EP0186546B1 - Electrical switch with a shield - Google Patents

Electrical switch with a shield Download PDF

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Publication number
EP0186546B1
EP0186546B1 EP85402285A EP85402285A EP0186546B1 EP 0186546 B1 EP0186546 B1 EP 0186546B1 EP 85402285 A EP85402285 A EP 85402285A EP 85402285 A EP85402285 A EP 85402285A EP 0186546 B1 EP0186546 B1 EP 0186546B1
Authority
EP
European Patent Office
Prior art keywords
screen
contacts
switch
cavity
shutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85402285A
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German (de)
French (fr)
Other versions
EP0186546A1 (en
Inventor
Elie Belbel
André Haury
Christian Blanchard
Michel Lauraire
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telemecanique SA
Original Assignee
Telemecanique Electrique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telemecanique Electrique SA filed Critical Telemecanique Electrique SA
Priority to AT85402285T priority Critical patent/ATE40491T1/en
Publication of EP0186546A1 publication Critical patent/EP0186546A1/en
Application granted granted Critical
Publication of EP0186546B1 publication Critical patent/EP0186546B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/32—Insulating body insertable between contacts

Definitions

  • the invention relates to an electrical screen switch comprising in a housing two movable contacts relative to each other, means for controlling the opening of this switch, a movable screen provided with an opening through which passes one of the switch contacts, propulsion means constituted by the gas pressure developed at the moment when the arc appears which rapidly move an edge of this screen between the contacts so as to shear, between this edge and an insulating wall contained in the housing, the arc appearing between these contacts at the time of their separation, and a space of variable volume which contains one of the contacts, and which increases rapidly in volume when the energy of the arc appearing at the separation of the contacts is communicated to the gases contained in this volume.
  • breaking devices capable of interrupting in a line where they are placed in series, either transient currents, for example, consecutive to the appearance of short circuits, or permanent currents whose nominal intensity is high.
  • Such switches are already known, for example from European patent applications EP-A-0 118 333 and German DE-C-472 305. If the means which are used to cause the displacement of the screen do not respond at the growth rate or at the threshold of the intensity of the current to be interrupted, there is a risk of not obtaining the same quality of cutoff in each of the situations where such an interruption is necessary.
  • the object of the invention is therefore to provide such known switches with means which will be capable of adapting the speed of movement of the screen to the energy which is released by the arc at when it is established between contacts.
  • the aim is achieved thanks to the fact that the screen and a movable insulating flap to which it is connected, move at the same time in a cavity of the body so as to contain between them and surfaces of this cavity, the variable volume space which is connected to the atmosphere for a particular position of this screen where the opening is no longer opposite the contact.
  • the gas pressure developed at the moment when the arc appears is applied to a movable insulating drive flap which is connected to a movable screen and which forms at that time, with walls of the housing, a substantially sealed volume or space.
  • variable volume is not comprised between walls belonging to a case having a hollow or tubular configuration
  • an insulating flat screen 219 having an opening 220 can slide along a surface 221 belonging to a cavity 222 of an insulating housing 223; lateral edges 224, 225, see FIG. 4, as well as a rear portion 226 of the screen are engaged with a functional clearance in grooves 227, 228, 229 of the cavity to ensure, when the screen is moved upwards in the figure 3, a total electrical isolation between the cavity, where is placed a movable contact lever 230 whose contact pad 232 passes through the opening, and a fixed contact 231 which is placed back from the surface 221.
  • An end region 233 of the screen, directed towards the cavity has coupling means 234 able to cooperate with one end 235 of a flap 236 which pivots at the other end around an axis 237.
  • This end this pivot point, as well as the lateral edges 247, 248 of the flap, cooperate with the walls of the cavity and, respectively, with the screen in a sufficiently tight manner so that an electric arc, appearing between the contacts at moment of their separation, produces, in the variable volume 238 of the cavity where the movable contact, a sufficiently rapid rise in pressure so that the screen is very quickly driven by the shutter towards the top of the figure and shears this arc between the opening 220 and an edge 239 of the surface 221.
  • a vent 240 passing through the housing to the cavity allows the variable volume to be purged for a certain position of the flap.
  • Terminals 241, 242 and a flexible braid 243 make it possible to connect the switch 244 to a use circuit.
  • the screen 250 and the flap 251 could be molded in a single insulating piece 256, the variable volume 252 being contained here between rigid screen walls 253 and 254, 254 ′, 254 "from the housing, and a deformable wall of the shutter 255 being embedded at one end in the housing to form an apparent pivot axis 257.
  • an insulating housing body 260 comprises a cavity 261 having a cylindrical surface 262 opposite which angularly displaces with a very small clearance a screen of the same curvature 263 which is provided with an opening 264 to let pass, in its rest position, a movable contact 265 cooperating with the fixed contact 266 placed opposite.
  • This rigid screen is integral with a radial flap 267 which is articulated on a transverse pivot 268 placed at the center of curvature of the surface 262 and which has, with the other walls 269, 270, 271 of the cavity 261, by means of cheeks 272 , 273 and to a hub 274, see FIG. 2, a sufficiently good seal so that the gases, the pressure of which rises in the space of variable volume 288 at the appearance of an arc resulting from the opening of the 'switch 275, drive the shutter clockwise; here again, decompression openings such as 276 in a cheek of the flap come opposite a vent 277 of the housing cavity for a particular position of the screen.
  • terminals 278, 279, a braid 280, a pressure spring 281 and automatic opening means such as 282 are associated with the contact lever 283; moreover, the sealing of the screen is improved by virtue of tangential edges 284, 285 which circulate in grooves 286, 287 of the housing.
  • the initial movement of the movable contact levers which slightly precedes the movement of the shutter and of the screen, so as to reveal the arc whose energy is exploited, is supposed to be caused by a magnetizable structure 246, respectively 282, whose effectiveness is real when the intensities of the currents flowing in the lever are very high and that other magnetic means of displacement are then subject to saturation.
  • windings placed in series and associated with cores, or rapid movable pallets can be used so that the movements of these parts communicate initial openings to the various movable contacts.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Push-Button Switches (AREA)
  • Breakers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Glass Compositions (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Saccharide Compounds (AREA)
  • Switches With Compound Operations (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Cookers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Automatic Disk Changers (AREA)
  • Electronic Switches (AREA)
  • Distribution Board (AREA)

