EP0295162B1 - Magnetothermal release unit for circuit breaker or differential circuit breaker - Google Patents
Magnetothermal release unit for circuit breaker or differential circuit breaker Download PDFInfo
- Publication number
- EP0295162B1 EP0295162B1 EP88401197A EP88401197A EP0295162B1 EP 0295162 B1 EP0295162 B1 EP 0295162B1 EP 88401197 A EP88401197 A EP 88401197A EP 88401197 A EP88401197 A EP 88401197A EP 0295162 B1 EP0295162 B1 EP 0295162B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- magnetothermal
- elongate arm
- orifice
- arm
- 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
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Classifications
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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
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
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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
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
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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
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
- H01H71/7436—Adjusting the position (or prestrain) of the bimetal
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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
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7463—Adjusting only the electromagnetic mechanism
Definitions
- the present invention relates to a magnetothermal circuit breaker assembly for circuit breakers or differential circuit breakers.
- Circuit breakers for example circuit breakers or differential devices arranged in a modular box and used for the protection of electrical installations, such as for example living space installations, include a more or less complex closing and opening mechanism of contact.
- This mechanism can be actuated, for a sudden opening of the contacts, by an electromagnetic device comprising a coil sensitive to a sudden overcurrent and a plunger core, made of magnetic material such as mild steel, suddenly displaced in the event of an overcurrent, this core being provided with a striker acting on the mechanism to cause the opening and rapid and complete separation of the contacts.
- These devices also have a bimetallic strip thermostatic flow through the same current as the coil and whose deformation is such, when the intensity exceeds the nominal value, that it causes the opening of the contact (s) by also acting on the mechanism.
- patent application FR-A-2 038 288, which served to formulate the preamble of claim 1, describes a magnetic circuit breaker release associated with a bimetallic strip.
- the magnetic yoke is made up of two parts, one of which simultaneously forms an arc guide plate and the other, a mounting plate for a switch mechanism.
- the bimetallic strip straight, is fixed on the cylinder head or in the vicinity thereof, on a metallic connecting piece so that the free end of the bimetallic strip moves away from the cylinder head, and therefore from the part of the mechanism close to the striker.
- a quick release device comprising a magnetic release and a bimetallic strip.
- the latter is directly fixed to the cylinder head body and has a complex shape with a main U-shaped part, making it possible to bring the free end of the bimetallic strip closer to the cylinder head but with less control of the deformations of the bimetallic strip due to its complicated shape.
- the invention proposes to remedy these drawbacks and to provide a magnetothermal circuit breaker with a small footprint and which consists of an extremely small number of parts.
- Another objective of the invention is to channel the magnetic fluxes in the device.
- Another object of the invention is to provide such an assembly which is particularly easy to assemble and mount in an apparatus.
- Another objective of the invention is to produce such an assembly at an extremely low manufacturing price.
- the subject of the invention is a circuit breaker magnetothermal assembly for circuit breakers or differential circuit breakers, comprising a thermal part provided with a bimetallic strip arranged in cantilever and the free end of which is intended to cooperate with an opening mechanism. contacts, and a magnetic part with an induction coil in series with the bimetallic strip and associated with a support or armature, two opposite faces of which are each provided with an orifice aligned along the same axis, the support or armature carrying, at one of the orifices, a fixed pole piece and being associated with the other orifice with a plunger core provided with a striker, said plunger core being movable along said axis with return to the rest position by an elastic return member and cooperating at its front end, forming a movable pole piece, with the fixed pole piece, characterized in that the support or frame is obtained in one piece by cutting e t folding of a flat metal part so as to give the support or frame a cage shape, two opposite faces of which bear said aligne
- the first elongated arm which is the bimetallic strip arm preferably comes from a return of the cage remote from the part of the cage having the orifice associated with the pole piece, this last part advantageously being able to be extended to form the second elongated arm parallel to the first and provided at its end with the adjusting member.
