EP2402973B1 - Electromagnetic tripping device for electric switchgear, electric switchgear comprising such a tripping device - Google Patents

Electromagnetic tripping device for electric switchgear, electric switchgear comprising such a tripping device Download PDF

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Publication number
EP2402973B1
EP2402973B1 EP11354023A EP11354023A EP2402973B1 EP 2402973 B1 EP2402973 B1 EP 2402973B1 EP 11354023 A EP11354023 A EP 11354023A EP 11354023 A EP11354023 A EP 11354023A EP 2402973 B1 EP2402973 B1 EP 2402973B1
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EP
European Patent Office
Prior art keywords
magnetic
radial
calibrated
calibrated element
shell
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EP11354023A
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German (de)
French (fr)
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EP2402973A1 (en
Inventor
Jean-Claude Ramirez
Pierre Bussieres
Bernard Loiacono
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP2402973A1 publication Critical patent/EP2402973A1/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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/01—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions

Definitions

  • the present invention relates to an electromagnetic release for a switchgear, comprising a magnetic circuit consisting of a yoke, a fixed core and a movable core sliding under the action of a coil.
  • the movable core has a radial crown separating a first portion and a second portion of different radial sections, the yoke having a radial face having an opening traversed by the first portion of the movable core.
  • the present invention also relates to an electric switch protection device having at least one movable contact cooperating with at least one fixed contact.
  • the use of electromagnetic release in electrical devices protective switches is described in particular in the documents FR2779567 , EP0501844 .
  • the electromagnetic trip units are responsible for rapidly opening the electrical contacts of a switch device in the event of an electrical overload, typically when the current rises above a predetermined magnetic trip threshold, for example thirteen times the rated current.
  • they include an electromagnet, sometimes called striker, whose coil is traversed by the current to control.
  • the moving core of the striker stores energy as the ampere-turns increase in the coil and, when the current exceeds the tripping threshold, suddenly releases this energy, so as to be able to separate efficiently and quickly mobile contacts of the fixed contacts of the device.
  • the disadvantage of the existing devices is that the level of the magnetic tripping threshold is generally difficult to adjust and reproduce from one device to another, while the value of this threshold is obviously important for the device to guarantee the security of property and people.
  • To obtain a reliable and reproducible tripping threshold it is necessary to reduce the manufacturing tolerances in order to maintain a high precision of the dimensions and magnetic bonding zones between fixed and moving elements, requiring a possible correction, which penalizes the manufacture and the cost of such subsets.
  • the solution described in the applicant's patent application EP1583130B1 aims to find a simple and economical solution that allows on the one hand to effectively guide the movable core of the striker to ensure its smooth sliding throughout the race while keeping its precise positioning with respect to fixed elements, such as the breech of the striker.
  • Another object of the invention is to be able to easily adjust the magnetic tripping threshold for a given size by eliminating disparities in the dimensions of the different parts and without the need to add additional elements, such as air gap rings. especially.
  • the solution also avoids complicating the manufacture of parts, in particular the shape of the mobile core.
  • the electromagnetic release comprises a magnetic circuit consisting of a yoke 10, a fixed core 39 and a movable core 30 sliding along a longitudinal axis Y inside an insulating sheath 20 between a triggered position and a rest position under the action of an induction coil 25 disposed around the sheath 20.
  • the movable core 32 has a radial ring 33 separating a first portion and a second portion of different radial section.
  • the yoke 10 has a radial face 11 substantially perpendicular to the Y axis with a centered opening 19 on the Y axis and traversed by the first portion 31 of the core. 30.
  • said opening 19 comprises a fluted periphery composed of a plurality of teeth 17 directed towards the Y axis, hollow zones 15 located between each tooth receiving one end of the insulating sheath.
  • the superposition of the radial crown 33 of the movable core 31 and the teeth 17 of the opening 19 of the radial face 11 form, in the rest position, a flow transfer surface allowing the circulation of an axial magnetic flux.
  • the invention therefore aims to overcome the drawbacks of the state of the art, so as to provide a protection switch incorporating an adjustable trigger magnetothermic subset.
  • the electromagnetic release according to the invention comprises intermediate means of adjustment of said flux transfer surface positioned between the movable core and the radial face of the yoke, said intermediate adjustment means comprising two calibrated elements contiguous face-to-face and constituted respectively alternating magnetic and non-magnetic sectors.
  • a displacement of a first calibrated element relative to a second calibrated element makes it possible to obtain the variation of the magnetic flux transfer surface.
  • a first calibrated element is integrated with the radial face of the yoke at the opening comprising a corrugated rim composed of a plurality of teeth and hollow areas located between each tooth.
  • a second calibrated element is positioned between the movable core and the cylinder head, a displacement of said second calibrated element making it possible to obtain the variation of the magnetic flux transfer surface between the core and the cylinder head via the magnetic sectors of the first calibrated element positioned in position. contact with the magnetic sectors of the second calibrated element.
  • the hollow areas located between each tooth receive an end of an insulating sheath, said end of the sheath having a plurality of axial protuberances held by wedging in the hollow areas of the opening.
  • a first calibrated element is integrated in the radial ring of the mobile core, a second calibrated element being positioned between the movable core and the cylinder head, a displacement of one of the two calibrated elements with magnetic sectors. to obtain the variation of the magnetic flux transfer surface between the core and the cylinder head via the magnetic sectors of the first calibrated element positioned in contact with the magnetic sectors of the second calibrated element.
  • the radial ring has a plurality of teeth, hollow areas being located between each tooth.
  • the second calibrated element is integrated with the radial face of the yoke at the opening comprising a corrugated rim composed of a plurality of teeth, hollow zones being located between each tooth.
  • the hollow zones located between each tooth receive an end of an insulating sheath, said end of the sheath comprising a plurality of axial protuberances held by wedging in the hollow areas of the opening.
  • the intermediate adjustment means comprise means for blocking the first circular calibrated element by compared to a second circular calibrated element.
  • all the magnetic sectors have equal areas, the magnetic sectors having the same surface as the non-magnetic sectors.
  • the electrical switch device comprises an electromagnetic trigger as defined above and acting on the movable contact (s).
  • an electromagnetic release is intended to control a power current flowing in a switch device and to trigger suddenly when this current exceeds a certain threshold, called trigger threshold.
  • the striker electromagnetic trigger 39 comprises a magnetic circuit consisting of a magnetic yoke 10, a fixed core 39 and a movable core 30 which are made of ferromagnetic material.
  • the fixed core 39 and the movable core 30 are aligned along a longitudinal axis Y.
  • the two cores are preferably surrounded by an insulating cylindrical sheath 20.
  • the movable core 30 slides preferably inside this insulating sheath 20 along the longitudinal axis Y between a rest position, schematized in FIG. figure 3 , and a triggered position, schematized in figure 4 .
  • the movable core 30 moves under the action of an induction coil disposed around the insulating sheath 20.
  • the intensity of the current to be controlled flowing in the coil 25 exceeds the trigger threshold, the moving core then moves quickly from the rest position to the triggered position.
  • a return member such as a return spring 29, brings the movable core 30 to its rest position.
  • the mobile core is composed of a first portion 31 and a second portion 32 juxtaposed towards the fixed core 39.
  • the first and second portions 31, 32 are cylindrical.
  • the first and second cylindrical portions 31, 32 have a different radial section, in this case the diameter of the portion 31 is smaller than that of the portion 32.
  • the diameter of the second portion 32 is substantially equal to that of the fixed core 39 Parts 31 and 32 are therefore separated by a flange of the part 32 which thus forms a radial crown 33.
  • the movable core 30 having a radial ring 33 separating a first portion 31 and a second portion 32 of different radial section.
  • the yoke 10 having a radial face 11 substantially perpendicular to the Y axis with an opening 19 centered on the Y axis and traversed by the first portion 31 of the movable core 30.
  • the superposition, at the opening 19, the radial crown 33 of the movable core 30 and the radial face 11 of the yoke 10 forms, in the rest position, a magnetic flux transfer surface allowing the circulation of an axial magnetic flux 5
  • the diameter of the second portion 32 is adjusted to just slide inside the cylindrical sheath 20 without creating play.
  • the movable core 30 also comprises a striker member 35, for example placed in the extension of the first part 31, which is responsible for transmitting the movement of the movable core to the (or the) mobile contact (s) of the switch device, in order to (s) separate (or) fixed contact (s) corresponding (s), when the movable core 30 goes into the triggered position.
  • a striker member 35 for example placed in the extension of the first part 31, which is responsible for transmitting the movement of the movable core to the (or the) mobile contact (s) of the switch device, in order to (s) separate (or) fixed contact (s) corresponding (s), when the movable core 30 goes into the triggered position.
  • the magnetic yoke 10 as shown in figure 5 forms a substantially rectangular frame surrounding the coil 25 and the sheath 20, composed of two longitudinal planes 13, 14 substantially parallel to the Y axis, surrounded by two radial faces 11, 12 substantially perpendicular to the Y axis.
  • the fixed core 39 is attached to one of the radial faces 12.
  • the other radial face 11 has a radial opening 19 centered on the Y axis and traversed by the first portion 31 of the movable core 10.
  • the diameter of the second portion 32 of the core mobile is sufficiently important to prevent it from crossing the opening 19.
