EP2365510B1 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
EP2365510B1
EP2365510B1 EP10354083.7A EP10354083A EP2365510B1 EP 2365510 B1 EP2365510 B1 EP 2365510B1 EP 10354083 A EP10354083 A EP 10354083A EP 2365510 B1 EP2365510 B1 EP 2365510B1
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EP
European Patent Office
Prior art keywords
contact
strand
contact arm
arms
pivot
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EP10354083.7A
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German (de)
French (fr)
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EP2365510A1 (en
Inventor
Yves Belin
Christophe Michelot
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP2365510A1 publication Critical patent/EP2365510A1/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
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • each torsion spring comprises a first strand (35, 36) bearing against a stopper of the support lever and a second strand acting on one of the contact arms.
  • the second strand of each torsion spring cooperates with an abutment of the contact arm on which said torsion spring acts, said stop being offset relative to the pivot towards the second end of said contact arm.
  • the abutment of the contact arm is provided on the second end of said contact arm.
  • the circuit breaker 1 comprises an insulating housing 3 essentially formed by two half-shells, the upper half-shell having been removed to allow the inside of said circuit breaker to be seen.
  • the housing 3 has a parallelepipedal general shape corresponding to a modular system.
  • the housing 3 has a rear fixing surface 5 on a rail and a front face 7 having a passage opening of a control lever 9.
  • the circuit breaker 1 comprises a neutral cut-off circuit and a phase cut-off circuit arranged respectively on either side of an insulating partition 11 interposed between the two half-shells and extending parallel to the main faces of the housing 3. On the figure 1 only the phase-breaking circuit is visible, the neutral-breaking circuit being arranged behind the insulating partition 11.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention relève du domaine des dispositifs de coupure de type disjoncteur ou disjoncteur différentiel, notamment des disjoncteurs unipolaire et neutre. De tels disjoncteurs sont souvent utilisés dans les installations de distribution terminale, notamment dans les bâtiments, pour protéger un circuit électrique en coupant à la fois le conducteur de phase et le conducteur neutre.The invention relates to the field of circuit breaker or differential circuit breaker-type breaking devices, in particular unipolar and neutral circuit breakers. Such circuit breakers are often used in terminal distribution installations, especially in buildings, to protect an electrical circuit by cutting both the phase conductor and the neutral conductor.

L'invention concerne en particulier un dispositif de coupure à boîtier isolant renfermant des contacts mobiles, incluant au moins un contact mobile de phase et un contact mobile de neutre portés par une première extrémité de respectivement au moins deux bras de contact, chaque bras de contact étant monté autour d'un pivot pour au moins autoriser un pivotement dudit bras de contact vers une position de fermeture desdits contacts, ledit dispositif comportant des moyens de pression de contact agissant sur lesdits bras de contact pour exercer une force de pression de contact sur lesdits bras de contact.In particular, the invention relates to an insulating housing cut-off device containing movable contacts, including at least one moving phase contact and a moving neutral contact carried by a first end of at least two contact arms respectively, each contact arm. being mounted around a pivot to at least allow pivoting of said contact arm to a closed position of said contacts, said device having contact pressure means acting on said contact arms to exert a contact pressure force on said contact arms; contact arm.

ÉTAT DE LA TECHNIQUESTATE OF THE ART

La demande de brevet EP0042778 décrit un disjoncteur unipolaire et neutre comportant deux contacts mobiles de respectivement un circuit de phase et un circuit de neutre, lesdits contacts étant portés par des bras de contact en matériau isolant montés à pivotement autour d'un axe porté par un support en forme de plaque d'un mécanisme de commande, ledit support étant quant à lui monté à pivotement sur un axe fixe. Un ressort de pression de contact en spirale est monté autour de l'axe de pivotement des bras de contact et permet de solliciter lesdits bras de contact en position de fermeture des contacts mobiles.The patent application EP0042778 discloses a unipolar and neutral circuit breaker having two moving contacts of respectively a phase circuit and a neutral circuit, said contacts being carried by contact arms of insulating material pivotally mounted about an axis carried by a plate-shaped support a control mechanism, said support being pivotally mounted on a fixed axis. A spiral contact pressure spring is mounted around the axis of pivoting of the contact arms and makes it possible to urge said contact arms in the closed position of the movable contacts.

Document EP 1 146 534 décrit un dispositif de coupure selon le préambule de la revendication 1.Document EP 1 146 534 discloses a cut-off device according to the preamble of claim 1.

Un inconvénient des disjoncteurs de l'art antérieur est que le dimensionnement et la disposition du ressort de pression de contact ne sont pas optimisés.A disadvantage of circuit breakers of the prior art is that the dimensioning and the arrangement of the contact pressure spring are not optimized.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

