EP0021882A1 - Electric current interrupting apparatus of the current limiting type - Google Patents

Electric current interrupting apparatus of the current limiting type Download PDF

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Publication number
EP0021882A1
EP0021882A1 EP80400734A EP80400734A EP0021882A1 EP 0021882 A1 EP0021882 A1 EP 0021882A1 EP 80400734 A EP80400734 A EP 80400734A EP 80400734 A EP80400734 A EP 80400734A EP 0021882 A1 EP0021882 A1 EP 0021882A1
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EP
European Patent Office
Prior art keywords
bridge
movable
contact bridge
movable contact
slide
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.)
Withdrawn
Application number
EP80400734A
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German (de)
French (fr)
Inventor
Pierre Lemarquand
Claude Battefort
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Hazemeyer Sa SA
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Hazemeyer Sa SA
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Publication date
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Publication of EP0021882A1 publication Critical patent/EP0021882A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective 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
    • H01H77/10—Protective 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
    • H01H77/102—Protective 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
    • H01H77/105—Protective 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 whereby the blow-off movement unlatches the contact from a contact holder

Definitions

  • the present invention relates to an electric current cutoff device of the current limiting type.
  • Cutting devices of this type comprising, on the one hand, at least one pair of fixed contacts which are capable of being connected by a movable contact bridge between an open position and a closed position and vice versa and which are shaped so as to exert on said bridge electrodynamic repulsion forces tending to push said bridge towards its open position when said fixed contacts and the movable bridge are traversed by a current whose intensity is greater than a determined threshold and, on the other hand, an energy accumulation mechanism capable of actuating said bridge between its open and closed positions and of being controlled by a protection release.
  • These known breaking devices also include a mechanical escapement device intended to produce a partially independent mechanical connection between said bridge - of movable contact and the actuation mechanism.
  • the trigger is designed to protect against thermal and magnetic overloads and its trigger threshold is of the order of 1.25 times the nominal current.
  • the trigger acts alone to open the circuit.
  • the circuit opens first abruptly under the action of electrodynamic repulsion forces, and then the opening action is completed by the trigger, the operation of which is slower than the action of said repulsion forces.
  • the present invention relates to a particularly advantageous structure of the mechanical escapement device, allowing a practically instantaneous opening of the circuit in the case of electrodynamic repulsion forces due to high overcurrents.
  • the mechanical escapement device comprises a slide movable under the action of the actuation mechanism, between two extreme positions corresponding respectively to the open and closed positions of the movable contact bridge, said slide being hollow and forming a sheath which encloses a hooking system with elastic transverse expansion capable of spontaneously hooking behind at least one hooking element secured to said sheath, the transverse retraction of said hooking system being controlled by a member secured to said movable contact bridge, when this is repelled by electrodynamic forces.
  • the slide in its extreme position corresponding to the closing of the electrical circuit and the contact pressure of the movable bridge on the fixed contacts is transmitted by the cooperation of the latching system, then in radial expansion. , with said attachment element secured to the sheath. If a significant overcurrent appears, the bridge is pushed back by electro-dynamic forces and the member secured to the contact bridge is pushed back by compressing the system transversely hanging. The latter therefore suddenly escapes the attachment element and the movable contact bridge abruptly moves away from the fixed contacts, producing an almost instantaneous opening of the circuit, because said member integral with the movable contact bridge slides in the sheath, which remains during this time in its extreme position corresponding to the closing of the circuit.
  • the fastening element integral with the sheath is disposed in an intermediate part of the latter and the slide moves in a well, so that, when the trigger moves the sheath from its extreme closed position to its position extreme opening after repulsion of the movable contact bridge, said sleeve slides relative to the attachment system which is retained in position by the cooperation of the movable contact bridge with the edge of the wells and which, at a moment, can expand transversely to recooperate with said latching element.
  • the escapement device is reset automatically and the cut-off device can be reset by simple voluntary action on the actuation mechanism.
  • magnetizable means are provided through which the current to be cut passes and capable of attracting, in the event of a significant overcurrent, a body free to move parallel to the slide, which then comes in contact with the movable contact bridge to act on it in the same direction as said repulsion forces.
  • the attachment system consists of two crossed rods, hinged together and in support on a spring which is housed in a hollow rod integral with the movable contact bridge and whose action tends to separate the ends of said rods opposite to said spring from one another.
  • the latter can expand transversely or, on the contrary, be closed by said hollow rod inside which they penetrate.
  • the different sliders are made integral with each other by a coupling.
  • Each pair of fixed contacts, the mobile contact bridge and the corresponding slide are arranged in a compartment independent of the device housing, this compartment being subdivided into a breaking chamber where the fixed contacts and the mobile contact bridge are located, a well in which the slide slides and an expansion chamber separated from the breaking chamber by one or more grids extending between the external walls of the well and the internal walls of the compartment.
  • the current limiting circuit breaker shown in FIGS. 1 to 7 comprises a housing 1 in which several compartments 2 are provided, separated from one another by walls, these compartments being arranged one behind the other in FIGS. 1 to 3, so that only one of them is visible in these figures.
  • each compartment 2 near its bottom, a pair of fixed contacts 3 and 4 is provided, arranged on current leads 5 and 6, forming symmetrical loops of one another with respect to a plane orthogonal to the plan of Figures 1 to 3, and capable of cooperating with a pair of movable contacts 7 and 8 carried at the ends of a rigid bridge 9.
  • the shapes of the current leads 5 and 6 and of the rigid bridge 9 are chosen so that, known way, repulsive forces Significant ions arise there, when very high currents pass between contacts 3 and 7, on the one hand, and 4 and 8, on the other.
  • Contacts 3 to 8 are arranged in the lower part 2a of each compartment 2, forming an interrupting chamber and arranged accordingly, in known manner.
  • each compartment 2 In the middle upper part of each compartment 2 is provided a well 10, in which a slide 11 can slide parallel to the opening and closing directions of the rigid contact bridge 9 to which it is connected in the manner described below.
  • the peripheral upper part 2b of each compartment 2 is separated from the inside of the well 10 by the walls of the latter and from the breaking chamber 2a by grids 12. This part 2b forms an expansion chamber.
  • the different current leads 5 are connected to corresponding connection terminals 13, arranged in compartments 14 of the housing 1.
  • the different current leads 6 are connected to a trigger 15 with current threshold intended to protect, in known manner, the electrical circuit against thermal and magnetic overloads.
  • This trip unit is housed in an isolated compartment of the housing 1 and it actuates a sliding rod 16 penetrating into another isolated compartment 17 of the housing 1, in which is housed the normal actuation mechanism 18 of the current limiting circuit breaker.
  • the actuating mechanism 18 is of the tumbler type with rods and spring and whose lock 19 is capable of being controlled by the trigger 15 by means of the sliding rod 16.
  • the actuating mechanism 18 is capable of being actuated by an operating lever 20, accessible from the outside.
  • the slides 11 are made integral with each other by transverse axes 35 and all of said slides 11 are coupled to the actuation mechanism 18 by a rocking lever 21.
  • magnetizable parts 22 and 23 fixed thereon, and opposite which are arranged magnetic plates 24 and 25, integral with a bar 26, free to move parallel to the opening and closing directions of the contact bridge 9.
  • the latter has a projection 27, passing between the current leads 5 and 6 and capable of cooperating with the bar 26.
  • the current limiting circuit breaker according to the invention is in the closed circuit position: in this case, the operating lever is in its extreme right position, while the sliders 11 are in their extreme low position and that the rod 16 remains distant from the lock 19.
  • the opening of the contacts can also be done under the action of the trigger 15.
  • the rod 16 acts on the lock 19 (see FIG. 2) so that the mechanism 18 switches partially in the direction of the arrow F 1 .
  • the current limiting circuit breaker can be actuated either manually or by the trigger 15. Thanks to the connection between the contact bridges 9 and the slides 11, described below, the automatic triggering by the trigger 15 is accelerated by case of a passade of too great intensity.
  • each slide 11 has a sleeve 28, inside which can slide a hollow rod 29 integral with the contact bridge 9, the sliding being done parallel to the opening and closing of that -this.
  • a spring 30 pressing, in the direction of their spacing, two crossed rods 31 and 32, which are articulated around an axis 33 and whose ends 36 and 37 opposite are rounded and bear on the free end of the spring 30 by means of a disc 38.
  • the free ends 39 and 40 of the links 31 and 32, opposite the spring 30, are capable of bearing on the flanges directed towards them, of a stirrup 34 placed at the bottom of the sheath 28.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

