EP0619593B1 - Multipole current limiting circuit breaker with electrodynamic repulsion - Google Patents

Multipole current limiting circuit breaker with electrodynamic repulsion Download PDF

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Publication number
EP0619593B1
EP0619593B1 EP19940420094 EP94420094A EP0619593B1 EP 0619593 B1 EP0619593 B1 EP 0619593B1 EP 19940420094 EP19940420094 EP 19940420094 EP 94420094 A EP94420094 A EP 94420094A EP 0619593 B1 EP0619593 B1 EP 0619593B1
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EP
European Patent Office
Prior art keywords
bar
contact
movable contact
circuit breaker
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19940420094
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German (de)
French (fr)
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EP0619593A1 (en
Inventor
Jean-Luc Payet-Burin
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Schneider Electric SE
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Schneider Electric SE
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Publication date
Priority to FR9304298 priority Critical
Priority to FR9304298A priority patent/FR2703824B1/en
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0619593A1 publication Critical patent/EP0619593A1/en
Application granted granted Critical
Publication of EP0619593B1 publication Critical patent/EP0619593B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20Bridging contacts
    • H01H1/2066Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H2001/223Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member using a torsion spring

Description

  • L'invention est relative à un disjoncteur limiteur multipolaire à boîtier isolant moulé, renfermant : The invention relates to a multi-limiting circuit breaker with a molded insulating casing, comprising:
    • un dispositif interrupteur de courant ayant par pôle des éléments de contacts séparables, à répulsion électrodynamique, et au moins une chambre d'extinction d'arc, a current interrupting device having per pole separable contact elements, electrodynamic repulsion, and at least one arc extinguishing chamber,
    • un mécanisme de commande à genouillère associée à un ressort d'embiellage, et à un dispositif de déclenchement, a toggle control mechanism associated with a connecting rod spring, and a trigger device,
    • un barreau de commutation en matériau isolant servant de support aux contacts mobiles de l'ensemble des pôles, ledit barreau étant accouplé mécaniquement à la genouillère pour être déplacé par le mécanisme entre la position de fermeture, et la position d'ouverture des contacts, a switching bar made of insulating material acting as support for the movable contacts of all the poles, said bar being mechanically coupled to the toggle to be moved by the mechanism between the closed position and the contacts open position,
    • une manette accouplée au mécanisme en traversant une lumière de passage dans la face avant du boîtier, a handle coupled to the mechanism through a passage of light in the front face of the housing,
    • le contact mobile de chaque pôle étant formé par un bras de contact articulé sur un axe solidaire du barreau, ledit contact mobile étant déplaçable par répulsion électrodynamique à partir d'une première position de repos vers une deuxième position active, et l'axe du contact mobile étant excentré par rapport à l'axe de rotation du barreau, the movable contact of each pole being formed by a hinged contact arm on a shaft integral with the bar, said movable contact being movable by electrodynamic repulsion from a first rest position to a second active position, and the contact axis being movable eccentrically relative to the axis of rotation of the bar,
      et des moyens élastiques comprenant un ressort logé dans un évidement du barreau pour assurer la pression de contact et pour ralentir la retombée du contact mobile vers la première position de repos, le ressort coopérant à glissement avec une surface d'appui du contact mobile pour modifier le point d'application de la force de pression P au cours de la course d'ouverture. and resilient means comprising a spring housed in a recess of the bar to provide the contact pressure and to slow the spin of the movable contact towards the first position, the spring cooperating with sliding with a bearing surface of the movable contact to change the point of application of the pressing force P during the opening stroke.
