EP0074288A1 - Automatic limitation device for short circuit currents - Google Patents

Automatic limitation device for short circuit currents Download PDF

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Publication number
EP0074288A1
EP0074288A1 EP82401380A EP82401380A EP0074288A1 EP 0074288 A1 EP0074288 A1 EP 0074288A1 EP 82401380 A EP82401380 A EP 82401380A EP 82401380 A EP82401380 A EP 82401380A EP 0074288 A1 EP0074288 A1 EP 0074288A1
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EP
European Patent Office
Prior art keywords
levers
screen
housing
contact
switch device
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
EP82401380A
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German (de)
French (fr)
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EP0074288B1 (en
Inventor
Elie Belbel
Louis Fechant
André Haury
Michel Lauraire
Lucien Siffroi
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Telemecanique SA
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Telemecanique Electrique SA
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Application filed by Telemecanique Electrique SA filed Critical Telemecanique Electrique SA
Priority to AT82401380T priority Critical patent/ATE13106T1/en
Publication of EP0074288A1 publication Critical patent/EP0074288A1/en
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    • 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
    • H01H9/32—Insulating body insertable between contacts

Definitions

  • the invention relates to a limiting switch device comprising, on the one hand, two movable contacts each placed at the end of a contact carrier lever which oscillates around a pivot and which is subjected to the action of a return spring, the respective arms of these two levers being placed in the same plane of rotation and being arranged substantially parallel one opposite the other when the device is closed, so that repulsion forces appear when these arms are traversed by very high currents, separate these two levers in the opposite direction and comprising, on the other hand, mechanical means capable of maintaining the contacts separated from each other after the appearance of these currents.
  • Such limiting switch devices are advantageously used in association with circuit breakers to ensure the protection of the lines which supply current-consuming devices, in particular when short-circuits appear.
  • circuit breakers generally have a relatively complicated structure which is partly due to the complexity of the fastening members used to automatically keep the circuit breaker open, and partly due to that of manual resetting devices.
  • the invention therefore proposes to. providing a current limiting device whose general structure corresponds to a known arrangement which has given complete satisfaction, but in which particular measures will be taken to overcome the drawbacks of the known art, mentioned above; the invention aims in particular to provide a limiter device in which the two contacts will be kept apart and will be galvanically isolated from each other as soon as a very small spacing appears between them, thus allowing it to be placed in series with a device contactor.
  • this result is achieved thanks to the fact that a thin insulating screen placed between the arms of the contact-carrying levers and capable of moving in a plane substantially perpendicular to the plane of rotation common to these levers is, of a on the other hand, subjected to the action of at least one elastic member which tends to project it between the two contact pads and that, on the other hand, this screen is held in a position army, where this elastic member is comprised of at least one abutment surface belonging to at least one of the contact levers.
  • a limiting device presented, for example, in the form of a unipolar box 1 in FIG. 1 and constituted, for example, by the association of two half-boxes 3, 4 symmetrical with respect to the plane of the figure, comprises mainly a first interior volume 5 placed in a lower region 6 of the housing and a second interior volume 7 placed in an upper region 8 of the housing.
  • the lower region of the housing has an outer base surface preferably used for fixing the device 15 and two opposite lateral extensions 9, 10 which each receive a conductor 11 respectively 12 for the electrical connection of the device, which can be carried out, either by means of a connection pad 13 of this conductor represented on the right of the figure, or by means of connection devices making use of a screw 14 and a socket 14 'extending beyond the base .
  • the second lower volume 5 receives two contact levers 16 and 17 each having a first end 18 respectively 19, pivoted around a pivot 20 respectively 21. These two pivots have axes parallel and perpendicular to a median plane PP 'in which can swing the levers and are placed near the base 15.
  • This plane PP 'advantageously represents the joint plane of the two half-housings 3, 4, see FIG. 2.
  • Each first end 18, 19 of the lever is connected to a connection conductor by a metal braid, or equivalent deformable conductor 22 respectively 23, of which a first portion 24 respectively 25, circulates substantially parallel to the base.
  • the first ends 18, 19 are placed in the vicinity of the pivots so that the movements of the contact levers cause only a slight deformation of the second portions 26, 27 of these metal braids, which are themselves substantially perpendicular to the base 15 , and are connected to parts 11, 13.
  • Contact pads 28, 29 are placed at the second ends 30 respectively 31 of the arms of the levers which are opposite to those receiving the braids. These arms are arranged substantially parallel to each other and facing each other, perpendicular to the base 15.
  • Two contact pressure springs 38 respectively 39 extending substantially around a common axis XX ', parallel to the base 15 and placed in the median plane, bear, on the one hand, on a boss and, on the other hand, on a side wall 40 respectively 41 of the housing; These two walls are substantially parallel to the arms of the levers and are substantially parallel to a plane RR 'of the housing which is perpendicular to the base and which symmetrically separates the two pivots and the two levers.
  • the spring 39 is optionally supported on the adjoining wall 41. by virtue of an adjustment piece 42.
  • An arc chamber 43 placed in the second interior volume 7 , comprises a multiplicity of forked fins 44, preferably arranged radially towards the contacts, so as to receive and split an arc appearing between the ends of the levers during of a cut.
  • These fins can be maintained either by shaped surfaces coming from molding with the insulating half-housings 3, 4, or be arranged inside a separate arc box placed inside the first volume'7.
  • the springs 38, 39 can also be either guided in half-housings 46, 47 half-housings, or be placed in guide bushings 46 ', 47' pinched between the half-housings and having these housings.
  • two magnetic parts 50 respectively 51 are arranged, each taking the shape of a U, the branches 52, 53 respectively 54, 55 of which surround at least partially the arms of the levers, see Figures 1, 2 and 3; These magnetic parts are held in relief or hollow shapes carried by the half-housings.
  • the contact pads 28., 29 each have a transverse edge 56 respectively 57, placed on the side of the corresponding pivot, these two edges being substantially oriented in the extension of one another, see FIG. 4.
  • a screen 32 is arranged which takes the form of a thin rectangular plate "e” made of insulating material, see also Figures 2 and 3.
  • This screen whose own plane is placed in the RR 'plane, can move in this plane either thanks to two opposite and parallel lateral edges 58, 59 which are guided in two opposite guide grooves 60, 61 forming baffles which separate the two levers 16, 17 and carried respectively by an internal surface of each half housing, see Figure 3, or in an appropriate guide interval, see Figure 6 described later.
  • An upper edge 33 of this screen is placed against at least one, and possibly the two transverse edges 56, 57 of the contact pads constituting movable stops, and is held in this position by means of two armed compression springs 63, 64 of parallel axes which are applied, on the one hand, to a bottom 65 of the housing carrying the base 15 and, on the other hand, to two support points 66, 67 of the screen, opposite the upper edge 33 and neighbors of the lateral guide edges 58, 59.
  • the two guide grooves extend sufficiently towards the arc chamber, so that the insulating screen can move under the effect of the springs and reach a position further from the bottom where the upper edge reaches point A, see figure. 1.
  • this circuit breaker results from the fact that when repulsion forces, which are applied to the arms of the levers and whose efficiency is improved by the magnetizable parts, separate the levers by an amount slightly greater than the thickness "e ", the insulating screen 32 escapes the rim 56, 57 and is very quickly propelled between the contact pads.
  • the passage of this screen produces not only a stretching of the arc, which arises between the pellets, towards the fins, but also the interposition of an obstacle which prevents the pellets from coming into contact immediately after their separation, and which then operates a partial isolation of two symmetrical half-chambers 43 ′, 43 "which together form the entire chamber 43.
  • two fins 68, 69, longer than the others, can be placed on either side of point A, and in the immediate vicinity of this point.
  • the screen may include an extension 70 directed towards the bottom or base of the housing, or have a lower edge sufficiently distant from '33 to avoid striking an arc between the lower ends of the levers, this extension being placed for example opposite the transverse rib 72 to form a baffle.
  • the two springs must therefore have, different characteristics so that this support on 45 is carried out in all cases;
  • the spring 38 exerts on the lever 16 when the latter is at rest, a force directed from left to right, which is greater than the force which is exerted by the spring 39 in the opposite direction on the lever 17 when contact 29 is pressed on contact 28.
  • the rearming of the device which aims to move the screen from the position corresponding to that where the upper edge 33 is in A to the position shown in Figure 1, is performed using a flat pusher 78 of thin, see Figure 5.
  • This pusher which is placed like the screen 32 in the plane RR 'slides downward thanks to two grooves 79, 80 belonging to the housing which guides its parallel edges 81, 82 when its upper end 83 passing through an opening 84 'of the roof 84 is subjected to an appropriate maneuver.
  • This pusher which is maintained in the high position visible in FIG.
  • the lower region 78 'of this pusher has a notch 78 "which also allows it not to prevent the contacts from being closed when the pusher is in the low position indicated in dotted lines in FIG. 5.
  • the housing of the unipolar device can advantageously be presented in an elementary form containing only the elements necessary for cutting a phase conductor, so that several elementary housings can be associated side by side when it is necessary to carry out the protection of a polyphase line, see Figure 3, for example using coupling rods 93, passing through the various housings 94, 95, 96.
  • the screen was advantageously pressed on them so that its release is immediate.
  • the guide grooves 60, 61 of the screen, the rib 72 and the abutment surface 45 of the contact lever 16 can advantageously be carried by an insulating molded part represented at 100 in FIG. 6 and placed in the first interior volume. 5 between the half-housings at the time of assembly.
  • This part 100 here comprises a single groove or guide interval 101 for the screen 32, which is placed in the plane R R 'and which leads to two parallel cylindrical housings 102, 103, intended to receive the springs 63, 64; this groove 101 is limited by walls 104, 105, substantially parallel to the plane RR ', one of which carries the abutment surface 106 corresponding to 45 and which are all those connected to two external walls 107, 108 parallel to the median plane PP '.
  • These walls which locally isolate the contact levers 16, 17 and the metal branches of the magnetic parts 50 and 51 comprise two pairs of open external housings 109, 110 and respectively 111, 112 to receive these branches and cooperate in the mechanical holding of the magnetic parts. ; two neighboring housings 110, 112, arranged on the same wall as 108, are separated by a partition such as 113 to avoid an untimely arcing between two magnetic pieces.
  • the levers 16, 17 move in two notches 114, 115 which are placed between the walls 107, 108 and which end at the walls 104, 105.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Air Bags (AREA)
  • Transmitters (AREA)