Abstract

A screened electric switch in which the screen is inserted at high speed between the contacts and in which a mobile shutter with a sealing surface basically fixed relatively to the housing drives the screen with a speed which is a function of the energy of the arc. This switch is applicable to circuit breaking devices designed to check the rise of short-circuit currents or high steady-state rated currents.

Description

L'invention concerne un interrupteur électrique à écran comprenant dans un boîtier deux contacts mobiles l'un par rapport à l'autre, des moyens de commande de l'ouverture de cet interrupteur, un écran mobile pourvu d'une ouverture à travers laquelle passe un des contacts de l'interrupteur, des moyens de propulsion constitués par la pression des gaz développée au moment où apparait l'arc qui déplacent rapidement un bord de cet écran entre les contacts de façon à cisailler, entre ce bord et une paroi isolante contenue dans le boîtier, l'arc apparaissant entre ces contacts au moment de leur séparation, et un espace de volume variable qui contient l'un des contacts, et qui augmente rapidement de volume lorsque l'énergie de l'arc apparaissant à la séparation des contacts est communiquée aux gaz contenus dans ce volume.The invention relates to an electrical screen switch comprising in a housing two movable contacts relative to each other, means for controlling the opening of this switch, a movable screen provided with an opening through which passes one of the switch contacts, propulsion means constituted by the gas pressure developed at the moment when the arc appears which rapidly move an edge of this screen between the contacts so as to shear, between this edge and an insulating wall contained in the housing, the arc appearing between these contacts at the time of their separation, and a space of variable volume which contains one of the contacts, and which increases rapidly in volume when the energy of the arc appearing at the separation of the contacts is communicated to the gases contained in this volume.

