EP2304755B1 - Arc extinction cage - Google Patents

Arc extinction cage Download PDF

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Publication number
EP2304755B1
EP2304755B1 EP09769542A EP09769542A EP2304755B1 EP 2304755 B1 EP2304755 B1 EP 2304755B1 EP 09769542 A EP09769542 A EP 09769542A EP 09769542 A EP09769542 A EP 09769542A EP 2304755 B1 EP2304755 B1 EP 2304755B1
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EP
European Patent Office
Prior art keywords
arc
enclosure
sheets
grooves
cage according
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EP09769542A
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German (de)
French (fr)
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EP2304755A1 (en
Inventor
Loïc Meyer
Antoine Duret
Francis Deckert
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Hager Electro SAS
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Hager Electro SAS
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Publication of EP2304755A1 publication Critical patent/EP2304755A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc chamber

Definitions

  • the present invention relates to arcing extinguishing systems capable of equipping electrical devices for breaking, for example of the circuit-breaker type.
  • This separation can be done voluntarily, using a joystick, or automatically by tilting a mechanical lock when there is a sudden overcurrent or overload on the line.
  • the arc is extinguished by means including magnetic blow molding and movement of the arc to at least one extinguishing cage equipping the devices and whose exclusive function is to extinguish the arc.
  • This cage comprises in fact a stack of so-called deionization plates which divides the previously elongated arc until the voltage necessary for its maintenance is greater than that of the network in which the apparatus is used, resulting in the permanent extinction of the arc.
  • the document US 2160681 discloses an arc extinguishing cage according to the preamble of claim 1.
  • each arc extinguishing cage is perceived as an individualizable component assembled in the housing of the electric switchgear.
  • each component consists of a stack of arc cutting plates inserted in an envelope of insulating material.
  • these sheets have a U-shape so that the movable contact can rotate between the branches of the U.
  • these sheets are inserted into their fan-shaped insulating envelopes, so that they are oriented substantially perpendicular to the stroke of the pivoting movable contact, when it reaches their level.
  • the manufacture of the component constituting the arc extinguishing cage, in particular the plugging of the sheets in the envelope, is complicated and not very compatible with the conventional requirements of industrialization, in the first place of which is the automating.
  • the arc extinguishing cage according to the invention has been optimized so as to automate its manufacture under good conditions, with respect to conventional industrial requirements.
  • One of the main advantages of the cage of the invention compared to its predecessors lies in the fact that the cutting plates can be clipped inside the insulating envelope, the guidance of these sheets being further optimized by grooves and trapezoidal housings.
  • the clipping of the various sheets inside the envelope is therefore made quickly and easily, the direction of insertion being substantially constant, the positioning being performed almost automatically inside the envelope by the configuration of the housings, grooves and orifices.
  • the relative positioning of the two trapezoidal shapes that is to say on the one hand the inner housing and on the other side grooves / orifices, combined with the particular longitudinal dimensions of the cutting plates of arc allow, at the time of insertion of said sheets in the insulating casing, precise guidance which ends in a clipping of one in the other even if the direction of insertion is not exactly in the axis definitive positioning, hence the possibility of automation.
  • a wall of the housing and a wall of the grooves are in the same plane, which further improves the guidance at the time of insertion of the sheets in the envelope.
  • all the arc cutting plates are identical. Since the trapezoidal holes are made in every other groove, with a shifting from one wall to the other of the casing, this simply means that one arc cutting sheet must be turned over before the casing. insert, from so that the clipping protrusion providing one of the lateral guide slots is found alternately on one side or the other.
  • these arc cutting plates are all identical except for the distal sheet of the fixed contact, which is provided with a hooking nose of the arc disposed between the branches of the U.