A device with escapement in the event of significant overloads. The device with escapement comprises two crossed rods 31,32 hinged at the end of a spring 30 housed in a hollow bar 29 integral with the moving contact bridge 9. Protection against short circuits. <IMAGE>

Description

La présente invention concerne un appareil de coupure de courant électrique du type limiteur d'intensité.The present invention relates to an electric current cutoff device of the current limiting type.

On connaît déjà des appareils de coupure de ce type, comportant, d'une part, au moins une paire de contacts fixes qui sont susceptibles d'être reliés par un pont de contact mobile entre une position d'ouverture et une position de fermeture et vice-versa et qui sont conformés de façon à exercer sur ledit pont des forces de répulsion électrodynamiques tendant à repousser ledit pont vers sa position d'ouverture lorsque lesdits contacts fixes et le pont mobile sont parcourus par un courant dont l'intensité est supérieure à un seuil déterminé et, d'autre part, un mécanisme à accumulation d'énergie susceptible d'actionner ledit pont entre ses positions d'ouverture et de fermeture et d'être commandé par un déclencheur de protection. Ces appareils de coupure connus comportent de plus un dispositif mécanique à échappement destiné à réaliser une liaison mécanique partiellement indépendante entre ledit pont - de contact mobile et le mécanisme d'actionnement.Cutting devices of this type are already known, comprising, on the one hand, at least one pair of fixed contacts which are capable of being connected by a movable contact bridge between an open position and a closed position and vice versa and which are shaped so as to exert on said bridge electrodynamic repulsion forces tending to push said bridge towards its open position when said fixed contacts and the movable bridge are traversed by a current whose intensity is greater than a determined threshold and, on the other hand, an energy accumulation mechanism capable of actuating said bridge between its open and closed positions and of being controlled by a protection release. These known breaking devices also include a mechanical escapement device intended to produce a partially independent mechanical connection between said bridge - of movable contact and the actuation mechanism.

Dans ces appareils connus, le déclencheur est prévu pour protéger contre les surcharges thermiques et magnétiques et son seuil de déclenchement est de l'ordre de 1,25 fois le courant nominal. Ainsi, pour des surintensités relativement faibles (entre 1,25 et environ 20 fois l'intensité nominale) le déclencheur agit seul pour ouvrir le circuit. En revanche, en cas de surintensités très importantes (court-circuit par exemple), l'ouverture du circuit s'effectue d'abord brusquement sous l'action de forces de répulsion électrodynamiques, et ensuite l'action d'ouverture est parachevée par le déclencheur, dont le fonctionnement est plus lent que l'action desdites forces de répulsion.In these known devices, the trigger is designed to protect against thermal and magnetic overloads and its trigger threshold is of the order of 1.25 times the nominal current. Thus, for relatively low overcurrents (between 1.25 and approximately 20 times the nominal current) the trigger acts alone to open the circuit. On the other hand, in the event of very large overcurrents (short circuit for example), the circuit opens first abruptly under the action of electrodynamic repulsion forces, and then the opening action is completed by the trigger, the operation of which is slower than the action of said repulsion forces.

La présente invention a pour objet une structure particulièrement avantageuse du dispositif mécanique à échappement, permettant une ouverture pratiquement instantanée du circuit dans le cas de forces de répulsion électrodynamiques dues à de fortes surintensités.The present invention relates to a particularly advantageous structure of the mechanical escapement device, allowing a practically instantaneous opening of the circuit in the case of electrodynamic repulsion forces due to high overcurrents.

