferably identical. On the plates 10a, 10b of the fixed magnetic circuit are arranged two respective coils Ca, Cb. These coils are electrically connected in series in a trigger control circuit in order to provide, in case of overcurrent in this circuit, the ampere-turns necessary for the displacement of the pallet 11.

La palette 11 est déplaçable en translation dans la direction X et elle est couplée à une extrémité 12a d'une pièce d'actionnement telle qu'un poussoir 12. Le poussoir est apte à actionner un mécanisme de déclenchement du disjoncteur. La liaison R entre l'extrémité 12a du poussoir 12 et un évidement central associé 11a de la palette 11 est légèrement rotulante, comme indiqué sur la figure 1, pour optimiser l'entrefer entre la palette et le circuit fixe. Le poussoir est sollicité par un ressort 13, par exemple un ressort de compression, tendant à séparer la palette des extrémités polaires 14a,14b des branches du circuit magnétique fixe. La palette est appliquée sur le circuit magnétique fixe par l'aimant permanent A contre l'effort du ressort. L'apparition d'une surintensité dans les bobines entraîne le décollement de la palette 11 vis à vis du circuit magnétique fixe 10 et le déplacement du poussoir 12 grâce à l'effort du ressort 13.The pallet 11 is movable in translation in the X direction and is coupled to an end 12a of an actuating part such as a pusher 12. The pusher is able to actuate a trigger mechanism of the circuit breaker. The link R between the end 12a of the pusher 12 and an associated central recess 11a of the pallet 11 is slightly swiveling, as indicated in FIG. figure 1 , to optimize the gap between the pallet and the fixed circuit. The pusher is biased by a spring 13, for example a compression spring, tending to separate the pallet of the pole ends 14a, 14b of the branches of the fixed magnetic circuit. The palette is applied on the fixed magnetic circuit by the permanent magnet A against the spring force. The occurrence of an overcurrent in the coils causes the pallet 11 to detach from the fixed magnetic circuit 10 and the pusher 12 to move due to the force of the spring 13.

Chaque plaquette 10a,10b présente sur ses petits côtés, entre ses extrémités polaires 14a,14b et ses extrémités 15a,15b opposées aux extrémités 14a,14b, une partie en retrait 16a,16b qui reçoit les bobines Ca,Cb de façon à réduire l'encombrement du déclencheur. Les extrémités 15a,15b des plaquettes 10a,10b sont destinées à enserrer l'aimant permanent A et à déterminer un trajet T2 de déviation du flux magnétique. Les extrémités 15a,15b des plaquettes sont conformées d'une manière spécifique et comprennent, pour former deux entrefers, d'un côté une patte respective 17a,17b et de l'autre côté un rebord 18a,18b délimitant la partie rétrécie 16a,16b. L'extrémité libre de chaque patte 17a,17b solidaire d'une plaquette définit avec le rebord opposé 18b,18a de l'autre plaquette un entrefer transversal prédéterminé 20a,20b. "Entrefer transversal" signifie que l'entrefer s'étend dans un plan perpendiculaire à la direction X.Each plate 10a, 10b has on its short sides, between its pole ends 14a, 14b and its ends 15a, 15b opposite the ends 14a, 14b, a recessed portion 16a, 16b which receives the coils Ca, Cb so as to reduce clutter of the trigger. The ends 15a, 15b of the plates 10a, 10b are intended to grip the permanent magnet A and to determine a magnetic flux deflection path T2. The ends 15a, 15b of the plates are shaped in a specific manner and comprise, to form two air gaps, on one side a respective lug 17a, 17b and on the other side a flange 18a, 18b defining the narrowed portion 16a, 16b . The free end of each lug 17a, 17b integral with a wafer defines with the opposite flange 18b, 18a of the other wafer a predetermined transverse air gap 20a, 20b. "Transverse air gap" means that the gap extends in a plane perpendicular to the X direction.