  • this feature aims to keep to a minimum the wear of the end of the movable contact. It should be noted that, as will be shown in more detail below, the fixed contact is in fact arranged directly under the cage.
  • the unitary piece forming the terminal is extended by a portion placed at one of the ends of the envelope comprising the fixed contact, which comprises a bow foot sheet in the form of a tab close to the fixed contact cut at the end of the envelope. interior and salient of said portion.
  • the stationary contact is disposed adjacent to an arc sheet, in this case an arc foot plate in one piece with the rest and which, because of its configuration, improves the effect of loop applied to the electric arc.
  • the envelope may then additionally comprise a U-shaped wall that surrounds said cut tab, so as to isolate the arc.
  • the arc extinguishing cage according to the invention is such that its envelope comprises a removable closure cover placed on the side of the connection terminal. This cover closes in a way the housing constituted by the insulating envelope, after insertion of the arc cutting plates.
  • the invention also relates to a line breaking device, for example of the circuit breaker type, and comprising an arc extinguishing cage as described above.
  • the insulating envelope (1) comprises a stack of arc cutting plates (2), in this case 9 in number. These plates (2) are configured in such a way that they can be clipped by insertion into the direction of arrow F ( figure 2 ), in particular by cooperation of lateral guide slots (see Figures 7 and 8 ) in orifices in the side walls (3, 3 ') of the insulating envelope. (1).
  • the figure 3 represents a single piece (4) forming both a connection terminal and a fixed contact (6) and, via an arc conduction plate (5), cut inside a portion containing the fixed contact (6), means for fitting at the lower end of the envelope (1).
  • the relative assembly of this terminal (4) to the insulating envelope (1) appears in the figure (4).
  • the figure 5 shows the housings (7, 7 ') of the sheets (2) situated on either side of a free space (E) inside which the moving contact (not shown) moves when it has detached itself fixed contact (6). Said movable contact actually pivots inside the space (E), remaining substantially parallel to the sheets (2). These are stacked in a fan in the insulating envelope, as appears in particular in the Figures 1 and 2 .
  • the housings (7) serving as an axial stop for the arc cutting plates (2) appear more precisely in figure 6 .
  • the positioning of said sheets (2) is also achieved by lateral trapezoidal grooves (8), one of which has an orifice (9) opening out of the side wall (3).
  • the wall (3 ') comprises in the same manner trapezoidal grooves (8'), one of which is provided with an orifice (9 ').
  • a through hole (9, 9 ') exists only in a groove (8, 8') On two.
  • these orifices are offset from one side wall (3) to the other side wall (3 '), so that there are never two orifices (9, 9') facing each other.
  • the sheets (2) are inserted so as to abut the bottom of the housings (7, 7 '), the two branches (10, 10') of the U-shaped structure of these sheets (2) forming between them a free space (E) allowing the pivoting of the movable contact at the opening.
  • the plates (2) have on each side a lateral guide slot (11, 11 '), one of which is provided with a clipping protrusion (12). This protrusion (12), penetrating into the orifices (9, 9 '), allows the clipping of each sheet in the insulating envelope (1).
  • the sheet placed at the top may include a hooking nose (13) to reduce the wear of the tip of the movable contact. Such a sheet is shown in figure 8 .
  • FIGS 9 and 10 show successively views of the side wall, (3 ') and the side wall (3) to be aware of. fan stacking with the relative positioning of each arc cutting plate (2) with respect to the openings (9, 9 '). This relative positioning will be explained in more detail with reference to Figures 13 to 15 .
  • FIG. figure (12 ) The assembly consisting of the insulating envelope (1), the.cover (14) and the unitary piece forming a terminal (4), a fixed contact (6) and an arch foot plate (5) are shown in FIG. figure (12 ), exploded view.
  • This figure shows the existence in the lower part of the insulating casing (1), a wall U (16) surrounding the tab (5) forming the foot of bow sheet. This wall (16) protects the said sheet metal (5) arch.
  • the figure 13 which is a section at the arrows AA of the figure 5 , shows the relative positioning of the housings (7) and the grooves (8) trapezoidal, including if necessary.through orifices (9).
  • each trapezoidal groove (8) there is, in the extension inwards, a housing (7).
  • the walls of this housing are also trapezoidal, to the extent of the shape of the corresponding groove (8).
  • each housing (7) is in the extension, that is to say in the same plane, as one of the walls of each trapezoidal groove (8).

