EP0619592A1 - Electric circuit breaker with electrodynamic repulsion of the contacts and double extinguishing chambers - Google Patents

Electric circuit breaker with electrodynamic repulsion of the contacts and double extinguishing chambers Download PDF

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Publication number
EP0619592A1
EP0619592A1 EP94420093A EP94420093A EP0619592A1 EP 0619592 A1 EP0619592 A1 EP 0619592A1 EP 94420093 A EP94420093 A EP 94420093A EP 94420093 A EP94420093 A EP 94420093A EP 0619592 A1 EP0619592 A1 EP 0619592A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
end plate
arc extinguishing
extinguishing chambers
arc
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.)
Granted
Application number
EP94420093A
Other languages
German (de)
French (fr)
Other versions
EP0619592B1 (en
Inventor
Jean-Luc Payet-Burin
Pierre Batteux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric SE
Original Assignee
Merlin Gerin SA
Schneider Electric SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Merlin Gerin SA, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0619592A1 publication Critical patent/EP0619592A1/en
Application granted granted Critical
Publication of EP0619592B1 publication Critical patent/EP0619592B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts 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
    • H01H1/226—Contacts 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

Definitions

  • Such a device is described in documents DE-A 1180453 and FR-A 2495 826. These are single-pole miniature circuit breakers using a movable fork contact, and the placing in series of two extinguishing chambers to increase the power of device shutdown.
  • the contact system is not designed to generate electrodynamic repulsion, and the percussion action of the magnetic trip unit is generally used to accelerate the opening of the contacts in the event of a short-circuit current.
  • the invention relates to a multipole circuit breaker with common insulating housing and with electrodynamic repulsion for rapid opening of the contacts.
  • the electrodynamic repulsion effect results from the passage of a short-circuit current through the contacts shaped according to a current loop. This repulsion results in a separation of the contacts before the intervention of the control mechanism.
  • the speed of movement of the movable contact depends both on the shape of the current loop, and on the mass of the movable contact arm. Rapid movement therefore requires either a light movable contact or a complex and expensive copper circuit.
  • the choice of a light movable contact nevertheless poses the problem of overheating due to the passage of the arc current in the movable contact.
  • a first object of the invention consists in improving the breaking of a multipole circuit breaker with opening by electrodynamic repulsion and with double breaking chamber per pole.
  • a second object of the invention consists in making a multipole circuit breaker having a cut-off bulb per pole, with the insertion of various types of arc extinguishing chambers according to the desired breaking capacity.
  • the circuit breaker according to the invention is characterized in that the two arc extinguishing chambers comprise a common end sheet, of conductive material, disposed opposite the fixed contacts, and serving both as a shunting of the movable contact at the end of the opening stroke after switching of the arc on said end plate, and of electrical coupling device in series of the two arc extinguishing chambers, that each breaking module is formed by a parallelepipedal plastic bulb, containing the two fixed contacts, the two arc extinguishing chambers, the common end plate, and a pair of connection pads, which the intermediate wall subdivides the interior of the 'bulb in two adjacent compartments, open on the bottom side, and that the movable contact enters the two compartments through a through hole located opposite the bottom.
  • Each breaking module is formed by a one-piece rectangular plastic bulb, containing the two fixed contacts, the two arc extinguishing chambers, the common end plate, and a pair of connection pads.
  • the interior of the bulb is subdivided into two adjacent compartments by an insulating wall, and each extinguishing chamber is inserted into the bulb from the bottom, bearing on the edges of the corresponding compartment.
  • the common end plate extends over the entire width of the bulb.
  • a pole of a multipole circuit breaker 10 with molded insulating housing 12 comprises a single-pole breaking module 14, formed by a one-piece bulb 16 of molded plastic, and having the shape of a rectangular parallelepiped.
  • the bulb 16 comprises a bottom 18, a front face 20 having an orifice 22 for the passage of the movable contact 24, two large parallel lateral faces 26, 28 and two small parallel faces 30, 32 for connection.
  • the breaking module 14 is of the type with electrodynamic repulsion of the contacts.
  • the triggering device comprises a magnetothermal trigger module 46, equipped opposite the pad 44, with a fourth contact pad 48 forming part of the other terminal 50 for connecting the pole.
  • the trip module 46 is inserted in series in the pole with the contacts 34, 36, 24 of the cut-off module 14.
  • the current returns through the input terminal 40, and flows successively in the range 38, the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, the pads 42, 44, the trip unit 46, the contact pad 48 and the output terminal 50.
  • the triggering device further comprises a trigger bar 52 mounted with limited rotation between an armed position and a triggered position as a function of the position of the actuator of the trigger 46, for example the bimetallic strip 54 or the pallet 56.
  • the rotary bar 52 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold.
  • Trigger bar 52 cooperates on the other hand, with a latch 58 for attaching a control mechanism 60 to toggle joint 62 and to lever 64.
  • the mechanism 60 is common to all of the poles, and is housed in the housing 12 between a pair of metal support plates 66, only the handle 64 being accessible from the outside by passing through a passageway of the housing 12, for circuit breaker control 10.
  • the lower link 80 of the toggle joint 62 is coupled to a protuberance 81 of a switching bar 82 serving to support the movable contacts 24 of all the poles.
  • the switching bar 82 is made of insulating material and extends parallel to the trigger bar 52 in the transverse direction of the poles.
  • the unlocking order of the lock 58 can come from the magnetothermal trigger module 46, or from an auxiliary trigger, in particular with a lack of voltage MN, with emission of current MX, differential, etc.
  • Each cut-off module 14 contains two arc extinguishing chambers 84, 86, being in communication with an opening or channel 88 for exhaust of the cut-off gases towards the outside of the bulb 16.
  • Each extinguishing chamber arc 84, 86 is formed by a stack of deionization plates with V-notches oriented towards the movable contact 24.
  • the switching bar 82 shown in detail in FIG. 4, is equipped with three movable contacts 24, distributed at regular intervals along the transverse direction of the bar 82.
  • Each movable contact 24 has the form of a fork cooperating in the closed position with the two fixed contacts 34, 36.
  • each bulb 16 comprises a pair of U-shaped notches 90, oriented on the side of the front face 20, and serving as bearings for the switching bar 82.
  • each breaking module 14 The interior of the bulb 16 of each breaking module 14 is subdivided by an insulating wall 92 intermediate into two adjacent compartments 94, 96 open on the bottom side 18.
  • the movable fork contact 24 enters the two compartments 94, 96 through the orifice 22 located opposite the bottom 18, and is positioned astride the wall 92.
  • the fixed contact 34 and the arc extinguishing chamber 84 are housed in the first compartment 94.
  • the other fixed contact 36 and the arc extinguishing chamber 96 are in the second compartment 96.
  • Each fixed contact 34, 36 is extended in the compartment 94, 96 associated by a metal electrode 98, 100 serving as an arc horn, which is arranged opposite the connecting conductor 35, 37.
  • the two electrodes 98, 100 are rectilinear and extend parallel to each other, being separated by the insulating wall 92.
  • the two arc extinguishing chambers 84, 86 have a common end plate 102, which extends over the entire width of the bulb 16 on the side of the exhaust opening 88.
  • the insulating wall 92 s 'extends in the median plane of the bulb 16 and is perpendicular to the metal end plate 102 without passing through it.
  • the end sheet 102 has two notches 104, 106 in a V aligned respectively with the notches of the elementary sheets of the chambers 84, 86.
  • the two arc extinguishing chambers 84, 86 with deionization sheets, are surrounded by the common end sheet 102, and the two electrodes 98, 100.
  • the two connecting conductors 35, 37 are arranged at the outside of the bulb 16 in housings provided in large lateral faces 26, 28.
  • the direction of flow of the nominal current is represented by the arrows in FIG. 5.
  • the current flows through the conductor of link 35 to the fixed contact 34, then circulates in the movable contact 24 in a fork passing from the first compartment 94 to the second compartment 96. It emerges from the bulb 16 towards the second connection pad 42 via the fixed contact 36 , and the connecting conductor 37.
  • the nominal current flows neither in the electrodes 98, 100, nor in the end sheet 102.
  • the arc current successively travels through the electrode 98 and the first extinguishing chamber 84 in the first compartment 94, then crosses the end sheet 102 in the transverse direction of the bulb 16 to circulate in the second compartment 96 through the extinguishing chamber 86, the electrode 100 and the fixed contact 36.
  • the two arc extinguishing chambers 84, 86 are electrically connected in series by the passage of the current arc in the sheet 102. This results in effective cooling of the arc and rapid extinction of the latter.
  • Arc guide cheeks are integrated into the side walls, delimiting the two compartments 94, 96 juxtaposed with the bulb 16. These cheeks are made of insulating material resistant to arc action, this material being different from that used for the rest of the one-piece bulb 16.
  • the arc extinguishing chambers 84, 86 are supported on flanges 110 of the bulb 16, after insertion through the bottom 18. These chambers 84, 86 comprise several interchangeable types as a function of the desired breaking capacity.
  • the end sheet 102 can be pierced with holes 112 (see FIG. 6), making the outlet of the chambers 84, 86 communicate with the opening 88 for the exhaust of the cutting gases.