A cette fin, selon l'invention, le dispositif mécanique à échappement comporte un coulisseau mobile sous l'action du mécanisme d'actionnement, entre deux positions extrêmes correspondant respectivement aux positions d'ouverture et de fermeture du pont de contact mobile, ledit coulisseau étant creux et formant un fourreau qui enferme un système d'accrochage à expansion transversale élastique susceptible de s'accrocher spontanément derrière au moins un élément d'accrochage solidaire dudit fourreau, la rétraction transversale dudit système d'accrochage étant commandée par un organe solidaire dudit pont de contact mobile, lorsque celui-ci est repoussé par les forces électrodynamiques.To this end, according to the invention, the mechanical escapement device comprises a slide movable under the action of the actuation mechanism, between two extreme positions corresponding respectively to the open and closed positions of the movable contact bridge, said slide being hollow and forming a sheath which encloses a hooking system with elastic transverse expansion capable of spontaneously hooking behind at least one hooking element secured to said sheath, the transverse retraction of said hooking system being controlled by a member secured to said movable contact bridge, when this is repelled by electrodynamic forces.

Ainsi, en position de passage du courant, le coulisseau est dans sa position extrême correspondant à la fermeture du circuit électrique et la pression de contact du pont mobile sur les contacts fixes est transmise par la coopération du système d'accrochage, alors en expansion radiale, avec ledit élément d'accrochage solidaire du fourreau. Si une surintensité importante apparaît, le pont est repoussé par les forces électro- dynamiqueset l'organe solidaire du pont du contact est repoussé en comprimant transversalement le système d'accrochage. Celui-ci échappe donc brusquement à l'élément d'accrochage et le pont de contact mobile s'éloigne brusquement des contacts fixes, produisant une ouverture quasiment instantanée du circuit, car ledit organe solidaire du pont de contact mobile coulisse dans le fourreau, qui reste pendant ce temps dans sa position extrême correspondant à la fermeture du circuit.Thus, in the current flow position, the slide is in its extreme position corresponding to the closing of the electrical circuit and the contact pressure of the movable bridge on the fixed contacts is transmitted by the cooperation of the latching system, then in radial expansion. , with said attachment element secured to the sheath. If a significant overcurrent appears, the bridge is pushed back by electro-dynamic forces and the member secured to the contact bridge is pushed back by compressing the system transversely hanging. The latter therefore suddenly escapes the attachment element and the movable contact bridge abruptly moves away from the fixed contacts, producing an almost instantaneous opening of the circuit, because said member integral with the movable contact bridge slides in the sheath, which remains during this time in its extreme position corresponding to the closing of the circuit.

De préférence, l'élément d'accrochage solidaire du fourreau est disposé dans une partie intermédiaire de celui-ci et le coulisseau se déplace dans un puits, de sorte que, lorsque le déclencheur déplace le fourreau de sa position extrême de fermeture à sa position extrême d'ouverture après répulsion du pont de contact mobile, ledit fourreau coulisse par rapport au système d'accrochage qui est retenu en position par la coopération du pont de contact mobile avec le bord des puits et qui, à un moment, peut se dilater transversalement pour recoopérer avec ledit élément d'accrochage.Ainsi, le dispositif à échappement est réarmé automatiquement et l'on peut réarmer l'appareil de coupure par simple action volontaire sur le mécanisme d'actionnement.Preferably, the fastening element integral with the sheath is disposed in an intermediate part of the latter and the slide moves in a well, so that, when the trigger moves the sheath from its extreme closed position to its position extreme opening after repulsion of the movable contact bridge, said sleeve slides relative to the attachment system which is retained in position by the cooperation of the movable contact bridge with the edge of the wells and which, at a moment, can expand transversely to recooperate with said latching element. Thus, the escapement device is reset automatically and the cut-off device can be reset by simple voluntary action on the actuation mechanism.

Avantageusement, afin de favoriser l'action de répulsion des forces électrodynamiques, on prévoit des moyens magnétisables traversés par le courant à couper et susceptibles d'attirer, en cas de surintensité importante, un corps libre de se déplacer parallèlement au coulisseau,qui vient alors au contact du pont de contact mobile pour agir sur celui-ci dans le même sens que lesdites forces des répulsions.Advantageously, in order to favor the repelling action of the electrodynamic forces, magnetizable means are provided through which the current to be cut passes and capable of attracting, in the event of a significant overcurrent, a body free to move parallel to the slide, which then comes in contact with the movable contact bridge to act on it in the same direction as said repulsion forces.

De préférence, le système d'accrochage est constitué de deux biellettes croisées, articulées entre elles et en appui sur un ressort qui est logé dans une tige creuse solidaire du pont de contact mobile et dont l'action tend à écarter l'une de l'autre les extrémités desdites biellettes opposées audit ressort. Ainsi, suivant la position de ladite tige creuse par rapport aux biellettes, celles-ci peuvent se dilater transversalement ou au contraire être refermées par ladite tige creuse à l'intérieur de laquelle elles pénètrent.Preferably, the attachment system consists of two crossed rods, hinged together and in support on a spring which is housed in a hollow rod integral with the movable contact bridge and whose action tends to separate the ends of said rods opposite to said spring from one another. Thus, depending on the position of said hollow rod relative to the rods, the latter can expand transversely or, on the contrary, be closed by said hollow rod inside which they penetrate.

Dans le cas où l'appareil selon l'invention comporte plusieurs paires de contacts fixes et autant de ponts de contact mobiles, les différents coulisseaux sont rendus solidaires les uns des autres par un attelage. Chaque paire de contacts fixes, le pont de contact mobile et le coulisseau correspondant sont disposés dans un compartiment indépendant du boîtier de l'appareil, ce compartiment étant subdivisé en une chambre de coupure où se trouvent les contacts fixes et le pont de contact mobile, un puits dans lequel coulisse le coulisseau et une chambre de détente séparée de la chambre de coupure par une ou plusieurs grilles s'étendant entre les parois extérieures du puits et les parois intérieures du compartiment.In the case where the apparatus according to the invention comprises several pairs of fixed contacts and as many movable contact bridges, the different sliders are made integral with each other by a coupling. Each pair of fixed contacts, the mobile contact bridge and the corresponding slide are arranged in a compartment independent of the device housing, this compartment being subdivided into a breaking chamber where the fixed contacts and the mobile contact bridge are located, a well in which the slide slides and an expansion chamber separated from the breaking chamber by one or more grids extending between the external walls of the well and the internal walls of the compartment.