Abstract

A device is provided comprising a simple means for holding the contacts apart and insulated from each other after circuit breaking. A screen formed by an insulating plate of small thickness, is placed between two mobile contact levers and is urged by springs against flanges which are integral with the levers and which move apart when short circuit currents appear for allowing this screen to be rapidly projected between the contact inserts. This simple circuit-breaker device may be used such as it is or in association with a contactor for protecting lines which supply consumer apparatus.

Description

L'invention se rapporte à un dispositif interrupteur limiteur comprenant, d'une part, deux contacts mobiles placés chacun à l'extrémité d'un levier porte contact qui oscille autour d'un pivot et qui est soumis à l'action d'un ressort de rappel, les bras respectifs de ces deux leviers étant placés dans un même plan de rotation et étant disposés sensiblement parallèlement l'un en regard de l'autre lorsque le dispositif est fermé, de sorte que des forces de répulsion apparaissant lorsque ces bras sont parcourus par des courants très élevés, écartent ces deux leviers en sens inverse et comprenant, d'autre part, des moyens mécaniques aptes à maintenir les contacts séparés l'un de l'autre après l'apparition de ces courants.The invention relates to a limiting switch device comprising, on the one hand, two movable contacts each placed at the end of a contact carrier lever which oscillates around a pivot and which is subjected to the action of a return spring, the respective arms of these two levers being placed in the same plane of rotation and being arranged substantially parallel one opposite the other when the device is closed, so that repulsion forces appear when these arms are traversed by very high currents, separate these two levers in the opposite direction and comprising, on the other hand, mechanical means capable of maintaining the contacts separated from each other after the appearance of these currents.

De tels dispositifs interrupteurs limiteurs sont avantageusement utilisés en association avec des disjoncteurs pour assurer la protection des lignes qui alimentent des appareils consommateurs de courant notamment lors de l'apparition de courts-circuits.Such limiting switch devices are advantageously used in association with circuit breakers to ensure the protection of the lines which supply current-consuming devices, in particular when short-circuits appear.

Dans des dispositifs disjoncteurs connus, dont la constitution générale répond à celle définie ci-dessus, les moyens mécaniques qui ont pour but de maintenir les contacts séparés l'un de l'autre, ne deviennent actifs que si une course relativement importante est effectuée par au moins un des leviers.In known circuit breaker devices, the general constitution of which corresponds to that defined above, the mechanical means which have the aim of keeping the contacts separated from each other, only become active if a relatively large stroke is made by at least one of the levers.

On peut donc craindre que l'apparition de courants intenses, qui ne développent toutefois pas des forces de répulsion susceptibles de provoquer une course minimale, soit suivie d'une nouvelle fermeture des contacts, et que la résistance mécanique opposée par ces dispositifs d'accrochage ne viennent retarder l'ouverture.It is therefore to be feared that the appearance of intense currents, which however do not develop repulsive forces capable of causing a minimum stroke, will be followed by a new closure of the contacts, and that the mechanical resistance opposed by these attachment devices do not delay the opening.