Abstract

The two arc extinction chambers (84), (86) include a common end plate (102), of conducting material, arranged opposite fixed contacts (34), (36), and serving both as an element for shunting the moving contact (24) at the end of opening travel after switching of the arc onto the said end plate (102), and as an element for series electrical coupling of the two arc extinction chambers (84), (86). Application: Multi-pole circuit breaker with electrodynamic repulsion. <IMAGE>

Description

L'invention est relative à un disjoncteur électrique à boîtier isolant moulé ayant un module de coupure comprenant par pôle:

  • deux chambres d'extinction d'arc, disposées côte-à-côte, et ayant chacune un empilage de tôles métalliques de désionisation,
  • une paroi intermédiaire réalisée en matériau isolant, et intercalée entre les deux chambres d'extinction d'arc,
  • une paire de contacts fixes coopérant avec un contact mobile en forme de fourche positionnée à cheval sur ladite paroi,
  • et un mécanisme de commande du contact mobile pour ouvrir et fermer le disjoncteur.
The invention relates to an electrical circuit breaker with molded insulating housing having a breaking module comprising per pole:
  • two arc extinguishing chambers, placed side by side, and each having a stack of metal sheets for deionization,
  • an intermediate wall made of insulating material, and interposed between the two arc extinguishing chambers,
  • a pair of fixed contacts cooperating with a movable fork-shaped contact positioned astride said wall,
  • and a movable contact control mechanism for opening and closing the circuit breaker.