  • Dans ce premier type de disjoncteur limiteur (DE-U-84 28 351), l'apparition d'un courant de court-circuit provoque dans une première phase l'ouverture rapide, par répulsion électrodynamique, des contacts du pôle en défaut, et dans une deuxième phase le déclenchement du mécanisme piloté par les moyens de déclenchement. In this first type of limiting circuit breaker (DE-U-84 28 351), the occurrence of a short-circuit current causes in a first phase the rapid opening by electrodynamic repulsion, of the faulty pole contacts, and in a second phase the trigger mechanism controlled by the trigger means. La rotation du barreau de commutation pour l'ouverture définitive des contacts intervient uniquement durant la deuxième phase après déverrouillage de levier de déclenchement par le verrou. The rotation of the switching bar for final opening of the contacts occurs only during the second stage after initiation of release lever by the lock.
    Le barreau reste immobile pendant la première phase de répulsion électrodynamique. The bar remains stationary during the first phase of electrodynamic repulsion.
  • Seul, le bras de contact du pôle en défaut s'ouvre, les contacts des autres pôles restant fermés durant cette première phase. Only the faulty pole of the contact arm opens the contacts of the other poles remaining closed during this first phase. Il est essentiel que la rotation du barreau pour la confirmation de l'ouverture du disjoncteur intervienne avant la retombée du bras de contact vers la position de fermeture. It is essential that rotation of the bar for the confirmation of the opening of the circuit breaker takes place before energisation of the contact arm to the closed position. Le défaut de coordination entre les deux phases est dû principalement au maintien du barreau en position de fermeture durant la première phase de répulsion et peut provoquer des battements des contacts et une usure prématurée du disjoncteur. The lack of coordination between the two phases is due mainly to maintain the bar in the closed position during the first repulsion phase and can cause beats contacts and premature wear of the breaker.
  • Selon le document US-A-4.480.242, le contact mobile est soumis à une variation du couple de rappel du ressort de pression de contact, ledit couple étant croissant jusqu'à une position intermédiaire de la course d'ouverture, puis décroissant jusqu'à la position d'ouverture. According to US-A-4,480,242, the movable contact is subjected to a variation of the restoring torque of the contact pressure spring, said torque being increasing to an intermediate position of the opening travel, then decreasing until 'to the open position.
  • Le document FR-A 2553 930 de la demanderesse appartient à un deuxième type de disjoncteur limiteur ayant un mécanisme réversible, dans lequel l'axe de rotation du barreau coïncide avec le point d'articulation de chaque bras de contact. Document FR-A 2553 930 the applicant belongs to a second type of limiting circuit breaker having a reversible mechanism, wherein the axis of rotation of the bar coincides with the articulation point of each contact arm. Le ressort de traction est ancré entre le contact mobile et le barreau. The tension spring is anchored between the movable contact and the bar.
  • Le bras de contact de chaque pôle coopère avec le dispositif à genouillère pour entraîner à rotation le barreau de commutation dans le sens d'ouverture après l'entrée en action des moyens de répulsion électrodynamique du pôle en défaut de manière à autoriser la séparation des contacts de tous les pôles avant le déverrouillage du levier de déclenchement par le verrou. The contact arm of each pole cooperates with the toggle device to drive in rotation the switching bar in the opening direction after the entry into action of electrodynamic repulsion means of the pole in default so as to allow separation of the contacts all poles before unlocking of the trigger lever by the lock.
  • La réversibilité du mécanisme par rotation du barreau pendant la première phase d'ouverture électrodynamique accélère le temps de déclenchement pour confirmer l'ouverture définitive du disjoncteur. The reversibility of the mechanism by rotation of the bar during the first phase of electrodynamic opening accelerates the tripping time to confirm the definitive opening of the circuit breaker. La rotation du barreau avant l'intervention du déclencheur est rendue possible grâce à la déformation de la genouillère dont l'angle de décalage des biellettes est compris en position de fermeture entre 10 et 20 degrés. Rotation of the bar before the intervention of the release is made possible by the deformation of the toggle links of which the offset angle is in the closed position between 10 and 20 degrees.
  • L'invention se rapporte au premier type de disjoncteur limiteur, et a pour objet d'améliorer le système anti-retombée du contact mobile en fin de course de répulsion. The invention relates to the first type of limiting circuit breaker, and is intended to improve the anti-spin system of the movable contact at the end of repulsion travel.