De tels phénomènes sont particulièrement dangereux lorsque ces disjoncteurs sont placés en série avec des contacteurs dont les temps de réaction à une commande automatique d'ouverture sont sensiblement plus longs que ceux auxquels répondent les disjoncteurs.Such phenomena are particularly dangerous when these circuit breakers are placed in series with contactors whose reaction times to an automatic opening command are significantly longer than those to which the circuit breakers respond.

Par ailleurs, les disjoncteurs connus présentent généralement une structure relativement compliquée qui est pour partie due à la complexité des organes d'accrochage utilisés pour maintenir automatiquement le disjoncteur ouvert, et pour partie due à celle des dispositifs manuels de réarmement.Furthermore, known circuit breakers generally have a relatively complicated structure which is partly due to the complexity of the fastening members used to automatically keep the circuit breaker open, and partly due to that of manual resetting devices.

L'invention se propose par suite, de. fournir un dispositif limiteur de courant dont la structure générale correspond à une disposition connue ayant donné entière satisfaction, mais dans lequel des mesures particulières seront prises pour écarter les inconvénients de l'art connu,mentionnés ci-dessus ; l'invention vise en particulier à fournir un dispositif limiteur dans lequel les deux contacts seront maintenus écartés et seront galvaniquement isolés l'un de l'autre dès qu'un écartement très faible apparaîtra entre eux, permettant ainsi sa mise en série avec un appareil contacteur.The invention therefore proposes to. providing a current limiting device whose general structure corresponds to a known arrangement which has given complete satisfaction, but in which particular measures will be taken to overcome the drawbacks of the known art, mentioned above; the invention aims in particular to provide a limiter device in which the two contacts will be kept apart and will be galvanically isolated from each other as soon as a very small spacing appears between them, thus allowing it to be placed in series with a device contactor.

Selon l'invention, ce résultat est atteint grâce au fait qu'un écran mince isolant placé entre les bras des leviers porte- contacts et apte à se déplacer dans un plan sensiblement perpendiculaire au plan de rotation commun à ces leviers est, d'une part, soumis à l'action d'au moins un organe élastique qui tend à le projeter entre les deux pastilles de contact et que, d'autre part, cet écran est maintenu dans une position armée, où cet organe élastique est compriné par au moins une surface de butée appartenant à au moins un des leviers de contact.According to the invention, this result is achieved thanks to the fact that a thin insulating screen placed between the arms of the contact-carrying levers and capable of moving in a plane substantially perpendicular to the plane of rotation common to these levers is, of a on the other hand, subjected to the action of at least one elastic member which tends to project it between the two contact pads and that, on the other hand, this screen is held in a position army, where this elastic member is comprised of at least one abutment surface belonging to at least one of the contact levers.

On connaît déjà, par exemple, par le brevet USA 3 168 627 des dispositifs interrupteurs faisant appel à deux contacts mobiles placés chacun à l'extrémité d'un support déformable et à un écran isolant qui se déplace entre eux.Already known, for example, from US Pat. No. 3,168,627, switching devices using two movable contacts each placed at the end of a deformable support and an insulating screen which moves between them.

Dans ce dispositif connu, les mouvements de l'écran sont provoqués par une bobine et par un ressort de compression de façon à fonctionner comme un interrupteur télécommandé, tandis qu'en raison des liaisons établies entre cet écran et ces supports de contacts, un fonctionnement en interrupteur-limiteur est totalement exclu.In this known device, the movements of the screen are caused by a coil and by a compression spring so as to function as a remote-controlled switch, while due to the connections established between this screen and these contact supports, an operation in switch-limiter is totally excluded.

L'invention sera mieux comprise à la lecture de la description ci-après.The invention will be better understood on reading the description below.

Aux dessins annexés

  • La figure 1 illustre une vue en élévation en coupe par un plan médian PP' contenant les leviers de contacts ;
  • La figure 2 représente une vue de dessus de l'appareil selon la figure 1, coupé par un plan brisé V W ;
  • La figure 3 montre une vue de côté d'un appareil disjoncteur faisant appel à trois dispositifs selon la figure 1, associés et coupés chacun par des plans RR', SS' et TT';
  • La figure 4 montre en élévation un détail des leviers dans leurs régions de contact ;
  • La figure 5 illustre un organe de réarmement simple, dans une vue de côté passant par le plan RR' ;
  • La figure 6 représente en perspective une pièce rapportée apte à guider l'écran et les ressorts ; et
  • La figure 7 montre une variante de réalisation de l'écran et des leviers en élévation.
To the accompanying drawings
  • FIG. 1 illustrates an elevation view in section through a median plane PP 'containing the contact levers;
  • 2 shows a top view of the device according to Figure 1, cut by a broken plane VW;
  • Figure 3 shows a side view of a circuit breaker device using three devices according to Figure 1, associated and cut each by planes RR ', SS' and TT ';
  • Figure 4 shows in elevation a detail of the levers in their contact regions;
  • FIG. 5 illustrates a simple reset member, in a side view passing through the plane RR ';
  • Figure 6 shows in perspective an insert capable of guiding the screen and the springs; and
  • Figure 7 shows an alternative embodiment of the screen and the levers in elevation.

Un appareil limiteur présenté, par exemple, sous la forme d'un boîtier unipolaire 1 à la figure 1 et constitué, par exemple, par l'association de deux demi-boîtiers 3, 4 symétriques par rapport au plan -de la figure, comporte principalement un premier volume intérieur 5 placé dans une région inférieure 6 du boîtier et un second volume intérieur 7 placé dans une région supérieure 8 du boîtier. La région inférieure du boîtier présente une surface de base extérieure servant de préférence à la fixation de l'appareil 15 et deux prolongements latéraux 9, 10 opposés qui reçoivent chacun un conducteur 11 respectivement 12 pour le raccordement électrique de l'appareil, qui peut être effectué, soit grâce à une plage de raccordement 13 de ce conducteur représenté à droite de la figure, soit à l'aide d'organes de raccordement faisart appel à une vis 14 et à une douille 14' se prolongeant au-delà de la base. Le second volume inférieur 5 reçoit deux leviers de contact 16 et 17 ayant chacun une première extrémité 18 respectivement 19, pivotée autour d'un pivot 20 respectivement 21. Ces deux pivots ont des axes parallèles et perpendiculaires à un plan PP' médian dans lequel peuvent osciller les leviers et sont placés au voisinage de la base 15.A limiting device presented, for example, in the form of a unipolar box 1 in FIG. 1 and constituted, for example, by the association of two half-boxes 3, 4 symmetrical with respect to the plane of the figure, comprises mainly a first interior volume 5 placed in a lower region 6 of the housing and a second interior volume 7 placed in an upper region 8 of the housing. The lower region of the housing has an outer base surface preferably used for fixing the device 15 and two opposite lateral extensions 9, 10 which each receive a conductor 11 respectively 12 for the electrical connection of the device, which can be carried out, either by means of a connection pad 13 of this conductor represented on the right of the figure, or by means of connection devices making use of a screw 14 and a socket 14 'extending beyond the base . The second lower volume 5 receives two contact levers 16 and 17 each having a first end 18 respectively 19, pivoted around a pivot 20 respectively 21. These two pivots have axes parallel and perpendicular to a median plane PP 'in which can swing the levers and are placed near the base 15.