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Discharge Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

Cage for extinguishing the electric arc created at the opening between a moving contact (15) and a fixed contact (6) of an electrical interrupter of at least one line of the circuit-breaker type, comprising a stack of arc-dividing laminations (2) inserted in the form of a fan in a casing (1) made of insulating material, each U-shaped lamination (2) then being oriented so as to be approximately perpendicular to the travel of the moving contact (15) pivoting between the branches (10, 10') of the U-shaped laminations. Housings located in the bottom of the casing and trapezoidal grooves/orifices located in the lateral faces of the casing make it possible, in cooperation with excrescences protruding laterally from the laminations, to clip-fasten said laminations in the casing.

Description

La présente invention a trait aux systèmes d'extinction d'arcs électriques susceptibles d'équiper les appareils électriques de coupure, par exemple du type disjoncteur.The present invention relates to arcing extinguishing systems capable of equipping electrical devices for breaking, for example of the circuit-breaker type.

Dans ces appareils, des arcs électriques apparaissent à la séparation d'un contact mobile et d'un contact fixe qui établissent la liaison électrique dans une ligne lorsqu'ils sont en position de fermeture au contact l'un de l'autre, et qui la coupent lorsqu'ils sont en position d'ouverture, c'est-à-dire séparés.In these devices, electric arcs appear at the separation of a movable contact and a fixed contact which establish the electrical connection in a line when they are in the closed position in contact with each other, and which cut it when in the open position, that is to say separated.

Cette séparation peut se faire volontairement, à l'aide d'une manette de commande, ou automatiquement par basculement d'une serrure mécanique lorsqu'il se produit une surintensité brutale ou une surcharge sur la ligne.This separation can be done voluntarily, using a joystick, or automatically by tilting a mechanical lock when there is a sudden overcurrent or overload on the line.

Le phénomène de l'arc électrique se produit dans tous les cas, à partir du moment où les contacts fixe et mobile s'écartent l'un de l'autre. Tant que l'arc électrique n'est pas éteint, la ligne n'est pas considérée comme coupée.The phenomenon of the electric arc occurs in all cases, from the moment the fixed and moving contacts deviate from each other. As long as the electric arc is not extinguished, the line is not considered cut off.

Dans les dispositifs existants, l'arc est éteint par des moyens combinant notamment soufflage magnétique et déplacement de l'arc vers au moins une cage d'extinction équipant les appareils et dont la fonction exclusive est de procéder à l'extinction de l'arc. Cette cage comprend en fait un empilement de tôles dites de déionisation qui divise l'arc préalablement allongé jusqu'à ce que la tension nécessaire à son entretien soit supérieure à celle du réseau dans lequel l'appareil est utilisé, entrainant l'extinction définitive de l'arc. Le document US 2160681 décrit une cage d'extinction de l'arc selon le préambule de la revendication 1.In existing devices, the arc is extinguished by means including magnetic blow molding and movement of the arc to at least one extinguishing cage equipping the devices and whose exclusive function is to extinguish the arc. . This cage comprises in fact a stack of so-called deionization plates which divides the previously elongated arc until the voltage necessary for its maintenance is greater than that of the network in which the apparatus is used, resulting in the permanent extinction of the arc. The document US 2160681 discloses an arc extinguishing cage according to the preamble of claim 1.

Dans l'hypothèse de l'invention, chaque cage d'extinction de l'arc est perçue comme un composant individualisé assemblable dans le boîtier de l'appareil électrique de coupure. Dans ce cas, chaque composant se compose d'un empilement de tôles de sectionnement d'arc inséré dans une enveloppe en matériau isolant. Dans la configuration de l'invention, ces tôles présentent une forme en U de sorte que le contact mobile puisse pivoter entre les branches du U.In the hypothesis of the invention, each arc extinguishing cage is perceived as an individualizable component assembled in the housing of the electric switchgear. In this case, each component consists of a stack of arc cutting plates inserted in an envelope of insulating material. In the configuration of the invention, these sheets have a U-shape so that the movable contact can rotate between the branches of the U.