Elle s'applique notamment, mais non exclusivement, à des appareils de coupures aptes à interrompre dans une ligne où ils sont placés en série, soit des courants transitoires, par exemple, consécutifs à l'apparition de courts-circuits, soit des courants permanents dont l'intensité nominale est élevée.It applies in particular, but not exclusively, to breaking devices capable of interrupting in a line where they are placed in series, either transient currents, for example, consecutive to the appearance of short circuits, or permanent currents whose nominal intensity is high.

On connaît déjà de tels interrupteurs, par exemple par les demandes de brevet européen EP-A-0 118 333 et allemand DE-C-472 305. Si les moyens qui sont mis en oeuvre pour provoquer le déplacement de l'écran ne répondent pas à la vitesse de croissance ou au seuil de l'intensité du courant à interrompre, on risque de ne pas obtenir la même qualité de coupure dans chacune des situations où une telle interruption est nécessaire.Such switches are already known, for example from European patent applications EP-A-0 118 333 and German DE-C-472 305. If the means which are used to cause the displacement of the screen do not respond at the growth rate or at the threshold of the intensity of the current to be interrupted, there is a risk of not obtaining the same quality of cutoff in each of the situations where such an interruption is necessary.

Le but que se propose l'invention est, par suite, d'apporter à de tels interrupteurs connus des moyens qui seront susceptibles d'adapter la vitesse de déplacement de l'écran, à l'énergie qui est dégagée par l'arc au moment où celui-ci s'établit entre les contacts.The object of the invention is therefore to provide such known switches with means which will be capable of adapting the speed of movement of the screen to the energy which is released by the arc at when it is established between contacts.

Selon l'invention, le but visé est atteint grâce au fait que l'écran et un volet mobile isolant auquel il est relié, se déplacent en même temps dans une cavité du corps de façon à contenir entre eux et des surfaces de cette cavité, l'espace de volume variable qui est relié à l'atmosphère pour une position particulière de cet écran où l'ouverture n'est plus en regard du contact.According to the invention, the aim is achieved thanks to the fact that the screen and a movable insulating flap to which it is connected, move at the same time in a cavity of the body so as to contain between them and surfaces of this cavity, the variable volume space which is connected to the atmosphere for a particular position of this screen where the opening is no longer opposite the contact.

D'autres résultats complémentaires tels qu'une diminution de la masse du système mobile lié à l'écran pour un volume donné de la cavité dans laquelle apparaît cet arc, ainsi que divers modes de réalisation auxquels se prête l'invention seront mieux compris à la lecture de la description ci-dessous et à l'examen des figures annexées qui l'accompagnent, et parmi lesquelles:

  • La figure 1 représente, dans une vue en élévation coupée par un plan moyen JJ', un premier mode de réalisation de l'invention;
  • La figure 2 montre une vue de côté de l'appareil selon la figure 1 coupé par un plan VV';
  • La figure 3 illustre dans une vue en élévation coupée par le plan HH' un second mode de réalisation de l'invention;
  • La figure 4 montre une vue de côté de l'appareil selon la figure 3 coupé par le plan brisé WW'; et
  • La figure 5 représente, dans une vue en élévation partielle, une chambre de coupure d'appareil interrupteur selon l'invention faisant appel à une variante de celle représentée à la figure 3.
Other complementary results such as a reduction in the mass of the mobile system linked to the screen for a given volume of the cavity in which this arc appears, as well as various embodiments to which the invention lends itself will be better understood. reading the description below and examining the accompanying figures which accompany it, and among which:
  • FIG. 1 represents, in an elevation view cut by a mean plane JJ ′, a first embodiment of the invention;
  • Figure 2 shows a side view of the apparatus according to Figure 1 cut by a plane VV ';
  • Figure 3 illustrates in an elevational view cut through the plane HH 'a second embodiment of the invention;
  • Figure 4 shows a side view of the apparatus according to Figure 3 cut by the broken plane WW '; and
  • FIG. 5 represents, in a partial elevation view, a switch-off chamber of a switchgear according to the invention using a variant of that shown in FIG. 3.