Un tel dispositif est décrit dans les documents DE-A 1180453 et FR-A 2495 826. Il s'agit de disjoncteurs miniatures unipolaires utilisant un contact mobile en fourche, et la mise en série de deux chambres d'extinction pour accroître le pouvoir de coupure de l'appareil. Le système de contacts n'est pas conçu pour engendrer une répulsion électrodynamique, et on utilise généralement l'action de percussion du déclencheur magnétique pour accélérer l'ouverture des contacts en cas d'apparition d'un courant de court-circuit.Such a device is described in documents DE-A 1180453 and FR-A 2495 826. These are single-pole miniature circuit breakers using a movable fork contact, and the placing in series of two extinguishing chambers to increase the power of device shutdown. The contact system is not designed to generate electrodynamic repulsion, and the percussion action of the magnetic trip unit is generally used to accelerate the opening of the contacts in the event of a short-circuit current.

L'invention concerne un disjoncteur multipolaire à boîtier isolant commun, et à répulsion électrodynamique pour l'ouverture rapide des contacts. L'effet de répulsion électrodynamique résulte du passage d'un courant de court-circuit dans les contacts conformés selon une boucle de courant. Cette répulsion se traduit par une séparation des contacts avant l'intervention du mécanisme de commande. La vitesse de déplacement du contact mobile dépend à la fois de la forme de la boucle de courant, et de la masse du bras de contact mobile. Un déplacement rapide impose de ce fait, soit un contact mobile léger, soit un circuit de cuivre complexe et onéreux. Le choix d'un contact mobile léger pose néanmoins le problème de suréchauffement dû au passage du courant d'arc dans le contact mobile.The invention relates to a multipole circuit breaker with common insulating housing and with electrodynamic repulsion for rapid opening of the contacts. The electrodynamic repulsion effect results from the passage of a short-circuit current through the contacts shaped according to a current loop. This repulsion results in a separation of the contacts before the intervention of the control mechanism. The speed of movement of the movable contact depends both on the shape of the current loop, and on the mass of the movable contact arm. Rapid movement therefore requires either a light movable contact or a complex and expensive copper circuit. The choice of a light movable contact nevertheless poses the problem of overheating due to the passage of the arc current in the movable contact.

Un premier objet de l'invention consiste à améliorer la coupure d'un disjoncteur multipolaire à ouverture par répulsion électrodynamique et à chambre de coupure double par pôle.A first object of the invention consists in improving the breaking of a multipole circuit breaker with opening by electrodynamic repulsion and with double breaking chamber per pole.

Un deuxième objet de l'invention consiste à réaliser un disjoncteur multipolaire ayant une ampoule de coupure par pôle, avec insertion de divers types de chambres d'extinction d'arc selon le pouvoir de coupure souhaité.A second object of the invention consists in making a multipole circuit breaker having a cut-off bulb per pole, with the insertion of various types of arc extinguishing chambers according to the desired breaking capacity.

Le disjoncteur selon l'invention est caractérisé en ce que les deux chambres d'extinction d'arc comportent une tôle d'extrémité commune, en matériau conducteur, disposée à l'opposé des contacts fixes, et servant à la fois d'organe de shuntage du contact mobile en fin de course d'ouverture après commutation de l'arc sur ladite tôle d'extrémité, et d'organe de couplage électrique en série des deux chambres d'extinction d'arc, que chaque module de coupure est formé par une ampoule monobloc parallélépipèdique en matière plastique, renfermant les deux contacts fixes, les deux chambres d'extinction d'arc, la tôle d'extrémité commune, et une paire de plages de raccordement, que la paroi intermédiaire subdivise l'intérieur de l'ampoule en deux compartiments adjacents, ouverts du côté du fond, et que le contact mobile pénètre dans les deux compartiments par un orifice de passage situé à l'opposé du fond .The circuit breaker according to the invention is characterized in that the two arc extinguishing chambers comprise a common end sheet, of conductive material, disposed opposite the fixed contacts, and serving both as a shunting of the movable contact at the end of the opening stroke after switching of the arc on said end plate, and of electrical coupling device in series of the two arc extinguishing chambers, that each breaking module is formed by a parallelepipedal plastic bulb, containing the two fixed contacts, the two arc extinguishing chambers, the common end plate, and a pair of connection pads, which the intermediate wall subdivides the interior of the 'bulb in two adjacent compartments, open on the bottom side, and that the movable contact enters the two compartments through a through hole located opposite the bottom.

La mise hors courant du contact mobile est automatique dès que l'arc commute sur l'électrode d'extrémité. La faible masse du contact mobile permet d'accélérer le shuntage du contact mobile. Chaque module de coupure est formé par une ampoule monobloc parallélépipèdique en matière plastique, renfermant les deux contacts fixes, les deux chambres d'extinction d'arc, la tôle d'extrémité commune, et une paire de plages de raccordement. L'intérieur de l'ampoule est subdivisé en deux compartiments adjacents par une paroi isolante, et chaque chambre d'extinction est insérée dans l'ampoule par le fond en prenant appui sur des rebords du compartiment correspondant.The movable contact is switched off automatically as soon as the arc switches to the end electrode. The low mass of the mobile contact makes it possible to accelerate the shunting of the mobile contact. Each breaking module is formed by a one-piece rectangular plastic bulb, containing the two fixed contacts, the two arc extinguishing chambers, the common end plate, and a pair of connection pads. The interior of the bulb is subdivided into two adjacent compartments by an insulating wall, and each extinguishing chamber is inserted into the bulb from the bottom, bearing on the edges of the corresponding compartment.

La tôle d'extrémité commune s'étend sur toute la largeur de l'ampoule.The common end plate extends over the entire width of the bulb.