  • Le disjoncteur selon l'invention est caractérisé en ce que: The circuit breaker according to the invention is characterized in that:
    le contact mobile est conformé en fourche ayant une âme commune de support de deux bras de contact, et une queue de maintien articulée sur l'axe et que le ressort en spirale est monté flottant dans l'évidement du barreau et comporte un organe palpeur coopérant avec deux fentes d'équilibrage de la surface d'appui solidaire de l'âme pour répartir la pression de contact sur les deux bras de contact. the movable contact is designed as a fork having a common core of the two contact arm support, and a hinged holding queue on the axis and that the spiral spring is mounted floating in the recess of the bar and comprises a feeler member cooperating with two bearing surface of the balancing slots integral with the core to distribute the contact pressure on the two contact arms.
  • Le ressort en spirale comporte deux enroulements hélicoïdaux de fil métallique, disposés coaxialement dans l'évidement en étant interconnectés dans la zone centrale par une liaison élastique saillante constituant ledit palpeur, et comprenant deux brins d'extrémités en appui contre une paroi du barreau. The spiral spring comprises two helicoidal windings of metallic wire arranged coaxially in the recess being interconnected in the central zone by a protruding flexible link forming said feeler, and comprising two supporting ends strands against a wall of the bar.
  • La répartition de la pression de contact avec le ressort en spirale s'effectue au moyen de deux fentes d'équilibrage prévues sur la surface d'appui de l'âme du contact mobile en fourche. The distribution of contact pressure with the spiral spring takes place by means of two balancing slots of the bearing surface of the core of the movable contact fork. Chaque fente est dotée de surfaces d'accrochage pour bloquer temporairement le contact mobile dans la deuxième position active. Each slot is provided with latching surfaces to temporarily block the movable contact in the second active position.
  • D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dossiers annexés, dans lesquels : Other advantages and features will become more apparent from the following description of an embodiment of the invention, given by way of example and shown in the accompanying records, in which:
    • la figure 1 est une vue schématique en coupe d'un disjoncteur selon l'invention, représenté en position de fermeture, Figure 1 is a schematic sectional view of a circuit breaker according to the invention, shown in the closed position,
    • la figure 2 est une vue en élévation du barreau de commutation équipé des contacts mobiles de l'ensemble des pôles, le barreau étant vu du côté des contacts fixes, Figure 2 is an elevational view of the switching bar with the movable contacts of all the poles, the bar being seen from the side of the fixed contacts,
    • la figure 3 représente le barreau de la figure 2, vu du côté opposé, 3 shows the rod of Figure 2, seen from the opposite side,
    • la figure 4 montre une vue en coupe du barreau selon la ligne 4-4 de la figure 3, le contact mobile se trouvant dans une première position de repos, Figure 4 shows a bar sectional view along line 4-4 of Figure 3, the movable contact being in a first rest position,
    • la figure 5 représente une vue partielle à l'échelle agrandie d'un pôle du barreau de la figure 3, 5 shows a partial view on an enlarged scale of a pole of the bar of Figure 3,
    • la figure 6 est une vue identique de la figure 4, le contact mobile se trouvant dans une deuxième position active après répulsion électrodynamique, Figure 6 is an identical view to Figure 4, the movable contact being in a second operative position after electrodynamic repulsion,
    • les figures 7 et 8 sont des vues identiques à la figure 1, respectivement au début et à la fin de la phase de répulsion électrodynamique, Figures 7 and 8 are similar views to Figure 1, respectively at the beginning and the end of the electrodynamic repulsion phase,
    • la figure 9 montre une vue identique à la figure 1 lors d'une ouverture manuelle du disjoncteur. 9 shows a view identical to Figure 1 during a manual opening of the circuit breaker.
  • Sur la figure 1, un disjoncteur multipolaire 10 à boîtier 12 isolant moulé, comporte un module de coupure 14 par pôle, formé par une ampoule 16 monobloc en matière plastique moulée, et ayant une forme de parallélépipède rectangle. In Figure 1, a multipole circuit breaker 10 to 12 molded insulating housing comprises a cut-off module 14 per pole, formed by a funnel 16 integrally molded plastic, and having a rectangular parallelepiped shape. L'ampoule 16 comprend une face avant 18 ayant un orifice 20 de passage du contact mobile 22, et le module de coupure 14 comprend un dispositif à répulsion électrodynamique des contacts. The bulb 16 includes a front face 18 having an orifice 20 for passage of the movable contact 22 and the switching module 14 comprises an electrodynamic repulsion device contacts.