Dans l'ensemble des moyens qui seront décrits ci-dessous, la pression des gaz développée au moment où apparaît l'arc est appliquée à un volet mobile isolant d'entraînement qui est relié à un écran mobile et qui forme à ce moment là, avec des parois du boîtier, un volume ou espace sensiblement étanche.In all of the means which will be described below, the gas pressure developed at the moment when the arc appears is applied to a movable insulating drive flap which is connected to a movable screen and which forms at that time, with walls of the housing, a substantially sealed volume or space.

Dans les modes de réalisation représentés, où le contact mobile de l'interrupteur est placé dans cet espace, il est nécessaire de donner à celui-ci des dimensions suffisantes pour que le déplacement de ce contact mobile atteigne une amplitude suffisante. L'une des façons de réduire l'importance des masses en mouvement est donc de circonscrire cet espace par des parois ayant des déplacements et des masses aussi réduits que possible; une telle réduction est avantageusement obtenue en rendant sensiblement fixe une région de la paroi servant de volet d'entraînement, notamment grâce à la mise en oeuvre de moyens d'étanchéité rotatifs; une intéressante réduction des frottements peut également être ainsi obtenue.In the embodiments shown, where the movable contact of the switch is placed in this space, it is necessary to give the latter sufficient dimensions so that the displacement of this movable contact reaches a sufficient amplitude. One of the ways of reducing the importance of the masses in movement is therefore to circumscribe this space by walls having displacements and masses as reduced as possible; such a reduction is advantageously obtained by making a region of the wall serving as a drive flap substantially fixed, in particular by virtue of the use of rotary sealing means; an interesting reduction in friction can also be obtained in this way.

Un mode de réalisation dans lequel le volume variable n'est pas compris entre des parois appartenant à un étui ayant une configuration creuse ou tubulaire est visible aux figures 3 et 4, où un écran plat isolant 219 présentant une ouverture 220, peut coulisser le long d'une surface 221 appartenant à une cavité 222 d'un boîtier isolant 223; des bords latéraux 224, 225, voir figure 4, ainsi qu'une portion arrière 226 de l'écran sont engagés avec un jeu fonctionnel dans des rainures 227,228,229 de la cavité pour assurer, lorsque l'écran est déplacé vers le haut de la figure 3, un isolement électrique total entre la cavité, où se trouve placé un levier de contact mobile 230 dont la pastille de contact 232 traverse l'ouverture, et un contact fixe 231 qui est placé en retrait de la surface 221.An embodiment in which the variable volume is not comprised between walls belonging to a case having a hollow or tubular configuration is visible in Figures 3 and 4, where an insulating flat screen 219 having an opening 220, can slide along a surface 221 belonging to a cavity 222 of an insulating housing 223; lateral edges 224, 225, see FIG. 4, as well as a rear portion 226 of the screen are engaged with a functional clearance in grooves 227, 228, 229 of the cavity to ensure, when the screen is moved upwards in the figure 3, a total electrical isolation between the cavity, where is placed a movable contact lever 230 whose contact pad 232 passes through the opening, and a fixed contact 231 which is placed back from the surface 221.

Une région d'extrémité 233 de l'écran, dirigée vers la cavité présente des moyens d'accouplement 234 aptes à coopérer avec une extrémité 235 d'un volet 236 qui pivote à l'autre extrémité autour d'un axe 237. Cette extrémité, ce point de pivotement, ainsi que les bords latéraux 247, 248 du volet, coopèrent avec les parois de la cavité et, respectivement, avec l'écran d'une façon suffisamment étanche pour qu'un arc électrique, apparaissant entre les contacts au moment de leur séparation, produise, dans le volume variable 238 de la cavité où se trouve le contact mobile, une élévation suffisamment rapide de la pression pour que l'écran soit très rapidement entraîné par le volet vers le haut de la figure et effectue un cisaillement de cet arc entre l'ouverture 220 et un bord 239 de la surface 221.An end region 233 of the screen, directed towards the cavity has coupling means 234 able to cooperate with one end 235 of a flap 236 which pivots at the other end around an axis 237. This end , this pivot point, as well as the lateral edges 247, 248 of the flap, cooperate with the walls of the cavity and, respectively, with the screen in a sufficiently tight manner so that an electric arc, appearing between the contacts at moment of their separation, produces, in the variable volume 238 of the cavity where the movable contact, a sufficiently rapid rise in pressure so that the screen is very quickly driven by the shutter towards the top of the figure and shears this arc between the opening 220 and an edge 239 of the surface 221.