Par ailleurs, toujours dans l'hypothèse de l'invention, ces tôles sont insérées dans leurs enveloppes isolantes en éventail, de sorte qu'elles soient orientées sensiblement perpendiculairement à la course du contact mobile pivotant, lorsqu'il arrive à leur niveau.Moreover, still in the hypothesis of the invention, these sheets are inserted into their fan-shaped insulating envelopes, so that they are oriented substantially perpendicular to the stroke of the pivoting movable contact, when it reaches their level.

La fabrication du composant constituant la cage d'extinction d'arc, en particulier l'enfichage des tôles dans l'enveloppe, s'avère compliquée et peu compatible avec les exigences classiques de l'industrialisation, au premier chef desquelles se trouve l'automatisation. La cage d'extinction d'arc selon l'invention a été optimisée de manière à permettre d'automatiser sa fabrication dans de bonnes conditions, eu égard aux exigences industrielles classiques.The manufacture of the component constituting the arc extinguishing cage, in particular the plugging of the sheets in the envelope, is complicated and not very compatible with the conventional requirements of industrialization, in the first place of which is the automating. The arc extinguishing cage according to the invention has been optimized so as to automate its manufacture under good conditions, with respect to conventional industrial requirements.

A cet effet, la cage d'extinction d'arc électrique selon l'invention, classiquement basée sur une enveloppe isolante dans laquelle sont empilées des tôles de sectionnement d'arc, est une cage selon la revendication 1 et se caractérise à titre principal en ce que :

  • les tôles de sectionnement présentent sur chaque côté un créneau de guidage latéral, l'un étant muni d'une excroissance de clipsage ;
  • des logements pour les extrémités libres des tôles sont prévus dans l'enveloppe, de part et d'autre de l'espace dans lequel se déplace le contact mobile, lesdits logements présentant en section d'allure parallèle à la course dudit contact une forme de trapèze dont la petite base constitue le fond du logement formant butée axiale à l'insertion des tôles ;
  • des rainures trapézoïdales sont pratiquées au même niveau dans les deux faces internes des parois latérales de l'enveloppe, lesdites rainures débouchant dans l'ouverture de l'enveloppe par laquelle sont insérées les tôles et positionnant les tôles en butée par coopération des créneaux de guidage latéraux avec les parois convergentes des rainures ;
  • des orifices trapézoïdaux traversant les parois latérales de l'enveloppe sont pratiqués dans une rainure sur deux, avec un décalage d'une paroi à l'autre de l'enveloppe, lesdits orifices étant délimités sur trois côtés par les rainures, le quatrième côté proximal de l'ouverture de l'enveloppe étant d'allure parallèle au fond du logement correspondant à la rainure, et destiné à coopérer avec l'excroissance de clipsage pour bloquer chaque tôle.
For this purpose, the electric arc extinguishing cage according to the invention, conventionally based on an insulating envelope in which arc cutting plates are stacked, is a cage according to claim 1 and is mainly characterized by what:
  • the cutting plates have on each side a lateral guide slot, one being provided with a clipping protrusion;
  • housings for the free ends of the plates are provided in the casing, on either side of the space in which the movable contact moves, said housings having in section of course parallel to the stroke of said contact a shape of trapezium whose small base constitutes the bottom of the housing forming axial abutment to the insertion of the sheets;
  • trapezoidal grooves are made at the same level in the two internal faces of the side walls of the casing, said grooves opening into the opening of the casing through which the sheets are inserted and positioning the abutting plates by cooperation of the guide slots lateral with the converging walls of the grooves;
  • trapezoidal orifices passing through the side walls of the envelope are made in every other groove, with a shifting from one wall to the other of the casing, said orifices being delimited on three sides by the grooves, the fourth proximal side of the opening of the casing being parallel to the bottom of the housing corresponding to the groove , and intended to cooperate with the protrusion clipping to block each sheet.