Les pattes 17a,17b constituent des branches de déviation de flux du circuit magnétique prolongeant ou poursuivant transversalement (c'est-à-dire perpendiculairement aux plans Pa,Pb et à la direction X) les branches principales 19a,19b formées par les plaquettes 10a, 10b, pour canaliser en état de surintensité le flux magnétique induit. Les plaquettes offrent ainsi une forme en L - ou à petite aile et grande aile - dont la grande aile est constituée par la branche principale et dont la petite aile est constituée par la patte ou branche secondaire. L'aimant permanent A est inséré entre les plaquettes 10a,10b au niveau des pattes transversales 17a,17b et des rebords 18a,18b de manière à entretoiser les plaquettes disposées en quelque sorte tête-bêche (voir figure 3) ; on voit sur cette figure que, en coupe transversale, les plaquettes offrent à leurs extrémités 15a,15b une forme en L pour embrasser l'aimant A en engendrant les deux entrefers 20a,20b. II est intéressant d'avoir des plaquettes identiques, ce qui simplifie la réalisation du déclencheur.The tabs 17a, 17b constitute flux deflecting branches of the magnetic circuit extending or continuing transversely (that is to say, perpendicular to the planes Pa, Pb and in the X direction) the main branches 19a, 19b formed by the plates 10a. , 10b, for channeling the induced magnetic flux in an overcurrent state. The pads thus have a shape L - or small wing and large wing - whose large wing is formed by the main branch and whose small wing is constituted by the leg or secondary branch. The permanent magnet A is inserted between the plates 10a, 10b at the level of the transverse tabs 17a, 17b and flanges 18a, 18b so as to brace the wafers arranged somehow head-to-tail (see figure 3 ); it is seen in this figure that, in cross section, the plates have at their ends 15a, 15b an L-shaped to embrace the magnet A by generating the two air gaps 20a, 20b. It is interesting to have identical pads, which simplifies the realization of the trigger.

Les bobines Ca,Cb sont enroulées pour moitié sur une demi-coquille isolante 21a,21b et pour moitié sur la plaquette respective 10a, 10b, de manière à être ainsi au contact direct de celle-ci sur sa face interne (voir figure 2). Les demi-coquilles ont une forme de U enveloppant les plaquettes 10a, 10b et offrent des butées 22a,22b pour des épaulements 23a,23b prévus en tout endroit convenable des plaquettes. Les demi-coquilles assemblées constituent une coquille ou carcasse de montage des bobines, cette carcasse étant logée dans un corps isolant D du déclencheur. Le corps D est doté d'une ouverture 24 pour le poussoir 12 et constitue un appui pour le ressort 13.The coils Ca, Cb are wound half on an insulating half-shell 21a, 21b and half on the respective plate 10a, 10b, so as to be in direct contact with the latter on its inner face (see figure 2 ). The half-shells are U-shaped wrapping wafers 10a, 10b and provide abutments 22a, 22b for shoulders 23a, 23b provided at any suitable place of the wafers. The assembled half-shells constitute a shell or carcass for mounting the coils, this carcass being housed in an insulating body D of the release. The body D has an opening 24 for the pusher 12 and constitutes a support for the spring 13.

Le déclencheur décrit fonctionne de la manière suivante.The described trigger works as follows.

En l'absence de surintensité dans les bobines Ca,Cb, la palette 11 est appliquée sur les surfaces polaires des extrémités 14a,14b des plaquettes magnétiques 10a, 10b par l'aimant permanent A à l'encontre de l'effort du ressort 13. Le flux développé par A circule dans une boucle principale T1 formée par les branches principales 19a,19b des plaquettes et la palette 11. En cas de surintensité, les bobines développent un flux magnétique qui s'oppose au flux de l'aimant permanent et qui dévie celui-ci vers les branches secondaires constituées par les pattes 17a,17b ; le flux créé par l'aimant permanent passe alors dans une boucle de déviation T2 comprenant les pattes 17a,17b des plaquettes, les entrefers 20a,20b et les rebords 18a,18b des plaquettes. Il n'y a donc pas de démagnétisation de l'aimant permanent et le ressort 13 fournit un effort supérieur à celui provenant de la magnétisation résiduelle aux extrémités 14a,14b des plaquettes métalliques 10a et 10b, ce qui met en mouvement le poussoir 12 de manière très rapide. La configuration particulièrement compacte du circuit magnétique fixe avec son aimant de polarisation permet de réduire les dimensions de la palette et de la rendre plus légère, ce qui rend le déclencheur plus réactif. L'architecture symétrique du déclencheur rend sa réalisation et son montage particulièrement simples.In the absence of overcurrent in the coils Ca, Cb, the pallet 11 is applied to the pole surfaces of the ends 14a, 14b of the magnetic plates 10a, 10b by the permanent magnet A against the force of the spring 13 The flow developed by A circulates in a main loop T1 formed by the main branches 19a, 19b of the plates and the pallet 11. In case of overcurrent, the coils develop a magnetic flux which opposes the flow of the permanent magnet and which deviates it to the secondary branches formed by the tabs 17a, 17b; the flux created by the permanent magnet then passes through a deflection loop T2 comprising the tabs 17a, 17b of the plates, the air gaps 20a, 20b and the flanges 18a, 18b of the plates. There is therefore no demagnetization of the permanent magnet and the spring 13 provides a force greater than that resulting from the residual magnetization at the ends 14a, 14b of the metal plates 10a and 10b, which sets the pusher 12 in motion. very fast way. The particularly compact configuration of the fixed magnetic circuit with its bias magnet reduces the dimensions of the pallet and makes it lighter, which makes the trigger more responsive. The symmetrical architecture of the trigger makes its realization and its assembly particularly simple.