Afin de préserver le mécanisme d'actionnement des projections d'arc au moment des coupures, celui-ci est disposé dans un compartiment du boîtier isolé des compartiments dans lesquels se trouvent les contacts fixes et les ponts de contact mobiles.In order to preserve the actuation mechanism of the arc projections at the time of the cuts, it is arranged in a compartment of the housing isolated from the compartments in which the fixed contacts and the movable contact bridges are located.

Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée.

  • La figure 1 est une vue en coupe longitudinale partielle d'un disjoncteur-limiteur de courant conforme à l'invention, les contacts étant en position de fermeture.
  • La figure 2 montre le disjoncteur-limiteur de courant de la figure 1, en vue semblable, en position d'ouverture effectuée au moyen de déclencheurs ampèremétriques.
  • La figure 3 montre le disjoncteur-limiteur de courant des figures 1 et 2, en position d'ouverture effectuée manuellement par la poignée de commande.
  • Les figures 4 à 7 illustrent, à différents stades d'ouverture, le dispositif mécanique à échappement et autoréarmement, réalisant la liaison mécanique partiellement indépendante entre les ponts de contacts mobiles du disjoncteur-limiteur de courant des figures 1 à 3 et le mécanisme d'actionnement normal desdits ponts de contacts mobiles.
The figures of the appended drawing will make it clear how the invention can be implemented.
  • Figure 1 is a partial longitudinal sectional view of a current limiting circuit breaker according to the invention, the contacts being in the closed position.
  • Figure 2 shows the circuit breaker-current limiter of Figure 1, in a similar view, in the open position performed by means of ammeter releases.
  • Figure 3 shows the current limiting circuit breaker of Figures 1 and 2, in the open position performed manually by the control handle.
  • Figures 4 to 7 illustrate, at different stages of opening, the mechanical escapement and self-resetting device, making the partially independent mechanical connection between the movable contact bridges of the circuit breaker-current limiter of Figures 1 to 3 and the mechanism normal actuation of said movable contact bridges.

Le disjoncteur-limiteur de courant montré par les figures 1 à 7, comporte un boîtier 1, dans lequel sont prévus plusieurs compartiments 2, séparés les uns des autres par des parois, ces compartiments étant disposés les uns derrière les autres sur les figures 1 à 3, de sorte qu'un seul d'entre eux est visible sur ces figures.The current limiting circuit breaker shown in FIGS. 1 to 7 comprises a housing 1 in which several compartments 2 are provided, separated from one another by walls, these compartments being arranged one behind the other in FIGS. 1 to 3, so that only one of them is visible in these figures.

Dans chaque compartiment 2, au voisinage de son fond, est prévue une paire de contacts fixes 3 et 4, agencés sur des amenées de courant 5 et 6, formant des boucles symétriques l'une de l'autre par rapport à un plan orthogonal au plan des figures 1 à 3, et susceptibles de coopérer avec une paire de contacts mobiles 7 et 8 portés aux extrémités d'un pont rigide 9. Les formes des amenées de courant 5 et 6 et du pont rigide 9 sont choisies pour que, de façon connue, des forces de répulsion importantes y prennent naissance, lorsque des courants de très grande intensité passent entre les contacts 3 et 7, d'une part, et 4 et 8, d'autre part. Les contacts 3 à 8 sont disposés dans la partie inférieure 2a de chaque compartiment 2, formant chambre de coupure et aménagée en conséquence, de façon connue.In each compartment 2, near its bottom, a pair of fixed contacts 3 and 4 is provided, arranged on current leads 5 and 6, forming symmetrical loops of one another with respect to a plane orthogonal to the plan of Figures 1 to 3, and capable of cooperating with a pair of movable contacts 7 and 8 carried at the ends of a rigid bridge 9. The shapes of the current leads 5 and 6 and of the rigid bridge 9 are chosen so that, known way, repulsive forces Significant ions arise there, when very high currents pass between contacts 3 and 7, on the one hand, and 4 and 8, on the other. Contacts 3 to 8 are arranged in the lower part 2a of each compartment 2, forming an interrupting chamber and arranged accordingly, in known manner.

Dans la partie supérieure médiane de chaque compartiment 2 est prévu un puits 10, dans lequel un coulisseau 11 peut coulisser parallèlement aux sens d'ouverture et de fermeture du pont de contact rigide 9 auquel il est relié de la façon décrite ci-après. La partie supérieure périphérique 2b de chaque compartiment 2 est séparée de l'intérieur du puits 10 par les parois de celui-ci et de la chambre de coupure 2a par des grilles 12. Cette partie 2b forme chambre de détente.In the middle upper part of each compartment 2 is provided a well 10, in which a slide 11 can slide parallel to the opening and closing directions of the rigid contact bridge 9 to which it is connected in the manner described below. The peripheral upper part 2b of each compartment 2 is separated from the inside of the well 10 by the walls of the latter and from the breaking chamber 2a by grids 12. This part 2b forms an expansion chamber.