  • A l'intérieur de l'ampoule 16, se trouvent deux contacts fixes 24, 26 reliés respectivement par des conducteurs 28, 30 de liaison à une première plage 32 d'une borne de raccordement 34, et à une deuxième plage 36 destinée à être connectée par une vis 38 à une troisième plage de contact 40 d'un dispositif de déclenchement 42. Within the bulb 16, are two fixed contacts 24, 26 respectively connected by conductors 28, 30 connecting to a first range 32 a connecting terminal 34, and a second range 36 to be connected by a screw 38 to a third contact pad 40 of a trigger device 42.
  • Le dispositif de déclenchement 42 comporte un déclencheur magnétothermique 44 équipé à l'opposé de la plage 40, d'une quatrième plage de contact 46 faisant partie de l'autre borne 48 de raccordement du pôle. The triggering device 42 comprises a magnetic trip unit 44 equipped on the opposite side of the beach 40, a fourth contact pad 46 forming part of the other terminal 48 of the connecting pole. Le déclencheur 44 est inséré électriquement en série dans le pôle avec les contacts 22, 24, 26 du module de coupure 14. The trigger 44 is electrically inserted in series in the pole with the contacts 22, 24, 26 of the switching module 14.
  • Le dispositif de déclenchement 42 comprend de plus une barre de déclenchement 50 montée à rotation limitée entre une position armée et une position déclenchée en fonction de la position de l'organe d'actionnement du déclencheur 44, par exemple la bilame 52 ou la palette 54. La barre 50 rotative est déplacée vers la position déclenchée dès que le courant circulant dans le pôle dépasse un seuil prédéterminé. The triggering device 42 further comprises a rotatably mounted trip bar 50 limited between an armed position and a released position depending on the position of the actuating member of the shutter 44, for example the bimetal 52 or the pallet 54 . the rotary bar 50 is moved to the tripped position when the current flowing in the pole exceeds a predetermined threshold. La barre de déclenchement 50 coopère d'autre part avec un verrou 56 d'accrochage d'un mécanisme 58 de commande à genouillère 60 et à manette 62. The trip bar 50 cooperates on the other hand with a bolt 56 for fastening a control mechanism 58 of the toggle 60 and handle 62.
  • Le mécanisme 58 est commun à l'ensemble des pôles, et est logé à l'intérieur du boîtier 12, seule la manette 62 étant accessible de l'extérieur en traversant une lumière 64 ménagée dans la face avant du boîtier 12, pour la commande manuelle du disjoncteur 10. The mechanism 58 is common to all the poles and is housed inside the case 12, only the handle 62 being accessible from outside through an aperture 64 formed in the front of the housing 12 for controlling manual circuit breaker 10.
  • La biellette inférieure 66 de la genouillère 60 est accouplée à une protubérance 68 d'un barreau 70 de commutation servant de support aux contacts mobiles 22 de tous les pôles. The lower link 66 of the toggle 60 is coupled to a protrusion 68 of a bar 70 serving as switching support for the movable contacts 22 of all poles. Le barreau 70 de commutation est réalisé en matériau isolant et s'étend parallèlement à la barre de déclenchement 50 dans la direction transversale des pôles. The bar 70 of switch is made of insulating material and extends parallel to the trip bar 50 in the transverse direction of the poles.
  • Une action de déverrouillage de la barre de déclenchement 50 sur le verrou 56 libère le mécanisme 58, lequel se désarme sous l'action de détente d'un ressort 72 d'embiellage, entraînant le déplacement par pivotement de la genouillère 60, et la rotation du barreau 70 vers la position d'ouverture des contacts 22, 24, 26 de tous les pôles. A trip bar unlocking action 50 of the latch 56 releases the mechanism 58, which will be disarmed by the action of expansion of a spring linkage 72, causing pivotal movement of the toggle joint 60, and rotation of the bar 70 to the contact open position 22, 24, 26 of all poles. L'ordre de déverrouillage du verrou 56 peut provenir du déclencheur 44 magnétothermique, ou d'un déclencheur auxiliaire, notamment à manque de tension MN, à émission de courant MX, différentiel, etc... The lock unlocking command 56 may come from the magnetothermal trip unit 44, or an auxiliary trip device, in particular to lack of voltage MN, MX shunt, differential, etc ...