- the support has, from one free end to the other, the second elongated, straight arm, the lower part of which forms one of said two opposite faces of the cage, pierced with said associated orifice to the pole piece, this pole piece can be either fixed for example by crimping, at the level of the orifice, or even obtained directly by local stamping of the support, this face continuing by means of a 90 ° bend, by a first branch continuing itself, after another 90 ° bend, by the other of said two opposite faces also provided with an orifice aligned with the aforementioned orifice, after which a new 90 ° bend determines a second branch parallel to the first branch, the whole thus forming the rectangular cage receiving the winding, the guide piece and the plunger, said second branch being offset from the mean plane of the assembly so as to follow, after a new bend, by said first elongated arm parallel to said second elongated arm, and the free end of which cooperates with said second elongated arm so as to
- the electrical connection between the coil and the support takes place at the level of said second branch, that is to say at a location close to the first elongated arm carrying the bimetallic strip so as to shorten the electrical path in the support.
- the assembly shown in the drawing is intended to be contained in a modular circuit-breaker or differential circuit-breaker box, of which a few housing elements 1 are simply seen. It comprises a support made of mild steel and obtained by stamping and bending from the unfolded blank shown in Figure 4. This support comprises a straight arm 2 whose lower end 3 forms a sidewall (one face) of cage provided with an orifice 4 bordered by a stamped bead 5 on which is crimped a piece polar 6 with its polar surface 7.
- the flank 3 continues with a first branch 8 perpendicular to the arm 2 and which, after a second bend, continues by a new flank 9 parallel to the flank 3 and also provided with a passage of larger diameter aligned with the axis of the orifice 4.
- the support decreases in width and, after a new bend , it forms a second branch 10, parallel to the branch 8 and offset from the mean plane of the assembly so as to be able to pass in front of the arm 2.
- it then forms a second arm 11 which extends from first parallel to the arm 2 then presents, towards its end, an oblique direction 12 making it possible to move its end 13 proper from the free end of the arm 2.
- the end 13 has, in its plane, a reference which brings it in front of the end of the arm 2.
- a screw 15, screwed into the end of the arm 2 presses on the arm 11 and allows d '' move the end 13 of the arm 2 more or less by pivoting the arm 11 around the elbow which connects it to the branch 10. This makes it possible to tilt the rest position of the bimetallic strip more or less and to ensure the adjustment of the device relative to an element 28 of the lock release mechanism.
- a tubular guide sleeve 16 made of insulating material in which a plunger core 17 made of mild steel can move, traversed by a striker 18 in the form of a light alloy rod and the l end can spring out of the orifice 4 surrounded by the pole piece 6 when the core approaches it until it contacts its front pole surface 19 with the surface 7 of the pole piece 6.
- a hairpin spring one of the branches 21 of which cooperates with the end piece 20 and the other branch of which 22 can be blocked by one or more adjustment pads 23.
- the tubular sleeve 16 is surrounded by the turns of the winding 24, of a usual type, one end of which is connected to a contact of the circuit breaker and the other of which, 25, is welded to the branch 10 at a short distance from the arm 11 to ensure the passage of current to the bimetallic strip 14 by limiting the heating.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Non-Reversible Transmitting Devices (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
La présente invention a trait à un ensemble magnétothermique de disjonction pour appareils disjoncteurs ou disjoncteurs différentiels.The present invention relates to a magnetothermal circuit breaker assembly for circuit breakers or differential circuit breakers.
Les disjoncteurs, par exemple appareils disjoncteurs ou appareils différentiels disposés dans un boîtier modulaire et utilisés pour la protection d'installations électriques, telles que par exemple les installations de locaux d'habitation, comportent un mécanisme plus ou moins complexe de fermeture et d'ouverture de contact. Ce mécanisme peut être actionné, pour une ouverture brutale des contacts, par un dispositif électromagnétique comprenant une bobine sensible à une surintensité brutale et un noyau plongeur, en matériau magnétique tel que acier doux, brutalement déplacé en cas d'apparition d'une surintensité, ce noyau étant muni d'un percuteur agissant sur le mécanisme pour provoquer l'ouverture et la séparation rapide et complète des contacts.Circuit breakers, for example circuit breakers or differential devices arranged in a modular box and used for the protection of electrical installations, such as for example living space installations, include a more or less complex closing and opening mechanism of contact. This mechanism can be actuated, for a sudden opening of the contacts, by an electromagnetic device comprising a coil sensitive to a sudden overcurrent and a plunger core, made of magnetic material such as mild steel, suddenly displaced in the event of an overcurrent, this core being provided with a striker acting on the mechanism to cause the opening and rapid and complete separation of the contacts.