L'invention vise à remédier aux inconvénients des dispositifs de coupure de l'art antérieur en proposant un dispositif de coupure à boîtier isolant renfermant des contacts mobiles, incluant au moins un contact mobile de phase et un contact mobile de neutre portés par une première extrémité de respectivement au moins deux bras de contact, chaque bras de contact étant monté autour d'un pivot pour au moins autoriser un pivotement dudit bras de contact vers une position de fermeture desdits contacts, ledit dispositif comportant des moyens de pression de contact agissant sur lesdits bras de contact pour exercer une force de pression de contact sur lesdits bras de contact, ledit dispositif étant caractérisé en ce que les moyens de pression de contact comportent deux ressorts de torsion agissant indépendamment sur respectivement ledit bras de contact portant le contact mobile de phase et ledit bras de contact portant le contact mobile de neutre, chaque ressort de torsion exerçant une force de torsion autour d'un axe de rotation dudit ressort, chaque ressort de torsion étant agencé par rapport au bras de contact sur lequel il agit de manière que l'axe de rotation dudit ressort soit décalé vers une seconde extrémité dudit bras de contact, par rapport à l'axe dudit pivot.The aim of the invention is to remedy the drawbacks of the prior art cut-off devices by proposing an insulating housing cut-off device enclosing movable contacts, including at least one moving phase contact and a moving neutral contact carried by a first end. of respectively at least two contact arms, each contact arm being mounted around a pivot to at least allow pivoting of said contact arm to a closed position of said contacts, said device comprising contact pressure means acting on said contact arm for exerting a contact pressure force on said contact arms, said device being characterized in that the contact pressure means comprise two torsion springs acting independently on said contact arm respectively carrying the moving phase contact and said contact arm carrying the movable contact of neutral, each torsion spring exer a torsional force about an axis of rotation of said spring, each torsion spring being arranged relative to the contact arm on which it acts so that the axis of rotation of said spring is shifted to a second end of said arm of contact, relative to the axis of said pivot.

Le dispositif comprend un mécanisme de commande pourvu d'un levier support portant le pivot autour duquel les bras de contact sont montés, ledit levier support étant articulé pour déplacer les bras de contact entre une position d'ouverture et la position de fermeture desdits contacts mobiles, chaque ressort de torsion étant disposé entre le bras de contact sur lequel ledit ressort de torsion agit et ledit levier support.The device comprises a control mechanism provided with a support lever carrying the pivot about which the contact arms are mounted, said support lever being articulated to move the contact arms between an open position and the closed position of said movable contacts. , each torsion spring being disposed between the contact arm on which said torsion spring acts and said support lever.

De préférence, le levier support est articulé autour d'un axe confondu avec l'axe du pivot.Preferably, the support lever is articulated around an axis coinciding with the axis of the pivot.

Selon un mode de réalisation, chaque ressort de torsion comporte un premier brin (35, 36) s'appuyant contre un butoir du levier support et un second brin agissant sur l'un des bras de contact. De préférence, le second brin de chaque ressort de torsion coopère avec une butée du bras de contact sur lequel ledit ressort de torsion agit, ladite butée étant décalée par rapport au pivot vers la seconde extrémité dudit bras de contact. De préférence, la butée du bras de contact est ménagée sur la seconde extrémité dudit bras de contact.According to one embodiment, each torsion spring comprises a first strand (35, 36) bearing against a stopper of the support lever and a second strand acting on one of the contact arms. Preferably, the second strand of each torsion spring cooperates with an abutment of the contact arm on which said torsion spring acts, said stop being offset relative to the pivot towards the second end of said contact arm. Preferably, the abutment of the contact arm is provided on the second end of said contact arm.

Selon un mode de réalisation, le premier brin de chaque ressort de contact a une longueur supérieure à la longueur du second brin dudit ressort de contact. De préférence, la longueur du premier brin est supérieure à au moins deux fois la longueur du second brin.According to one embodiment, the first strand of each contact spring has a length greater than the length of the second strand of said contact spring. Preferably, the length of the first strand is greater than at least twice the length of the second strand.

Selon un mode de réalisation, les premiers brins des ressorts de torsion sont connectés pour former un ensemble élastique comportant lesdits deux ressorts de torsion.According to one embodiment, the first strands of the torsion springs are connected to form an elastic assembly comprising said two torsion springs.

De préférence, le mécanisme de commande comprend, en outre :

  • une manette montée pivotante sur le boitier isolant pour commander l'ouverture et la fermeture des contacts mobiles,
  • des moyens de transmission agencés entre ladite manette et les bras de contact incluant une liaison mécanique brisable, et
  • un levier de déclenchement couplé à des moyens de déclenchement pour détecter la présence d'un défaut électrique, ledit levier de déclenchement étant conçu pour actionner le déplacement des bras de contact dans la position d'ouverture en provoquant une rupture de ladite liaison mécanique brisable.
Preferably, the control mechanism further comprises:
  • a handle pivotally mounted on the insulating housing to control the opening and closing of the movable contacts,
  • transmission means arranged between said handle and the contact arms including a breakable mechanical connection, and
  • a trip lever coupled to trip means for detecting the presence of an electrical fault, said trip lever being adapted to actuate the movement of the contact arms in the open position by causing a break in said breakable mechanical link.

BRÈVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui suit de modes particuliers de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et représentés dans les figures annexées.