  • Chaque module de coupure 14 renferme deux chambres d'extinction d'arc, dont une seule 74 est représentée sur la figure 1, chaque chambre se trouvant en communication avec une ouverture ou canal 76 d'échappement des gaz de coupure vers l'extérieur de l'ampoule 16. Chaque chambre d'extinction d'arc 74 est formée par un empilage des tôles de désionisation à encoches en V orientées vers le contact mobile 22. Each switching module 14 includes two arc extinguishing chambers, of which only one 74 is shown in Figure 1, each chamber being in communication with an aperture or channel 76 for outlet of the breaking gases to the outside the bulb 16. Each arc extinguishing chamber 74 is formed by a stack of deionizing plates of V-notched oriented movable contact 22.
  • Sur les figures 2 et 3, le barreau de commutation 70 d'un disjoncteur tripolaire est équipé de trois contacts mobiles 22 identiques, répartis à intervalles réguliers le long de la direction transversale du barreau 70. Chaque contact mobile 22 présente une forme de fourche à deux bras de contact 22a, 22b, parallèles, coopérant en position de fermeture avec les deux contacts fixes 24, 26. Figures 2 and 3, the switching bar 70 of a three-pole circuit breaker is equipped with three movable contacts 22 identical, distributed at regular intervals along the transverse direction of the bar 70. Each movable contact 22 has a fork shape to two arm contact 22a, 22b, parallel, cooperating in the closed position with the two stationary contacts 24, 26.
  • L'intérieur de l'ampoule 16 de chaque module de coupure 14 est subdivisé par une paroi isolante intermédiaire en deux compartiments adjacents, dans lesquels pénètrent les deux bras 22a, 22b du contact mobile 22 en fourche à travers l'orifice 2o, le contact mobile 22 se trouvant positionné à cheval sur la paroi lors de son pivotement entre les positions de fermeture et d'ouverture. The interior of the bulb 16 of each breaking module 14 is subdivided by an intermediate insulating wall into two adjacent compartments, in which penetrate the two arms 22a, 22b of the movable contact 22 through the fork 2o orifice, the contact mobile 22 being positioned astride the wall when pivoted between the closed and open positions. Le barreau 70 est guidé en rotation par des paliers (non représentés) prévus dans l'ampoule 16 des différents modules de coupure 14. The bar 70 is guided in rotation by bearings (not shown) provided in the bulb 16 of the different breaking modules 14.
  • En référence aux figures 4 à 6, chaque contact mobile 22 en fourche comporte une base 80 commune de support des deux bras de contact 22a, 22b verticaux, de manière à former un U renversé. Referring to Figures 4 to 6, each movable contact 22 in fork comprises a base 80 common support of the two contact arms 22a, 22b vertical, so as to form an inverted U. La base 80 rectiligne s'étend dans la direction transversale du barreau 70, et est équipée dans la zone centrale d'une queue 82 de maintien dont l'extrémité libre est articulée sur un axe 84 horizontal solidaire du barreau 70. La queue 82 est située dans le plan médian de symétrie avec une orientation inverse par rapport aux deux bras de contact 22a, 22b élémentaires. The base 80 extends straight in the transverse direction of the bar 70, and is fitted in the central area of ​​a tail 82 for holding the free end is hinged on a pin 84 horizontally secured to the bar 70. The tail 82 is situated in the median plane of symmetry with a reverse orientation relative to the two contact arms 22a, 22b elementary.
  • L'axe 84 de chaque contact mobile 22 est logé avec jeu dans deux paliers 86, 88 alignés ménagés sur la face supérieure du barreau 70. L'axe 84 de contact est parallèle, et excentré par rapport à l'axe de rotation du barreau 70. The axis 84 of each movable contact 22 is housed with clearance in two bearings 86, 88 arranged aligned on the upper face of the bar 70. The axis 84 of contact is parallel and eccentric to the axis of rotation of the bar 70.
  • Chaque contact mobile 22 coopère avec un ressort 90 en spirale situé dans un évidement 92 délimité par un cadre 93 rectangulaire du barreau 70 pour assurer la pression de contact en position de fermeture. Each movable contact 22 cooperates with a spring 90 spirally located in a recess 92 delimited by a rectangular frame 93 of the bar 70 to ensure the contact pressure in the closed position. Le ressort 90 comprend deux enroulements hélicoïdaux 90a, 90b coaxiaux réalisés en fil métallique et interconnectés par une liaison élastique 94 intermédiaire, laquelle est traversée par la queue 82 en prenant appui sur la base 80 du contact mobile 22. La liaison élastique 94 du ressort 90 comprend deux brins de fil métallique, conformés selon une demi-spire jouant le rôle de palpeur, et ayant une partie saillante 94a incurvée vers le haut. The spring 90 comprises two coil windings 90a, 90b made of wire coaxial and interconnected by an elastic intermediate link 94, which is crossed by the tail 82 bearing against the base 80 of the movable contact 22. The elastic connection 94 of the spring 90 comprises two strands of metal wire, shaped as a half-turn acting as a probe and having a projecting portion 94a curved upwards.