Les différentes amenées de courant 5 sont reliées à des bornes de connexion correspondantes 13, disposées dans des compartiments 14 du boîtier 1. Les différentes amenées de courant 6 sont reliées à un déclencheur 15 à seuil de courant destiné à protéger, de façon connue, le circuit électrique contre les surcharges-thermiques et magnétiques. Ce déclencheur est logé dans un compartiment isolé du boîtier 1 et il actionne une tige coulissante 16 pénétrant dans un autre compartiment isolé 17 du boîtier 1, dans lequel est logé le mécanisme d'actionnement normal 18 du disjoncteur-limiteur de courant. Le mécanisme d'actionnement 18 est du type tumbler à biellettes et ressort et dont la serrure 19 est susceptible d'être commandée par le déclencheur 15 au moyen de la tige coulissante 16.Le mécanisme d'actionnement 18 est susceptible d'être actionné par un levier de manoeuvre 20, accessible de l'extérieur.The different current leads 5 are connected to corresponding connection terminals 13, arranged in compartments 14 of the housing 1. The different current leads 6 are connected to a trigger 15 with current threshold intended to protect, in known manner, the electrical circuit against thermal and magnetic overloads. This trip unit is housed in an isolated compartment of the housing 1 and it actuates a sliding rod 16 penetrating into another isolated compartment 17 of the housing 1, in which is housed the normal actuation mechanism 18 of the current limiting circuit breaker. The actuating mechanism 18 is of the tumbler type with rods and spring and whose lock 19 is capable of being controlled by the trigger 15 by means of the sliding rod 16. The actuating mechanism 18 is capable of being actuated by an operating lever 20, accessible from the outside.

Par ailleurs, les coulisseaux 11 sont rendus solidaires les uns des autres par des axes transversaux 35 et l'ensemble desdits coulisseaux 11 est attelé au mécanisme d'actionnement 18 par un levier basculant 21.Furthermore, the slides 11 are made integral with each other by transverse axes 35 and all of said slides 11 are coupled to the actuation mechanism 18 by a rocking lever 21.

En outre, sur les amenées de courant 5 et 6 sont prévues des pièces magnétisables 22 et 23, fixées sur celles-ci, et en regard desquelles sont disposées des armatures magnétiques 24 et 25, solidaires d'un barreau 26, libre de se déplacer parallèlement au sens d'ouverture et de fermeture du pont de contact 9. Celui-ci comporte une saillie 27, passant entre les amenées de courant 5 et 6 et susceptible de coopérer avec le barreau 26.In addition, on the current leads 5 and 6 are provided magnetizable parts 22 and 23, fixed thereon, and opposite which are arranged magnetic plates 24 and 25, integral with a bar 26, free to move parallel to the opening and closing directions of the contact bridge 9. The latter has a projection 27, passing between the current leads 5 and 6 and capable of cooperating with the bar 26.

Sur la figure 1, le disjoncteur-limiteur de courant selon l'invention est en position de fermeture de circuit : dans ce cas, le levier de manoeuvre est dans sa position extrême droite, tandis que les coulisseaux 11 sont dans leur position basse extrême et que la tige 16 reste éloignée de la serrure 19.In FIG. 1, the current limiting circuit breaker according to the invention is in the closed circuit position: in this case, the operating lever is in its extreme right position, while the sliders 11 are in their extreme low position and that the rod 16 remains distant from the lock 19.

Pour ouvrir le circuit, il suffit d'actionner manuellement le levier de manoeuvre 20 en le faisant pivoter vers la gauche de la figure 1 (Flèche F1).Le mécanisme tumbler 18 fait alors basculer brusquement le levier 21, qui tire l'ensemble des coulisseaux 11 vers le haut, de sorte que les contacts mobiles 7 et 8 sont séparés des contacts fixes 3 et 4 correspondants. Le disjoncteur - limiteur de courant prend alors l'état montré par la figure 3.To open the circuit, it suffices to manually actuate the operating lever 20 by pivoting it to the left in FIG. 1 (Arrow F 1 ). The tumbler mechanism 18 then suddenly switches the lever 21, which pulls the assembly slides 11 upwards, so that the movable contacts 7 and 8 are separated from the corresponding fixed contacts 3 and 4. The circuit breaker - current limiter then takes the state shown in Figure 3.

L'ouverture des contacts peut également se faire sous l'action du déclencheur 15. Dans le cas d'une surcharge thermique et magnétique, la tige 16 agit sur la serrure 19 (voir la figure 2) de sorte que le mécanisme 18 bascule partiellement dans le sens de la flèche F1.The opening of the contacts can also be done under the action of the trigger 15. In the case of a thermal and magnetic overload, the rod 16 acts on the lock 19 (see FIG. 2) so that the mechanism 18 switches partially in the direction of the arrow F 1 .

Lorsque le disjoncteur-limiteur de courant est dans l'état de la figure 2, il suffit, pour réaccrocher la serrure 19, d'actionner le levier 30 dans le sens de la flèche F1, puis d'actionner ledit levier dans le sens de la flèche F2 pour effectuer la refermeture des pôles.When the current limiting circuit breaker is in the state of FIG. 2, it suffices, to re-hang the lock 19, to actuate the lever 30 in the direction of the arrow F 1 , then to actuate said lever in the direction arrow F 2 to close the poles.

De même, lorsqu'il est dans l'état de la figure 3, c'est-à-dire après manoeuvre manuelle d'ouverture, l'actionnement du levier directement dans le sens de la flèche F2 provoque comme précédemment la refermeture des contacts.Similarly, when it is in the state of FIG. 3, that is to say after manual opening maneuver, the actuation of the lever directly in the direction of the arrow F 2 causes, as before, the reclosing of the contacts.

Ainsi, le disjoncteur-limiteur de courant peut être actionné soit manuellement, soit par le déclencheur 15. Grâce à la liaison entre les ponts de contact 9 et les coulisseaux 11, décrite ci-après, le déclenchement automatique par le déclencheur 15 est accéléré en cas de passade d'une trop grande intensité.Thus, the current limiting circuit breaker can be actuated either manually or by the trigger 15. Thanks to the connection between the contact bridges 9 and the slides 11, described below, the automatic triggering by the trigger 15 is accelerated by case of a passade of too great intensity.