Ces appareils possèdent également une bilame thermostatique parcourue par le même courant que la bobine et dont la déformation est telle, lorsque l'intensité dépasse la valeur nominale, qu'elle provoque l'ouverture du ou des contacts en agissant également sur le mécanisme.These devices also have a bimetallic strip thermostatic flow through the same current as the coil and whose deformation is such, when the intensity exceeds the nominal value, that it causes the opening of the contact (s) by also acting on the mechanism.
Ces dispositifs, tant magnétiques que thermiques, sont relativement complexes à réaliser et à assembler. Ils sont également relativement encombrants et volumineux, ce qui est gênant lorsque l'on veut introduire dans un tel appareil disjoncteur des fonctions supplémentaires, électroniques ou autres, qui demandent également de la place.These devices, both magnetic and thermal, are relatively complex to make and assemble. They are also relatively bulky and bulky, which is inconvenient when it is desired to introduce into such a circuit breaker device additional functions, electronic or other, which also require space.
Ainsi, la demande de brevet FR-A-2 038 288, qui a servi à formuler le préambule de la revendication 1, décrit un déclencheur magnétique de disjoncteur associé à une bilame. La culasse magnétique est formée de deux pièces dont l'une forme en même temps une tôle de guidage d'arc et l'autre, une platine de montage d'un mécanisme interrupteur. La bilame, rectiligne, est fixée sur la culasse ou au voisinage de celle-ci, sur une pièce métallique de liaison de sorte que l'extrémité libre de la bilame s'éloigne de la culasse, et donc de la partie de mécanisme proche du percuteur.Thus, patent application FR-A-2 038 288, which served to formulate the preamble of claim 1, describes a magnetic circuit breaker release associated with a bimetallic strip. The magnetic yoke is made up of two parts, one of which simultaneously forms an arc guide plate and the other, a mounting plate for a switch mechanism. The bimetallic strip, straight, is fixed on the cylinder head or in the vicinity thereof, on a metallic connecting piece so that the free end of the bimetallic strip moves away from the cylinder head, and therefore from the part of the mechanism close to the striker.
D'après le certificat d'addition FR-E-82612, on connaît également un dispositif de déclenchement rapide comportant un déclencheur magnétique et une bilame. Cette dernière est directement fixée sur le corps de culasse et présente une forme complexe avec une partie principale en U, permettant de ramener l'extrémité libre de la bilame plus près de la culasse mais avec un moindre contrôle des déformations de la bilame en raison de sa forme compliquée.From the addition certificate FR-E-82612, there is also known a quick release device comprising a magnetic release and a bimetallic strip. The latter is directly fixed to the cylinder head body and has a complex shape with a main U-shaped part, making it possible to bring the free end of the bimetallic strip closer to the cylinder head but with less control of the deformations of the bimetallic strip due to its complicated shape.
En outre, dans ces documents des moyens de réglage de la position de la bilame doivent être prévus, d'une manière classique, sur le boîtier pour le réglage fin de la position de la bilame, ce qui complique l'ensemble.In addition, in these documents means for adjusting the position of the bimetallic strip must be provided, in a conventional manner, on the housing for fine adjustment of the position of the bimetallic strip, which complicates the assembly.
L'invention se propose de remédier à ces inconvénients et de fournir un ensemble de disjonction magnétothermique de faible encombrement et qui soit constitué d'un nombre extrêmement réduit de pièces.The invention proposes to remedy these drawbacks and to provide a magnetothermal circuit breaker with a small footprint and which consists of an extremely small number of parts.
Un autre objectif de l'invention est de canaliser les flux magnétiques dans l'appareil.Another objective of the invention is to channel the magnetic fluxes in the device.
Un autre objectif de l'invention est de fournir un tel ensemble qui soit particulièrement facile à assembler et à monter dans un appareil.Another object of the invention is to provide such an assembly which is particularly easy to assemble and mount in an apparatus.
Un autre objectif de l'invention est de réaliser un tel ensemble à un prix de fabrication extrêmement bas.Another objective of the invention is to produce such an assembly at an extremely low manufacturing price.