Ce plan PP' représente avantageusement le plan de joint des deux demi-boîtiers 3, 4, voir figure 2.This plane PP 'advantageously represents the joint plane of the two half-housings 3, 4, see FIG. 2.

Chaque première extrémité 18, 19 de levier est reliée à un conducteur de raccordement par une tresse métallique, ou conducteur déformable équivalent 22 respectivement 23, dont une première portion 24 respectivement 25, circule sensiblement parallèlement à la base.Each first end 18, 19 of the lever is connected to a connection conductor by a metal braid, or equivalent deformable conductor 22 respectively 23, of which a first portion 24 respectively 25, circulates substantially parallel to the base.

Les premières extrémités 18, 19 sont placées au voisinage des pivots de façon que les mouvements des leviers de contact ne provoquent qu'une légère déformation des secondes portions 26, 27 de ces tresses métalliques, qui sont elles-mêmes sensiblement perpendiculaires à la base 15, et sont reliées aux pièces 11, 13.The first ends 18, 19 are placed in the vicinity of the pivots so that the movements of the contact levers cause only a slight deformation of the second portions 26, 27 of these metal braids, which are themselves substantially perpendicular to the base 15 , and are connected to parts 11, 13.

Des pastilles de contact 28, 29 sont placées aux secondes extrémités 30 respectivement 31 des bras des leviers qui sont opposées à celles recevant les tresses. Ces bras sont disposés sensiblement parallèlement entre eux et en regard l'un de l'autre, perpendiculairement à la base 15.Contact pads 28, 29 are placed at the second ends 30 respectively 31 of the arms of the levers which are opposite to those receiving the braids. These arms are arranged substantially parallel to each other and facing each other, perpendicular to the base 15.

Les bords 34, 35 de ces extrémités qui sont opposées aux pastilles de contact, présentent chacun un bossage 36 respectivement 37.The edges 34, 35 of these ends which are opposite to the contact pads, each have a boss 36 respectively 37.

Deux ressorts de pression de contact 38 respectivement 39 s'étendant sensiblement autour d'un axe commun XX', parallèle à la base 15 et placés dans le plan médian, s'appuient, d'une part, sur un bossage et, d'autre-part, sur une paroi latérale 40 respectivement 41 du boîtier ; Ces deux parois sont sensiblement parallèles aux bras des leviers et sont sensiblement parallèles à un plan RR' du boîtier qui est perpendiculaire à la base et qui sépare symétriquement les deux pivots et les deux leviers.Two contact pressure springs 38 respectively 39 extending substantially around a common axis XX ', parallel to the base 15 and placed in the median plane, bear, on the one hand, on a boss and, on the other hand, on a side wall 40 respectively 41 of the housing; These two walls are substantially parallel to the arms of the levers and are substantially parallel to a plane RR 'of the housing which is perpendicular to the base and which symmetrically separates the two pivots and the two levers.

Le ressort 39 s'appuie éventuellement sur la paroi voisine 41. grâce à une pièce de réglage 42.The spring 39 is optionally supported on the adjoining wall 41. by virtue of an adjustment piece 42.

Ces deux ressorts appliquent donc sur les leviers des forces de pression opposées qui maintiennent les pastilles l'une contre l'autre, et de façon telle que les deux leviers prennent des positions sensiblement symétriques par rapport à un plan RR' passant entre les pivots perpendiculairement au plan PP'.These two springs therefore apply opposite pressure forces on the levers which hold the pellets against each other, and in such a way that the two levers assume positions that are substantially symmetrical with respect to a plane RR 'passing between the pivots perpendicularly PP 'plan.

Une chambre d'arc 43, placée dans le second volume intérieur 7, comporte une multiplicité d'ailettes 44 fourchues, disposées de préférence de façon rayonnante vers les contacts, de façon à recevoir et à fractionner un arc apparaissant entre les extrémités des leviers lors d'une coupure.An arc chamber 43, placed in the second interior volume 7 , comprises a multiplicity of forked fins 44, preferably arranged radially towards the contacts, so as to receive and split an arc appearing between the ends of the levers during of a cut.

Ces ailettes peuvent être maintenues soit par des surfaces de forme venant de moulage avec les demi-boîtiers isolants 3, 4, soit être disposées à l'intérieur d'un boîtier d'arc séparé placé à l'intérieur du premier volume'7.These fins can be maintained either by shaped surfaces coming from molding with the insulating half-housings 3, 4, or be arranged inside a separate arc box placed inside the first volume'7.

Les ressorts 38, 39 peuvent également être, soit guidés dans des demi-logements 46, 47 des demi-boîtiers, soit être placés dans des douilles de guidage 46', 47' pincées entre les demi-boîtiers et présentant ces logements.The springs 38, 39 can also be either guided in half-housings 46, 47 half-housings, or be placed in guide bushings 46 ', 47' pinched between the half-housings and having these housings.

Dans des zones latérales 48, 49 du premier volume intérieur 5, placées entre les tresses et les ressorts, sont disposées deux pièces magnétiques 50 respectivement 51, prenant chacune la forme d'un U, dont les branches 52, 53 respectivement 54, 55 entourent au moins partiellement les bras des leviers, voir figures 1, 2 et 3 ; Ces pièces magnétiques sont maintenues par des formes en relief ou en creux portées par les demi-boîtiers.In lateral zones 48, 49 of the first interior volume 5, placed between the braids and the springs, two magnetic parts 50 respectively 51 are arranged, each taking the shape of a U, the branches 52, 53 respectively 54, 55 of which surround at least partially the arms of the levers, see Figures 1, 2 and 3; These magnetic parts are held in relief or hollow shapes carried by the half-housings.

Les pastilles de contact 28., 29 possèdent chacune un rebord transversal 56 respectivement 57, placé du côté du pivot correspondant, ces deux rebords étant sensiblement orientés dans le prolongement l'un de l'autre, voir figure 4.The contact pads 28., 29 each have a transverse edge 56 respectively 57, placed on the side of the corresponding pivot, these two edges being substantially oriented in the extension of one another, see FIG. 4.