L'un des avantages principaux de la cage de l'invention par rapport à ses devancières réside dans le fait que les tôles de sectionnement peuvent être clipsées à l'intérieur de l'enveloppe isolante, le guidage de ces tôles étant par ailleurs optimisé par les rainures et les logements trapézoïdaux. Le clipsage des différentes tôles à l'intérieur de l'enveloppe se fait dès lors de manière rapide et aisée, la direction d'insertion étant sensiblement constante, le positionnement étant réalisé quasi automatiquement à l'intérieur de l'enveloppe par la configuration des logements, rainures et orifices.One of the main advantages of the cage of the invention compared to its predecessors lies in the fact that the cutting plates can be clipped inside the insulating envelope, the guidance of these sheets being further optimized by grooves and trapezoidal housings. The clipping of the various sheets inside the envelope is therefore made quickly and easily, the direction of insertion being substantially constant, the positioning being performed almost automatically inside the envelope by the configuration of the housings, grooves and orifices.

En d'autres termes, le positionnement relatif des deux formes trapézoïdales, c'est-à-dire d'une part du logement intérieur et d'autre part des rainures / orifices latéraux, combinés aux dimensions notamment longitudinales des tôles de sectionnement d'arc permettent, au moment de l'insertion desdites tôles dans l'enveloppe isolante, un guidage précis qui se termine par un clipsage de l'un dans l'autre même si la direction d'insertion n'est pas exactement dans l'axe du positionnement définitif, d'où la possibilité d'automatisation.In other words, the relative positioning of the two trapezoidal shapes, that is to say on the one hand the inner housing and on the other side grooves / orifices, combined with the particular longitudinal dimensions of the cutting plates of arc allow, at the time of insertion of said sheets in the insulating casing, precise guidance which ends in a clipping of one in the other even if the direction of insertion is not exactly in the axis definitive positioning, hence the possibility of automation.

Selon une possibilité, une paroi du logement et une paroi des rainures sont dans le même plan, ce qui améliore encore le guidage au moment de l'insertion des tôles dans l'enveloppe.According to one possibility, a wall of the housing and a wall of the grooves are in the same plane, which further improves the guidance at the time of insertion of the sheets in the envelope.

Conformément à une première variante de cage selon l'invention, la totalité des tôles de sectionnement d'arc sont identiques. Etant donné que les orifices trapézoïdaux sont pratiqués dans une rainure sur deux, avec un décalage d'une paroi à l'autre de l'enveloppe, cela signifie simplement qu'il faut retourner une tôle de sectionnement d'arc sur deux avant de l'insérer, de sorte que l'excroissance de clipsage munissant un des créneaux de guidage latéral se retrouve alternativement d'un côté ou de l'autre.According to a first cage variant according to the invention, all the arc cutting plates are identical. Since the trapezoidal holes are made in every other groove, with a shifting from one wall to the other of the casing, this simply means that one arc cutting sheet must be turned over before the casing. insert, from so that the clipping protrusion providing one of the lateral guide slots is found alternately on one side or the other.

Selon une configuration un peu différente, ces tôles de sectionnement d'arc sont toutes identiques à l'exception de la tôle distale du contact fixe, qui est munie d'un nez d'accrochage de l'arc disposé entre des branches du U.According to a somewhat different configuration, these arc cutting plates are all identical except for the distal sheet of the fixed contact, which is provided with a hooking nose of the arc disposed between the branches of the U.

cette caractéristique a pour objectif de maintenir à son minimum l'usure de l'extrémité du contact mobile. Il est à noter que, comme cela sera montré plus en détail dans la suite, le contact fixe est en fait disposé directement sous la cage.this feature aims to keep to a minimum the wear of the end of the movable contact. It should be noted that, as will be shown in more detail below, the fixed contact is in fact arranged directly under the cage.

La pièce unitaire formant la borne, est prolongée par une portion placée à l'une des extrémités de l'enveloppe comprenant le contact fixe, laquelle comporte une tôle de pied d'arc sous forme d'une patte voisine du contact fixe découpée à l'intérieur et saillant de ladite portion.The unitary piece forming the terminal, is extended by a portion placed at one of the ends of the envelope comprising the fixed contact, which comprises a bow foot sheet in the form of a tab close to the fixed contact cut at the end of the envelope. interior and salient of said portion.