L'invention a pour objet un ensemble magnétothermique de disjonction pour appareils disjoncteurs ou disjoncteurs différentiels, comprenant une partie thermique munie d'une bilame disposée en porte-à-faux et dont l'extrémité libre est destinée à coopérer avec un mécanisme d'ouverture de contacts, et une partie magnétique avec une bobine à induction en série avec la bilame et associée à un support ou armature dont deux faces opposées sont pourvues chacune d'un orifice aligné le long d'un même axe, le support ou armature portant, à l'un des orifices, une pièce polaire fixe et étant associé à l'autre orifice à un noyau plongeur muni d'un percuteur, ledit noyau plongeur étant déplaçable selon ledit axe avec rappel en position de repos par un organe élastique de rappel et coopérant par son extrémité antérieure, formant pièce polaire mobile, avec la pièce polaire fixe, caractérisé en ce que le support ou armature est obtenu d'un seul tenant par découpage et pliage d'une pièce métallique plane de façon à conférer au support ou armature une forme de cage dont deux faces opposées portent lesdits orifices alignés et depuis laquelle s'étend, parallèlement auxdites faces opposées, un premier bras allongé faisant partie intégrante dudit support ou armature et portant à son extrémité libre la bilame, de sorte que cette dernière peut s'étendre ensuite sensiblement dans la même direction que le premier bras allongé et en ce que ledit premier bras allongé s'étend parallèlement à un deuxième bras allonge provenant également de la cage et faisant également partie intégrante dudit support ou armature, un organe de réglage coopérant avec lesdits deux bras pour les écarter plus ou moins l'un de l'autre à l'encontre de leur tendance élastique au rapprochement pour régler la position du premier bras allongé, portant la bilame, par rapport au deuxième bras allongé et à un élément du mécanisme.The subject of the invention is a circuit breaker magnetothermal assembly for circuit breakers or differential circuit breakers, comprising a thermal part provided with a bimetallic strip arranged in cantilever and the free end of which is intended to cooperate with an opening mechanism. contacts, and a magnetic part with an induction coil in series with the bimetallic strip and associated with a support or armature, two opposite faces of which are each provided with an orifice aligned along the same axis, the support or armature carrying, at one of the orifices, a fixed pole piece and being associated with the other orifice with a plunger core provided with a striker, said plunger core being movable along said axis with return to the rest position by an elastic return member and cooperating at its front end, forming a movable pole piece, with the fixed pole piece, characterized in that the support or frame is obtained in one piece by cutting e t folding of a flat metal part so as to give the support or frame a cage shape, two opposite faces of which bear said aligned orifices and from which extends, parallel to said opposite faces, a first elongated arm forming an integral part of said support or armature and carrying at its free end the bimetallic strip, so that the latter can then extend substantially in the same direction as the first elongated arm and in that said first elongated arm extends parallel to a second elongated arm also originating from the cage and also forming an integral part of said support or frame, an adjustment member cooperating with said two arms to separate them more or less from each other against their elastic tendency to approach in order to adjust the position of the first elongated arm, carrying the bimetallic strip, relative to the second elongated arm and to an element of the mechanism.
Le premier bras allongé qui est le bras porte-bilame provient, de préférence, d'un retour de la cage éloigné de la partie de cage présentant l'orifice associé à la pièce polaire, cette dernière partie pouvant avantageusement être prolongée pour former le deuxième bras allongé parallèle au premier et muni à son extrémité de l'organe de réglage.The first elongated arm which is the bimetallic strip arm preferably comes from a return of the cage remote from the part of the cage having the orifice associated with the pole piece, this last part advantageously being able to be extended to form the second elongated arm parallel to the first and provided at its end with the adjusting member.