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 dessins annexés, dans lequel :

  • la figure 1 est une vue schématique en coupe du disjoncteur équipé d'un module de coupure selon l'invention, le contact mobile étant représenté en position d'ouverture,
  • la figure 2 est une vue en élévation du module de coupure selon la figure 1,
  • la figure 3 représente une vue du module d'actionnement mécanique du disjoncteur,
  • la figure 4 montre une vue du barreau de commutation,
  • les figures 5 à 7 sont des vues schématiques de fonctionnement du module de coupure, respectivement en position de fermeture, au début de la course d'ouverture, et en fin d'ouverture du contact mobile,
  • la figure 8 est une vue de dessous du module de coupure, les chambres d'extinction d'axe étant enlevées.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and represented in the appended drawings, in which:
  • FIG. 1 is a schematic sectional view of the circuit breaker equipped with a breaking module according to the invention, the movable contact being shown in the open position,
  • FIG. 2 is an elevation view of the cut-off module according to FIG. 1,
  • FIG. 3 represents a view of the mechanical actuation module of the circuit breaker,
  • FIG. 4 shows a view of the switching bar,
  • FIGS. 5 to 7 are schematic views of the operation of the cut-off module, respectively in the closed position, at the start of the opening stroke, and at the end of opening of the movable contact,
  • Figure 8 is a bottom view of the cut-off module, the axis extinction chambers being removed.

Sur les figures, un pôle d'un disjoncteur multipolaire 10 à boîtier 12 isolant moulé, comporte un module de coupure 14 unipolaire, formé par une ampoule 16 monobloc en matière plastique moulée, et ayant une forme de parallélépipède rectangle. L'ampoule 16 comprend un fond 18, une face avant 20 ayant un orifice 22 de passage du contact mobile 24, deux grandes faces latérales parallèles 26, 28 et deux petites faces 30, 32 parallèles de raccordement. Le module de coupure 14 est du type à répulsion électrodynamique des contacts.In the figures, a pole of a multipole circuit breaker 10 with molded insulating housing 12 comprises a single-pole breaking module 14, formed by a one-piece bulb 16 of molded plastic, and having the shape of a rectangular parallelepiped. The bulb 16 comprises a bottom 18, a front face 20 having an orifice 22 for the passage of the movable contact 24, two large parallel lateral faces 26, 28 and two small parallel faces 30, 32 for connection. The breaking module 14 is of the type with electrodynamic repulsion of the contacts.

A l'intérieur de l'ampoule 16, se trouvent deux contacts fixes 34, 36 reliés respectivement par des conducteurs 35, 37 de liaison à une première plage 38 d'une borne de raccordement 40, et à une deuxième plage 42 destinée à être connectée par une vis 43 à une troisième plage de contact 44 d'un module de déclenchement 46.Inside the bulb 16, there are two fixed contacts 34, 36 connected respectively by conductors 35, 37 for connection to a first pad 38 of a connection terminal 40, and to a second pad 42 intended to be connected by a screw 43 to a third contact pad 44 of a trigger module 46.

Le dispositif de déclenchement comporte un module déclencheur 46 magnétothermique, équipé à l'opposé de la plage 44, d'une quatrième plage de contact 48 faisant partie de l'autre borne 50 de raccordement du pôle. Le module déclencheur 46 est inséré en série dans le pôle avec les contacts 34, 36, 24 du module de coupure 14.The triggering device comprises a magnetothermal trigger module 46, equipped opposite the pad 44, with a fourth contact pad 48 forming part of the other terminal 50 for connecting the pole. The trip module 46 is inserted in series in the pole with the contacts 34, 36, 24 of the cut-off module 14.

Dans l'état fermé du disjoncteur, le courant rentre par la borne 40 d'entrée, et circule successivement dans la plage 38, le conducteur 35, le contact fixe 34, le contact mobile 24, l'autre contact fixe 36, le conducteur 37, les plages 42, 44, le déclencheur 46, la plage de contact 48 et la borne 50 de sortie.In the closed state of the circuit breaker, the current returns through the input terminal 40, and flows successively in the range 38, the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, the pads 42, 44, the trip unit 46, the contact pad 48 and the output terminal 50.

Le dispositif de déclenchement comprend de plus une barre de déclenchement 52 montée à rotation limitée entre une position armée et une position déclenchée en fonction de la position de l'organe d'actionnement du déclencheur 46, par exemple la bilame 54 ou la palette 56. La barre 52 rotative est déplacée vers la position déclenchée dès que le courant circulant dans le pôle dépasse un seuil prédéterminé. La barre de déclenchement 52 coopère d'autre part avec un verrou 58 d'accrochage d'un mécanisme 60 de commande à genouillère 62 et à manette 64.
Le mécanisme 60 est commun à l'ensemble des pôles, et est logé dans le boîtier 12 entre une paire de platines support 66, métalliques, seule la manette 64 étant accessible de l'extérieur en traversant une lumière de passage du boîtier 12, pour la commande du disjoncteur 10.The triggering device further comprises a trigger bar 52 mounted with limited rotation between an armed position and a triggered position as a function of the position of the actuator of the trigger 46, for example the bimetallic strip 54 or the pallet 56. The rotary bar 52 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold. Trigger bar 52 cooperates on the other hand, with a latch 58 for attaching a control mechanism 60 to toggle joint 62 and to lever 64.
The mechanism 60 is common to all of the poles, and is housed in the housing 12 between a pair of metal support plates 66, only the handle 64 being accessible from the outside by passing through a passageway of the housing 12, for circuit breaker control 10.