  • La figure 1 est une vue à l'intérieur d'un disjoncteur selon l'invention représentant la plupart des éléments du mécanisme de commande.
  • La figure 2 est une vue partielle du mécanisme de commande, dans laquelle l'un des bras de contact a été démonté pour permettre de visualiser le levier support et les moyens de pression de contact.
  • La figure 3 est une vue du mécanisme de commande, dans laquelle sont représentés la plupart des éléments de la chaîne cinématique entre la poignée de manoeuvre et les contacts mobiles.
  • La figure 4 correspond à la figure 3, dans laquelle l'un des bras de contact a été démonté pour permettre de visualiser les moyens de pression de contact.
  • La figure 5 est une vue éclatée des bras de contact, du levier support et des moyens de pression de contact.
  • La figure 6 est une vue éclatée du mécanisme de commande et du mécanisme de déclenchement.
Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention, given by way of non-limiting examples, and shown in the accompanying figures.
  • The figure 1 is a view inside a circuit breaker according to the invention representing most elements of the control mechanism.
  • The figure 2 is a partial view of the control mechanism, in which one of the contact arms has been disassembled to allow visualization of the support lever and the contact pressure means.
  • The figure 3 is a view of the control mechanism, in which are represented most elements of the drive train between the operating handle and the moving contacts.
  • The figure 4 corresponds to the figure 3 , in which one of the contact arms has been disassembled to allow visualization of the contact pressure means.
  • The figure 5 is an exploded view of the contact arms, the support lever and the contact pressure means.
  • The figure 6 is an exploded view of the control mechanism and the trigger mechanism.

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

Comme cela est visible sur la figure 1, le disjoncteur 1 comprend un boîtier isolant 3 essentiellement formé par deux demi-coquilles, la demi-coquille supérieure ayant été enlevée pour permettre de visualiser l'intérieur dudit disjoncteur. Le boîtier 3 présente une forme générale parallélépipédique correspondant à un système modulaire. Le boîtier 3 présente une face arrière de fixation 5 sur un rail et une face frontale 7 présentant une lumière de passage d'une manette de commande 9. Le disjoncteur 1 comprend un circuit de coupure de neutre et un circuit de coupure de phase disposés respectivement de part et d'autre d'une cloison isolante 11 intercalée entre les deux demi-coquilles et s'étendant parallèlement aux faces principales du boîtier 3. Sur la figure 1, seul le circuit de coupure de phase est visible, le circuit de coupure de neutre étant disposé derrière la cloison isolante 11.As is visible on the figure 1 , the circuit breaker 1 comprises an insulating housing 3 essentially formed by two half-shells, the upper half-shell having been removed to allow the inside of said circuit breaker to be seen. The housing 3 has a parallelepipedal general shape corresponding to a modular system. The housing 3 has a rear fixing surface 5 on a rail and a front face 7 having a passage opening of a control lever 9. The circuit breaker 1 comprises a neutral cut-off circuit and a phase cut-off circuit arranged respectively on either side of an insulating partition 11 interposed between the two half-shells and extending parallel to the main faces of the housing 3. On the figure 1 only the phase-breaking circuit is visible, the neutral-breaking circuit being arranged behind the insulating partition 11.

Le circuit de coupure de phase comporte un contact mobile de phase 13 porté par une première extrémité d'un bras de contact 15. De la même façon, le circuit de coupure de neutre comporte un contact mobile de neutre 17 porté par une première extrémité d'un autre bras de contact 19. Les bras de contact 15, 19 sont réalisés dans un matériau isolant et sont montés à pivotement sur un pivot 21.The phase-breaking circuit comprises a mobile phase contact 13 carried by a first end of a contact arm 15. In the same way, the neutral cut-off circuit comprises a moving neutral contact 17 carried by a first end of Another contact arm 19. The contact arms 15, 19 are made of an insulating material and are pivotally mounted on a pivot 21.

Le disjoncteur 1 comporte un mécanisme de commande logé dans la partie supérieure du boîtier 3, au-dessus de la cloison isolante 11. Ce mécanisme de commande est commun au contact mobile de phase 13 et au contact mobile de neutre 17. Le pivot 21 d'articulation des bras de contact 15, 19 est porté par un levier support 23 (figure 5) en forme de plaque, souvent appelé platine, ledit levier support étant monté à pivotement sur le boîtier. En l'occurrence, le levier support 23 est monté à pivotement autour d'un axe parallèle et confondu avec l'axe du pivot 21 d'articulation des bras de contact 15, 19. L'axe de pivotement du levier support 23 et le pivot d'articulation des bras de contact 15, 19 sont matérialisés par un arbre 21 solidaire dudit levier support 23. Les extrémités de l'arbre 21 sont montées dans des paliers ménagés dans les demi-coquilles du boîtier 3. Les bras de contact 15, 19 comportent également des paliers permettant d'emmancher lesdits bras de contact 15, 19 sur l'arbre 21 respectivement de part et d'autre du levier support 23.The circuit breaker 1 comprises a control mechanism housed in the upper part of the housing 3, above the insulating partition 11. This control mechanism is common to the movable phase contact 13 and the moving neutral contact 17. The pivot 21 articulation of the contact arms 15, 19 is carried by a support lever 23 ( figure 5 ) in the form of a plate, often called platinum, said support lever being pivotally mounted on the housing. In this case, the support lever 23 is pivotally mounted about an axis parallel to and coincident with the axis of the fulcrum pivot 21 of the contact arms 15, 19. The pivot axis of the support lever 23 and the articulation pivot of the contact arms 15, 19 are materialized by a shaft 21 secured to said support lever 23. The ends of the shaft 21 are mounted in bearings formed in the half-shells of the housing 3. The contact arms 15, 19 also comprise bearings for driving said arms contact 15, 19 on the shaft 21 respectively on either side of the support lever 23.