Ainsi, dans une forme de réalisation particulièrement préférée, le support présente, d'une extrémité libre à l'autre, le deuxième bras allongé, rectiligne dont la partie inférieure forme l'une desdites deux faces opposeés de la cage, percée dudit orifice associé à la pièce polaire, cette pièce polaire pouvant être soit fixée par exemple par sertissage, au niveau de l'orifice, soit même obtenue directement par matriçage local du support, cette face se poursuivant par l'intermédiaire d'un coude à 90°, par une première branche se poursuivant elle-même, après un autre coude à 90°, par l'autre desdites deux faces opposeés également munie d'un orifice aligné avec l'orifice précité, après quoi un nouveau coude à 90° détermine une deuxième branche parallèle à la première branche, l'ensemble formant ainsi la cage rectangulaire recevant le bobinage, la pièce de guidage et le noyau plongeur, ladite deuxième branche étant déporteé du plan moyen de l'ensemble de manière à se pour suivre, après un nouveau coude, par ledit premier bras allongé parallèle audit deuxième bras allongé, et dont l'extrémité libre coopère avec ledit deuxième bras allongé de façon à être disposée parallèlement en regard et à faible distance du deuxième bras allongé, l'extrémité de ce premier bras allongé portant la bilame, par exemple par soudure.Thus, in a particularly preferred embodiment, the support has, from one free end to the other, the second elongated, straight arm, the lower part of which forms one of said two opposite faces of the cage, pierced with said associated orifice to the pole piece, this pole piece can be either fixed for example by crimping, at the level of the orifice, or even obtained directly by local stamping of the support, this face continuing by means of a 90 ° bend, by a first branch continuing itself, after another 90 ° bend, by the other of said two opposite faces also provided with an orifice aligned with the aforementioned orifice, after which a new 90 ° bend determines a second branch parallel to the first branch, the whole thus forming the rectangular cage receiving the winding, the guide piece and the plunger, said second branch being offset from the mean plane of the assembly so as to follow, after a new bend, by said first elongated arm parallel to said second elongated arm, and the free end of which cooperates with said second elongated arm so as to be arranged parallel opposite and at a short distance from the second elongated arm, the end of this first elongated arm carrying the bimetallic strip, for example by welding.
De façon avantageuse, la liaison électrique entre la bobine et le support s'effectue au niveau de ladite deuxième branche, c'est-à-dire en un emplacement proche du premier bras allongé portant la bilame de façon à raccourcir le trajet électrique dans le support.Advantageously, the electrical connection between the coil and the support takes place at the level of said second branch, that is to say at a location close to the first elongated arm carrying the bimetallic strip so as to shorten the electrical path in the support.
D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description suivante, faite à titre d'exemple non limitatif et se référant au dessin annexé dans lequel :
- la figure 1 représente une vue schématique en coupe d'un ensemble selon l'invention,
- les figures 2 et 3 représentent deux vues en perspective du support de cet ensemble,
- la figure 4 représente une vue du support découpé avant pliage.
- FIG. 1 represents a schematic sectional view of an assembly according to the invention,
- FIGS. 2 and 3 represent two perspective views of the support of this assembly,
- Figure 4 shows a view of the cut support before folding.
L'ensemble représenté sur le dessin est destiné à être contenu dans un boîtier modulaire de disjoncteur ou de disjoncteur différentiel dont on voit simplement quelques éléments de boîtier 1. Il comporte un support réalisé en acier doux et obtenu par emboutissage et pliage à partir de l'ébauche non pliée représentée sur la figure 4. Ce support comporte un bras rectiligne 2 dont l'extrémité inférieure 3 forme un flanc (une face) de cage muni d'un orifice 4 bordé par un bourrelet embouti 5 sur lequel est sertie une pièce polaire 6 avec sa surface polaire 7.The assembly shown in the drawing is intended to be contained in a modular circuit-breaker or differential circuit-breaker box, of which a few housing elements 1 are simply seen. It comprises a support made of mild steel and obtained by stamping and bending from the unfolded blank shown in Figure 4. This support comprises a