  • Le palpeur de la liaison élastique 94 est positionné dans deux fentes 96, 98 en V prévues sur la surface d'appui 80a de la base 80 pour assurer l'équilibrage de la pression de contact en position de fermeture des contacts 22, 24, 26. Les deux fentes 96, 98 sont symétriques par rapport au plan médian passant par la queue 82, et les deux brins d'extrémités100, 102 des deux enroulements 90a, 90b sont plaqués en permanence contre la face supérieure interne du cadre 93. The probe of the resilient connection 94 is positioned in two slots 96, 98 in V provided on the bearing surface 80a of the base 80 to ensure the balancing of the contact pressure in the contact closed position 22, 24, 26 . the two slots 96, 98 are symmetrical with respect to the median plane passing through the shank 82, and the two strands of extrémités100, 102 of the two windings 90a, 90b are pressed constantly against the inner upper face of the frame 93.
  • Le ressort 90 est monté flottant dans l'évidement 92 par rapport à l'axe du barreau 70 rotatif. The spring 90 is mounted floating in the recess 92 relative to the axis of the bar 70 rotatable. La coopération du ressort 90 avec l'âme 80 du contact mobile 22 en fourche constitue un dispositif de maintien temporaire du contact en fin de course de répulsion électrodynamique. The cooperation of the spring 90 with the core 80 of the movable contact 22 constitutes a fork device for temporarily maintaining the contact at the end of electrodynamic repulsion travel.
  • Le fonctionnement d'un pôle du disjoncteur 10 à répulsion électrodynamique est le suivant : The operation of a circuit breaker pole 10 to electrodynamic repulsion is:
  • En position de fermeture représentée sur la figure 1, le contact mobile 22 en fourche se trouve en appui stable contre les contacts fixes 24, 26 correspondants. In the closed position shown in Figure 1, the movable contact 22 in fork is in stable abutment against the fixed contacts 24, 26 corresponding. La réaction symétrique des deux brins 100, 102 du ressort 90 en spirale sur le cadre 93 du barreau 70 assure l'équilibrage de la pression de contact sur les deux bras 90a, 90b grâce à l'action de poussée répartie de la liaison élastique 94 ou palpeur sur l'âme 80. La figure 4 montre la force de pression P qui s'exerce sur le contact mobile 22 lorsque ce dernier se trouve dans une première position de repos. The symmetrical response of the two strands 100, 102 of the spiral spring 90 on the frame 93 of the bar 70 ensures the balancing of the contact pressure on the two arms 90a, 90b due to the pushing action of the distributed elastic connection 94 probe or to the core 80. Figure 4 shows the pressure force P exerted on the movable contact 22 when the latter is in a first position. La ligne d'action de la force P est sensiblement perpendiculaire à la liaison électrique 94 du ressort 90, et sollicite le contact mobile 22 dans le sens inverse des aiguilles d'une montre pour exercer la pression de contact. The line of action of the force P is substantially perpendicular to the electrical connection 94 of the spring 90, and biases the movable contact 22 in the opposite direction counterclockwise to exert the contact pressure.
    La manette 62 du mécanisme 58 se trouve dans la position de fermeture, en butée contre l'extrémité gauche de la lumière 64. Le mécanisme 58 à ressort 72 est armé, et le déclencheur 44 est inactif. The handle 62 of the mechanism 58 is in the closed position, into abutment against the left end of the light 64. The mechanism 58 and spring 72 is armed, and the shutter button 44 is inactive. Le point d'application 103 de la force P se trouve sur le bord de l'âme 80. The application point 103 of the force P from the edge of the core 80.
  • Sur la figure 7, l'apparition d'un courant de court-circuit dans le pôle provoque un effet de répulsion électrodynamique des contacts, avec un déplacement rapide du contact mobile 22, lequel pivote autour de son axe 84, dans le sens des aiguilles d'une montre. In Figure 7, the occurrence of a short-circuit current in the pole causes an electrodynamic repulsion effect of the contacts, with a quick movement of the movable contact 22 which pivots about its axis 84 in the clockwise a watch. La répulsion électrodynamique assure une ouverture brusque des contacts du pôle en défaut, avant l'intervention mécanique du mécanisme 58 de commande. The electrodynamic repulsion ensures sudden opening of faulty pole contacts before the mechanical intervention of the 58 control mechanism. Le ressort 72 et la genouillère 60 restent immobiles, ainsi que le barreau de commutation 70, dont la position correspond à celle de la figure 1. L'arc reste ancré entre le contact mobile 22 et la corne d'arc fixe 104, et est propulsé en direction des tôles de désionisation de la chambre d'extinction 74. The spring 72 and the toggle 60 remain immobile and the switching bar 70, whose position corresponds to that of Figure 1. The arc remains anchored between the movable contact 22 and the stationary arcing horn 104, and is propelled towards the deionization plates of the arc extinguishing chamber 74.