Dans une zone centrale 5' du premier volume 5 qui est comprise entre les leviers de contact et entre les pièces magnétiques, est disposé un écran 32 qui prend la forme d'une plaquette rectangulaire de faible épaisseur "e" en matériau isolant, voir aussi les figures 2 et 3.In a central zone 5 ′ of the first volume 5 which is between the contact levers and between the magnetic parts, a screen 32 is arranged which takes the form of a thin rectangular plate "e" made of insulating material, see also Figures 2 and 3.

Cet écran, dont le plan propre est placé dans le plan RR', peut se déplacer dans ce plan soit grâce à deux bords latéraux opposés et parallèles 58, 59 qui sont guidés dans deux rainures de guidage opposées 60, 61 formant des chicanes qui séparent les deux leviers 16, 17 et portées respectivement par une surface interne de chaque demi-boîtier, voir figure 3, soit dans un intervalle de guidage approprié, voir la figure 6 décrite ultérieurement.This screen, whose own plane is placed in the RR 'plane, can move in this plane either thanks to two opposite and parallel lateral edges 58, 59 which are guided in two opposite guide grooves 60, 61 forming baffles which separate the two levers 16, 17 and carried respectively by an internal surface of each half housing, see Figure 3, or in an appropriate guide interval, see Figure 6 described later.

Un bord supérieur 33 de cet écran est placé contre au moins un, et éventuellement les deux rebords transversaux 56, 57 des pastilles de contact constituant des butées mobiles, et est maintenu dans cette position à l'aide de deux ressorts de compression armés 63, 64 d'axes parallèles qui s'appliquent, d'une part, sur un fond 65 du boîtier portant la base 15 et, d'autre part, sur deux points d'appui 66, 67 de l'écran, opposés au bord supérieur 33 et voisins des bords latéraux de guidage 58, 59.An upper edge 33 of this screen is placed against at least one, and possibly the two transverse edges 56, 57 of the contact pads constituting movable stops, and is held in this position by means of two armed compression springs 63, 64 of parallel axes which are applied, on the one hand, to a bottom 65 of the housing carrying the base 15 and, on the other hand, to two support points 66, 67 of the screen, opposite the upper edge 33 and neighbors of the lateral guide edges 58, 59.

Les deux rainures de guidage s'étendent suffisamment vers la chambre d'arc, pour que l'écran isolant puisse se déplacer sous l'effet des ressorts et atteindre une position plus éloignée du fond où le bord supérieur atteint le point A, voir figure 1.The two guide grooves extend sufficiently towards the arc chamber, so that the insulating screen can move under the effect of the springs and reach a position further from the bottom where the upper edge reaches point A, see figure. 1.

Le fonctionnement de ce disjoncteur résulte du fait que lorsque des forces de répulsion, qui s'appliquent sur les bras des leviers et dont le rendement est amélioré par les pièces magnétisables, écartent les leviers d'une quantité légèrement supérieure à l'épaisseur "e", l'écran isolant 32 échappe au rebord 56, 57 et est très rapidement propulsé entre les pastilles de contact. Le passage de cet écran produit non seulement un étirement de l'arc, qui prend naissance entre les pastilles, vers les ailettes, mais également l'interposition d'un obstacle qui empêche les pastilles d'entrer en contact immédiatement après leur séparation, et qui opère ensuite un isolement partiel de deux demi-chambres symétriques 43', 43" formant ensemble la totalité de la chambre 43.The operation of this circuit breaker results from the fact that when repulsion forces, which are applied to the arms of the levers and whose efficiency is improved by the magnetizable parts, separate the levers by an amount slightly greater than the thickness "e ", the insulating screen 32 escapes the rim 56, 57 and is very quickly propelled between the contact pads. The passage of this screen produces not only a stretching of the arc, which arises between the pellets, towards the fins, but also the interposition of an obstacle which prevents the pellets from coming into contact immediately after their separation, and which then operates a partial isolation of two symmetrical half-chambers 43 ′, 43 "which together form the entire chamber 43.

Afin que l'arc s'accroche rapidement sur les ailettes éventuellement en contournant le bord supérieur 33 de l'écran, et se dirige rapidement vers les ailettes 44', 44" de ces demi-chambres, deux ailettes 68, 69, plus longues que les autres, peuvent être placées de part et d'autre du point A, et au voisinage immédiat de ce point.So that the arc quickly hooks onto the fins, possibly bypassing the upper edge 33 of the screen, and quickly goes towards the fins 44 ', 44 "of these half-chambers, two fins 68, 69, longer than the others, can be placed on either side of point A, and in the immediate vicinity of this point.

Par ailleurs, voir figure 3, l'écran peut comporter un prolongement 70 dirigé vers le fond ou base du boîtier, ou présenter un bord inférieur suffisamment éloigné de' 33 pour éviter l'amorçage d'un arc entre les extrémités inférieures des leviers, ce prolongement étant placé par exemple en regard de la nervure transversale 72 pour former une chicane.Furthermore, see FIG. 3, the screen may include an extension 70 directed towards the bottom or base of the housing, or have a lower edge sufficiently distant from '33 to avoid striking an arc between the lower ends of the levers, this extension being placed for example opposite the transverse rib 72 to form a baffle.

Afin que l'un des rebords au moins, par exemple, le rebord 57, d'un des leviers, par exemple le levier 16, soit placé au repos en regard de l'extrémité 33 de l'écran, ce levier est placé en appui sur une surface de butée 45 du boîtier, portée par exemple par une nervure transversale 72 isolante qui peut faire partie du boîtier ou être portée.par une pièce particu-_ lière comme on le verra ultérieurement ; cet appui est opéré par son ressort de rappel 38, la position ainsi occupée servant à déterminer également celle de l'autre levier 17 qui est soumis à l'action de son propre ressort de rappel 39. Les deux ressorts doivent présenter, par suite, des caractéristiques différentes pour que cet appui sur 45 soit réalisé dans tous les cas ; Dans un mode de réalisation préféré, le ressort 38 exerce sur le levier 16 lorsque celui-ci est au repos, une force dirigée de gauche à droite, qui est supérieure à la force qui est exercée par le ressort 39 en sens inverse sur le levier 17 quand le contact 29 est appuyé sur le contact 28.So that at least one of the edges, for example, the edge 57, of one of the levers, for example the lever 16, is placed at rest opposite the end 33 of the screen, this lever is placed in bearing on an abutment surface 45 of the housing, carried for example by an insulating transverse rib 72 which can be part of the housing or be worn by a particular piece as will be seen later; this support is operated by its return spring 38, the position thus occupied also serving to determine that of the other lever 17 which is subjected to the action of its own return spring 39. The two springs must therefore have, different characteristics so that this support on 45 is carried out in all cases; In a preferred embodiment, the spring 38 exerts on the lever 16 when the latter is at rest, a force directed from left to right, which is greater than the force which is exerted by the spring 39 in the opposite direction on the lever 17 when contact 29 is pressed on contact 28.