Un évent 240 traversant le boîtier jusqu'à la cavité, permet d'opérer la purge du volume variable pour une certaine position du volet. Des bornes 241, 242 et une tresse souple 243 permettent de raccorder l'interrupteur 244 à un circuit d'utilisation. Un ressort de pression de contact 245, ainsi qu'un dispositif 246 réagissant à une sur intensité (par exemple, une pièce magnétisable en U), exercent par exemple des efforts antagonistes sur le levier de contact mobile, et lorsque survient cette surintensité, le levier de contact est brusquement déplacé en sens horaire, ce qui donne naissance à un arc.A vent 240 passing through the housing to the cavity allows the variable volume to be purged for a certain position of the flap. Terminals 241, 242 and a flexible braid 243 make it possible to connect the switch 244 to a use circuit. A contact pressure spring 245, as well as a device 246 reacting to an overcurrent (for example, a magnetizable U-shaped part), exert, for example, antagonistic forces on the movable contact lever, and when this overcurrent occurs, the contact lever is suddenly moved clockwise, which gives rise to an arc.

Dans une variante, visible à la figure 5, l'écran 250 et le volet 251 pourraient être moulés en une seule pièce isolante 256, le volume variable 252 étant contenu ici entre des parois rigides d'écran 253 et respectivement 254, 254', 254" du boîtier, et une paroi déformable du volet 255 se trouvant encastrée à une extrémité dans le boîtier pour former un axe de pivotement apparent 257.In a variant, visible in FIG. 5, the screen 250 and the flap 251 could be molded in a single insulating piece 256, the variable volume 252 being contained here between rigid screen walls 253 and 254, 254 ′, 254 "from the housing, and a deformable wall of the shutter 255 being embedded at one end in the housing to form an apparent pivot axis 257.

Il est clair qu'un appareil interrupteur pourrait aussi être obtenu par une association symétrique par rapport au plan TT' de la figure 3, de deux leviers de contact mobiles qui seraient appuyés l'un sur l'autre et se sépareraient de la même manière.It is clear that a switching device could also be obtained by a symmetrical association with respect to the plane TT 'of FIG. 3, of two movable contact levers which would be supported one on the other and would separate in the same way .

Dans le mode d'exécution qui vient d'être décrit aux figures 3,4, 5, on peut craindre que la pression des gaz exercée sur l'écran ne plaque exagérément celui-ci sur la surface voisine, ce qui aurait pour effet de freiner ou de ralentir le mouvement.In the embodiment which has just been described in FIGS. 3, 4, 5, it is feared that the pressure of the gases exerted on the screen will exaggerately plate it on the neighboring surface, which would have the effect of brake or slow down the movement.

Un tel inconvénient peut être écarté en donnant à l'écran la forme d'une portion de cylindre qui est supportée et pivotée à l'aide du volet ainsi que cela est visible aux figures 1 et 2, où un corps de boîtier isolant 260 comporte une cavité 261 ayant une surface cylindrique 262 en regard de laquelle se déplace angulairement avec un très faible jeu un écran de même courbure 263 qui est pourvu d'une ouverture 264 pour laisser passer, dans sa position de repos, un contact mobile 265 coopérant avec le contact fixe 266 placé en regard.Such a drawback can be eliminated by giving the screen the form of a portion of cylinder which is supported and pivoted using the flap, as can be seen in FIGS. 1 and 2, where an insulating housing body 260 comprises a cavity 261 having a cylindrical surface 262 opposite which angularly displaces with a very small clearance a screen of the same curvature 263 which is provided with an opening 264 to let pass, in its rest position, a movable contact 265 cooperating with the fixed contact 266 placed opposite.