  • a magnetic magnetic striker type subassembly is as follows. In the absence of current in the coil 25, the movable core 30 is held by the small return spring 29 in the rest position (see figure 3 ), which removes it from the fixed core 39. In this position, the radial ring 33 is pressed against the radial face 11 of the yoke 10, thus creating the magnetic flux transfer surface. When a current begins to flow in the coil 25, a magnetic field is created passing from the fixed core 39 to the yoke 12, 13, 14, 11 and preferably passing from the radial face 11 directly to the radial ring 33 in the axial direction, as represented by the arrows 5 of the figure 3 .
  • the axial gap existing between the radial face 11 and the radial ring 33 is smaller than the fixed radial gap between the radial face 11 and the circumference of the first portion 31 of the movable core 30.
  • the core Mobile 30 thus undergoes a force of attraction towards the fixed core 39 but also an opposite retaining force directed towards the radial face 11 of the magnetic yoke.
  • the retaining force is preponderant and the movable core 30 remains substantially immobile, the axial air gap being always less than the radial gap.
  • the electromagnetic trip unit 39 comprises means allowing a setting of the magnetic trip threshold via the adjustment of the magnetic flux transfer surface allowing the circulation of an axial magnetic flux 5.
  • the electromagnetic trip unit comprises intermediate adjustment means 40 of said magnetic flux transfer surface positioned respectively between the movable core 30 and the opening 19. The superposition of the radial ring 33 of the movable core 30, intermediate adjustment means 40 and the face radial 11 of the cylinder head 10 forms, in the rest position, the radial flow transfer surface.
  • Said intermediate adjustment means 40 comprising two calibrated elements 41 contiguous face-to-face.
  • the two calibrated elements 41 are circular and comprise an axis of revolution coincident with the longitudinal axis Y.
  • Each calibrated element 41 consists respectively of alternating magnetic sectors 43A and non-magnetic sectors 43B.
  • a displacement of a first calibrated element relative to a second calibrated element makes it possible to vary the radial magnetic flux transfer surface between the cylinder head 10 and the mobile core 30.
  • the displacement of a calibrated element by relative to another calibrated element makes it possible to adjust the reluctance of the magnetic circuit and thereby the retaining force of the movable core 30. This allows in fine to set the desired magnetic thresholding.
  • a first calibrated element 41 is integrated with the radial face 11 of the yoke 10 at the opening 19.
  • the radial opening 19 comprises a grooved inner periphery consisting of a plurality N of teeth 17 directed towards the longitudinal axis Y, distributed around this periphery. Hollow areas 15 are then located between each tooth 17. Each tooth 17 then plays the role of a magnetic sector 43A and each hollow zone 15 then plays the role of a non-magnetic sector 43B.
  • the second calibrated element 41 is then positioned between the movable core 30 and the cylinder head 10.
  • the second calibrated element 41 is preferably circular and is preferably composed of a washer intended to be positioned on the radial ring 33 of the movable core 30.
  • the washer is then composed of an alternation of N magnetic sector 43A and N non-magnetic sectors 43B. Rotation of said second calibrated magnetic sector element makes it possible to obtain the variation of the magnetic flux transfer surface between the core 30 and the cylinder head 10 via the magnetic sectors 43A of the first calibrated element positioned in contact with the magnetic sectors 43A of the second calibrated element.
  • the hollow zones 15 located between each tooth 17 receive one end of the insulating sheath 20, said end of the sheath 20 having a plurality N of axial protuberances held by wedging in the hollow zones 15 of the opening 19 .
  • the dimensions of the teeth 17 are designed so that the first portion 31 of the movable core 30 can pass freely through the opening 19 in the interior space between the teeth 17, but so that the teeth 17 can retain the second part 32.
  • the radial ring 33 is pressed against the teeth 17, thus creating a very small axial gap.
  • the flow transfer surface is discontinuous because of the corrugated periphery of the opening 19, which avoids having too great a retaining force applied to the movable core 30 by the axial magnetic flux 5. This discontinuity will also allow more very simply adjust the restraining force.
  • this avoids the need to add extra high precision shims or rings to increase the axial air gap between the radial ring 33 and the teeth 17.
  • the teeth 17 each have a leading edge 18 directed towards the longitudinal axis Y and whose shape is preferably complementary to the periphery of the first portion 31 of the movable core 30, which is in this case an arcuate shape.
  • the radial gaps between the front edge 18 of the different teeth 17 and the periphery of the first portion 31 must remain constant.
  • the axial movement of the movable core 30 must not be disturbed by jamming or otherwise, so that the striking member 35 acts effectively.
  • the centering of the movable core 30 along its entire path along the longitudinal axis Y is therefore crucial. It is ensured by the guiding of the insulating sheath 20 which surrounds at most the second part 32 of the movable core 30.
  • the other opposite end of the insulating sheath 20 is advantageously grooved by a plurality of N protuberances 21 which extend the insulating sheath in an axial direction X. These protuberances 21 engage in the N hollow areas 15 between the teeth 17 and are held there for example by simple jamming.
  • Each hollow zone 15 has a rear wall 16 directed towards the longitudinal axis Y.
  • the dimension of the hollow zones 15 is designed so that the protuberances 21 are thus pressed against the rear walls 16, preventing any radial movement of the sheath 20.
  • This device simple makes it possible to maintain the insulating sheath perfectly centered with respect to the longitudinal axis Y and thus to avoid variations in the radial air gap and to ensure a good sliding of the mobile core 30. It is then easier to guarantee a great reproducibility and good reliability of the performance of the magnetic subassembly 1.
  • the number N of teeth 17 and hollow zones 15 is equal to three.
  • the three hollow zones 15 cooperate with three protuberances 21 of the sheath 20.
  • the teeth 17 are regularly distributed about the longitudinal axis Y and of equal width, to balance the radial forces due to the radial magnetic flux 6 passing through the radial air gaps and thus to maintain the centering of the first portion 31 of the movable core 30 inside the opening 19.
  • the preferred embodiment describes a magnetic subassembly whose insulating sheath, fixed core and mobile core all have circular radial sections.
  • Other solutions for these elements could also be envisaged, such as, for example, radial sections of substantially square shape. They would then be associated with an aperture 19 also of a suitable square shape, having a ribbed periphery of four teeth (one on each side of the square) on which the square radial crown of the movable core would abut, the four teeth being surrounded four hollow zones (in each corner of the square) cooperating with four corresponding prominences at the end of the insulating sheath.
  • a first circular calibrated element 41 comprises a washer fixed inside the opening 19. The washer is then composed of an alternation of N magnetic sector 43A and N non-magnetic sectors 43B.
  • a first calibrated element is integrated in the radial ring 33 of the movable core 30.
  • the radial ring 33 then comprises a plurality N of teeth 17 directed towards the longitudinal axis Y, distributed around the periphery of the ring. Hollow areas 15 are then located between each tooth 17.
  • Each tooth 17 then plays the role of a magnetic sector and each hollow zone 15 then plays the role of a non-magnetic sector.
  • the teeth 17 may be an integral part of the first portion 31 of the movable core 30.
  • the core may be for example made by a cold stamping.
  • the teeth 17 may be part of a washer intended to fit on the first portion 31 of the movable core 30. The washer is then composed of an alternation of N magnetic sectors 43A and N non-magnetic sectors 43B.
  • the movable core 10 is preferably immobilized in rotation on its longitudinal axis Y to avoid disruption in time of the radial transfer surface.
  • the second calibrated element 41 is preferably circular and is positioned between the movable core 30 and the cylinder head 10.
  • the second calibrated element 41 is preferably composed of a washer intended to be positioned between the radial ring 33 of the movable core 30 and the cylinder head 10.
  • the washer is then composed of an alternation of N magnetic sector 43A and N non-magnetic sectors 43B.
  • said second element is integrated in the radial face 11 of the yoke 10 at the opening 19 having a fluted periphery composed of a plurality N of teeth 17 directed towards the longitudinal axis Y, hollow zones 15 located between each tooth 17.
  • a rotation of the first calibrated element then makes it possible to obtain the variation of the magnetic flux transfer surface between the sectors of the first circular calibrated element and the mobile core.
  • a displacement, in particular a rotation, of one of the two calibrated magnetic sector elements making it possible to obtain the variation of the transfer surface of the magnetic flux between the sectors of the first calibrated element and the mobile core via the second calibrated element.
  • one of the calibrated elements is movable and is associated with an adjusting wheel 44.
  • the embodiment of this device consists of assembling this calibrated and circular portion on either side of the carcass. Blocking in a given position after rotation can be provided by aliasing or by close friction. The rotation of the device can be provided by lever or knob.
  • all magnetic sectors 43A have equal areas.
  • the magnetic sectors 43A have the same surface as the non-magnetic sectors 43B.
  • the electromagnetic trip unit 39 is associated with the thermal trip unit 28 of a magnetothermic tripping subassembly.
  • the thermal release comprises a bimetallic strip 55 of elongate rectangular overall shape and having a first free end 56 and a second end 57 assembled by any suitable fastening means on a support plate 59 of general shape. rectangular, made of an electrically conductive material.
  • bimetallic strip 55 is arranged such that its two large opposite side faces 55a, 55b.
  • the thermal trip device 28 also comprises a heater 61, here ribbon shaped, which is applied against the bimetallic strip 55 via an appropriate means of electrical insulation, in this case a thin rectangular insulating sleeve surrounding the bimetallic strip 55, approximately between the two ends 56, 57 of the latter.
  • the heater 61 has a first end intended to be electrically connected to the conductive part carrying the fixed contact and a second end connected, for example by welding, to a particular point of the bimetallic strip 55 located near the free end 56 of the latter. this.
  • an electrical overload detected by the bimetal strip 55 causes a deflection thereof which actuates a tripping bridge, which causes a control device which acts to cause the opening of the electrical contacts of the electrical switch device.
  • the electrical switch device is provided with at least one movable contact cooperating with at least one fixed contact, characterized in that it comprises an electromagnetic trigger as defined above. .
  • Said trigger is able to act on the mobile contact (s).