Lors d'une ouverture automatique, le levier 17 qui est le moins chargé, s'écartera donc plus rapidement que l'autre.During an automatic opening, the lever 17 which is the least loaded, will therefore move away more quickly than the other.

L'efficacité du dispositif interrupteur-limiteur qui vient d'être décrit tient notamment au fait que l'écran, grâce à sa légèreté, est très rapidement propulsé entre les pastilles, et que les leviers de contact sont soumis à des forces de répulsion importantes en raison de la faible distante qui peut séparer ces leviers lorsque l'écran possède-une faible épaisseur.The effectiveness of the switch-limiter device which has just been described is due in particular to the fact that the screen, thanks to its lightness, is very quickly propelled between the pellets, and that the contact levers are subjected to significant repulsive forces due to the small distance which can separate these levers when the screen has a small thickness.

Le réarmement de l'appareil, qui a pour but de déplacer l'écran depuis la position correspondant à celle où le bord supérieur 33 est en A jusqu'à la position représentée à la figure 1, est effectué grâce à un poussoir plat 78 de faible épaisseur, voir la figure 5. Ce poussoir qui est placé comme l'écran 32 dans le plan RR' coulisse vers le bas grâce à deux rainures 79, 80 appartenant au boîtier qui guide ses bords parallèles 81, 82 lorsque son extrémité supérieure 83 traversant une ouverture 84' du toit 84 est soumise à une manoeuvre appropriée. Ce poussoir qui est maintenu dans la position haute visible à la figure 5 par des moyens élastiques non représentés, se déplace également entre les ailettes 68 et 69 ; pour permettre à l'arc de s'étirer entre ces ailettes 68, 69 vers la partie supérieure de la chambre, la région inférieure 78' de ce poussoir présente une échancrure 78" qui lui permet également de ne pas empêcher la refermeture des contacts lorsque le poussoir est en position basse indiquée en pointillé sur la figure 5.The rearming of the device, which aims to move the screen from the position corresponding to that where the upper edge 33 is in A to the position shown in Figure 1, is performed using a flat pusher 78 of thin, see Figure 5. This pusher which is placed like the screen 32 in the plane RR 'slides downward thanks to two grooves 79, 80 belonging to the housing which guides its parallel edges 81, 82 when its upper end 83 passing through an opening 84 'of the roof 84 is subjected to an appropriate maneuver. This pusher which is maintained in the high position visible in FIG. 5 by elastic means not shown, also moves between the fins 68 and 69; to allow the arc to stretch between these fins 68, 69 towards the upper part of the chamber, the lower region 78 'of this pusher has a notch 78 "which also allows it not to prevent the contacts from being closed when the pusher is in the low position indicated in dotted lines in FIG. 5.

Entre les parois latérales 40, 41, le toit 84 opposé à la base 15, et les parois longitudinales 86, 87 du boîtier d'une part, et les surfaces de forme qui maintiennent les ailettes dans la chambre d'arc 43, on peut disposer un chemin d'évacuation et de laminage des gaz qui apparaissent lors d'une coupure automatique ; un tel canal comprend par exemple, voir figures 1 et 3, une ouverture supérieure 88 opposée aux leviers, et s'étendant dans le plan PP' entre les points 88' et 88" où aboutissent deux ailettes les plus éloignées l'une de l'autre, un premier canal 89, éventuellement des obstacles tels que 90', 90" prenant la forme de grillage ou de tôles perforées, un second canal 91' respectivement 91" contournant par exemple les logement 47, 46 des ressorts de pression, et enfin un orifice d'échappement 92' respectivement 92" débouchant par exemple dans une paroi latérale 41 respectivement 40 au voisinage des bornes 12,13 voir la figure 3..Between the side walls 40, 41, the roof 84 opposite the base 15, and the longitudinal walls 86, 87 of the housing on the one hand, and the form surfaces which hold the fins in the arc chamber 43, it is possible to have a path for the evacuation and rolling of the gases which appear during an automatic shutdown; such a channel comprises, for example, see FIGS. 1 and 3, an upper opening 88 opposite the levers, and extending in the plane PP 'between the points 88' and 88 "where two furthest fins end one of the 'other, a first channel 89, possibly obstacles such as 90', 90 "taking the form of mesh or perforated sheets, a second channel 91 'respectively 91" bypassing for example the housing 47, 46 of the pressure springs, and finally a exhaust port 92 'respectively 92 "opening for example in a side wall 41 respectively 40 in the vicinity of the terminals 12,13 see Figure 3 ..

Le boîtier de l'appareil unipolaire peut avantageusement être présenté sous une forme élémentaire ne contenant que les éléments nécessaires à la coupure d'un conducteur de phase, de sorte que plusieurs boîtiers élémentaires pourront être associés côte à côte lorsque l'on doit effectuer la protection d'une ligne polyphasée, voir la figure 3, par exemple à l'aide de tiges d'accouplement 93, traversant les différents boîtiers 94, 95, 96.The housing of the unipolar device can advantageously be presented in an elementary form containing only the elements necessary for cutting a phase conductor, so that several elementary housings can be associated side by side when it is necessary to carry out the protection of a polyphase line, see Figure 3, for example using coupling rods 93, passing through the various housings 94, 95, 96.

Les amplitudes des mouvements des leviers étant importantes au voisinage des pastilles de contact, l'écran a été avantageusement appuyé sur celles-ci afin que sa libération soit immédiate. On pourrait toutefois retenir un bord 120 d'un écran 98 par un crochet 117 du levier 119 placé entre la pastille 115 et le pivot 116, tel que cela est illustré à la figure 7 ; dans ce cas, on disposera néanmoins le bord supérieur 118 de l'écran au voisinage des pastilles de contact pour que l'étirement de l'arc et la séparation galvanique se produise très rapidement après l'ouverture, comme dans l'exemple précédent.The amplitudes of movement of the levers being large in the vicinity of the contact pads, the screen was advantageously pressed on them so that its release is immediate. One could however retain an edge 120 of a screen 98 by a hook 117 of the lever 119 placed between the patch 115 and the pivot 116, as illustrated in FIG. 7; in this case, the upper edge 118 of the screen will nevertheless be placed in the vicinity of the contact pads so that the arc stretching and the galvanic separation occur very quickly after opening, as in the previous example.