Le montage à pivotement du levier support 23 sur le boîtier 3 permet le déplacement des bras de contact 15, 19 entre une position d'ouverture des contacts mobiles 13, 17 et une position de fermeture desdits contacts mobiles. Le levier support 23 porte des butées susceptibles de coopérer avec les bras de contact 15, 19 pour les entraîner en rotation autour de l'arbre 21 vers la position de fermeture des contacts mobiles 13, 17. Un ressort 90 monté entre boîtier et le levier support 23 permet de solliciter le levier support 23 en rotation autour de l'arbre 21 vers la position d'ouverture des contacts mobiles 13, 17.The pivotal mounting of the support lever 23 on the housing 3 allows the movement of the contact arms 15, 19 between an open position of the movable contacts 13, 17 and a closed position of said movable contacts. The support lever 23 carries stops capable of cooperating with the contact arms 15, 19 to rotate them around the shaft 21 towards the closed position of the movable contacts 13, 17. A spring 90 mounted between the housing and the lever support 23 makes it possible to urge the support lever 23 in rotation around the shaft 21 towards the open position of the movable contacts 13, 17.

Le montage à pivotement des bras de contact 15, 19 sur le levier support 23 permet, quant à lui, un débattement limité desdits bras de contact, notamment lorsque le levier support 23 a été pivoté dans la position de fermeture des contacts mobiles 13, 17.The pivotal mounting of the contact arms 15, 19 on the support lever 23 allows, for its part, a limited movement of said contact arms, in particular when the support lever 23 has been pivoted in the closed position of the movable contacts 13, 17 .

Chacun des bras de contact 15, 19 comportent un écran 26 qui permet d'éviter que des particules générées par l'arc électrique ne viennent s'immiscer dans le mécanisme de commande. L'écran 26 est agencé pour coulisser le long d'une paroi fixe 61 afin d'assurer la fonction d'écran pendant au moins le début de l'ouverture des contacts. Les faces de l'écran 26 et de la paroi fixe 27 en vis-à-vis sont disposées suffisamment proches l'une de l'autre, pour permettre à ladite paroi fixe de racler la face dudit écran exposée à l'arc électrique, ce qui permet d'éviter toute accumulation de dépôt.Each of the contact arms 15, 19 comprise a screen 26 which makes it possible to prevent particles generated by the electric arc from being interfered with in the control mechanism. The screen 26 is arranged to slide along a fixed wall 61 to ensure the screen function during at least the beginning of the opening of the contacts. The faces of the screen 26 and the fixed wall 27 facing each other are arranged sufficiently close to each other, to allow said fixed wall to scrape the face of said screen exposed to the electric arc, which makes it possible to avoid any deposit accumulation.

Le mécanisme de commande comporte des moyens de pression de contact agissant sur les bras de contact 15, 19 pour exercer une force de pression sur lesdits bras de contact et pour contraindre lesdits bras de contact dans la position de fermeture des contacts mobiles 13, 17. Les moyens de pression de contact comportent deux ressorts de torsion 31, 32 agissant respectivement sur le bras de contact 15 portant le contact mobile de phase 13 et sur le bras de contact 19 portant le contact mobile de neutre 17. Chaque ressort de torsion 31, 32 est pourvu d'un axe de rotation autour duquel il exerce une force de torsion. Les ressorts de torsion 31, 32 sont montés de sorte que leurs axes de rotation respectifs soient déportés par rapport à l'arbre 21 vers une seconde extrémité des bras de contact. Cette seconde extrémité des bras de contact 15, 19 est en l'occurrence opposée par rapport à la première extrémité desdits bras portant les contacts mobiles 13, 17. Ce positionnement des ressorts 31, 32 et de leurs axes de rotation respectifs permet de démultiplier la force exercée par lesdits ressorts sur les bras de contact 15, 19 et donc sur les contacts mobiles 13, 17 portés par lesdits bras de contact. Ce positionnement des ressorts 31, 32, et notamment le positionnement de leurs axes de rotation respectifs, permet également de réduire leurs dimensions.The control mechanism comprises contact pressure means acting on the contact arms 15, 19 to exert a pressing force on said contact arms and to force said contact arms in the closed position of the movable contacts 13, 17. The contact pressure means comprise two torsion springs 31, 32 respectively acting on the contact arm 15 carrying the moving phase contact 13 and on the contact arm 19 carrying the moving neutral contact 17. Each torsion spring 31, 32 is provided with an axis of rotation about which it exerts a torsion force. The torsion springs 31, 32 are mounted so that their respective axes of rotation are offset relative to the shaft 21 towards a second end of the contact arms. This second end of the contact arms 15, 19 is in this case opposite to the first end of said arms carrying the movable contacts 13, 17. This positioning of the springs 31, 32 and their respective axes of rotation can increase the force exerted by said springs on the contact arms 15, 19 and thus on the movable contacts 13, 17 carried by said contact arms. This positioning of the springs 31, 32, and in particular the positioning of their respective axes of rotation, also makes it possible to reduce their dimensions.