Claims (7)

  1. Magnetic tripping device for an electrical switch appliance, comprising a fixed magnetic circuit (10) with which there are associated a permanent magnet (A), at least one coil (Ca, Cb) that can be passed through by an electrical current and associated with a branch (10a, 10b) of the circuit to determine a magnetic flux dependent on the current, and a movable vane (11) coupled to an actuating part (12) stressed by a spring (13) and determining with the fixed magnetic circuit a main flux loop (T1), the magnetic circuit (10) comprising, level with the magnet (A), at least one magnetic flux deflection tab (17a, 17b) defining a secondary flux loop (T2) provided with at least one secondary air gap (20a, 20b), the tab being arranged relative to the fixed magnetic circuit (10) and to the magnet (A) so that an overcurrent in the coil deflects the flux from the magnet to the secondary loop (T2), so enabling the actuating part (12) to be moved,
    characterized in that:
    - the magnetic circuit comprises two parallel plates (10a, 10b) each having a main branch (19a, 19b) and a deflection tab (17a, 17b), the free ends of the tabs defining two transverse secondary air gaps (20a, 20b), and in that
    - the magnet (A) is positioned between the plates level with the tabs.
  2. Tripping device according to Claim 1, characterized in that the plates (10a, 10b) of the magnetic circuit are identical and that the tab (17a, 17b) of a plate is oriented transversely to the branch (19a, 19b) and extends to the other plate, being separated from the latter by the secondary air gap (20a, 20b).
  3. Tripping device according to Claim 1, characterized in that with each plate (10a, 10b), there is associated a coil (Ca, Cb).
  4. Tripping device according to Claim 1, characterized in that each plate (10a, 10b) presents a polar end (14a, b) and an opposite end (15a, b) adjacent to the magnet (A), and small sides offering between the ends (14a, b; 15a, b) a cutaway (16a, 16b) for the passage of the windings of the respective coil (Ca, Cb).
  5. Tripping device according to Claim 3, characterized in that each coil (Ca, Cb) is wound on a U-section insulating half-shell (21a, 21b), the wings of the U of which enclose the small sides of the corresponding plate, so that the coil is immediately adjacent to a lateral face of the plate, the half-shells being joined to form an insulating structure supporting the coils and containing the plates.
  6. Tripping device according to Claim 5, characterized in that the insulating structure defines application abutments (22a, 22b) for the branches of the magnetic circuit, these abutments forming a common reference plane for the vane.
  7. Tripping device according to Claim 1, characterized in that the vane (11) is linked by a ball-jointed link (R) to the actuating part (12) that can be moved translation-wise and is stressed by the spring (13).
EP00403539A 1999-12-20 2000-12-15 Magnetic trip device Expired - Lifetime EP1111643B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9916310A FR2802702B1 (en) 1999-12-20 1999-12-20 MAGNETIC TRIGGER
FR9916310 1999-12-20

Publications (2)

Publication Number Publication Date
EP1111643A1 EP1111643A1 (en) 2001-06-27
EP1111643B1 true EP1111643B1 (en) 2008-06-18

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Family Applications (1)

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EP00403539A Expired - Lifetime EP1111643B1 (en) 1999-12-20 2000-12-15 Magnetic trip device

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US (1) US6472964B2 (en)
EP (1) EP1111643B1 (en)
DE (1) DE60039222D1 (en)
ES (1) ES2304342T3 (en)
FR (1) FR2802702B1 (en)

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Publication number Priority date Publication date Assignee Title
US10523180B2 (en) 2016-03-11 2019-12-31 Akoustis, Inc. Method and structure for single crystal acoustic resonator devices using thermal recrystallization

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8024489U1 (en) * 1980-09-12 1980-12-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Release, especially holding magnet release for residual current circuit breakers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051370B (en) * 1958-01-14 1959-02-26 Siemens Ag Residual current circuit breaker
GB2109165B (en) * 1981-05-01 1985-01-30 Ledex Inc Trip solenoid
DE19820768A1 (en) * 1998-05-08 1999-11-11 Siemens Ag Holder magnet trigger device for protection switch gear, esp. for fault current circuit breaker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8024489U1 (en) * 1980-09-12 1980-12-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Release, especially holding magnet release for residual current circuit breakers

Also Published As

Publication number Publication date
ES2304342T3 (en) 2008-10-16
DE60039222D1 (en) 2008-07-31
EP1111643A1 (en) 2001-06-27
FR2802702B1 (en) 2002-02-01
US20020050879A1 (en) 2002-05-02
US6472964B2 (en) 2002-10-29
FR2802702A1 (en) 2001-06-22

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