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

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

La présente invention se rapporte à un déclencheur électromagnétique pour appareil électrique interrupteur, comprenant un circuit magnétique constitué d'une culasse, d'un noyau fixe et d'un noyau mobile coulissant sous l'action d'une bobine. Le noyau mobile possède une couronne radiale séparant une première partie et une seconde partie de sections radiales différentes, la culasse comportant une face radiale ayant une ouverture traversée par la première partie du noyau mobile. La superposition de la couronne radiale du noyau mobile et la face radiale de la culasse forme, en une position repos, une surface de transfert de flux magnétique permettant la circulation d'un flux magnétique axial.The present invention relates to an electromagnetic release for a switchgear, comprising a magnetic circuit consisting of a yoke, a fixed core and a movable core sliding under the action of a coil. The movable core has a radial crown separating a first portion and a second portion of different radial sections, the yoke having a radial face having an opening traversed by the first portion of the movable core. The superposition of the radial crown of the movable core and the radial face of the cylinder head, in a rest position, a magnetic flux transfer surface for the circulation of an axial magnetic flux.

La présente invention se rapporte aussi à un appareil électrique interrupteur de protection doté d'au moins un contact mobile coopérant avec au moins un contact fixe.The present invention also relates to an electric switch protection device having at least one movable contact cooperating with at least one fixed contact.

ETAT DE LA TECHNIQUESTATE OF THE ART

L'utilisation de déclencheur électromagnétique dans des appareils électriques interrupteurs de protection est décrite notamment dans les documents FR2779567 , EP0501844 . Les déclencheurs électromagnétiques sont chargés d'ouvrir rapidement les contacts électriques d'un appareil interrupteur en cas de surcharge électrique, typiquement lorsque le courant s'élève au-delà d'un seuil de déclenchement magnétique prédéterminé, par exemple treize fois le courant nominal. Pour cela, ils comportent un électroaimant, parfois appelé percuteur, dont la bobine est parcourue par le courant à contrôler. Le noyau mobile du percuteur emmagasine de l'énergie au fur et à mesure que les ampères-tours augmentent dans la bobine puis, lorsque le courant dépasse le seuil de déclenchement, libère soudainement cette énergie, de façon à être capable de séparer efficacement et rapidement les contacts mobiles des contacts fixes de l'appareil.The use of electromagnetic release in electrical devices protective switches is described in particular in the documents FR2779567 , EP0501844 . The electromagnetic trip units are responsible for rapidly opening the electrical contacts of a switch device in the event of an electrical overload, typically when the current rises above a predetermined magnetic trip threshold, for example thirteen times the rated current. For this, they include an electromagnet, sometimes called striker, whose coil is traversed by the current to control. The moving core of the striker stores energy as the ampere-turns increase in the coil and, when the current exceeds the tripping threshold, suddenly releases this energy, so as to be able to separate efficiently and quickly mobile contacts of the fixed contacts of the device.

L'inconvénient des dispositifs existants est que le niveau du seuil de déclenchement magnétique est généralement difficile à ajuster et à reproduire d'un appareil à l'autre, alors que la valeur de ce seuil est évidemment importante pour que l'appareil puisse garantir la sécurité des biens et des personnes. Pour obtenir un seuil de déclenchement fiable et reproductible, il faut réduire les tolérances de fabrication pour conserver une grande précision des cotes et des zones de collage magnétique entre éléments fixes et mobiles, nécessitant une rectification éventuelle, ce qui pénalise la fabrication et le coût de tels sous-ensembles. Dans certains appareils, on est obligé de rajouter de fines cales isolantes d'entrefer. Il est également difficile dans ces dispositifs de centrer correctement le noyau mobile sur toute sa course, sans mettre en oeuvre un guidage sophistiqué pour minimiser les jeux.The disadvantage of the existing devices is that the level of the magnetic tripping threshold is generally difficult to adjust and reproduce from one device to another, while the value of this threshold is obviously important for the device to guarantee the security of property and people. To obtain a reliable and reproducible tripping threshold, it is necessary to reduce the manufacturing tolerances in order to maintain a high precision of the dimensions and magnetic bonding zones between fixed and moving elements, requiring a possible correction, which penalizes the manufacture and the cost of such subsets. In some devices, it is necessary to add thin insulating spacers. It is also difficult in these devices to properly center the mobile core over its entire stroke, without implementing sophisticated guidance to minimize gaming.

La solution décrite dans la demande de brevet de la demanderesse EP1583130B1 a pour but de trouver une solution simple et économique qui permette d'une part guider efficacement le noyau mobile du percuteur pour s'assurer de son bon coulissement durant toute sa course tout en gardant son positionnement précis par rapport aux éléments fixes, tels que la culasse du percuteur. L'invention a aussi pour but la possibilité d'ajuster facilement le seuil de déclenchement magnétique pour un calibre donné en s'affranchissant des disparités dans les cotes des différentes pièces et sans nécessiter de rajouter des éléments supplémentaires, tels que des bagues d'entrefer notamment. La solution évite également de complexifier la fabrication des pièces, en particulier la forme du noyau mobile. Tel que représenté sur les figures 1 et 2, le déclencheur électromagnétique comporte un circuit magnétique constitué d'une culasse 10, d'un noyau fixe 39 et d'un noyau mobile 30 coulissant suivant un axe longitudinal Y à l'intérieur d'une gaine isolante 20 entre une position déclenchée et une position repos sous l'action d'une bobine à induction 25 disposée autour de la gaine 20. Le noyau mobile 32 possède une couronne radiale 33 séparant une première partie et une seconde partie de section radiale différente. La culasse 10 comporte une face radiale 11 sensiblement perpendiculaire à l'axe Y avec une ouverture centrée 19 sur l'axe Y et traversée par la première partie 31 du noyau mobile 30. Tel que représenté sur la figure 1, ladite ouverture 19 comporte un pourtour cannelé composé d'une pluralité de dents 17 dirigées vers l'axe Y, des zones creuses 15 situées entre chaque dent accueillant une extrémité de la gaine isolante. Selon une caractéristique, la superposition de la couronne radiale 33 du noyau mobile 31 et les dents 17 de l'ouverture 19 de la face radiale 11 forme, en position repos, une surface de transfert de flux permettant la circulation d'un flux magnétique axial. Par ailleurs, il existe un entrefer radial fixe entre un bord avant de chaque dent et la première partie du noyau mobile, permettant la circulation d'un flux magnétique radial.The solution described in the applicant's patent application EP1583130B1 aims to find a simple and economical solution that allows on the one hand to effectively guide the movable core of the striker to ensure its smooth sliding throughout the race while keeping its precise positioning with respect to fixed elements, such as the breech of the striker. Another object of the invention is to be able to easily adjust the magnetic tripping threshold for a given size by eliminating disparities in the dimensions of the different parts and without the need to add additional elements, such as air gap rings. especially. The solution also avoids complicating the manufacture of parts, in particular the shape of the mobile core. As shown on the Figures 1 and 2 , the electromagnetic release comprises a magnetic circuit consisting of a yoke 10, a fixed core 39 and a movable core 30 sliding along a longitudinal axis Y inside an insulating sheath 20 between a triggered position and a rest position under the action of an induction coil 25 disposed around the sheath 20. The movable core 32 has a radial ring 33 separating a first portion and a second portion of different radial section. The yoke 10 has a radial face 11 substantially perpendicular to the Y axis with a centered opening 19 on the Y axis and traversed by the first portion 31 of the core. 30. As shown on the figure 1 said opening 19 comprises a fluted periphery composed of a plurality of teeth 17 directed towards the Y axis, hollow zones 15 located between each tooth receiving one end of the insulating sheath. According to one characteristic, the superposition of the radial crown 33 of the movable core 31 and the teeth 17 of the opening 19 of the radial face 11 form, in the rest position, a flow transfer surface allowing the circulation of an axial magnetic flux. . Furthermore, there is a fixed radial air gap between a front edge of each tooth and the first part of the movable core, allowing the circulation of a radial magnetic flux.

La solution de la demande de brevet de la demanderesse EP1583130B1 propose une conception permettant d'ajuster la valeur de seuil du déclenchement du noyau mobile lors de la fabrication. Cependant, des dispersions trop importantes dans la chaine de côtes ajoutées aux variations des efforts des ressorts au moment du montage des différentes pièces du déclencheur, peuvent entrainer des variations importantes de la longueur de l'entrefer par rapport à une valeur nominale calculée pour un calibre d'interrupteur de protection. Les appareils électriques présentant un défaut suite un montage sont mis au rebus ce qui peut entrainer une perte économique.The solution of the plaintiff's patent application EP1583130B1 proposes a design to adjust the trigger threshold value of the mobile core during manufacturing. However, excessive dispersions in the chain of ribs added to the variations of the forces of the springs at the time of assembly of the different parts of the release, can cause significant variations in the length of the gap from a nominal value calculated for a caliber protection switch. Electrical devices that have a defect as a result of assembly are discarded, which can lead to economic loss.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention vise donc à remédier aux inconvénients de l'état de la technique, de manière à proposer un interrupteur de protection incorporant un sous-ensemble magnétothermique de déclenchement réglable.The invention therefore aims to overcome the drawbacks of the state of the art, so as to provide a protection switch incorporating an adjustable trigger magnetothermic subset.