Cet écran rigide est solidaire d'un volet radial 267 qui est articulé sur un pivot transversal 268 placé au centre de courbure de la surface 262 et qui présente avec les autres parois 269, 270, 271 de la cavité 261, grâce à des joues 272, 273 et à un moyeu 274, voir figure 2, une étanchéité suffisamment bonne pour que les gaz, dont la pression s'élève dans l'espace de volume variable 288 à l'apparition d'un arc résultant de l'ouverture de l'interrupteur 275, chassent le volet dans le sens horaire; ici encore, des ouvertures de décompression telles que 276 dans une joue du volet viennent en regard d'un évent 277 de la cavité du boîtier pour une position particulière de l'écran.This rigid screen is integral with a radial flap 267 which is articulated on a transverse pivot 268 placed at the center of curvature of the surface 262 and which has, with the other walls 269, 270, 271 of the cavity 261, by means of cheeks 272 , 273 and to a hub 274, see FIG. 2, a sufficiently good seal so that the gases, the pressure of which rises in the space of variable volume 288 at the appearance of an arc resulting from the opening of the 'switch 275, drive the shutter clockwise; here again, decompression openings such as 276 in a cheek of the flap come opposite a vent 277 of the housing cavity for a particular position of the screen.

Comme dans le mode de réalisation précédent, des bornes 278, 279, une tresse 280, un ressort de pression 281 et des moyens d'ouverture automatique tels que 282 sont associés au levier de contact 283; par ailleurs, l'étanchéité de l'écran est améliorée grâce à des bords tangentiels 284, 285 qui circulent dans des rainures 286, 287 du boîtier.As in the previous embodiment, terminals 278, 279, a braid 280, a pressure spring 281 and automatic opening means such as 282 are associated with the contact lever 283; moreover, the sealing of the screen is improved by virtue of tangential edges 284, 285 which circulate in grooves 286, 287 of the housing.

Il est clair que des moyens, non représentés pour plus de clarté, permettent de redonner aux écrans 263, 219, 260, après une ouverture, une position identique à celle qui est représentée et qu'un chemin d'échappement est offert aux gaz qui, autrement, se trouveraient emprisonnés entre les écrans et les régions où sont placés les contacts fixes. Il est de même nécessaire de disposer, sur la portion de cavité placée devant l'écran telle que 289, une ouverture de purge vers l'atmosphère pour éviter un freinage du mouvement.It is clear that means, not shown for clarity, make it possible to restore the screens 263, 219, 260, after opening, a position identical to that which is represented and that an exhaust path is offered to the gases which otherwise, they would be trapped between the screens and the regions where the fixed contacts are placed. It is likewise necessary to have, on the portion of cavity placed in front of the screen such as 289, a purge opening towards the atmosphere to avoid braking of the movement.

Dans les exemples de réalisation qui viennent d'être illustrés , le mouvement initial des leviers de contact mobiles, qui précède de peu le mouvement du volet et de l'écran, de façon à faire apparaître l'arc dont l'énergie est exploitée, est supposé être provoqué par une structure magnétisable 246, respectivement 282, dont l'efficacité est réelle lorsque les intensités des courants circulant dans le levier sont très élevées et que d'autres moyens magnétiques de déplacement sont alors sujets à une saturation.In the exemplary embodiments which have just been illustrated, the initial movement of the movable contact levers, which slightly precedes the movement of the shutter and of the screen, so as to reveal the arc whose energy is exploited, is supposed to be caused by a magnetizable structure 246, respectively 282, whose effectiveness is real when the intensities of the currents flowing in the lever are very high and that other magnetic means of displacement are then subject to saturation.