Plus précisément, chaque ressort de torsion 31, 32 est disposé entre le bras de contact 15, 19 sur lequel ledit ressort de torsion agit et le levier support 23. De cette façon, les ressorts de torsion 31, 32 sont dimensionnés pour exercer une pression de fermeture des contacts mobiles 13, 17 permettant un pivotement limité des bras de contact 15, 19 par rapport au levier support, en fonction des l'état d'usure desdits contacts. Les ressorts de torsion 31, 32 ne sont pas dimensionnés pour faire pivoter les bras de contact 15, 19 de la position d'ouverture à la position de fermeture des contacts 13, 17, cette fonction étant remplie par le levier support 23. Le dimensionnement des ressorts de torsion 31, 32 est donc réalisé par rapport uniquement à l'effort de pression de contact à exercer, et les dimensions desdits ressorts s'en trouvent donc réduites.More specifically, each torsion spring 31, 32 is disposed between the contact arm 15, 19 on which said torsion spring acts and the support lever 23. In this way, the torsion springs 31, 32 are sized to exert pressure closing the movable contacts 13, 17 allowing limited pivoting of the contact arms 15, 19 relative to the support lever, depending on the state of wear of said contacts. The torsion springs 31, 32 are not dimensioned to pivot the contact arms 15, 19 from the open position to the closed position of the contacts 13, 17, this function being fulfilled by the support lever 23. The sizing torsion springs 31, 32 is therefore made with respect only to the contact pressure force to be exerted, and the dimensions of said springs are thus reduced.

Comme cela est visible sur les figures 2 et 4, les ressorts de torsion 31, 32 utilisés sont des ressorts à spires. Chaque ressort de torsion 31, 32 comporte un premier brin 35, 36 s'appuyant contre un butoir 39 du levier support et un second brin 41, 42 agissant sur l'un desdits bras de contact 15, 19. Le second brin 41, 42 de chaque ressort de torsion 31, 32 coopère avec une butée 45, 46 du bras de contact 15, 19 sur lequel ledit ressort de torsion agit. Cette butée 45, 46 est déportée par rapport à l'arbre 21, matérialisant le pivot du bras de contact 15, 19, vers la seconde extrémité dudit bras de contact opposée par rapport à la première extrémité portant les contacts mobiles 13, 17. En l'occurrence, la butée 45, 46 du bras de contact 15, 19 est ménagée sur la seconde extrémité dudit bras de contact. Ainsi, la pression de contact exercée par les ressorts de torsion 31, 32 s'en trouve maximisée.As is visible on the figures 2 and 4 , the torsion springs 31, 32 used are coil springs. Each torsion spring 31, 32 comprises a first strand 35, 36 bearing against a stopper 39 of the support lever and a second strand 41, 42 acting on one of said contact arms 15, 19. The second strand 41, 42 each torsion spring 31, 32 cooperates with a stop 45, 46 of the contact arm 15, 19 on which said torsion spring acts. This abutment 45, 46 is offset relative to the shaft 21, materializing the pivot of the contact arm 15, 19, towards the second end of said opposite contact arm relative to the first end carrying the movable contacts 13, 17. In this case, the abutment 45, 46 of the contact arm 15, 19 is formed on the second end of said contact arm. Thus, the contact pressure exerted by the torsion springs 31, 32 is maximized.

Les spires des ressorts de torsion 31, 32 entourant l'axe de rotation desdits ressorts sont déportés par rapport à l'arbre 21. De cette façon, en plus d'augmenter la force de pression de contact et de réduire les dimensions des moyens de pression de contact 31, 32, l'encombrement du mécanisme de commande au niveau de l'arbre 21 est réduit. Vue la complexité du mécanisme de commande concernant les articulations autour de l'arbre 21, ce déport des spires des ressorts de torsion 31, 32 par rapport à l'arbre 21 permet de simplifier ledit mécanisme de commande et de faciliter son assemblage.The turns of the torsion springs 31, 32 surrounding the axis of rotation of said springs are offset relative to the shaft 21. In this way, in addition to increasing the contact pressure force and reducing the dimensions of the means of contact pressure 31, 32, the size of the control mechanism at the shaft 21 is reduced. Given the complexity of the control mechanism concerning the articulations around the shaft 21, this offset of the turns of the torsion springs 31, 32 with respect to the shaft 21 makes it possible to simplify said control mechanism and to facilitate its assembly.

Dans le mode de réalisation représenté, les premiers brins 35, 36 des ressorts de torsion 31, 32 sont connectés entre eux pour former un seul ensemble élastique intégrant lesdits ressorts de torsion. Comme cela est visible sur les figures 2 et 4, le premier brin 35, 36 de chaque ressort de torsion 31, 32 a une longueur supérieure à la longueur du second brin 41, 42 dudit ressort de torsion. Plus précisément, la longueur du premier brin 35, 36 est supérieure à au moins deux fois la longueur du second brin 41, 42. Cet agencement permet notamment de faciliter l'assemblage du mécanisme de commande, notamment grâce à la longueur des brins qui permet la flexion nécessaire au montage sur les axes des ressorts.In the embodiment shown, the first strands 35, 36 of the torsion springs 31, 32 are connected together to form a single elastic assembly incorporating said torsion springs. As is visible on the figures 2 and 4 the first strand 35, 36 of each torsion spring 31, 32 has a length greater than the length of the second strand 41, 42 of said torsion spring. More specifically, the length of the first strand 35, 36 is greater than at least twice the length of the second strand 41, 42. This arrangement makes it possible in particular to facilitate the assembly of the control mechanism, notably thanks to the length of the strands which allows the bending necessary for mounting on the axes of the springs.