Le déclencheur électromagnétique selon l'invention comporte des moyens intercalaires de réglage de ladite surface de transfert de flux positionnés entre le noyau mobile et la face radiale de la culasse, lesdits moyens intercalaires de réglage comportant deux éléments calibrés accolés face contre face et étant constitués respectivement d'une alternance de secteurs magnétiques et de secteurs non magnétiques. Un déplacement d'un premier élément calibré par rapport à un second élément calibré permet d'obtenir la variation de la surface de transfert de flux magnétique.The electromagnetic release according to the invention comprises intermediate means of adjustment of said flux transfer surface positioned between the movable core and the radial face of the yoke, said intermediate adjustment means comprising two calibrated elements contiguous face-to-face and constituted respectively alternating magnetic and non-magnetic sectors. A displacement of a first calibrated element relative to a second calibrated element makes it possible to obtain the variation of the magnetic flux transfer surface.

Selon un mode de développement de l'invention, un premier élément calibré est intégré à la face radiale de la culasse au niveau de l'ouverture comportant un pourtour cannelé composé d'une pluralité de dents et de zones creuses situées entre chaque dent. Un second élément calibré est positionné entre le noyau mobile et la culasse, un déplacement dudit second élément calibré permettant d'obtenir la variation de la surface de transfert de flux magnétique entre le noyau et la culasse via les secteurs magnétiques du premier élément calibré positionnés en contact avec les secteurs magnétiques du second élément calibré.According to a development mode of the invention, a first calibrated element is integrated with the radial face of the yoke at the opening comprising a corrugated rim composed of a plurality of teeth and hollow areas located between each tooth. A second calibrated element is positioned between the movable core and the cylinder head, a displacement of said second calibrated element making it possible to obtain the variation of the magnetic flux transfer surface between the core and the cylinder head via the magnetic sectors of the first calibrated element positioned in position. contact with the magnetic sectors of the second calibrated element.

De préférence, les zones creuses situées entre chaque dent accueillent une extrémité d'une gaine isolante, ladite extrémité de la gaine comportant une pluralité de protubérances axiales maintenues par coincement dans les zones creuses de l'ouverture.Preferably, the hollow areas located between each tooth receive an end of an insulating sheath, said end of the sheath having a plurality of axial protuberances held by wedging in the hollow areas of the opening.

Selon un mode de développement de l'invention, un premier élément calibré est intégré à la couronne radiale du noyau mobile, un second élément calibré étant positionné entre le noyau mobile et la culasse, un déplacement d'un des deux éléments calibrés à secteurs magnétiques permettant d'obtenir la variation de la surface de transfert de flux magnétique entre le noyau et la culasse via les secteurs magnétiques du premier élément calibré positionnés en contact avec les secteurs magnétiques du second élément calibré.According to a development mode of the invention, a first calibrated element is integrated in the radial ring of the mobile core, a second calibrated element being positioned between the movable core and the cylinder head, a displacement of one of the two calibrated elements with magnetic sectors. to obtain the variation of the magnetic flux transfer surface between the core and the cylinder head via the magnetic sectors of the first calibrated element positioned in contact with the magnetic sectors of the second calibrated element.

De préférence, la couronne radiale comporte une pluralité de dents, des zones creuses étant situées entre chaque dent.Preferably, the radial ring has a plurality of teeth, hollow areas being located between each tooth.

De préférence, le second élément calibré est intégré à la face radiale de la culasse au niveau de l'ouverture comportant un pourtour cannelé composé d'une pluralité de dents, des zones creuses étant situées entre chaque dent.Preferably, the second calibrated element is integrated with the radial face of the yoke at the opening comprising a corrugated rim composed of a plurality of teeth, hollow zones being located between each tooth.

Avantageusement, les zones creuses situées entre chaque dent accueillent une extrémité d'une gaine isolante, ladite extrémité de la gaine comportant une pluralité de protubérances axiales maintenues par coincement dans les zones creuses de l'ouverture.Advantageously, the hollow zones located between each tooth receive an end of an insulating sheath, said end of the sheath comprising a plurality of axial protuberances held by wedging in the hollow areas of the opening.

Selon un mode particulier de réalisation, les moyens intercalaires de réglage comportent des moyens de blocages du premier élément calibré circulaire par rapport à un second élément calibré circulaire.According to a particular embodiment, the intermediate adjustment means comprise means for blocking the first circular calibrated element by compared to a second circular calibrated element.

De préférence, tous les secteurs magnétiques ont des surfaces égales, les secteurs magnétiques ayant la même surface que les secteurs non magnétiques.Preferably, all the magnetic sectors have equal areas, the magnetic sectors having the same surface as the non-magnetic sectors.

L'appareil électrique interrupteur selon l'invention comporte un déclencheur électromagnétique tel que défini ci-dessus et agissant sur le ou les contacts mobiles.The electrical switch device according to the invention comprises an electromagnetic trigger as defined above and acting on the movable contact (s).

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode particulier de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés sur lesquels :

  • la figure 1 représente une vue en perspective d'un déclencheur électromagnétique selon un mode connu ;
  • la figure 2 représente une vue éclatée en perspective d'un sous-ensemble magnétique d'un déclencheur électromagnétique selon la figure 1 ;
  • les figures 3 et 4 schématisent de façon simplifiée un exemple d'un sous-ensemble magnétique dans une vue axiale (ou longitudinale), respectivement en position repos et en position déclenchée.
  • la figure 5 représente une vue en perspective d'un déclencheur électromagnétique selon un premier mode de réalisation de l'invention ;
  • la figure 6 représente une vue éclatée en perspective d'un sous-ensemble magnétique d'un déclencheur électromagnétique selon la figure 5 ;
  • la figure 7 représente une vue en coupe d'un sous- ensemble magnétique d'un déclencheur électromagnétique selon la figure 5 ;
  • les figure 8A 8B représentent des vues de détail des moyens intercalaires de réglage de la surface de transfert de flux d'un sous- ensemble magnétique d'un déclencheur électromagnétique selon la figure 5 ;
  • la figure 9 représente une vue de détail en perspective des moyens intercalaires de réglage de la surface de transfert de flux d'un déclencheur électromagnétique selon un second mode de réalisation de l'invention.
Other advantages and features will emerge more clearly from the following description of a particular embodiment of the invention, given by way of non-limiting example, and represented in the accompanying drawings in which:
  • the figure 1 represents a perspective view of an electromagnetic trip device according to a known mode;
  • the figure 2 represents an exploded view in perspective of a magnetic subassembly of an electromagnetic trigger according to the figure 1 ;
  • the Figures 3 and 4 schematically illustrate an example of a magnetic subassembly in an axial (or longitudinal) view, respectively in the rest position and in the triggered position.
  • the figure 5 is a perspective view of an electromagnetic trip device according to a first embodiment of the invention;
  • the figure 6 represents an exploded view in perspective of a magnetic subassembly of an electromagnetic trigger according to the figure 5 ;
  • the figure 7 represents a sectional view of a magnetic subassembly of an electromagnetic trigger according to the figure 5 ;
  • the FIG 8A 8B are detailed views of the intermediate means for adjusting the flux transfer surface of a magnetic subassembly of an electromagnetic trigger according to the figure 5 ;
  • the figure 9 represents a detailed perspective view of the intermediate means for adjusting the flux transfer surface of an electromagnetic release according to a second embodiment of the invention.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

En référence aux figures 5 et 6, un déclencheur électromagnétique est destiné à contrôler un courant de puissance circulant dans un appareil interrupteur et à déclencher brutalement lorsque ce courant dépasse un certain seuil, appelé seuil de déclenchement.With reference to figures 5 and 6 , an electromagnetic release is intended to control a power current flowing in a switch device and to trigger suddenly when this current exceeds a certain threshold, called trigger threshold.

Tel que représenté sur la figure 6, le déclencheur électromagnétique 39 à percuteur comprend un circuit magnétique composé d'une culasse magnétique 10, d'un noyau fixe 39 et d'un noyau mobile 30 qui sont réalisés en matériau ferromagnétique. Le noyau fixe 39 et le noyau mobile 30 sont alignés selon un axe longitudinal Y.As shown on the figure 6 the striker electromagnetic trigger 39 comprises a magnetic circuit consisting of a magnetic yoke 10, a fixed core 39 and a movable core 30 which are made of ferromagnetic material. The fixed core 39 and the movable core 30 are aligned along a longitudinal axis Y.

Selon un mode de réalisation les deux noyaux sont de préférence entourés par une gaine cylindrique isolante 20. Le noyau mobile 30 coulisse de préférence à l'intérieur de cette gaine isolante 20 selon l'axe longitudinal Y entre une position repos, schématisée en figure 3, et une position déclenchée, schématisée en figure 4. Le noyau mobile 30 se déplace sous l'action d'une bobine 25 à induction disposée autour de la gaine isolante 20. Lorsque l'intensité du courant à contrôler circulant dans la bobine 25 dépasse le seuil de déclenchement, le noyau mobile se déplace alors rapidement de la position repos vers la position déclenchée. En cas de disparition du courant dans la bobine 25, un organe de rappel, tel qu'un ressort de rappel 29, ramène le noyau mobile 30 dans sa position repos. Le noyau mobile est composé d'une première partie 31 et d'une seconde partie 32 juxtaposée en direction du noyau fixe 39.According to one embodiment, the two cores are preferably surrounded by an insulating cylindrical sheath 20. The movable core 30 slides preferably inside this insulating sheath 20 along the longitudinal axis Y between a rest position, schematized in FIG. figure 3 , and a triggered position, schematized in figure 4 . The movable core 30 moves under the action of an induction coil disposed around the insulating sheath 20. When the intensity of the current to be controlled flowing in the coil 25 exceeds the trigger threshold, the moving core then moves quickly from the rest position to the triggered position. In case of disappearance of the current in the coil 25, a return member, such as a return spring 29, brings the movable core 30 to its rest position. The mobile core is composed of a first portion 31 and a second portion 32 juxtaposed towards the fixed core 39.