La biellette inférieure 80 de la genouillère 62 est accouplée à une protubérance 81 d'un barreau 82 de commutation servant de support aux contacts mobiles 24 de tous les pôles. Le barreau 82 de commutation est réalisé en matériau isolant et s'étend parallèlement à la barre de déclenchement 52 dans la direction transversale des pôles.The lower link 80 of the toggle joint 62 is coupled to a protuberance 81 of a switching bar 82 serving to support the movable contacts 24 of all the poles. The switching bar 82 is made of insulating material and extends parallel to the trigger bar 52 in the transverse direction of the poles.

Une action de déverrouillage de la barre de déclenchement 52 sur le verrou 58 libère le mécanisme 60, lequel se désarme sous l'action de détente d'un ressort 72 d'embiellage, entraînant le déplacement par pivotement de la genouillère 62, et la rotation du barreau 82 vers la position d'ouverture des contacts 34, 36, 24 de tous les pôles. L'ordre de déverrouillage du verrou 58 peut provenir du module déclencheur 46 magnétothermique, ou d'un déclencheur auxiliaire, notamment à manque de tension MN, à émission de courant MX, différentiel, etc...An unlocking action of the trigger bar 52 on the latch 58 releases the mechanism 60, which disarms under the detent action of a connecting rod spring 72, causing the pivoting movement of the toggle joint 62, and the rotation from the bar 82 to the open position of the contacts 34, 36, 24 of all the poles. The unlocking order of the lock 58 can come from the magnetothermal trigger module 46, or from an auxiliary trigger, in particular with a lack of voltage MN, with emission of current MX, differential, etc.

Chaque module de coupure 14 renferme deux chambres d'extinction d'arc 84, 86, se trouvant en communication avec une ouverture ou canal 88 d'échappement des gaz de coupure vers l'extérieur de l'ampoule 16. Chaque chambre d'extinction d'arc 84, 86 est formée par un empilage de tôles de désionisation à encoches en V orientées vers le contact mobile 24.Each cut-off module 14 contains two arc extinguishing chambers 84, 86, being in communication with an opening or channel 88 for exhaust of the cut-off gases towards the outside of the bulb 16. Each extinguishing chamber arc 84, 86 is formed by a stack of deionization plates with V-notches oriented towards the movable contact 24.

Le barreau de commutation 82, montré en détail à la figure 4, est équipé de trois contacts mobiles 24, répartis à intervalles réguliers le long de la direction transversale du barreau 82. Chaque contact mobile 24 présente une forme de fourche coopérant en position de fermeture avec les deux contacts fixes 34, 36.The switching bar 82, shown in detail in FIG. 4, is equipped with three movable contacts 24, distributed at regular intervals along the transverse direction of the bar 82. Each movable contact 24 has the form of a fork cooperating in the closed position with the two fixed contacts 34, 36.

Sur la figure 2, les grandes faces latérales 26, 28 de chaque ampoule 16 comportent une paire d'encoches 90 en forme de U, orientées du côté de la face avant 20, et servant de paliers pour le barreau de commutation 82.In FIG. 2, the large lateral faces 26, 28 of each bulb 16 comprise a pair of U-shaped notches 90, oriented on the side of the front face 20, and serving as bearings for the switching bar 82.

L'intérieur de l'ampoule 16 de chaque module de coupure 14 est subdivisé par une paroi 92 isolante intermédiaire en deux compartiments adjacents 94, 96 ouverts du côté du fond 18.The interior of the bulb 16 of each breaking module 14 is subdivided by an insulating wall 92 intermediate into two adjacent compartments 94, 96 open on the bottom side 18.

Le contact mobile 24 en fourche pénètre dans les deux compartiments 94, 96 par l'orifice 22 situé à l'opposé du fond 18, et se trouve positionné à cheval sur la paroi 92.The movable fork contact 24 enters the two compartments 94, 96 through the orifice 22 located opposite the bottom 18, and is positioned astride the wall 92.

Le contact fixe 34 et la chambre d'extinction d'arc 84 sont logés dans le premier compartiment 94. L'autre contact fixe 36 et la chambre d'extinction d'arc 96 sont dans le deuxième compartiment 96.The fixed contact 34 and the arc extinguishing chamber 84 are housed in the first compartment 94. The other fixed contact 36 and the arc extinguishing chamber 96 are in the second compartment 96.

Chaque contact fixe 34, 36 est prolongé dans le compartiment 94, 96 associé par une électrode 98, 100 métallique servant de corne d'arc, laquelle est disposée à l'opposé du conducteur de liaison 35, 37. Les deux électrodes 98, 100 sont rectilignes et s'étendent parallèlement l'une à l'autre en étant séparées par la paroi 92 isolante.Each fixed contact 34, 36 is extended in the compartment 94, 96 associated by a metal electrode 98, 100 serving as an arc horn, which is arranged opposite the connecting conductor 35, 37. The two electrodes 98, 100 are rectilinear and extend parallel to each other, being separated by the insulating wall 92.

Les deux chambres d'extinction d'arc 84, 86 comportent une tôle d'extrémité 102 commune, laquelle s'étend sur toute la largeur de l'ampoule 16 du côté de l'ouverture d'échappement 88. La paroi 92 isolante s'étend dans le plan médian de l'ampoule 16 et est perpendiculaire à la tôle d'extrémité 102 métallique sans la traverser. La tôle d'extrémité 102 est dotée de deux encoches 104, 106 en V alignées respectivement avec les encoches des tôles élémentaires des chambres 84, 86.The two arc extinguishing chambers 84, 86 have a common end plate 102, which extends over the entire width of the bulb 16 on the side of the exhaust opening 88. The insulating wall 92 s 'extends in the median plane of the bulb 16 and is perpendicular to the metal end plate 102 without passing through it. The end sheet 102 has two notches 104, 106 in a V aligned respectively with the notches of the elementary sheets of the chambers 84, 86.