Lorsque les intensités sont importantes sans toutefois atteindre les niveaux précédents, des bobinages placés en série et associés à des noyaux, ou palettes mobiles rapides peuvent être mis en oeuvre pour que les mouvements de ces pièces communiquent des ouvertures initiales aux divers contacts mobiles.When the intensities are high without however reaching the previous levels, windings placed in series and associated with cores, or rapid movable pallets can be used so that the movements of these parts communicate initial openings to the various movable contacts.

Pour des régimes d'ouverture d'interrupteur sous un courant nominal destinés par exemple à établir un isolement de la ligne, on peut s'arranger pour que l'écran soit ou ne soit pas déplacé selon que l'énergie dissipée par l'arc et la qualité de la coupure le rendent ou non nécessaire.For switch opening regimes under a nominal current intended for example to establish line isolation, it is possible to arrange so that the screen is or is not moved according to whether the energy dissipated by the arc and the quality of the cut make it necessary or not.

Claims (5)

1. A switch containing inside a housing (260) two mutually mobile contacts (265,266), devices to control the opening of this switch, a mobile screen (263) provided with an opening (264) through which passes one of the contacts (265) of the switch, driving devices formed by the gas pressure generated at the time when the arc appears, which move an edge of said screen (263) very fast between the contacts (265, 266) so that the arc that strikes between these contacts (265, 266) when they part is shared between this edge and an insulating wall contained in the housing (260), and a space of variable volume that houses one of the contacts (265 and 283) and whose volume expands sharply when the energy of the arc generated between separating contacts is transferred to the gases contained within said volume, characterized in that said screen (263) and an isolating mobile shutter (267) to which it is joined, move at the same time inside a cavity (262) of the body (260) so as to enclose between themselves and surfaces (270, 271) of this cavity the space of variable volume which is connected to the atmosphere in a particular position of said screen (263) wherein the opening (264) is no longer opposite the contact.
2. The switch according to claim 1, characterized in that the screen (263) and the shutter (267) are both part of one single insulating part.
3. The switch according to claim 2, characterized in that this insulating screen (219, 250) moves in a straight line and limits the variable space (238, 252).
4. The switch according to claim 2, characterized in that this insulating part has a pivoting movement and comprises a shutter (267) one end of which (274) oscillates with a seal around a pivot (268) inside the cavity (262).
5. The switch according to claim 1, characterized in that the screen (219, 250) that moves in a straight line and the shutter (251, 236) that has an angular movement are joined by a sealed coupling device (235, 234) respectively (255).
EP85402285A 1984-11-26 1985-11-25 Electrical switch with a shield Expired EP0186546B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85402285T ATE40491T1 (en) 1984-11-26 1985-11-25 ELECTRICAL SWITCH WITH SHIELD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8417964 1984-11-26
FR8417964A FR2573914B1 (en) 1984-11-26 1984-11-26 ELECTRICAL SWITCH WITH SCREEN

Publications (2)

Publication Number Publication Date
EP0186546A1 EP0186546A1 (en) 1986-07-02
EP0186546B1 true EP0186546B1 (en) 1989-01-25

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EP85402285A Expired EP0186546B1 (en) 1984-11-26 1985-11-25 Electrical switch with a shield

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US (1) US4659887A (en)
EP (1) EP0186546B1 (en)
JP (1) JPS61153909A (en)
AT (1) ATE40491T1 (en)
BR (1) BR8505921A (en)
CA (1) CA1250009A (en)
CH (1) CH664847A5 (en)
DE (1) DE3541745C2 (en)
ES (1) ES8609806A1 (en)
FR (1) FR2573914B1 (en)
GB (1) GB2167903B (en)
IE (1) IE56994B1 (en)
IT (1) IT1186215B (en)
ZA (1) ZA859037B (en)