Dans le mode réalisation préféré, les première et seconde parties 31, 32 sont cylindriques. Les première et seconde parties cylindriques 31, 32 possèdent une section radiale différente, en l'occurrence le diamètre de la partie 31 est inférieur à celui de la partie 32. Le diamètre de la seconde partie 32 est sensiblement égal à celui du noyau fixe 39. Les parties 31 et 32 sont donc séparées par un rebord de la partie 32 qui forme ainsi une couronne radiale 33.In the preferred embodiment, the first and second portions 31, 32 are cylindrical. The first and second cylindrical portions 31, 32 have a different radial section, in this case the diameter of the portion 31 is smaller than that of the portion 32. The diameter of the second portion 32 is substantially equal to that of the fixed core 39 Parts 31 and 32 are therefore separated by a flange of the part 32 which thus forms a radial crown 33.

Ainsi, le noyau mobile 30 possédant une couronne radiale 33 séparant une première partie 31 et une seconde partie 32 de section radiale différente. La culasse 10 comportant une face radiale 11 sensiblement perpendiculaire à l'axe Y avec une ouverture 19 centrée sur l'axe Y et traversée par la première partie 31 du noyau mobile 30. La superposition, au niveau de l'ouverture 19, de la couronne radiale 33 du noyau mobile 30 et la face radiale 11 de la culasse 10 forme, en position repos, une surface de transfert de flux magnétique permettant la circulation d'un flux magnétique axial 5Thus, the movable core 30 having a radial ring 33 separating a first portion 31 and a second portion 32 of different radial section. The yoke 10 having a radial face 11 substantially perpendicular to the Y axis with an opening 19 centered on the Y axis and traversed by the first portion 31 of the movable core 30. The superposition, at the opening 19, the radial crown 33 of the movable core 30 and the radial face 11 of the yoke 10 forms, in the rest position, a magnetic flux transfer surface allowing the circulation of an axial magnetic flux 5

De préférence, le diamètre de la seconde partie 32 est ajusté pour pouvoir juste coulisser à l'intérieur de la gaine cylindrique 20 sans créer de jeu.Preferably, the diameter of the second portion 32 is adjusted to just slide inside the cylindrical sheath 20 without creating play.

De façon connue dans ce type de sous-ensemble, le noyau mobile 30 comprend également un organe percuteur 35, par exemple placé dans le prolongement de la première partie 31, qui est chargé de transmettre le mouvement du noyau mobile vers le (ou les) contact(s) mobile(s) de l'appareil interrupteur, afin de le(s) séparer du (ou des) contact(s) fixe(s) correspondant(s), lorsque le noyau mobile 30 passe en position déclenchée.In a manner known in this type of subassembly, the movable core 30 also comprises a striker member 35, for example placed in the extension of the first part 31, which is responsible for transmitting the movement of the movable core to the (or the) mobile contact (s) of the switch device, in order to (s) separate (or) fixed contact (s) corresponding (s), when the movable core 30 goes into the triggered position.

La culasse magnétique 10 telle que représentée en figure 5, forme un cadre sensiblement rectangulaire entourant la bobine 25 et la gaine 20, composé de deux plans longitudinaux 13, 14 sensiblement parallèles à l'axe Y, entourés de deux faces radiales 11, 12 sensiblement perpendiculaires à l'axe Y. Le noyau fixe 39 est fixé à l'une des faces radiales 12. L'autre face radiale 11 possède une ouverture 19 radiale centrée sur l'axe Y et traversée par la première partie 31 du noyau mobile 10. Le diamètre de la seconde partie 32 du noyau mobile est par contre suffisamment important pour l'empêcher de traverser l'ouverture 19.The magnetic yoke 10 as shown in figure 5 , forms a substantially rectangular frame surrounding the coil 25 and the sheath 20, composed of two longitudinal planes 13, 14 substantially parallel to the Y axis, surrounded by two radial faces 11, 12 substantially perpendicular to the Y axis. The fixed core 39 is attached to one of the radial faces 12. The other radial face 11 has a radial opening 19 centered on the Y axis and traversed by the first portion 31 of the movable core 10. The diameter of the second portion 32 of the core mobile is sufficiently important to prevent it from crossing the opening 19.

Le fonctionnement d'un sous-ensemble magnétique de type percuteur magnétique est le suivant. En l'absence de courant dans la bobine 25, le noyau mobile 30 est maintenu par le petit ressort de rappel 29 en position repos (voir figure 3), ce qui l'éloigne du noyau fixe 39. Dans cette position, la couronne radiale 33 est plaquée contre la face radiale 11 de la culasse 10, créant ainsi la surface de transfert de flux magnétique. Lorsqu'un courant commence à circuler dans la bobine 25, il se crée un champ magnétique passant du noyau fixe 39 vers la culasse 12, 13, 14, 11 puis passant préférentiellement de la face radiale 11 directement vers la couronne radiale 33 dans le sens axial, comme représenté par les flèches 5 de la figure 3. En effet, en position repos, l'entrefer axial existant entre la face radiale 11 et la couronne radiale 33 est inférieur à l'entrefer radial fixe entre la face radiale 11 et la circonférence de la première partie 31 du noyau mobile 30. Le noyau mobile 30 subit donc une force d'attraction vers le noyau fixe 39 mais également une force de retenue opposée dirigée vers la face radiale 11 de la culasse magnétique. Tant que le courant à contrôler reste faible, la force de retenue est prépondérante et le noyau mobile 30 reste sensiblement immobile, l'entrefer axial étant toujours inférieur à l'entrefer radial.The operation of a magnetic magnetic striker type subassembly is as follows. In the absence of current in the coil 25, the movable core 30 is held by the small return spring 29 in the rest position (see figure 3 ), which removes it from the fixed core 39. In this position, the radial ring 33 is pressed against the radial face 11 of the yoke 10, thus creating the magnetic flux transfer surface. When a current begins to flow in the coil 25, a magnetic field is created passing from the fixed core 39 to the yoke 12, 13, 14, 11 and preferably passing from the radial face 11 directly to the radial ring 33 in the axial direction, as represented by the arrows 5 of the figure 3 . Indeed, in the rest position, the axial gap existing between the radial face 11 and the radial ring 33 is smaller than the fixed radial gap between the radial face 11 and the circumference of the first portion 31 of the movable core 30. The core Mobile 30 thus undergoes a force of attraction towards the fixed core 39 but also an opposite retaining force directed towards the radial face 11 of the magnetic yoke. As long as the current to be controlled remains low, the retaining force is preponderant and the movable core 30 remains substantially immobile, the axial air gap being always less than the radial gap.

Au fur et à mesure que les ampères-tours créés par la bobine 25 vont augmenter, la surface de transfert de flux magnétique va devenir saturée et la force d'attraction va alors augmenter plus vite que la force de retenue. Un entrefer axial croissant va apparaître à cet endroit, au moment où le noyau mobile 30 amorce son mouvement en direction du noyau fixe 39 (ce qui correspond à un courant instantané dans la bobine supérieur au seuil de déclenchement défini). Le champ magnétique va alors préférentiellement circuler de la face radiale 11 vers la première partie 31 du noyau mobile 30 dans le sens radial, comme représenté par les flèches 6 de la figure 4. La force de retenue va alors brutalement tendre vers zéro et le noyau mobile va être entraîné très rapidement par la force d'attraction pour percuter le noyau fixe 39, pratiquement sans résistance autre que celle du ressort de rappel 39 de très faible valeur d'effort résistant.As the ampere turns created by coil 25 will increase, the magnetic flux transfer surface will become saturated and the attractive force will then increase faster than the retaining force. An increasing axial air gap will appear at this point, at the moment when the movable core 30 initiates its movement in the direction of the fixed core 39 (which corresponds to an instantaneous current in the coil greater than the defined tripping threshold). The magnetic field will then preferentially flow from the radial face 11 to the first portion 31 of the movable core 30 in the radial direction, as represented by the arrows 6 of the figure 4 . The holding force will then suddenly tend to zero and the mobile core will be driven very quickly by the force of attraction to hit the fixed core 39, virtually without resistance other than that of the return spring 39 of very low effort value resistant.

Selon un mode de réalisation de l'invention, le déclencheur électromagnétique 39 comporte des moyens autorisant un réglage du seuil de déclenchement magnétique via le réglage de la surface de transfert de flux magnétique permettant la circulation d'un flux magnétique axial 5. Le déclencheur électromagnétique comporte des moyens intercalaires de réglage 40 de ladite surface de transfert de flux magnétique positionnés respectivement entre le noyau mobile 30 et l'ouverture 19. La superposition de la couronne radiale 33 du noyau mobile 30, des moyens intercalaires de réglage 40 et de la face radiale 11 de la culasse 10 forme, en position repos, la surface radiale de transfert de flux.According to one embodiment of the invention, the electromagnetic trip unit 39 comprises means allowing a setting of the magnetic trip threshold via the adjustment of the magnetic flux transfer surface allowing the circulation of an axial magnetic flux 5. The electromagnetic trip unit comprises intermediate adjustment means 40 of said magnetic flux transfer surface positioned respectively between the movable core 30 and the opening 19. The superposition of the radial ring 33 of the movable core 30, intermediate adjustment means 40 and the face radial 11 of the cylinder head 10 forms, in the rest position, the radial flow transfer surface.

Lesdits moyens intercalaires de réglage 40 comportant deux éléments calibrés 41 accolés face contre face.Said intermediate adjustment means 40 comprising two calibrated elements 41 contiguous face-to-face.