Les deux chambres d'extinction d'arc 84, 86 à tôles de désionisation, se trouvent encadrées par la tôle d'extrémité 102 commune, et les deux électrodes 98, 100. Les deux conducteurs de liaison 35, 37 sont agencés à l'extérieur de l'ampoule 16 dans des logements prévus dans des grandes faces latérales 26, 28.The two arc extinguishing chambers 84, 86 with deionization sheets, are surrounded by the common end sheet 102, and the two electrodes 98, 100. The two connecting conductors 35, 37 are arranged at the outside of the bulb 16 in housings provided in large lateral faces 26, 28.

La circulation et l'interruption du courant dans un module de coupure 14 s'effectuent de la manière suivante :The circulation and interruption of the current in a cut-off module 14 is carried out as follows:

Dans l'état fermé des contacts 34, 36, 24 d'un pôle du disjoncteur, le sens de circulation du courant nominal est représenté par les flèches sur la figure 5. En rentrant par la première plage 38, le courant parcourt le conducteur de liaison 35 vers le contact fixe 34, puis circule dans le contact mobile 24 en fourche en passant du premier compartiment 94 vers le deuxième compartiment 96. Il ressort de l'ampoule 16 vers la deuxième plage de raccordement 42 en passant par le contact fixe 36, et le conducteur de liaison 37. Le courant nominal ne circule ni dans les électrodes 98, 100, ni dans la tôle d'extrémité 102.In the closed state of the contacts 34, 36, 24 of a pole of the circuit breaker, the direction of flow of the nominal current is represented by the arrows in FIG. 5. When entering through the first area 38, the current flows through the conductor of link 35 to the fixed contact 34, then circulates in the movable contact 24 in a fork passing from the first compartment 94 to the second compartment 96. It emerges from the bulb 16 towards the second connection pad 42 via the fixed contact 36 , and the connecting conductor 37. The nominal current flows neither in the electrodes 98, 100, nor in the end sheet 102.

Le passage d'un courant de court-circuit dans le pôle engendre un effet de répulsion électrodynamique qui tend à écarter le contact mobile 24 des contacts fixes 34, 36, avec apparition d'un arc électrique. Au début de la course d'ouverture, l'arc reste ancré sur les contacts 34, 36 et 24 (fig. 6), et est ensuite propulsé en direction des tôles de désionisation des deux chambres 84, 86.
Lorsque le contact mobile 24 arrive au voisinage des encoches 104 et 106 de la tôle d'extrémité 102 en fin de course d'ouverture (fig. 7), l'arc commute automatiquement sur la tôle d'extrémité 102 en mettant le contact mobile 24 hors courant. Le trajet du courant dans l'ampoule 16 est alors modifié de la manière suivante :The passage of a short-circuit current through the pole generates an electrodynamic repulsion effect which tends to separate the movable contact 24 from the fixed contacts 34, 36, with the appearance of an electric arc. At the start of the opening race, the arch remains anchored on the contacts 34, 36 and 24 (fig. 6), and is then propelled in the direction of the deionization plates of the two chambers 84, 86.
When the movable contact 24 arrives in the vicinity of the notches 104 and 106 of the end sheet 102 at the end of the opening stroke (FIG. 7), the arc automatically switches to the end sheet 102 by putting the movable contact 24 out of current. The current path in the bulb 16 is then modified as follows:

A partir du contact fixe 34, le courant d'arc parcourt successivement l'électrode 98 et la première chambre d'extinction 84 dans le premier compartiment 94, puis traverse la tôle d'extrémité 102 dans la direction transversale de l'ampoule 16 pour circuler dans le deuxième compartiment 96 à travers la chambre d'extinction 86, l'électrode 100 et le contact fixe 36. Les deux chambres d'extinction d'arc 84, 86 se trouvent connectées électriquement en série par le passage du courant d'arc dans la tôle 102. ll en résulte un refroidissement efficace de l'arc et une extinction rapide de ce dernier.From the fixed contact 34, the arc current successively travels through the electrode 98 and the first extinguishing chamber 84 in the first compartment 94, then crosses the end sheet 102 in the transverse direction of the bulb 16 to circulate in the second compartment 96 through the extinguishing chamber 86, the electrode 100 and the fixed contact 36. The two arc extinguishing chambers 84, 86 are electrically connected in series by the passage of the current arc in the sheet 102. This results in effective cooling of the arc and rapid extinction of the latter.

La mise hors courant du contact mobile 24, à la suite de la migration de l'arc sur la tôle d'extrémité 102 commune, s'opère d'autant plus vite que la masse du contact mobile 24 est faible.Switching off the movable contact 24, following the migration of the arc on the common end plate 102, takes place all the more quickly when the mass of the movable contact 24 is low.

Des joues de guidage d'arc, dont une 108 est représentée sur la figure 2, sont intégrées dans les parois latérales, délimitant les deux compartiments 94, 96 juxtaposés de l'ampoule 16. Ces joues sont réalisées en matériau isolant résistant à l'action de l'arc, ce matériau étant différent de celui utilisé pour le reste de l'ampoule 16 monobloc.Arc guide cheeks, one of which 108 is shown in FIG. 2, are integrated into the side walls, delimiting the two compartments 94, 96 juxtaposed with the bulb 16. These cheeks are made of insulating material resistant to arc action, this material being different from that used for the rest of the one-piece bulb 16.