  • En fin de course d'ouverture sur répulstion (figure 8), le contact mobile 22 est ouvert au maximum, et se trouve en butée contre la paroi de l'ampoule 16. L'arc est refroidi par les tôles de la chambre 74, et le déclencheur 44 commence à piloter la phase de déclenchement du mécanisme 58 (voir flèches). At the end of opening travel on répulstion (Figure 8), the movable contact 22 is fully open, and is in abutment against the wall of the bulb 16. The arc is cooled by the plate of the chamber 74, and the shutter 44 starts to control the mechanism tripping phase 58 (see arrows).
  • Après déclenchement du mécanisme 58 (non représenté sur les figures), le verrou 56 libère la genouillère 60 entraînant la détente du ressort 72, et la rotation du barreau 70 dans le sens des aiguilles d'une montre, de manière à confirmer l'ouverture du contact mobile 22. After tripping of the mechanism 58 (not shown in the figures), the latch 56 releases the toggle joint 60 resulting in the release of the spring 72, and rotation of the bar 70 in the direction of clockwise, so as to confirm the opening the movable contact 22.
  • Pendant les phases de répulsion électrodynamique représentées sur les figures 7 et 8, il est impératif que le contact mobile 22 ne se referme pas avant l'intervention du barreau 70 suite au déclenchement du mécanisme 58. Le retard de retombée du contact mobile 22 est obtenu grâce au déplacement du point d'application 103 de la force P qui s'exerce sur l'âme 80 lors de la répulsion. During the electrodynamic repulsion phases represented in Figures 7 and 8, it is imperative that the movable contact 22 does not close before the intervention of the bar 70 due to the tripping of the mechanism 58. The dropout delay of the movable contact 22 is obtained through displacement of the application point 103 of the force P exerted on the core 80 when repulsion.
  • Dans la position de répulsion de la figure 6, le glissement de la liaison élastique 94 vers l'intérieur des fentes d'équilibrage 96, 98 modifie l'emplacement du point d'application 103 de la force P exercée par le ressort 90. La ligne d'action de la force P passe au voisinage de l'axe 84 de pivotement du contact mobile 22, ce qui diminue notablement le couple de rappel vers la position de fermeture. In the repulsion position of Figure 6, the sliding of the elastic connection 94 inwardly balancing slots 96, 98 changes the location of the application point 103 of the force P exerted by the spring 90. The line of action of the force P passes close to the axis 84 of pivoting of the movable contact 22, which significantly reduces the restoring torque to the closed position. Cette diminution du couple de rappel permet de retarder la retombée du contact mobile 22 avant l'intervention du barreau 70. This decrease in the return torque can delay the fallout of the moving contact 22 before the intervention of the bar 70.
  • Les fentes 96, 98 comportent avantageusement des surfaces d'accrochage conformées pour bloquer temporairement le contact mobile 22 dans la position de répulsion maximum. The slots 96, 98 advantageously comprise gripping surfaces shaped to temporarily block the movable contact 22 in the maximum repulsion position.
  • La figure 9 montre une phase d'ouverture manuelle du disjoncteur 10 par l'actionnement de la manette 62 dans le sens de la flèche. 9 shows a manual opening phase of the circuit breaker 10 by actuation of the handle 62 in the direction of the arrow. Le mécanisme 58 reste armé, et la rotation du barreau 70 provoque le déplacement du contact mobile 22 vers la position d'ouverture dès que la manette 62 a dépassé la position intermédiaire du point mort ouverture. The mechanism 58 remains energized, and the rotation of the bar 70 causes movement of the movable contact 22 to the open position as soon as the handle 62 has passed the intermediate position of the opening dead point.
  • Il n'y a pas de répulsion électrodynamique des contacts, et le point d'application 103 de la force P du ressort 90 correspond à celui de la figure 4. There is no electrodynamic repulsion of the contacts, and the application point 103 of the force P of the spring 90 corresponds to that of Figure 4.