A titre d'exemple de réalisation, les deux éléments calibrés 41 sont circulaires et comporte un axe de révolution confondu avec l'axe longitudinal Y.By way of exemplary embodiment, the two calibrated elements 41 are circular and comprise an axis of revolution coincident with the longitudinal axis Y.

Chaque élément calibré 41 est respectivement constitué d'une alternance de secteurs magnétiques 43A et de secteurs non magnétiques 43B. Un déplacement d'un premier élément calibré par rapport à un second élément calibré permet de faire varier la surface radiale de transfert de flux magnétique entre la culasse 10 et le noyau mobile 30. Autrement dit, la mise en déplacement d'un élément calibré par rapport à un autre élément calibré permet d'ajuster la réluctance du circuit magnétique et par ce biais la force de retenu du noyau mobile 30. Cela permet in fine de fixer le seuillage magnétique recherché.Each calibrated element 41 consists respectively of alternating magnetic sectors 43A and non-magnetic sectors 43B. A displacement of a first calibrated element relative to a second calibrated element makes it possible to vary the radial magnetic flux transfer surface between the cylinder head 10 and the mobile core 30. In other words, the displacement of a calibrated element by relative to another calibrated element makes it possible to adjust the reluctance of the magnetic circuit and thereby the retaining force of the movable core 30. This allows in fine to set the desired magnetic thresholding.

Selon un premier mode de réalisation de l'invention, un premier élément calibré 41 est intégré à la face radiale 11 de la culasse 10 au niveau de l'ouverture 19.According to a first embodiment of the invention, a first calibrated element 41 is integrated with the radial face 11 of the yoke 10 at the opening 19.

Selon un mode de développement tel que représenté sur la figure 6, l'ouverture radiale 19 comporte un pourtour intérieur cannelé constitué d'une pluralité N de dents 17 dirigées vers l'axe longitudinal Y, réparties sur ce pourtour. Des zones creuses 15 sont alors situées entre chaque dent 17. Chaque dent 17 joue alors le rôle d'un secteur magnétique 43A et chaque zone creuse 15 joue alors le rôle d'un secteur non-magnétique 43B.According to a mode of development as represented on the figure 6 , the radial opening 19 comprises a grooved inner periphery consisting of a plurality N of teeth 17 directed towards the longitudinal axis Y, distributed around this periphery. Hollow areas 15 are then located between each tooth 17. Each tooth 17 then plays the role of a magnetic sector 43A and each hollow zone 15 then plays the role of a non-magnetic sector 43B.

Le second élément calibré 41 est alors positionné entre le noyau mobile 30 et la culasse 10. Comme représenté sur la figure 8A, le second élément calibré 41 est de préférence circulaire et est composé de préférence d'une rondelle destinée à se positionner sur la couronne radiale 33 du noyau mobile 30. La rondelle est alors composée d'une alternance de N secteur magnétique 43A et de N secteurs non magnétique 43B. Une rotation dudit second élément calibré à secteurs magnétiques permet d'obtenir la variation de la surface de transfert de flux magnétique entre le noyau 30 et la culasse 10 via les secteurs magnétiques 43A du premier élément calibré positionnés en contact avec les secteurs magnétiques 43A du second élément calibré.The second calibrated element 41 is then positioned between the movable core 30 and the cylinder head 10. As shown in FIG. figure 8A , the second calibrated element 41 is preferably circular and is preferably composed of a washer intended to be positioned on the radial ring 33 of the movable core 30. The washer is then composed of an alternation of N magnetic sector 43A and N non-magnetic sectors 43B. Rotation of said second calibrated magnetic sector element makes it possible to obtain the variation of the magnetic flux transfer surface between the core 30 and the cylinder head 10 via the magnetic sectors 43A of the first calibrated element positioned in contact with the magnetic sectors 43A of the second calibrated element.

Selon ce mode de développement, les zones creuses 15 situées entre chaque dent 17 accueillent une extrémité de la gaine isolante 20, ladite extrémité de la gaine 20 comportant une pluralité N de protubérances axiales maintenues par coincement dans les zones creuses 15 de l'ouverture 19.According to this mode of development, the hollow zones 15 located between each tooth 17 receive one end of the insulating sheath 20, said end of the sheath 20 having a plurality N of axial protuberances held by wedging in the hollow zones 15 of the opening 19 .

Les dimensions des dents 17 sont étudiées pour que la première partie 31 du noyau mobile 30 puisse traverser librement l'ouverture 19 dans l'espace intérieur situé entre les dents 17, mais pour que les dents 17 puissent par contre retenir la seconde partie 32. Lorsque le noyau mobile 30 est en position repos, la couronne radiale 33 est donc plaquée contre les dents 17, créant ainsi un très faible entrefer axial.The dimensions of the teeth 17 are designed so that the first portion 31 of the movable core 30 can pass freely through the opening 19 in the interior space between the teeth 17, but so that the teeth 17 can retain the second part 32. When the movable core 30 is in the rest position, the radial ring 33 is pressed against the teeth 17, thus creating a very small axial gap.

La surface de transfert de flux est discontinue à cause du pourtour cannelé de l'ouverture 19, ce qui évite d'avoir une force de retenue trop importante appliquée au noyau mobile 30 par le flux magnétique axial 5. Cette discontinuité va de plus permettre d'ajuster très simplement la force de retenue. En particulier, en jouant uniquement sur la largeur des dents 17, il est alors possible de modifier la surface de transfert de flux et donc régler aisément le seuil de déclenchement du sous-ensemble 1, sans modifier d'autres dimensions ou caractéristiques, en particulier sans nécessiter de modifier et de complexifier la forme du noyau mobile avec des alésages ou des gorges sur la couronne radiale 33, ce qui entraînerait des coûts supplémentaires dans la fabrication d'une telle pièce. D'autre part, cela évite d'avoir à ajouter des cales ou des bagues supplémentaires de grande précision pour augmenter l'entrefer axial entre la couronne radiale 33 et les dents 17.The flow transfer surface is discontinuous because of the corrugated periphery of the opening 19, which avoids having too great a retaining force applied to the movable core 30 by the axial magnetic flux 5. This discontinuity will also allow more very simply adjust the restraining force. In particular, by playing only on the width of the teeth 17, it is then possible to modify the flow transfer surface and thus easily adjust the tripping threshold of the subset 1, without modifying other dimensions or characteristics, in particular without requiring to modify and complicate the shape of the movable core with bores or grooves on the radial ring 33, which would entail additional costs in the manufacture of such a part. On the other hand, this avoids the need to add extra high precision shims or rings to increase the axial air gap between the radial ring 33 and the teeth 17.

Les dents 17 présentent chacune un bord avant 18 dirigé vers l'axe longitudinal Y et dont la forme est de préférence complémentaire au pourtour de la première partie 31 du noyau mobile 30, qui est en l'occurrence une forme en arc de cercle. Pour un bon fonctionnement du sous-ensemble 1, les entrefers radiaux existant entre le bord avant 18 des différentes dents 17 et le pourtour de la première partie 31 doivent rester constants. De plus, le mouvement axial du noyau mobile 30 ne doit pas être perturbé par coincement ou autre, pour que l'organe percuteur 35 agisse efficacement. Le centrage du noyau mobile 30 sur toute sa course le long de l'axe longitudinal Y est donc crucial. Il est assuré grâce au guidage de la gaine isolante 20 qui entoure au plus juste la seconde partie 32 du noyau mobile 30. Cependant, ce centrage est difficile puisqu'il nécessite de solidariser fermement les deux extrémités de la gaine isolante 20 par rapport à la culasse magnétique 10. Une première extrémité de la gaine isolante 20 est aisément fixée à la face radiale 12. Selon l'invention, l'autre extrémité opposée de la gaine isolante 20 est avantageusement cannelée grâce à une pluralité de N protubérances 21 qui prolongent la gaine isolante dans une direction axiale X. Ces protubérances 21 viennent s'engager dans les N zones creuses 15 situées entre les dents 17 et y sont maintenues par exemple par simple coincement. Chaque zone creuse 15 comporte une paroi arrière 16 dirigée vers l'axe longitudinal Y. La dimension des zones creuses 15 est étudiée pour que les protubérances 21 soient ainsi plaquées contre les parois arrière 16, empêchant tout mouvement radial de la gaine 20. Ce dispositif simple permet de maintenir la gaine isolante parfaitement centrée par rapport à l'axe longitudinal Y et donc d'éviter les variations de l'entrefer radial et d'assurer un bon coulissement du noyau mobile 30. Il est alors plus facile de garantir une grande reproductibilité et une bonne fiabilité des performances du sous-ensemble magnétique 1.The teeth 17 each have a leading edge 18 directed towards the longitudinal axis Y and whose shape is preferably complementary to the periphery of the first portion 31 of the movable core 30, which is in this case an arcuate shape. For proper operation of the subassembly 1, the radial gaps between the front edge 18 of the different teeth 17 and the periphery of the first portion 31 must remain constant. In addition, the axial movement of the movable core 30 must not be disturbed by jamming or otherwise, so that the striking member 35 acts effectively. The centering of the movable core 30 along its entire path along the longitudinal axis Y is therefore crucial. It is ensured by the guiding of the insulating sheath 20 which surrounds at most the second part 32 of the movable core 30. However, this centering is difficult since it requires firmly securing the two ends of the insulating sheath 20 relative to the magnetic yoke 10. A first end of the insulating sheath 20 is easily attached to the radial face 12. According to the invention , the other opposite end of the insulating sheath 20 is advantageously grooved by a plurality of N protuberances 21 which extend the insulating sheath in an axial direction X. These protuberances 21 engage in the N hollow areas 15 between the teeth 17 and are held there for example by simple jamming. Each hollow zone 15 has a rear wall 16 directed towards the longitudinal axis Y. The dimension of the hollow zones 15 is designed so that the protuberances 21 are thus pressed against the rear walls 16, preventing any radial movement of the sheath 20. This device simple makes it possible to maintain the insulating sheath perfectly centered with respect to the longitudinal axis Y and thus to avoid variations in the radial air gap and to ensure a good sliding of the mobile core 30. It is then easier to guarantee a great reproducibility and good reliability of the performance of the magnetic subassembly 1.