Les chambres d'extinction d'arc 84, 86 prennent appui sur des rebords 110 de l'ampoule 16, après insertion par le fond 18. Ces chambres 84, 86 comportent plusieurs types interchangeables en fonction du pouvoir de coupure souhaité.The arc extinguishing chambers 84, 86 are supported on flanges 110 of the bulb 16, after insertion through the bottom 18. These chambers 84, 86 comprise several interchangeable types as a function of the desired breaking capacity.

La tôle d'extrémité 102 peut être percée de trous 112, (voir figure 6), faisant communiquer la sortie des chambres 84, 86 avec l'ouverture 88 d'échappement des gaz de coupure.The end sheet 102 can be pierced with holes 112 (see FIG. 6), making the outlet of the chambers 84, 86 communicate with the opening 88 for the exhaust of the cutting gases.

Claims (5)

Disjoncteur électrique à boîtier (12) isolant moulé ayant un module de coupure (14) comprenant par pôle : - deux chambres d'extinction d'arc (84) (86), disposées côte-à-côte, et ayant chacune un empilage de tôles métalliques de désionisation, - une paroi (92) intermédiaire réalisée en matériau isolant, et intercalée entre les deux chambres d'extinction d'arc (84), (86), - une paire de contacts fixes (34), (36) coopérant avec un contact mobile (24) en forme de fourche positionnée à cheval sur ladite paroi (92), - et un mécanisme (60) de commande du contact mobile (24) pour ouvrir et fermer le disjoncteur, caractérisé en ce que les deux chambres d'extinction d'arc (84), (86), comportent une tôle d'extrémité (102) commune, en matériau conducteur, disposée à l'opposé des contacts fixes (34), (36), et servant à la fois d'organe de shuntage du contact mobile (24) en fin de course d'ouverture après commutation de l'arc sur ladite tôle d'extrémité (102), et d'organe de couplage électrique en série des deux chambres d'extinction d'arc (84), (86), que chaque module de coupure (14) est formé par une ampoule (16) monobloc parallélépipèdique en matière plastique, renfermant les deux contacts fixes (34), (36), les deux chambres d'extinction d'arc (84), (86), la tôle d'extrémité commune (102), et une paire de plages de raccordement (38), (42), que la paroi (92) intermédiaire subdivise l'intérieur de l'ampoule (16) en deux compartiments (94), (96) adjacents, ouverts du côté du fond (18), et que le contact mobile (24) pénètre dans les deux compartiments (94), (96) par un orifice de passage (22) situé à l'opposé du fond (18).Electric molded case circuit breaker (12) having a cut-off module (14) comprising per pole: - two arc extinguishing chambers (84) (86), arranged side by side, and each having a stack of metal sheets of deionization, - an intermediate wall (92) made of insulating material, and interposed between the two arc extinguishing chambers (84), (86), a pair of fixed contacts (34), (36) cooperating with a movable contact (24) in the form of a fork positioned astride said wall (92), - And a mechanism (60) for controlling the movable contact (24) for opening and closing the circuit breaker, characterized in that the two arc extinguishing chambers (84), (86), comprise a common end plate (102), of conductive material, arranged opposite the fixed contacts (34), (36 ), and serving both as a shunting device for the movable contact (24) at the end of the opening stroke after switching of the arc on said end plate (102), and as an electrical coupling device in series of the two arc extinguishing chambers (84), (86), that each cut-off module (14) is formed by a bulb (16) of a parallelepiped plastic piece, enclosing the two fixed contacts (34), (36 ), the two arc extinguishing chambers (84), (86), the common end plate (102), and a pair of connection pads (38), (42), as the wall (92) intermediate subdivides the interior of the bulb (16) into two compartments (94), (96) adjacent, open on the bottom side (18), and that the movable contact (24) enters the two compartments (94), (96) with an o passage opening (22) located opposite the bottom (18). Disjoncteur selon la revendication 1, caractérisé en ce que la tôle d'extrémité (102) s'étend parallèlement aux tôles élémentaires des deux chambres d'extinction d'arc (84), (86), que chaque contact fixe (34), (36) est prolongé par une électrode (98), (100), métallique servant de corne d'arc, et que ladite paroi (92) isolante est agencée entre les deux électrodes (98), (100) dans le plan médian perpendiculaire à la tôle d'extrémité (102).Circuit breaker according to claim 1, characterized in that the end plate (102) extends parallel to the elementary plates of the two arc extinguishing chambers (84), (86), that each fixed contact (34), (36) is extended by an electrode (98), (100), metallic serving as an arc horn, and that said insulating wall (92) is arranged between the two electrodes (98), (100) in the perpendicular median plane to the end plate (102). Disjoncteur selon la revendication 1 ou 2, caractérisé en ce que la tôle d'extrémité (102) comporte deux encoches en V (104), (106), alignées respectivement avec les encoches des tôles des chambres d'extinction d'arc (84), (86).Circuit breaker according to claim 1 or 2, characterized in that the end plate (102) comprises two V-shaped notches (104), (106), aligned respectively with the notches of the sheets of the arc extinguishing chambers (84 ), (86). Disjoncteur selon la revendication 3, caractérisé en ce que la tôle d'extrémité (102) est percée de trous (112) faisant communiquer la sortie des chambres d'extinction d'arc (84), (86) avec un canal (88) d'échappement des gaz de coupure.Circuit breaker according to claim 3, characterized in that the end plate (102) is pierced with holes (112) communicating the output of the arc extinguishing chambers (84), (86) with a channel (88) cut-off gas exhaust. Disjoncteur selon la revendication 1, caractérisé en ce que la tôle d'extrémité (102) commune s'étend sur toute la largeur de l'ampoule (16), et que chaque chambre d'extinction d'arc (84), (86) prend appui sur des rebords (110) du compartiment (94), (96) correspondant, lesdites tôles étant perpendiculaires au fond (18).Circuit breaker according to claim 1, characterized in that the common end plate (102) extends over the entire width of the bulb (16), and that each arc extinguishing chamber (84), (86 ) is supported on edges (110) of the compartment (94), (96) corresponding, said sheets being perpendicular to the bottom (18).
EP19940420093 1993-04-07 1994-03-22 Electric circuit breaker with electrodynamic repulsion of the contacts and double extinguishing chambers Expired - Lifetime EP0619592B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304297 1993-04-07
FR9304297A FR2703821B1 (en) 1993-04-07 1993-04-07 Electric circuit breaker with electrodynamic repulsion of contacts and with double breaking chambers.