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FR2596196B1 (en) * 1986-03-21 1988-08-26 Telemecanique Electrique PROTECTIVE SWITCHING DEVICE PROVIDED WITH AN ARC SHUT-OFF SCREEN
ES2022388B3 (en) * 1986-04-04 1991-12-01 Telemecanique ELECTRICAL SWITCH FOR PROTECTIVE APPARATUS, LIKE A CIRCUIT BREAKER.
DE3723538A1 (en) * 1987-07-16 1989-01-26 Sachsenwerk Ag ERASE CHAMBER FOR INTERRUPTING LOAD CIRCUITS
DE3823790A1 (en) * 1988-07-14 1990-01-18 Asea Brown Boveri ELECTRICAL INSTALLATION DEVICE WITH CONTACT PARTITION
CH677986A5 (en) * 1988-07-27 1991-07-15 Sprecher & Schuh Ag
US4926610A (en) * 1988-12-12 1990-05-22 The Standard Products Company Variable-width molding and brightwork
US5780800A (en) * 1996-08-07 1998-07-14 General Electric Company Circuit breaker contact arm and spring shield
DE19726402B4 (en) * 1997-06-21 2009-03-05 Marquardt Gmbh Electric switch
DE10001632A1 (en) * 2000-01-17 2001-08-02 Harting Automotive Gmbh & Co Circuit breaker has displacement element adjustable relative to two conductors and separating element that separates conductors when displacement element in separation position
DE102006033766A1 (en) * 2006-01-25 2007-07-26 Abb Technology Ag Contact system for short-circuiting device in medium-voltage or high-voltage switchboard plant, has one stationary contact piece each per phase, connected to mains voltage, and one mobile contact piece each per phase
DE102017207426A1 (en) * 2017-05-03 2018-11-08 Siemens Aktiengesellschaft Mechanical switching device for power interruption
CN108987139B (en) * 2017-06-01 2024-02-02 泰科电子(深圳)有限公司 Electrical contact system
EP3561831B1 (en) * 2018-04-24 2022-10-26 ABB Schweiz AG An electrical switch
US11948762B2 (en) * 2021-04-30 2024-04-02 Astronics Advanced Electronic Systems Corp. High voltage high current arc extinguishing contactor

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DE472305C (en) * 1927-10-30 1929-02-26 Siemens Schuckertwerke Akt Ges Fire chamber for switch
DE2829860A1 (en) * 1978-07-07 1980-01-17 Hartmann & Braun Ag Rotary switch with opposite contacts - has insulating element inserted between contacts during their breaking
CA1133504A (en) * 1978-11-24 1982-10-12 Robert J. Knopf Carboxylated polyalkylene oxides
US4426562A (en) * 1981-10-06 1984-01-17 Westinghouse Electric Corp. Rotary switch for switching very large DC currents
FR2540665B1 (en) * 1983-02-04 1987-02-27 Telemecanique Electrique SWITCHING DEVICE PROVIDED WITH AN INSULATING SCREEN INTERPOSED BETWEEN THE CONTACTS WHEN SWITCHING OFF AND ARC SHEAR MEANS BETWEEN THIS SCREEN AND AN INSULATING WALL
US4510360A (en) * 1983-06-08 1985-04-09 Westinghouse Electric Corp. Circuit breaker with arc shield

Also Published As

Publication number Publication date
CH664847A5 (en) 1988-03-31
JPS61153909A (en) 1986-07-12
IT8522976A0 (en) 1985-11-25
DE3541745C2 (en) 1995-06-08
BR8505921A (en) 1986-08-19
GB8529130D0 (en) 1986-01-02
EP0186546A1 (en) 1986-07-02
ZA859037B (en) 1986-08-27
ATE40491T1 (en) 1989-02-15
GB2167903B (en) 1989-06-07
IE852969L (en) 1986-05-26
CA1250009A (en) 1989-02-14
IE56994B1 (en) 1992-02-26
US4659887A (en) 1987-04-21
FR2573914A1 (en) 1986-05-30
FR2573914B1 (en) 1987-02-06
ES549292A0 (en) 1986-07-16
IT1186215B (en) 1987-11-18
GB2167903A (en) 1986-06-04
ES8609806A1 (en) 1986-07-16
DE3541745A1 (en) 1986-05-28

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