Le mécanisme de commande du disjoncteur peut être tel que celui décrit dans la demande de brevet européenne EP0295158 .The control mechanism of the circuit breaker can be such as that described in the European patent application EP0295158 .

Dans le mode de réalisation représenté, le mécanisme de commande comprend des moyens de transmission agencés entre la manette 9 et les bras de contact 15, 19, ou plus précisément entre ladite manette et le levier support 23. Ces moyens de transmission permettent de déplacer le levier support 23 entre la position d'ouverture et la position de fermeture des contacts mobiles 13, 17.In the embodiment shown, the control mechanism comprises transmission means arranged between the lever 9 and the contact arms 15, 19, or more precisely between said lever and the support lever 23. These transmission means make it possible to move the support lever 23 between the open position and the closed position of the movable contacts 13, 17.

Comme cela est visible sur la figure 6, un levier de déclenchement 53 couplé à des moyens de déclenchement permet de détecter la présence d'un défaut électrique et d'agir sur le mécanisme de commande pour ouvrir les contacts du disjoncteur. Les moyens de déclenchement incluent un déclencheur électromagnétique 55 et un déclencheur thermique, en l'occurrence une bilame 57. Le levier de déclenchement 53 est monté à pivotement sur un axe 59 porté par le levier support 23, avec un décalage prédéterminé par rapport au pivot 21. Le levier de déclenchement 53 est conçu pour actionner le déplacement des bras de contact 15, 19 dans la position d'ouverture en provoquant la rupture d'une liaison mécanique brisable 61 des moyens de transmission (figures 1 et 2).As is visible on the figure 6 a trip lever 53 coupled to tripping means makes it possible to detect the presence of an electrical fault and to act on the control mechanism to open the contacts of the circuit breaker. The triggering means include an electromagnetic release 55 and a thermal release, in this case a bimetallic strip 57. The release lever 53 is pivotally mounted on an axis 59 carried by the support lever 23, with a predetermined offset with respect to the pivot 21. The release lever 53 is designed to actuate the displacement of the contact arms 15, 19 in the open position by causing the breaking of a breakable mechanical link 61 of the transmission means (FIG. figures 1 and 2 ).

Les moyens de transmission incluent une biellette de transmission 51 accouplée à une embase interne de la manette pour former une genouillère dont l'articulation se trouve excentrée par rapport à un axe de pivotement 63 de ladite manette. La liaison mécanique brisable 61 est ménagée entre la biellette de transmission 51 et le levier support 23. En position verrouillée, la liaison mécanique brisable 61 autorise la commande manuelle du mécanisme de commande à l'aide de la manette 9. Le déplacement du levier de déclenchement 53 vers une position déclenchée sous l'action du déclencheur 55, provoque la rupture momentanée de la liaison mécanique 61, entraînant le déclenchement automatique du mécanisme de commande, indépendamment de la manette 9. Le levier de déclenchement 53 est associé à un ressort de rappel (non représenté) destiné à assurer le rétablissement automatique de la liaison mécanique 61 lorsque la manette 9 est actionnée vers la position d'ouverture, suite à un déclenchement du mécanisme de commande sur défaut.The transmission means include a transmission rod 51 coupled to an internal base of the lever to form a toggle joint whose articulation is eccentric with respect to a pivot axis 63 of said joystick. The breakable mechanical link 61 is formed between the transmission rod 51 and the support lever 23. In the locked position, the breakable mechanical link 61 allows the manual control of the control mechanism by means of the lever 9. The movement of the lever triggering 53 to a triggered position under the action of the trigger 55, causes the momentary break of the mechanical link 61, causing the automatic triggering of the control mechanism, independently of the lever 9. The release lever 53 is associated with a spring of recall (not shown) for ensuring the automatic restoration of the mechanical link 61 when the lever 9 is actuated to the open position, following a triggering of the fault control mechanism.

Comme cela est visible sur la figure 6, la liaison mécanique brisable 61 comporte un crochet 65 d'accrochage monté à pivotement sur un axe 67 du levier support 23. A l'opposé de l'axe 67, le bec 69 du crochet coopère en position verrouillée de la liaison 61 avec un cran 71 de retenue situé sur le bras supérieur du levier de déclenchement 53. La biellette de transmission 51 est accouplée au crochet 65 en un point d'articulation susceptible de se déplacer lors du déclenchement dans une lumière du levier support 23. Cette lumière est borgne ou ouverte, et est conformée en un secteur circulaire centré sur l'axe 67. Le point d'articulation est situé entre l'axe 67 et le bec 69 du crochet d'accrochage. La liaison mécanique brisable 61 constitue un étage démultiplicateur dans la chaîne cinématique du mécanisme de commande, autorisant une réduction de l'effort de déclenchement en provenance du déclencheur magnétothermique.As is visible on the figure 6 , the breakable mechanical link 61 comprises a catch hook 65 pivotally mounted on an axis 67 of the support lever 23. At the opposite of the axis 67, the hook spike 69 cooperates in the locked position of the link 61 with a notch 71 located on the upper arm of the trip lever 53. The transmission rod 51 is coupled to the hook 65 at a hinge point may move when triggered in a light lever support 23. This light is blind or open, and is shaped in a circular sector centered on the axis 67. The hinge point is located between the axis 67 and the beak 69 of the hook hook. The breakable mechanical link 61 constitutes a reduction stage in the kinematic chain of the control mechanism, allowing a reduction of the triggering force from the magnetothermal release.