Claims (5)

  1. A current-limiting circuit breaker with moulded insulating case (12), housing :
    - a current interrupting device having per pole separable contact elements (22, 24, 26) by electrodynamic repulsion, and at least one arc extinguishing chamber (74),
    - an operating mechanism (58) with a toggle (60) associated with a connecting spring (72), and with a trip device (42),
    - a switching bar (70) made of insulating material acting as support for the movable contacts (22) of all the poles, said bar being mechanically coupled to the toggle (60) to be moved by the mechanism (58) between the closed position and the open position of the contacts,
    - a handle (62) coupled to the mechanism (58) and passing through an aperture (64) in the front panel of the case (12),
    - the movable contact (22) of each pole being formed by a contact arm articulated on a spindle (84) securedly united to the bar (70), said movable contact (22) being able to be moved by electrodynamic repulsion from a first rest position to a second active position, and the spindle (84) of the movable contact (22) being eccentric with respect to the rotation axis of the bar (70),
    - and flexible means comprising a spring (90) housed in a recess (92) of the bar (70) to provide the contact pressure and to slow down the drop-back of the movable contact (22) to the first rest position, the spring (90) cooperating with sliding with a bearing surface (80a) of the movable contact (22) to modify the application point (103) of the pressure force P in the course of the opening travel,
    characterized in that
    - the movable contact (22) is shaped as a fork having a common body (80) supporting two contact arms (22a, 22b), and a securing shank (82) articulated on the spindle (84) and that the spirally-wound spring (90) is mounted floating in the recess (92) of the bar (70) and comprises a feeler part (94) cooperating with two balancing slots (96, 98) of the bearing surface (80a) securedly united to the body (80) to distribute the contact pressure on the two contact arms (22a, 22b).
  2. The circuit breaker according to claim 1, characterized in that the spirally-wound spring (90) comprises two helicoidal windings (90a, 90b) made of metallic wire arranged coaxially in the recess (92) and interconnected in the central zone by a protruding flexible link forming said feeler (94), and comprising two end strands (100, 102) pressing against a wall of the bar (70).
  3. The circuit breaker according to claim 2, characterized in that the flexible link of the feeler (94) comprises a half-turn made of metallic wire having an upwardly-curved protruding part (94a).
  4. The circuit breaker according to claim 2 or 3, characterized in that the two windings (90a, 90b) of the spring (90) and the two contact arms (22a, 22b) of the fork-shaped contact (22) are disposed symmetrically in each pole with respect to the mid-plane passing through the securing shank (82).
  5. The circuit breaker according to one of the claims 1 to 4, characterized in that each slot (96, 98) is provided with latching surfaces to temporarily block the movable contact (22) in the second active position.
EP19940420094 1993-04-07 1994-03-22 Multipole current limiting circuit breaker with electrodynamic repulsion Expired - Lifetime EP0619593B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9304298 1993-04-07
FR9304298A FR2703824B1 (en) 1993-04-07 1993-04-07 Multipole circuit breaker limiter electrodynamic repulsion.

Publications (2)

Publication Number Publication Date
EP0619593A1 EP0619593A1 (en) 1994-10-12
EP0619593B1 true EP0619593B1 (en) 1997-04-16

Family

ID=9445985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940420094 Expired - Lifetime EP0619593B1 (en) 1993-04-07 1994-03-22 Multipole current limiting circuit breaker with electrodynamic repulsion

Country Status (6)

Country Link
US (1) US5469121A (en)
EP (1) EP0619593B1 (en)
JP (1) JP3509923B2 (en)
DE (2) DE69402597D1 (en)
ES (1) ES2102171T3 (en)
FR (1) FR2703824B1 (en)

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Also Published As

Publication number Publication date
EP0619593A1 (en) 1994-10-12
JPH06325678A (en) 1994-11-25
DE69402597D1 (en) 1997-05-22
ES2102171T3 (en) 1997-07-16
FR2703824B1 (en) 1995-05-12
FR2703824A1 (en) 1994-10-14
DE69402597T2 (en) 1997-10-02
JP3509923B2 (en) 2004-03-22
US5469121A (en) 1995-11-21

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