Comme le montrent les figures 4 à 7, chaque coulisseau 11 comporte un fourreau 28, à l'intérieur duquel peut coulisser une tige creuse 29 solidaire du pont de contact 9, le coulissement se faisant parallèlement à l'ouverture et à la fermeture de celui-ci. A l'intérieur de la tige creuse 29 est prévu un ressort 30, pressant, dans le sens de leur écartement, deux biellettes croisées 31 et 32, qui sont articulées autour d'un axe 33 et dont les extrémités 36 et 37 en regard sont arrondies et sont en appui sur l'extrémité libre du ressort 30 par l'intermédiaire d'un disque 38.As shown in Figures 4 to 7, each slide 11 has a sleeve 28, inside which can slide a hollow rod 29 integral with the contact bridge 9, the sliding being done parallel to the opening and closing of that -this. Inside the hollow rod 29 is provided a spring 30, pressing, in the direction of their spacing, two crossed rods 31 and 32, which are articulated around an axis 33 and whose ends 36 and 37 opposite are rounded and bear on the free end of the spring 30 by means of a disc 38.

Les extrémités libres 39 et 40 des biellettes 31 et 32, opposées au ressort 30, sont susceptibles de prendre appui sur les rebords dirigés vers elles, d'un étrier 34 disposé au fond du fourreau 28.The free ends 39 and 40 of the links 31 and 32, opposite the spring 30, are capable of bearing on the flanges directed towards them, of a stirrup 34 placed at the bottom of the sheath 28.

Lorsque le circuit est fermé (voir les figures 1 à 4), les coulisseaux 11 sont dans leur position extrême basse et la pression de contact est transmise par la coopération des biellettes 31 et 32, de l'étrier 34 et du ressort 30. Dans cette position, les extrémités 39 et 40 des biellettes 31 et 32 sont écartées l'une de l'autre sous l'action du ressort 30 et sont ancrées sous les rebords de l'étrier 34.When the circuit is closed (see FIGS. 1 to 4), the slides 11 are in their extreme low position and the contact pressure is transmitted by the cooperation of the rods 31 and 32, of the caliper 34 and of the spring 30. In this position, the ends 39 and 40 of the links 31 and 32 are spaced from one another under the action of the spring 30 and are anchored under the edges of the stirrup 34.

Si une surintensité importante se produit, des forces de répulsion prennent naissance dans la boucle formée par les contacts fixes 3,4 et mobiles 7,8 de sorte que le pont de contact 9 a tendance à s'écarter des contacts fixes-3'et 4. Ce mouvement de séparation est favorisé par la poussée du barreau 26 sur le prolongement 27, due à l'attraction des armatures magnétiques 24 et 25 par les pièces magnétiques 22 et 23. Dans ces conditions, le fourreau 11 restant en position extrême basse, puisque chargé par le mécanisme 18, la tige creuse 29 remonte dans le fourreau 28, ce qui oblige les biellettes 31 et 32 à se refermer (voir la figure 5). La tige creuse 29 continuant sa remontée, les extrémités 39 et 40 des biellettes 31 et 32 échappent aux rebords de l'étrier 34, ce qui provoque la montée brusque de la tige 29 et du pont de contact 9 et donc l'ouverture tout aussi brusque du circuit électrique (voir la figure 6). A ce moment, les coulisseaux 11 sont toujours en position basse extrême.If a significant overcurrent occurs, repulsion forces arise in the loop formed by the fixed contacts 3,4 and movable 7,8 so that the contact bridge 9 tends to move away from the fixed contacts-3 ' and 4. This separation movement is favored by the push of the bar 26 on the extension 27, due to the attraction of the magnetic armatures 24 and 25 by the magnetic pieces 22 and 23. Under these conditions, the sheath 11 remaining in the extreme low position , since loaded by the mechanism 18, the hollow rod 29 rises in the sheath 28, which forces the rods 31 and 32 to close (see Figure 5). The hollow rod 29 continuing its ascent, the ends 39 and 40 of the rods 31 and 32 escape the edges of the stirrup 34, which causes the sudden rise of the rod 29 and the contact bridge 9 and therefore the opening just as abrupt electrical circuit (see Figure 6). At this time, the slides 11 are still in the extreme low position.

A partir de la position de la figure 6, le déclencheur 15 qui a un fonctionnement très lent par rapport au processus expliqué ci-dessus, actionne la serrure 19 du mécanisme 18, pour que celui-ci bascule pour prendre la position de la figure 2. Par suite les coulisseaux 11 remontent dans les puits 10. Les bords de ceux-ci bloquant la remontée du pont de contact 9, les coulisseaux 11 et les tiges 29 correspondantes peuvent reprendre les mêmes positions relatives que montrées sur la figure 4, de sorte que les extrémités 39 et 40 des biellettes 31 et 32 peuvent de nouveau venir s'ancrer derrière le rebord de l'étrier 34. Le dispositif intermédiaire selon l'invention est donc réarmé et est prêt à être ramené dans l'état des figures 1 à 4, par simple commande volontaire du levier manuel 20 dans le sens de la flèche F , puis dans celui de la flèche F2 (voir la figure 7).From the position of Figure 6, the trigger 15, which operates very slowly compared to the process explained above, actuates the lock 19 of the mechanism 18, so that the latter rocks to take the position of FIG. 2. As a result, the slides 11 go back into the wells 10. The edges of these blocking the ascent of the contact bridge 9, the slides 11 and the corresponding rods 29 can assume the same relative positions as shown in FIG. 4, so that the ends 39 and 40 of the links 31 and 32 can again come to anchor behind the edge of the stirrup 34. The intermediate device according to the invention is therefore reset and is ready to be brought back to the state of FIGS. 1 to 4, by simple voluntary control of the manual lever 20 in the direction of arrow F, then in that of arrow F 2 (see Figure 7).