Selon le mode de réalisation présenté sur la figure 6, le nombre N de dents 17 et de zones creuses 15 est égal à trois. Les trois zones creuses 15 coopèrent avec trois protubérances 21 de la gaine 20. Les dents 17 sont régulièrement réparties autour de l'axe longitudinal Y et de largeur égale, pour équilibrer les forces radiales dues au flux magnétique radial 6 passant par les entrefers radiaux et donc pour maintenir le centrage de la première partie 31 du noyau mobile 30 à l'intérieur de l'ouverture 19. On pourrait aussi envisager un nombre N différent de trois, comme par exemple une ouverture 19 comprenant deux dents 17 symétriquement opposées par rapport à l'axe longitudinal Y et deux protubérances 21 également symétriques à l'extrémité de la gaine 20, ainsi que le suggèrent les figures 3 et 4. Dans une autre variante, on pourrait aussi avoir plusieurs dents de différentes largeurs associées à un positionnement non régulièrement réparti autour de l'axe longitudinal Y, de façon à assurer néanmoins un bon équilibrage des forces radiales magnétiques sur le noyau mobile.According to the embodiment presented on the figure 6 the number N of teeth 17 and hollow zones 15 is equal to three. The three hollow zones 15 cooperate with three protuberances 21 of the sheath 20. The teeth 17 are regularly distributed about the longitudinal axis Y and of equal width, to balance the radial forces due to the radial magnetic flux 6 passing through the radial air gaps and thus to maintain the centering of the first portion 31 of the movable core 30 inside the opening 19. One could also consider a number N different from three, such as for example an opening 19 comprising two teeth 17 symmetrically opposite to the longitudinal axis Y and two protuberances 21 also symmetrical at the end of the sheath 20, as suggested by the Figures 3 and 4 . In another variant, one could also have several teeth of different widths associated with a positioning not regularly distributed around the longitudinal axis Y, so as to ensure nevertheless a good balance of magnetic radial forces on the mobile core.

Par ailleurs, le mode de réalisation préféré décrit un sous-ensemble magnétique dont la gaine isolante, le noyau fixe et le noyau mobile possèdent tous des sections radiales circulaires. On pourrait également envisager d'autres solutions pour ces éléments, comme par exemple des sections radiales de forme sensiblement carrée. Ils seraient alors associés avec une ouverture 19 également d'une forme carrée adaptée, présentant un pourtour cannelé de quatre dents (une sur chaque côté du carré) sur lesquelles viendrait s'appuyer la couronne radiale carrée du noyau mobile, les quatre dents étant entourées de quatre zones creuses (dans chaque coin du carré) coopérant avec quatre proéminences correspondantes à l'extrémité de la gaine isolante.Moreover, the preferred embodiment describes a magnetic subassembly whose insulating sheath, fixed core and mobile core all have circular radial sections. Other solutions for these elements could also be envisaged, such as, for example, radial sections of substantially square shape. They would then be associated with an aperture 19 also of a suitable square shape, having a ribbed periphery of four teeth (one on each side of the square) on which the square radial crown of the movable core would abut, the four teeth being surrounded four hollow zones (in each corner of the square) cooperating with four corresponding prominences at the end of the insulating sheath.

Selon une variante de développement non représentée, un premier élément calibré circulaire 41 comporte une rondelle fixée à l'intérieur de l'ouverture 19. La rondelle est alors composée d'une alternance de N secteur magnétique 43A et de N secteurs non magnétique 43B.According to a development variant not shown, a first circular calibrated element 41 comprises a washer fixed inside the opening 19. The washer is then composed of an alternation of N magnetic sector 43A and N non-magnetic sectors 43B.

Selon un autre mode de réalisation de l'invention tel que représenté sur la figure 9, un premier élément calibré est intégré à la couronne radiale 33 du noyau mobile 30. La couronne radiale 33 comporte alors une pluralité N de dents 17 dirigées vers l'axe longitudinal Y, réparties sur le pourtour de la couronne. Des zones creuses 15 sont alors situées entre chaque dent 17. Chaque dent 17 joue alors le rôle d'un secteur magnétique et chaque zone creuse 15 joue alors le rôle d'un secteur non-magnétique. A titre d'exemple de réalisation du premier élément calibré, les dents 17 peuvent faire partie intégrante de la première partie 31 du noyau mobile 30. Le noyau peut être par exemple réalisé par un emboutissage à froid. Selon une variante de réalisation non représentée, les dents 17 peuvent faire partie d'une rondelle destinée à venir s'emboiter sur la première partie 31 du noyau mobile 30. La rondelle est alors composée d'une alternance de N secteurs magnétiques 43A et de N secteurs non-magnétiques 43B.According to another embodiment of the invention as represented on the figure 9 , a first calibrated element is integrated in the radial ring 33 of the movable core 30. The radial ring 33 then comprises a plurality N of teeth 17 directed towards the longitudinal axis Y, distributed around the periphery of the ring. Hollow areas 15 are then located between each tooth 17. Each tooth 17 then plays the role of a magnetic sector and each hollow zone 15 then plays the role of a non-magnetic sector. As an exemplary embodiment of the first calibrated element, the teeth 17 may be an integral part of the first portion 31 of the movable core 30. The core may be for example made by a cold stamping. According to an alternative embodiment not shown, the teeth 17 may be part of a washer intended to fit on the first portion 31 of the movable core 30. The washer is then composed of an alternation of N magnetic sectors 43A and N non-magnetic sectors 43B.

Le noyau mobile 10 est de préférence immobilisé en rotation sur son axe longitudinal Y pour éviter un dérèglement dans le temps de la surface radiale de transfert.The movable core 10 is preferably immobilized in rotation on its longitudinal axis Y to avoid disruption in time of the radial transfer surface.

Le second élément calibré 41 est de préférence circulaire et est positionné entre le noyau mobile 30 et la culasse 10. A titre d'exemple de réalisation représenté sur la figure 9, le second élément calibré 41 est composé de préférence d'une rondelle destinée à se positionner entre la couronne radiale 33 du noyau mobile 30 et la culasse 10. La rondelle est alors composée d'une alternance de N secteur magnétique 43A et de N secteurs non magnétique 43B.The second calibrated element 41 is preferably circular and is positioned between the movable core 30 and the cylinder head 10. As an exemplary embodiment shown in FIG. figure 9 the second calibrated element 41 is preferably composed of a washer intended to be positioned between the radial ring 33 of the movable core 30 and the cylinder head 10. The washer is then composed of an alternation of N magnetic sector 43A and N non-magnetic sectors 43B.

Selon une variante de réalisation non représentée du second élément calibré, ledit second élément est intégré à la face radiale 11 de la culasse 10 au niveau de l'ouverture 19 comportant un pourtour cannelé composé d'une pluralité N de dents 17 dirigées vers l'axe longitudinal Y, des zones creuses 15 situées entre chaque dent 17. Une rotation du premier élément calibré permet alors d'obtenir la variation de la surface de transfert de flux magnétique entre les secteurs du premier élément calibré circulaire et le noyau mobile.According to a not shown embodiment of the second calibrated element, said second element is integrated in the radial face 11 of the yoke 10 at the opening 19 having a fluted periphery composed of a plurality N of teeth 17 directed towards the longitudinal axis Y, hollow zones 15 located between each tooth 17. A rotation of the first calibrated element then makes it possible to obtain the variation of the magnetic flux transfer surface between the sectors of the first circular calibrated element and the mobile core.

Un déplacement, notamment une rotation, d'un des deux éléments calibrés à secteurs magnétiques permettant d'obtenir la variation de la surface de transfert du flux magnétique entre les secteurs du premier élément calibré et le noyau mobile via le second élément calibré.A displacement, in particular a rotation, of one of the two calibrated magnetic sector elements making it possible to obtain the variation of the transfer surface of the magnetic flux between the sectors of the first calibrated element and the mobile core via the second calibrated element.

Selon les modes de développement de l'invention, à titre d'exemple de réalisation, un des éléments calibré est mobile et est associé à une molette de réglage 44. La réalisation de ce dispositif consiste en l'assemblage de cette partie calibrée et circulaire de part et d'autre de la carcasse. Le blocage dans une position donnée après rotation peut être assuré par crénelage ou par frottement serré. La mise en rotation du dispositif peut être assurée par levier ou molette.According to the embodiments of the invention, by way of exemplary embodiment, one of the calibrated elements is movable and is associated with an adjusting wheel 44. The embodiment of this device consists of assembling this calibrated and circular portion on either side of the carcass. Blocking in a given position after rotation can be provided by aliasing or by close friction. The rotation of the device can be provided by lever or knob.

Selon un mode de développement de l'invention, tous les secteurs magnétiques 43A ont des surfaces égales.According to one embodiment of the invention, all magnetic sectors 43A have equal areas.

Selon un mode de développement de l'invention, les secteurs magnétiques 43A ont la même surface que les secteurs non magnétiques 43B.According to one embodiment of the invention, the magnetic sectors 43A have the same surface as the non-magnetic sectors 43B.