Les rainures de guidage 60, 61 de l'écran, la nervure 72 et la surface de butée 45 du levier de contact 16 peuvent avantageusement être portés par une pièce moulée isolante représentée en 100 à la figure 6 et se plaçant dans le premier volume intérieur 5 entre les demi-boîtiers au moment du montage.The guide grooves 60, 61 of the screen, the rib 72 and the abutment surface 45 of the contact lever 16 can advantageously be carried by an insulating molded part represented at 100 in FIG. 6 and placed in the first interior volume. 5 between the half-housings at the time of assembly.

Cette pièce 100 comporte ici une seule rainure ou intervalle de guidage 101 pour l'écran 32, qui est placée dans le plan RR' et qui aboutit à deux logements cylindriques parallèles 102, 103, destinés à recevoir les ressorts 63, 64 ; cette rainure 101 est limitée par des parois 104, 105, sensiblement parallèles au plan RR' dont l'une porte la surface de butée 106 correspondant à 45 et qui sont toutes ceux reliées à deux murs extérieurs 107, 108 parallèles au plan médian PP'.This part 100 here comprises a single groove or guide interval 101 for the screen 32, which is placed in the plane R R 'and which leads to two parallel cylindrical housings 102, 103, intended to receive the springs 63, 64; this groove 101 is limited by walls 104, 105, substantially parallel to the plane RR ', one of which carries the abutment surface 106 corresponding to 45 and which are all those connected to two external walls 107, 108 parallel to the median plane PP '.

Ces murs.qui isolent localement les leviers de contact 16, 17 et les branches métalliques des pièces magnétiques 50 et 51 comportent deux paires de logements extérieurs ouverts 109, 110 et respectivement 111, 112 pour recevoir ces branches et cooporer au maintien mécanique des pièces magnétiques ; deux logements voisins 110, 112, disposés sur un même mur tel que 108, sont séparés par une cloison telle que 113 pour éviter un amorçage d'arc intempestif entre deux pièces magnétiques.These walls which locally isolate the contact levers 16, 17 and the metal branches of the magnetic parts 50 and 51 comprise two pairs of open external housings 109, 110 and respectively 111, 112 to receive these branches and cooperate in the mechanical holding of the magnetic parts. ; two neighboring housings 110, 112, arranged on the same wall as 108, are separated by a partition such as 113 to avoid an untimely arcing between two magnetic pieces.

Les leviers 16, 17 se déplacent dans deux encoches 114, 115 qui sont placées entre les murs 107, 108 et qui aboutissent aux parois 104, 105.The levers 16, 17 move in two notches 114, 115 which are placed between the walls 107, 108 and which end at the walls 104, 105.

Claims (10)