Claims (8)

1. Appareil de coupure de courant électrique, du type limiteur d'intensité, comportant, d'une part, au moins une paire de contacts fixes 5,6 qui sont susceptibles d'être reliés par un pont de contact 9 mobile entre une position d'ouverture et une position de fermeture et vice-versa et qui sont conformés de façon à exercer sur ledit pont des forces de répulsion électrondyna- miques tendant à repousser ledit pont vers sa position d'ouverture lorsque lesdits contacts fixes et le pont mobile sont parcourus par un courant dont l'intensité est supérieure à un seuil déterminé, et d'autre part, un mécanisme à accumulation d'énergie 18 susceptible d'actionner ledit pont 9 entre ses positions d'ouverture et de fermeture et d'être commandé par un déclencheur de protection, tandis qu'un dispositif mécanique à échappement destiné à réaliser une liaison mécanique partiellement indépendante, est prévu entre ledit pont de contact mobile 9 et le mécanisme d'actionnement 18, caractérisé en ce que le dispositif mécanique à échappement comporte un coulisseau 11 mobile sous l'action du mécanisme d'actionnement 18, entre deux positions extrêmes correspondant respectivement aux positions d'ouverture et de fermeture du pont de contact mobile 9, ledit coulisseau 11 étant creux et formant un fourreau 28 qui enferme un système d'accrochage 31,32 à expansion transversale élastique susceptible de s'accrocher spontanément derrière au moins un élément d'accrochage 34 solidaire dudit fourreau 28,la rétraction transversale dudit système d'accrochage étant commandée par un organe 29 solidaire dudit pont de contact mobile 9, lorsque celui-ci est repoussé par les forces électrodynamiques.1. An electric current cut-off device, of the current limiting type, comprising, on the one hand, at least one pair of fixed contacts 5,6 which are capable of being connected by a contact bridge 9 movable between a position opening and a closed position and vice versa and which are shaped so as to exert on said bridge electrodynamic repulsion forces tending to push said bridge towards its open position when said fixed contacts and the movable bridge are traversed by a current whose intensity is greater than a determined threshold, and on the other hand, an energy accumulation mechanism 18 capable of actuating said bridge 9 between its open and closed positions and being controlled by a protection release, while a mechanical escapement device intended to make a partially independent mechanical connection is provided between said movable contact bridge 9 and the actuation mechanism 18, characterized in that the dis positive mechanical escapement comprises a slide 11 movable under the action of the actuating mechanism 18, between two extreme positions corresponding respectively to the open and closed positions of the movable contact bridge 9, said slide 11 being hollow and forming a sheath 28 which encloses an attachment system 31.32 with elastic transverse expansion capable of spontaneously hooking behind at least one attachment element 34 secured to said sheath 28, the transverse retraction of said attachment system being controlled by a member 29 secured of said movable contact bridge 9, when the latter is repelled by electrodynamic forces. 2 - Appareil selon la revendication 1, caractérisé en ce que l'élément d'accrochage 34 solidaire du fourreau 28 est disposé dans une partie intermédiaire de celui-ci et le coulisseau 11 se déplace dans un puits 10, de sorte que, lorsque le déclencheur déplace le fourreau 28 de sa position extrême de fermeture à sa position extrême d'ouverture après répulsion du pont mobile, ledit fourreau 28 coulisse par rapport au système d'accrochage 31,32 qui est retenu en position par la coopération du pont de contact mobile 9 avec le bord des puits 10 et qui, à un moment, peut se dilater transversalement pour recoopérer avec ledit élément d'accrochage 34.2 - Apparatus according to claim 1, characterized in that the hooking element 34 integral with the sleeve 28 is disposed in an intermediate part thereof and the slide 11 moves in a well 10, so that, when the trip device moves the sleeve 28 from its extreme closed position to its extreme open position after repulsion of the movable bridge, said sleeve 28 slides relative to the hooking system 31,32 which is retained in position by the cooperation of the contact bridge movable 9 with the edge of the wells 10 and which, at a moment, can expand transversely to co-operate with said attachment element 34. 3 - Appareil selon l'une des revendications 1 ou 2, caractérisé en ce qu'on prévoit des moyens magnétisables 22,23 traversés par le courant à couper et susceptibles d'attirer, en cas de surintensité importante, un corps 26 libre de se déplacer parallèlement au coulisseau 11,qui vient alors au contact du pont de contact mobile 9 pour agir sur celui-ci dans le même sens que lesdites forces de répulsion.3 - Apparatus according to one of claims 1 or 2, characterized in that there is provided magnetizable means 22,23 crossed by the current to be cut and capable of attracting, in the event of significant overcurrent, a body 26 free to move parallel to the slide 11, which then comes into contact with the movable contact bridge 9 to act on it in the same direction as said repulsion forces. 4 - Appareil selon l'une des revendications 1 à 3, caractérisé en ce que le système d'accrochage est constitué de deux biellettes croisées 31,32, articulées entre elles et en appui sur un ressort 30 qui est logé dans une tige creuse 29 solidaire du pont de contact mobile 9 et dont l'action tend à écarter l'une de l'autre les extrémités 39,40 desdites biellettes opposées audit ressort.4 - Apparatus according to one of claims 1 to 3, characterized in that the attachment system consists of two crossed rods 31,32, hinged together and supported on a spring 30 which is housed in a hollow rod 29 secured to the movable contact bridge 9 and whose action tends to separate the ends 39, 40 of said rods opposite said spring from one another. 5- Appareil selon l'une des revendications 1 à 4, comportant plusieurs paires de contacts fixes et autant de ponts de contact mobiles, caractérisé en ce que les différents coulisseaux 11 sont rendus solidaires les uns des autres par un attelage 35.5- Apparatus according to one of claims 1 to 4, comprising several pairs of fixed contacts and as many movable contact bridges, characterized in that the different sliders 11 are made integral with each other by a coupling 35. 6. Appareil selon l'une des revendications 1 à 5, caractérisé en ce que chaque paire de contacts fixes 5,6 , le pont de contact mobile 9 et le coulisseau 11 correspondant sont disposés dans un compartiment indépendant 2 du boîtier de l'appareil.6. Apparatus according to one of claims 1 to 5, characterized in that each pair of fixed contacts 5,6, the movable contact bridge 9 and the corresponding slide 11 are arranged in an independent compartment 2 of the housing of the apparatus . 7 - Appareil selon la revendication 6, caractérisé en ce que le compartiment indépendant 2 est subdivisé en une chambre de coupure 2a où se trouvent les contacts fixes 5,6 et le pont de contact mobile 9, un puits 10 dans lequel coulisse le coulisseau 11 et une chambre de détente 2b séparée de la chambre de coupure 2a par une ou plusieurs grilles 12 s'étendant entre les parois extérieures du puits 10 et les parois intérieures du compartiment 2.7 - Apparatus according to claim 6, characterized in that the independent compartment 2 is subdivided into a breaking chamber 2a where the fixed contacts 5,6 and the movable contact bridge 9 are located, a well 10 in which slides the slide 11 and an expansion chamber 2b separated from the breaking chamber 2a by one or more grids 12 extending between the exterior walls of the well 10 and the interior walls of the compartment 2. 8 - Appareil selon l'une des revendications 1 à 7, caractérisé en ce que le mécanisme d'actionnement 18 est disposé dans un compartiment 17 du boîtier isolé des compartiments 2 dans lesquels se trouvent les contacts fixes 5,6 et les ponts de contact mobiles 9.8 - Apparatus according to one of claims 1 to 7, characterized in that the actuating mechanism 18 is disposed in a compartment 17 of the housing isolated from the compartments 2 in which are the fixed contacts 5,6 and the contact bridges mobiles 9.
EP80400734A 1979-06-07 1980-05-27 Electric current interrupting apparatus of the current limiting type Withdrawn EP0021882A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7914559A FR2458887A1 (en) 1979-06-07 1979-06-07 ELECTRIC CURRENT CUTTING APPARATUS OF THE INTENSITY LIMITING TYPE
FR7914559 1979-06-07