Tel que représenté sur la figure 5, à titre d'exemple de réalisation, le déclencheur électromagnétique 39 est associé le déclencheur thermique 28 d'un sous-ensemble de déclenchement magnétothermique. Le déclencheur thermique comporte un bilame 55 mince de forme générale rectangulaire allongée et ayant une première extrémité libre 56 et une seconde extrémité 57 assemblée par tout moyen de fixation approprié sur une plaquette de support 59 de forme générale rectangulaire, réalisée en un matériau électriquement conducteur. Comme le montre la figure 5, le bilame 55 est agencé de telle sorte que ses deux grandes faces latérales opposées 55a, 55b. Le déclencheur thermique 28 comporte également une chaufferette 61, ici en forme de ruban, qui est appliquée contre le bilame 55 via un moyen approprié d'isolation électrique, en l'occurrence un mince manchon isolant rectangulaire entourant le bilame 55, approximativement entre les deux extrémités 56, 57 de ce dernier. La chaufferette 61 possède une première extrémité destinée à être reliée électriquement à la pièce conductrice portant le contact fixe et une seconde extrémité reliée, par exemple par soudage, en un point particulier du bilame 55 situé à proximité de l'extrémité libre 56 de celui-ci. A titre d'exemple de fonctionnement de l'appareil électrique interrupteur de protection, à partir de la position de fermeture des contacts, une surcharge électrique détectée par le bilame 55 provoque une déflexion de celui-ci qui actionne un pont de déclenchement, lequel entraîne un dispositif de commande qui agit provoquer l'ouverture des contacts électriques de l'appareil électrique interrupteur.As shown on the figure 5 , as an exemplary embodiment, the electromagnetic trip unit 39 is associated with the thermal trip unit 28 of a magnetothermic tripping subassembly. The thermal release comprises a bimetallic strip 55 of elongate rectangular overall shape and having a first free end 56 and a second end 57 assembled by any suitable fastening means on a support plate 59 of general shape. rectangular, made of an electrically conductive material. As shown in figure 5 bimetallic strip 55 is arranged such that its two large opposite side faces 55a, 55b. The thermal trip device 28 also comprises a heater 61, here ribbon shaped, which is applied against the bimetallic strip 55 via an appropriate means of electrical insulation, in this case a thin rectangular insulating sleeve surrounding the bimetallic strip 55, approximately between the two ends 56, 57 of the latter. The heater 61 has a first end intended to be electrically connected to the conductive part carrying the fixed contact and a second end connected, for example by welding, to a particular point of the bimetallic strip 55 located near the free end 56 of the latter. this. As an example of operation of the electrical switch protection device, from the closed position of the contacts, an electrical overload detected by the bimetal strip 55 causes a deflection thereof which actuates a tripping bridge, which causes a control device which acts to cause the opening of the electrical contacts of the electrical switch device.

Selon un mode de réalisation non représenté, l'appareil électrique interrupteur selon l'invention est doté d'au moins un contact mobile coopérant avec au moins un contact fixe, caractérisé en ce qu'il comporte un déclencheur électromagnétique tel que défini ci-dessus. Ledit déclencheur est apte à agir sur le ou les contacts mobiles.According to an embodiment not shown, the electrical switch device according to the invention is provided with at least one movable contact cooperating with at least one fixed contact, characterized in that it comprises an electromagnetic trigger as defined above. . Said trigger is able to act on the mobile contact (s).

Claims (10)

  1. An electromagnetic trip device (39) for an electric switch apparatus, comprising a magnetic circuit formed by a shell (10), a fixed core (39) and a moving core (30) sliding due to the action of a coil (25), the moving core (30) having a radial crown (33) separating a first part (31) and a second part (32) of different radial cross-sections, the shell (10) comprising a radial surface (11) having an opening (19) through which the first part (31) of the moving core (30) passes, superposition of the radial crown (33) of the moving core (30) and the radial surface (11) of the shell (10) forming, in a rest position, a magnetic flux transfer surface enabling flow of an axial magnetic flux (5), characterized in that it comprises intercalary adjustment means (40) of said flux transfer surface positioned between the moving core (30) and the radial surface (11) of the shell (10), said intercalary adjustment means (40) comprising two calibrated elements (41) adjoined surface against surface and being respectively formed by an alternation of magnetic sectors (43A) and non-magnetic sectors (43B), movement of a first calibrated element with respect to a second calibrated element enabling variation of the magnetic flux transfer surface to be obtained.
  2. The electromagnetic trip device according to claim 1, characterized in that a first calibrated element (41) is integrated in the radial surface (11) of the shell (10) at the level of the opening (19) comprising a serrated periphery composed of a plurality (N) of teeth (17) and of recessed areas (15) situated between each tooth (17), a second calibrated element (41) being positioned between the moving core (30) and the shell (10), movement of said second calibrated element enabling a variation of the magnetic flux transfer surface between the core (30) and the shell (10) to be obtained via the magnetic sectors (43A) of the first calibrated element positioned in contact with the magnetic sectors (43A) of the second calibrated element.
  3. The electromagnetic trip device according to claim 2, characterized in that the recessed areas (15) situated between each tooth (17) accommodate one end of an insulating sheath (20), said end of the sheath (20) comprising a plurality (N) of axial protuberances secured by jamming in the recessed areas (15) of the opening (19).
  4. The electromagnetic trip device according to claim 1, characterized in that a first calibrated element (41) is integrated in the radial crown (33) of the moving core (30), a second calibrated element (41) being positioned between the moving core (30) and the shell (10), movement of one of the two calibrated elements with magnetic sectors enabling a variation of the magnetic flux transfer surface between the core (30) and the shell (10) to be obtained via the magnetic sectors (43A) of the first calibrated element positioned in contact with the magnetic sectors of the second calibrated element.
  5. The electromagnetic trip device according to claim 4, characterized in that the radial crown (33) comprises a plurality (N) of teeth (17), recessed areas (15) being situated between each tooth (17).
  6. The electromagnetic trip device according to claim 4, characterized in that the second calibrated element is integrated in the radial surface (11) of the shell (10) at the level of the opening (19) comprising a serrated periphery composed of a plurality (N) of teeth (17), recessed areas (15) being situated between each tooth (17).
  7. The electromagnetic trip device according to claim 6, characterized in that the recessed areas (15) situated between each tooth (17) accommodate one end of an insulating sheath (20), said end of the sheath (20) comprising a plurality (N) of axial protuberances secured by jamming in the recessed areas (15) of the opening (19).
  8. The electromagnetic trip device according to any one of the foregoing claims, characterized in that the intercalary adjustment means (40) comprise means (44) for blocking the first circular calibrated element with respect to a second circular calibrated element.
  9. The electromagnetic trip device according to any one of the foregoing claims, characterized in that all the magnetic sectors (43A) have equal surfaces, the magnetic sectors (43A) having the same surface as the non-magnetic sectors (43B).
  10. An electric switch apparatus provided with at least one movable contact operating in conjunction with at least one stationary contact, characterized in that it comprises an electromagnetic trip device (39) according to one of the foregoing claims acting on the movable contact or contacts.
EP11354023A 2010-07-02 2011-05-13 Electromagnetic tripping device for electric switchgear, electric switchgear comprising such a tripping device Active EP2402973B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002799A FR2962255B1 (en) 2010-07-02 2010-07-02 ELECTROMAGNETIC TRIGGER FOR ELECTRICAL DEVICE SWITCH, ELECTRICAL DEVICE SWITCH COMPRISING SUCH A TRIGGER.

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EP2402973B1 true EP2402973B1 (en) 2013-03-20

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EP (1) EP2402973B1 (en)
CN (1) CN102315052B (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT512262B1 (en) * 2011-12-09 2016-08-15 Eaton Ind Austria Gmbh METHOD FOR ADJUSTING A TRIP UNIT FOR A PROTECTION SWITCH
EP2911178B1 (en) * 2014-02-25 2017-09-13 Siemens Aktiengesellschaft Magnetic trip device of a thermal magnetic circuit breaker having an adjustment element
CN110739191B (en) * 2018-07-20 2022-03-04 施耐德电器工业公司 Electromagnetic release

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1391469A (en) * 1919-12-06 1921-09-20 Trumbull Electric Mfg Co Electromagnetic trip mechanism
DE3515530A1 (en) * 1985-04-30 1986-11-06 Brown, Boveri & Cie Ag, 6800 Mannheim MAGNETIC RELEASE
FR2673487B1 (en) 1991-02-28 1993-10-29 Telemecanique PROTECTION SWITCH INCORPORATING A TRIGGERING MAGNETOTHERMAL SUB-ASSEMBLY.
FR2753836B1 (en) * 1996-09-23 1998-10-30 ELECTROMAGNETIC TRIGGER FOR ELECTRIC PROTECTIVE APPARATUS
FR2779567B1 (en) 1998-06-03 2000-07-13 Hager Electro OPTIMIZED MAGNETIC SUB-ASSEMBLY
FR2868596B1 (en) * 2004-04-01 2006-05-26 Schneider Electric Ind Sas MAGNETIC SUBASSEMBLY OF AN ELECTRICAL DEVICE SWITCH
US7570140B2 (en) * 2006-03-02 2009-08-04 Eaton Corporation Magnetic trip mechanism including a plunger member engaging a support structure, and circuit breaker including the same

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US20120001708A1 (en) 2012-01-05
FR2962255A1 (en) 2012-01-06
US8476998B2 (en) 2013-07-02
FR2962255B1 (en) 2012-07-13
EP2402973A1 (en) 2012-01-04
CN102315052A (en) 2012-01-11
CN102315052B (en) 2015-04-22

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