1. Dispositif interrupteur-limiteur comprenant, d'une part, deux leviers de contacts parallèles et mobiles autour de pivots qui sont soumis chacun à un ressort de manière à appliquer l'une contre l'autre deux pastilles de contacts placées aux extrémités respectives de ces leviers, et d'autre part, un écran isolant parallèle aux pivots, qui est appliqué élastiquement contre une région des leviers de, façon telle que lorsqu'un courant de court-circuit dans les leviers écarte ces derniers, une portion de cet écran vient s'intercaler entre les leviers pour empêcher la refermeture élastique des pastilles de contact,
caractérisé en ce que la portion de cet écran (32) respectivement (98) est placée au voisinage d'un bord (33) respectivement (118) de ce dernier, qui est voisin des pastilles de contact (28, 29) lorsque celles-ci sont fermées, et qui se déplace entre ces pastilles dans une direction perpendiculaire aux pivots (20, 21).1. A switch-limiter device comprising, on the one hand, two parallel and movable contact levers around pivots which are each subjected to a spring so as to apply one against the other two contact pads placed at the respective ends of these levers, and on the other hand, an insulating screen parallel to the pivots, which is applied elastically against a region of the levers in such a way that when a short-circuit current in the levers spreads the latter, a portion of this screen is inserted between the levers to prevent elastic reclosing of the contact pads,
characterized in that the portion of this screen (32) respectively (98) is placed in the vicinity of an edge (33) respectively (118) of the latter, which is close to the contact pads (28, 29) when these these are closed, and which moves between these pellets in a direction perpendicular to the pivots (20, 21). 2. Dispositif interrupteur selon la revendication 1, caractérisé en ce que le bord (33) de l'écran s'appuie contre des surfaces de butées mobiles, constituées par au moins l'un des rebords (56, 57), qui sont portés par les pastilles de contact (28, 29), et qui sont dirigées vers les pivots (21, 22) des leviers.2. Switch device according to claim 1, characterized in that the edge (33) of the screen bears against movable stop surfaces, constituted by at least one of the flanges (56, 57), which are carried by the contact pads (28, 29), and which are directed towards the pivots (21, 22) of the levers. 3. Dispositif disjoncteur selon les revendications 1 ou 2,
caractérisé en ce que les pastilles de contact (28, 29) sont appliquées l'une contre l'autre par des ressorts particuliers (38, 39) sensiblement coaxiaux XX', qui exercent leurs forces d'application dans des régions (36, 37) opposées aux pastilles.3. Circuit breaker device according to claims 1 or 2,
characterized in that the contact pads (28, 29) are applied against each other by particular springs (38, 39) substantially coaxial XX ', which exert their application forces in regions (36, 37 ) opposite the pellets. 4. Dispositif interrupteur selon l'une des revendications 1 à 3,
caractérisé en ce que les leviers de contacts (16, 17) sont disposés dans un premier volume (5) d'un boîtier de l'appareil compris entre l'axe XX' des ressorts et un fond de fixation (15, 65) de ce boîtier au .voisinage duquel sont placés les pivots (21, 20) de ces leviers et des bornes (12, 13) reliées au levier de contact.4. Switch device according to one of claims 1 to 3,
characterized in that the contact levers (16, 17) are arranged in a first volume (5) of a housing of the apparatus comprised between the axis XX 'of the springs and a fixing base (15, 65) of this housing in the vicinity of which the pivots (21, 20 are placed) ) of these levers and terminals (12, 13) connected to the contact lever. 5. Dispositif interrupteur selon l'une des revendications 1 à 4,
caractérisé en ce que des pièces magnétiques (50, 51) en forme de U dont les branches entourent les bras des leviers, sont placées dans ce premier volume (5) entre les ressorts de pression (38, 39) et des conducteurs souples (22, 23) circulant au moins partiellement parallèlement au fond (15, 65) du boîtier pour relier ces leviers à des bornes (13, 14).5. Switch device according to one of claims 1 to 4,
characterized in that U-shaped magnetic parts (50, 51) whose branches surround the arms of the levers, are placed in this first volume (5) between the pressure springs (38, 39) and flexible conductors (22 , 23) circulating at least partially parallel to the bottom (15, 65) of the housing to connect these levers to terminals (13, 14). 6. Dispositif interrupteur selon l'une des revendications 1 à 5,
caractérisé en ce que l'écran (32) est guidé par deux bords latéraux parallèles (58, 59) placés dans des rainures de guidage (60) respectivement (61) du boîtier (1) formant des chicanes entre les deux leviers (16, 17).6. Switch device according to one of claims 1 to 5,
characterized in that the screen (32) is guided by two parallel lateral edges (58, 59) placed in guide grooves (60) respectively (61) of the housing (1) forming baffles between the two levers (16, 17). 7. Dispositif interrupteur selon.l'une des revendications 1 à 6,
caractérisé en ce que une chambre d'arc (43, 43', 43") comportant une multiplicité d'ailettes (44) est placée dans un second volume (7) du boîtier opposé au premier volume (5) par rapport aux ressorts de pression (38, 39), et que deux ailettes (68, 69) plus longues que les autres, entourent un point particulier "A" de la chambre d'arc qui correspond à la position de repos du bord (33) de l'écran (57) après une ouverture automatique.7. Switch device according to one of claims 1 to 6,
characterized in that an arc chamber (43, 43 ', 43 ") comprising a multiplicity of fins (44) is placed in a second volume (7) of the housing opposite the first volume (5) relative to the springs of pressure (38, 39), and that two fins (68, 69) longer than the others, surround a particular point "A" of the arc chamber which corresponds to the rest position of the edge (33) of the screen (57) after automatic opening. 8. Dispositif interrupteur selon l'une des revendications 1 à 7,
caractérisé en ce que le boîtier (1) de l'appareil comprend deux demi-boîtiers (3, 4) présentant des surfaces de forme pour maintenir des ailettes de soufflage (44) d'une chambre d'arc (43), et entre lesquels est disposée dans le premier volume une pièce isolante (100) comportant deux parois (104, 105) entre lesquelles est guidé l'écran isolant (32), deux logements (102, 103) parallèles pour guider des ressorts de compression (63, 64), deux encoches (114, 115) dans lesquelles se déplacent les leviers (16, 17) et deux murs (107, 108) qui entourent ces encoches et présentent des logements (109, 110, 111, 112) pour maintenir des branches de pièces en U magnétiques qui entourent les leviers.8. Switch device according to one of claims 1 to 7,
characterized in that the housing (1) of the device comprises two half-housings (3, 4) having shaped surfaces for holding the blowing fins (44) of an arc chamber (43), and between which is arranged in the first volume an insulating part (100) comprising two walls (104, 105) between which the screen is guided insulator (32), two parallel housings (102, 103) for guiding compression springs (63, 64), two notches (114, 115) in which the levers (16, 17) move and two walls (107, 108 ) which surround these notches and have housings (109, 110, 111, 112) for holding branches of magnetic U-shaped parts which surround the levers. 9. Dispositif interrupteur selon l'une des revendications 1 à 8,
caractérisé en ce que des canaux d'évacuation des gaz (89, 90, 91), circulent dans le boîtier (1) d'abord entre une ouverture (88) de la chambre d'arc (43) opposée aux leviers (16, 17) et un toit (84) du boîtier, ensuite entre cette chambre d'arc et des parois latérales (40, 41) du boîtier parallèles aux leviers et aboutissent enfin à des ouvertures (92) placées près de bornes (12, 13) de l'appareil après avoir contourné des logements de-guidage (46, 47) des ressorts de pression de contact (38, 39).9. Switch device according to one of claims 1 to 8,
characterized in that gas discharge channels (89, 90, 91) circulate in the housing (1) first between an opening (88) in the arc chamber (43) opposite the levers (16, 17) and a roof (84) of the housing, then between this arc chamber and side walls (40, 41) of the housing parallel to the levers and finally lead to openings (92) placed near terminals (12, 13) of the device after having bypassed the guide housings (46, 47) of the contact pressure springs (38, 39). 10. Dispositif interrupteur selon l'une des revendications 1 à 9,
caractérisé en ce que lorsque les contacts sont fermés, un premier levier (16) est soumis à l'action d'un premier ressort de pression de contact (38) qui l'appuie contre une surface de butée (45) respectivement (106) avec une force i supérieure à celle qui est exercée par un second ressort de pression (39) associé à un second levier.10. Switch device according to one of claims 1 to 9,
characterized in that when the contacts are closed, a first lever (16) is subjected to the action of a first contact pressure spring (38) which presses it against a stop surface (45) respectively (106) with a force i greater than that which is exerted by a second pressure spring (39) associated with a second lever.
EP82401380A 1981-08-07 1982-07-26 Automatic limitation device for short circuit currents Expired EP0074288B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401380T ATE13106T1 (en) 1981-08-07 1982-07-26 AUTOMATIC LIMITING DEVICE FOR SHORT-CIRCUIT CURRENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8115573A FR2511185A1 (en) 1981-08-07 1981-08-07 AUTOMATIC DEVICE FOR LIMITING SHORT CIRCUIT CURRENTS
FR8115573 1981-08-07

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EP0074288A1 true EP0074288A1 (en) 1983-03-16
EP0074288B1 EP0074288B1 (en) 1985-05-02

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US (1) US4467298A (en)
EP (1) EP0074288B1 (en)
JP (1) JPS5838434A (en)
AT (1) ATE13106T1 (en)
BR (1) BR8204620A (en)
CA (1) CA1189554A (en)
DE (1) DE3263401D1 (en)
FR (1) FR2511185A1 (en)
IE (1) IE53908B1 (en)

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US2477837A (en) * 1944-08-25 1949-08-02 Westinghouse Electric Corp Circuit interrupter
DE1010618B (en) * 1952-01-21 1957-06-19 Rudolf Bogenschuetz Ges Mit Be Arc chamber for electrical circuit breakers
US3068379A (en) * 1957-04-11 1962-12-11 Fed Pacific Electric Co Circuit protective apparatus
FR1238660A (en) * 1958-10-16 1960-08-12 Siemens Ag Device for lengthening electric arcs
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US4031492A (en) * 1975-08-22 1977-06-21 Westinghouse Electric Corporation Triple break current limiter

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Also Published As

Publication number Publication date
FR2511185A1 (en) 1983-02-11
US4467298A (en) 1984-08-21
DE3263401D1 (en) 1985-06-05
IE821920L (en) 1983-02-07
EP0074288B1 (en) 1985-05-02
ATE13106T1 (en) 1985-05-15
JPH0219572B2 (en) 1990-05-02
CA1189554A (en) 1985-06-25
FR2511185B1 (en) 1984-09-21
BR8204620A (en) 1983-07-26
JPS5838434A (en) 1983-03-05
IE53908B1 (en) 1989-04-12

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