Comme cela est visible sur les figures 2 et 6, la bilame 57 du déclencheur thermique coopère avec le levier de déclenchement 53 au moyen d'un tiroir rotatif 81 à transmission unidirectionnelle. Le tiroir 81 est formé par un levier coudé ayant une extrémité accouplée librement au bras inférieur du levier de déclenchement 53 en un point d'articulation 83. La partie intermédiaire incurvée du levier de transmission prend appui sur un bossage 85 du levier de déclenchement 53 de manière à entraîner ce dernier vers la position déclenchée lors de la déflexion vers la droite de la bilame 51 en cas de circulation d'un courant de surcharge dans le pôle. Pendant cette phase de déclenchement thermique, le tiroir 81 constitue une liaison cinématique rigide entre la bilame 57 et le levier de déclenchement 53. Le point d'articulation 83 est disposé entre le bossage 85 et l'axe de pivotement 21 du levier de déclenchement 53. Le but de cet agencement de l'axe de pivotement 83 au plus prêt de l'axe de pivotement 21 est de minimiser le déplacement de l'axe 83 le long d'un arc de cercle centré sur l'axe 21, voir de le rendre nul, lorsque le déclencheur magnétique 55 propulse le levier support 23.As is visible on the figures 2 and 6 the bimetallic strip 57 of the thermal actuator cooperates with the trip lever 53 by means of a rotary slide valve 81 with unidirectional transmission. The slide 81 is formed by a bent lever having one end freely coupled to the lower arm of the release lever 53 at a hinge point 83. The curved intermediate portion of the transmission lever is supported on a boss 85 of the release lever 53 of in order to drive the latter to the triggered position during the deflection to the right of the bimetallic strip 51 in the event of circulation of a current of overload in the pole. During this thermal trip phase, the slide 81 constitutes a rigid kinematic link between the bimetallic strip 57 and the trip lever 53. The hinge point 83 is disposed between the boss 85 and the pivot axis 21 of the trip lever 53. The purpose of this arrangement of the pivot axis 83 closest to the pivot axis 21 is to minimize the displacement of the axis 83 along an arc of a circle centered on the axis 21, see FIG. make it null, when the magnetic release 55 propels the support lever 23.

Lorsque le mécanisme de commande est actionné manuellement ou automatiquement vers la position d'ouverture, l'extrémité 87 du tiroir 81 à l'opposé du point d'articulation 83, est susceptible de venir en butée contre une protubérance du boîtier, avec rupture de la liaison cinématique avec le levier de déclenchement 53. Le levier support 23 peut pivoter autour du pivot 21 dans le sens trigométrique, et la zone intermédiaire du tiroir 81 se trouve écartée du bossage 85. Le point d'articulation 83 du tiroir 81 pourrait bien entendu être confondu avec l'axe 21 de pivotement du levier de déclenchement 53.When the control mechanism is actuated manually or automatically to the open position, the end 87 of the slide 81 opposite the hinge point 83 is capable of abutting against a protuberance of the housing, with rupture of the kinematic connection with the release lever 53. The support lever 23 can pivot about the pivot 21 in the trigometric direction, and the intermediate zone of the slide 81 is spaced from the boss 85. The pivot point 83 of the slide 81 may well heard to be confused with the pivot axis 21 of the trip lever 53.

Le fonctionnement d'un tel mécanisme de commande est bien connu des spécialistes, et il est inutile de le décrire plus en détails. Ce fonctionnement est également décrit dans la demande de brevet EP0295158 .The operation of such a control mechanism is well known to those skilled in the art, and it is unnecessary to describe it in more detail. This operation is also described in the patent application EP0295158 .

Claims (9)