Après un premier coude à angle droit, le flanc 3 se poursuit par une première branche 8 perpendiculaire au bras 2 et qui, après un second coude, se poursuit par un nouveau flanc 9 parallèle au flanc 3 et également pourvu d'un passage de plus grand diamètre aligné sur l'axe de l'orifice 4. A la partie supérieure du flanc 9, le support diminue de largeur et, après un nouveau coude, il forme une deuxième branche 10, parallèle à la branche 8 et déportée du plan moyen de l'ensemble de façon à pouvoir passer devant le bras 2. Après un nouveau coude, il forme alors un deuxième bras 11 qui s'étend d'abord parallèlement au bras 2 puis présente, vers son extrémité, une direction oblique 12 permettant d'éloigner son extrémité 13 proprement dite de l'extrémité libre du bras 2. L'extrémité 13 possède, dans son plan, un renvoi qui l'amène devant l'extrémité du bras 2. Sur cette extrémité 13, et à l'opposé du bras 2, est soudée une bilame usuelle 14. Une vis 15, vissée dans l'extrémité du bras 2, appuie sur le bras 11 et permet d'éloigner plus ou moins l'extrémité 13 du bras 2 par pivotement du bras 11 autour du coude qui le rattache à la branche 10. Ceci permet d'incliner plus ou moins la position de repos de la bilame et d'assurer le réglage du dispositif par rapport à un élément 28 du mécanisme de déclenchement de serrure.After a first bend at a right angle, the
Autour de la pièce polaire 6 et du bourrelet 5, se trouve emmanché un manchon tubulaire de guidage 16 en matière isolante dans lequel peut se déplacer un noyau plongeur 17 en acier doux traversé par un percuteur 18 en forme de tige en alliage léger et dont l'extrémité peut jaillir hors de l'orifice 4 entouré par la pièce polaire 6 lorsque le noyau se rapproche de celle-ci jusqu'au contact de sa surface polaire antérieure 19 avec la surface 7 de la pièce polaire 6. Un embout postérieur 20 destiné à ouvrir une serrure (non représentée) de mécanisme, portant à cet effet une came 27 et qui est solidaire du noyau 17 percutant le porte-contacts 26 pour accélérer la vitesse d'ouverture de contacts, permet à celui-ci d'être sollicité par un ressort en épingle dont l'une des branches 21 coopère avec l'embout 20 et dont l'autre branche 22 peut être bloquée par un ou plusieurs plots 23 de réglage. On voit sur le dessin trois positions possibles de réglage de ce plot.Around the
Le manchon tubulaire 16 est entouré des spires de l'enroulement 24, d'un type usuel, dont une extrémité est reliée à un contact du disjoncteur et dont l'autre, 25, est soudée sur la branche 10 à faible distance du bras 11 pour assurer le passage de courant vers la bilame 14 en limitant l'échauffement.The
Claims (9)
- A magnetothermal circuit-breaking assembly for circuit-breaking equipment or differential circuit-breakers, comprising a thermal part provided with a bimetallic strip (14) disposed cantilever fashion and the free end of which is intended to cooperate with a contact opening mechanism, and a magnetic part with an induction coil (24) in series with the bimetallic strip and associated with a support or frame of which two opposite faces (3, 9) are each provided with an orifice aligned along one and the same axis, the support or frame carrying at one of the orifices a fixed polar member (6) and being associated with the other orifice having a plunger core (17) provided with a striking pin (18), the said plunger core (17) being displaceable in accordance with the said axis and being restored to the rest position by an elastic restoring member (21, 22), its leading end (19) forming a movable polar piece, cooperating with the fixed polar piece (6), characterised in that the support or frame is obtained in a single piece by cutting and folding a flat metal part in order to give the support or frame a cage shape of which two opposite surfaces (3, 9) carry the said aligned orifices and from which extends parallel with the said opposite faces (3, 9) a first elongate arm (11) forming an integral part of the said support or frame and carrying at its free end the bimetallic strip (14) so that this latter is able then to extend substantially in the same direction as the first elongate arm (11) and in that the said first elongate arm (11) extends parallel with a second elongate arm (2) which likewise emanates from the cage and which likewise is an integral part of the said support or frame, a regulating member (15) cooperating with the said two arms (2, 11) to move them apart from each other to a greater or lesser degree against their elastic tendency to move closer in order to regulate the position of the first elongate arm (11) carrying the bimetallic strip (14) in relation to the second elongate strip (2) and an element (28) of the mechanism.
- A magnetothermal assembly according to Claim 1, characterised in that the first elongate arm (11) originates from a return of the cage remote from the part of the cage which comprises the said orifice associated with the fixed polar piece (6).
- A magnetothermal assembly according to Claim 2, characterised in that the cage part having the said orifice associated with the fixed polar piece (6) is directly extended in order to form the said second elongate arm (2) which is provided at its end with the regulating member (15).
- A magnetothermal assembly according to any one of Claims 1 to 3, characterised in that the fixed polar piece (6) is formed by the support.
- A magnetothermal assembly according to Claim 4, characterised in that the fixed polar piece (6) is formed directly by die-stamping into the support.
- A magnetothermal assembly according to any one of Claims 1 to 3, characterised in that the fixed polar piece (6) is fixed by crimping at the level of the said cage orifice associated therewith on a bead (5) obtained in the support.