Publications (2)

Publication Number Publication Date
EP0619592A1 true EP0619592A1 (en) 1994-10-12
EP0619592B1 EP0619592B1 (en) 1997-01-29

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EP19940420093 Expired - Lifetime EP0619592B1 (en) 1993-04-07 1994-03-22 Electric circuit breaker with electrodynamic repulsion of the contacts and double extinguishing chambers

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EP (1) EP0619592B1 (en)
DE (1) DE69401605T2 (en)
ES (1) ES2097626T3 (en)
FR (1) FR2703821B1 (en)

Cited By (7)

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EP1220260A1 (en) * 2000-12-27 2002-07-03 ABB Schweiz AG Circuit breaker with a double break contact arrangement
WO2003001549A1 (en) * 2001-06-22 2003-01-03 Abb Service S.R.L. Miniature circuit breaker pole
CN101377989B (en) * 2007-08-27 2012-04-25 富士电机机器制御株式会社 Circuit breaker
CN101038835B (en) * 2006-03-13 2012-07-04 富士电机机器制御株式会社 Circuit breaker
EP2618354A1 (en) * 2012-01-23 2013-07-24 General Electric Company Arc chute assembly and method of manufacturing same
WO2014068054A1 (en) * 2012-10-31 2014-05-08 Eaton Industries (Austria) Gmbh Dc voltage switching device
RU2765687C1 (en) * 2020-06-24 2022-02-02 Шнейдер Электрик Эндюстри Сас Interruption unit with auxiliary shunting component and dual power continuous switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803922A1 (en) * 1998-02-02 1999-08-05 Maier & Cie C Contact set for electrical installation switch fitted to current rail in LV distribution network

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FR2495826A1 (en) * 1980-12-09 1982-06-11 Merlin Gerin MINIATURE HIGH BREAKING CIRCUIT BREAKER
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EP0418754A2 (en) * 1989-09-18 1991-03-27 Mitsubishi Denki Kabushiki Kaisha Current limiting apparatus

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CH299499A (en) * 1951-04-08 1954-06-15 Siemens Ag Electric switch.
CH501993A (en) * 1969-03-25 1971-01-15 Bbc Brown Boveri & Cie Automatic screw fuse
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1220260A1 (en) * 2000-12-27 2002-07-03 ABB Schweiz AG Circuit breaker with a double break contact arrangement
WO2002052598A1 (en) * 2000-12-27 2002-07-04 Abb Schweiz Ag Power switch with a double breaking contact arrangement
WO2003001549A1 (en) * 2001-06-22 2003-01-03 Abb Service S.R.L. Miniature circuit breaker pole
CN1320582C (en) * 2001-06-22 2007-06-06 Abb服务有限公司 Modular four-pole residual current circuit breaker
CN101038835B (en) * 2006-03-13 2012-07-04 富士电机机器制御株式会社 Circuit breaker
CN101377989B (en) * 2007-08-27 2012-04-25 富士电机机器制御株式会社 Circuit breaker
EP2618354A1 (en) * 2012-01-23 2013-07-24 General Electric Company Arc chute assembly and method of manufacturing same
CN103227081A (en) * 2012-01-23 2013-07-31 通用电气公司 Arc chute assembly and method of manufacturing same
US8912461B2 (en) 2012-01-23 2014-12-16 General Electric Company Arc chute assembly and method of manufacturing same
CN103227081B (en) * 2012-01-23 2017-05-24 通用电气公司 Arc chute assembly and method of manufacturing same
WO2014068054A1 (en) * 2012-10-31 2014-05-08 Eaton Industries (Austria) Gmbh Dc voltage switching device
CN104813428A (en) * 2012-10-31 2015-07-29 伊顿工业（奥地利）有限公司 Dc voltage switching device
RU2765687C1 (en) * 2020-06-24 2022-02-02 Шнейдер Электрик Эндюстри Сас Interruption unit with auxiliary shunting component and dual power continuous switch

Also Published As

Publication number Publication date
FR2703821B1 (en) 1995-05-12
DE69401605D1 (en) 1997-03-13
DE69401605T2 (en) 1997-06-26
ES2097626T3 (en) 1997-04-01
FR2703821A1 (en) 1994-10-14
EP0619592B1 (en) 1997-01-29

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