  1. A switchgear device (1) with an insulating case (3) housing movable contacts, including at least one phase movable contact (13) and one neutral movable contact (17) supported by a first end of respectively at least two contact arms (15, 19), each contact arm being mounted around a pivot-pin (21) to at least allow swivelling of said contact arm to a closed position of said contacts, said device comprising contact pressure means acting on said contact arms to exert a contact pressure force on said contact arms,
    the contact pressure means comprising two torsion springs (31, 32) acting independently on respectively said contact arm supporting the phase movable contact and said contact arm supporting the neutral movable contact, each torsion spring exerting a torsional force around an axis of rotation of said spring, said device comprising an operating mechanism provided with a support lever (23) supporting the pivot-pin (21) around which the contact arms are fitted, said support lever being articulated to move the contact arms between an open position and the closed position of said movable contacts characterized each torsion spring is arranged with respect to the contact arm on which it acts in such a way that the axis of rotation of said spring is offset towards a second end of said contact arm with respect to the axis of said pivot-pin, and in that each torsion spring (31, 32) is arranged between the contact arm (15, 19) on which said torsion spring acts and said support lever.
  2. The device according to claim 1, characterized in that the support lever (23) is articulated around an axis that is identical to the axis of the pivot-pin (21).
  3. The device according to claim 1 or 2, characterized in that each torsion spring (31, 32) comprises a first strand (35, 36) pressing against a stop block (39) of the support lever (23) and a second strand (41, 42) acting on one of the contact arms (15, 19).
  4. The device according to claim 3, characterized in that the second strand (41, 42) of each torsion spring (31, 32) collaborates with a stop (45, 46) of the contact arm (15, 19) on which said torsion spring acts, said stop being offset with respect to the pivot-pin (21) towards the second end of said contact arm.
  5. The device according to claim 4, characterized in that the stop (45, 46) of the contact arm (15, 19) is arranged on the second end of said contact arm.
  6. The device according to any one of claims 3 to 5, characterized in that the length of the first strand (35, 36) of each contact spring (31, 32) is greater than the length of the second strand (41, 42) of said contact spring.
  7. The device according to claim 6, characterized in that the length of the first strand (35, 36) is more than at least twice the length of the second strand (41, 42).
  8. The device according to any one of claims 3 to 7, characterized in that the first strands (35, 36) of the torsion springs (31, 32) are connected to form a flexible assembly comprising said two torsion springs.
  9. The device according to any one of claims 1 to 8, characterized in that the operating mechanism further comprises:
    - a handle (9) mounted swivelling on the insulating case (3) to command opening and closing of the movable contacts (13, 17),
    - transmission means arranged between said handle and the contact arms (15, 19) including a breakable mechanical link (61), and
    - a trip lever (53) coupled to trip means (55, 57) to detect the presence of an electric fault, said trip lever being designed to actuate movement of the contact arms (15, 19) to the open position causing breaking of said breakable mechanical link.
EP10354083.7A 2010-03-01 2010-11-29 Circuit breaker Active EP2365510B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1000821A FR2956922B1 (en) 2010-03-01 2010-03-01 CUTTING DEVICE

Publications (2)

Publication Number Publication Date
EP2365510A1 EP2365510A1 (en) 2011-09-14
EP2365510B1 true EP2365510B1 (en) 2013-11-13

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EP10354083.7A Active EP2365510B1 (en) 2010-03-01 2010-11-29 Circuit breaker

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EP (1) EP2365510B1 (en)
CN (1) CN102194617B (en)
ES (1) ES2531060T3 (en)
FR (1) FR2956922B1 (en)
RU (1) RU2549366C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2996678B1 (en) 2012-10-05 2014-10-31 Schneider Electric Ind Sas DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION DEVICE AND ELECTRICAL PROTECTION APPARATUS COMPRISING IT
CN104134588B (en) * 2014-07-17 2016-03-02 正泰集团股份有限公司 A kind of operating means of multipole small-size circuit breaker
CN104167333B (en) * 2014-08-20 2016-01-06 加西亚电子电器有限公司 A kind of miniature circuit breaker
CN105590804B (en) * 2014-11-04 2018-03-27 西门子公司 The brake separating mechanism and its breaker of breaker

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485254A1 (en) * 1980-06-19 1981-12-24 Merlin Gerin MINIATURE UNIPOLAR AND NEUTRAL CIRCUIT BREAKER
FR2584531B1 (en) * 1985-07-05 1989-01-13 Telemecanique Electrique CURRENT LIMITER PROVIDED WITH A DISPLAY ELEMENT
DE3708807A1 (en) * 1987-03-18 1988-10-06 Licentia Gmbh ELECTRICAL CIRCUIT BREAKER WITH AN ELECTRO-DYNAMIC OPENING CONTACT SYSTEM
FR2616583B1 (en) 1987-06-09 1995-01-06 Merlin Gerin CONTROL MECHANISM OF A MINIATURE ELECTRIC CIRCUIT BREAKER
JPH0810924Y2 (en) * 1990-07-10 1996-03-29 テンパール工業株式会社 Circuit breaker
ATE121217T1 (en) * 1992-05-13 1995-04-15 Hager Electro PHASE AND NEUTRAL CIRCUIT SWITCH.
FR2723470A1 (en) * 1994-08-04 1996-02-09 Legrand Sa BREAKER
EP1146534B1 (en) * 2000-04-11 2002-01-02 Felten & Guilleaume KG Switching mechanism for a circuit breaker
DE10204226C1 (en) * 2002-01-30 2003-04-24 Siemens Ag Switchgear installation plug-in module has operating device for auxiliary separation contacts and contact device displaced by slider controlled by rotary shaft of operating device
ITMI20050042A1 (en) * 2005-01-17 2006-07-18 Vimar Spa MAGNETO-THERMAL-DIFFERENTIAL SWITCH
US7566840B2 (en) * 2007-10-04 2009-07-28 General Electric Company Contact arm mechanism for circuit breaker

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CN102194617A (en) 2011-09-21
CN102194617B (en) 2014-12-31
FR2956922A1 (en) 2011-09-02
EP2365510A1 (en) 2011-09-14
FR2956922B1 (en) 2012-08-24
RU2549366C2 (en) 2015-04-27
ES2531060T3 (en) 2015-03-10
RU2011107621A (en) 2012-09-10

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