- A magnetothermal assembly according to any one of Claims 1 to 6, characterised in that from one free end to the other, the support carries the said second elongate arm (2) which is rectilinear and of which the bottom part forms one (3) of the said two opposite faces (3, 9) of the cage, pierced by the said orifice (4) associated with the fixed polar piece (6), this face (3) continuing through a 90° elbow into a first arm (8) which, through another 90° elbow, continues via the other (9) of the said two opposite faces (3, 9) provided with the other orifice which is aligned with the said orifice (4) associated with the fixed polar piece (6), after which a fresh 90° bend defines a second branch (10) parallel with the first (8), the assembly forming the said rectangular cage, the said second arm (10) being offset from the median plane of the assembly so that after a fresh bend, it can be continued by the said first elongate arm (11) parallel with the said second elongate arm (2) and situated outside this latter in relation to the assembly, its free end (13) carrying the bimetallic strip cooperating with the said second elongate arm (2) in order to be disposed parallel opposite and at a slight distance from this latter in order to operate with an adjusting screw (15).
- A magnetothermal assembly according to any one of the preceding Claims, characterised in that the electrical connection between the coil (24) and the support is performed in the vicinity of the said first elongate arm (11) carrying the bimetallic strip (14) in order to shorten the electrical path through the support and restrict heating.
- A magnetothermal assembly according to any one of the preceding Claims, characterised in that a tubular sleeve (16) extends coaxially with the two aligned orifices and the fixed polar piece (6), the said sleeve (16) receiving the plunger core (17) and being enclosed by the coil (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88401197T ATE92210T1 (en) | 1987-06-11 | 1988-05-18 | MAGNETOTHERMAL TRIP UNIT FOR LOAD SWITCH OR DIFFERENTIAL LOAD SWITCH. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8708122 | 1987-06-11 | ||
| FR8708122A FR2616584B1 (en) | 1987-06-11 | 1987-06-11 | CIRCUIT BREAKER ASSEMBLY FOR CIRCUIT BREAKER OR DIFFERENTIAL CIRCUIT BREAKER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0295162A1 EP0295162A1 (en) | 1988-12-14 |
| EP0295162B1 true EP0295162B1 (en) | 1993-07-28 |
Family
ID=9351922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88401197A Expired - Lifetime EP0295162B1 (en) | 1987-06-11 | 1988-05-18 | Magnetothermal release unit for circuit breaker or differential circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0295162B1 (en) |
| AT (1) | ATE92210T1 (en) |
| DE (1) | DE3882601T2 (en) |
| FR (1) | FR2616584B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19935662A1 (en) * | 1999-07-29 | 2001-02-01 | Abb Patent Gmbh | Electromagnetic release |
| US6667675B2 (en) * | 2002-05-01 | 2003-12-23 | Eaton Corporation | Adjustable magnetic trip assembly for circuit breaker |
| DE102004004840B4 (en) * | 2004-01-30 | 2006-05-11 | Siemens Ag | Protection switching device with residual current release |
| DE102008012149A1 (en) * | 2008-03-01 | 2009-09-03 | Abb Ag | switchgear |
| DE102016203508B4 (en) * | 2016-03-03 | 2021-06-10 | Siemens Aktiengesellschaft | Tripping device and electromechanical circuit breaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1413935A1 (en) * | 1961-07-05 | 1969-02-06 | Licentia Gmbh | Circuit breaker |
| FR82612E (en) * | 1962-08-10 | 1964-03-20 | Cie De Construction Electr | Quick release contact device |
| DE6913744U (en) * | 1969-04-05 | 1969-07-24 | Bbc Brown Boveri & Cie | MAGNETIC TRIGGER FOR INSTALLATION SWITCH |
| DE2132780A1 (en) * | 1971-07-01 | 1973-01-11 | Siemens Ag | CIRCUIT BREAKERS, IN PARTICULAR CIRCUIT BREAKERS |
| FR2291603A1 (en) * | 1974-11-15 | 1976-06-11 | Saparel | CURRENT OVERLOAD PROTECTION DEVICE |
-
1987
- 1987-06-11 FR FR8708122A patent/FR2616584B1/en not_active Expired
-
1988
- 1988-05-18 DE DE88401197T patent/DE3882601T2/en not_active Expired - Lifetime
- 1988-05-18 AT AT88401197T patent/ATE92210T1/en not_active IP Right Cessation
- 1988-05-18 EP EP88401197A patent/EP0295162B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2616584B1 (en) | 1989-09-29 |
| EP0295162A1 (en) | 1988-12-14 |
| DE3882601T2 (en) | 1993-11-04 |
| ATE92210T1 (en) | 1993-08-15 |
| DE3882601D1 (en) | 1993-09-02 |
| FR2616584A1 (en) | 1988-12-16 |
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