Publications (1)

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EP0021882A1 true EP0021882A1 (en) 1981-01-07

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EP80400734A Withdrawn EP0021882A1 (en) 1979-06-07 1980-05-27 Electric current interrupting apparatus of the current limiting type

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EP (1) EP0021882A1 (en)
ES (1) ES8103467A1 (en)
FR (1) FR2458887A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030872A2 (en) * 1979-12-17 1981-06-24 Gould Inc. Current-limiting circuit breaker adapter
EP0199668A2 (en) * 1985-04-01 1986-10-29 Siemens Aktiengesellschaft Current limiting switch unit with a contact bridge assembly
EP0398461A2 (en) * 1989-05-18 1990-11-22 Siemens Aktiengesellschaft Circuit breaker with an actuating and a locking device for a moving contact
EP0410258A2 (en) * 1989-07-26 1991-01-30 Siemens Aktiengesellschaft Electromechanic high-speed breaker
FR2785085A1 (en) * 1998-10-22 2000-04-28 Gen Electric ARTICULATING FOLDING CONTACT ARM DRIVE DEVICE FOR CIRCUIT BREAKER CONTROL MECHANISM, AND CIRCUIT BREAKER COMPRISING SUCH A DEVICE
GB2611551A (en) * 2021-10-07 2023-04-12 Eaton Intelligent Power Ltd Switching device and method for operating a switching device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189134A (en) * 1984-03-09 1985-09-26 寺崎電気産業株式会社 Circuit breaker

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Publication number Priority date Publication date Assignee Title
FR678144A (en) * 1928-10-30 1930-03-19 Blown arc electrical contactor device
FR2124380A1 (en) * 1971-02-02 1972-09-22 Sace Spa Costruzioni Ele
FR2210817A1 (en) * 1972-12-15 1974-07-12 Bbc Brown Boveri & Cie
FR2237302A2 (en) * 1972-05-26 1975-02-07 Merlin Gerin
FR2397712A1 (en) * 1977-07-13 1979-02-09 Telemecanique Electrique Resettable current limiting cut=out - is for multi-operation use and is based on compression spring driver contact bridge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR678144A (en) * 1928-10-30 1930-03-19 Blown arc electrical contactor device
FR2124380A1 (en) * 1971-02-02 1972-09-22 Sace Spa Costruzioni Ele
FR2237302A2 (en) * 1972-05-26 1975-02-07 Merlin Gerin
FR2210817A1 (en) * 1972-12-15 1974-07-12 Bbc Brown Boveri & Cie
FR2397712A1 (en) * 1977-07-13 1979-02-09 Telemecanique Electrique Resettable current limiting cut=out - is for multi-operation use and is based on compression spring driver contact bridge

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030872A2 (en) * 1979-12-17 1981-06-24 Gould Inc. Current-limiting circuit breaker adapter
EP0030872A3 (en) * 1979-12-17 1982-03-17 Gould Inc. Current-limiting circuit breaker adapter
EP0199668A2 (en) * 1985-04-01 1986-10-29 Siemens Aktiengesellschaft Current limiting switch unit with a contact bridge assembly
EP0199668A3 (en) * 1985-04-01 1988-06-01 Siemens Aktiengesellschaft Berlin Und Munchen Current limiting switch unit with a contact bridge assembly
EP0398461A2 (en) * 1989-05-18 1990-11-22 Siemens Aktiengesellschaft Circuit breaker with an actuating and a locking device for a moving contact
EP0398461A3 (en) * 1989-05-18 1992-02-26 Siemens Aktiengesellschaft Circuit breaker with an actuating and a locking device for a moving contact
EP0410258A2 (en) * 1989-07-26 1991-01-30 Siemens Aktiengesellschaft Electromechanic high-speed breaker
EP0410258A3 (en) * 1989-07-26 1992-01-02 Siemens Aktiengesellschaft Electromechanic high-speed breaker
FR2785085A1 (en) * 1998-10-22 2000-04-28 Gen Electric ARTICULATING FOLDING CONTACT ARM DRIVE DEVICE FOR CIRCUIT BREAKER CONTROL MECHANISM, AND CIRCUIT BREAKER COMPRISING SUCH A DEVICE
DE19951042B4 (en) * 1998-10-22 2009-08-13 General Electric Co. Breaker actuation mechanism with foldable contact arm connector assembly
GB2611551A (en) * 2021-10-07 2023-04-12 Eaton Intelligent Power Ltd Switching device and method for operating a switching device

Also Published As

Publication number Publication date
ES492609A0 (en) 1981-02-16
ES8103467A1 (en) 1981-02-16
FR2458887A1 (en) 1981-01-02

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