En d'autres termes, le contact fixe est disposé adjacent à une tôle d'arc, en l'espèce une tôle de pied d'arc d'une seule pièce avec le reste et qui améliore du fait de sa configuration l'effet de boucle appliqué à l'arc électrique.In other words, the stationary contact is disposed adjacent to an arc sheet, in this case an arc foot plate in one piece with the rest and which, because of its configuration, improves the effect of loop applied to the electric arc.

Selon l'invention, l'enveloppe peut alors au surplus comporter un muret en U qui entoure ladite patte découpée, de manière à isoler l'arc.According to the invention, the envelope may then additionally comprise a U-shaped wall that surrounds said cut tab, so as to isolate the arc.

Enfin, la cage d'extinction d'arc selon l'invention est telle que son enveloppe comporte un couvercle de fermeture amovible placé du côté de la borne de connexion. Ce couvercle ferme en quelque sorte le boîtier constitué par l'enveloppe isolante, après insertion des tôles de sectionnement d'arc.Finally, the arc extinguishing cage according to the invention is such that its envelope comprises a removable closure cover placed on the side of the connection terminal. This cover closes in a way the housing constituted by the insulating envelope, after insertion of the arc cutting plates.

L'invention concerne également un appareil de coupure de lignes, par exemple du type disjoncteur, et comportant une cage d'extinction d'arc telle que décrite ci-dessus.The invention also relates to a line breaking device, for example of the circuit breaker type, and comprising an arc extinguishing cage as described above.

Elle va à présent être décrite plus en détail, en référence aux figures annexées, pour lesquelles :

  • la figure 1 est une vue en perspective d'une cage d'extinction d'arc électrique selon l'invention ;
  • la figure 2 représente une autre vue en perspective de la même cage, avec trois tôles de sectionnement d'arc inférieur en position d'insertion. dans l'enveloppe isolante ;
  • la figure 3 montre en perspective pièce formant borne et intégrant le contact fixe ;
  • la figure 4 est une vue de côté de ladite borne installée en partie basse d'une cage d'extinction d'arc selon l'invention ;
  • la figure 5 est une vue de face de l'enveloppe isolante ;
  • la figure 6 est une vue en perspective de ladite enveloppe ;
  • la figure 7 représente, en perspective, une tôle de sectionnement d'arc selon l'invention ;
  • la figure 8 est une vue en perspective d'une tôle de sectionnement d'arc munie d'un nez d'accrochage de l'arc ;
  • les figures 9 et 10 représentent deux vues de côté de la cage d'extinction d'arc selon l'invention ;
  • les figures 11 a et 11 b représentent deux coupes longitudinales médianes des cages d'extinction d'arc munies de leur couvercle d'une part et auxquels est fixée la borne intégrant le contact fixe, respectivement dans l'hypothèse de l'utilisation d'une tôle supérieure à nez d'accrochage et sans cette tôle ;
  • la figure 12 montre, en perspective éclatée, l'enveloppe isolante, son couvercle et la borne intégrant le contact fixe ;
  • la figure 13 est une vue en coupe AA telle qu'apparaissant en figure 5 ; et
  • les figures 14 et 15 représentent deux vues en section avec les tôles de sectionnement d'arc de part et d'autre de la ligne de coupe AA.
It will now be described in more detail, with reference to the appended figures, for which:
  • the figure 1 is a perspective view of an arc extinction cage according to the invention;
  • the figure 2 represents another perspective view of the same cage, with three lower arc cutting plates in the insertion position. in the insulating envelope;
  • the figure 3 perspective watch forming a terminal and incorporating the fixed contact;
  • the figure 4 is a side view of said terminal installed in the lower part of an arc extinguishing cage according to the invention;
  • the figure 5 is a front view of the insulating envelope;
  • the figure 6 is a perspective view of said envelope;
  • the figure 7 represents, in perspective, an arc cutting sheet according to the invention;
  • the figure 8 is a perspective view of an arc cutting sheet provided with an attachment nose of the arc;
  • the Figures 9 and 10 represent two side views of the arc extinguishing cage according to the invention;
  • the figures 11 a and 11b represent two median longitudinal sections of the arc extinction cages provided with their cover on the one hand and to which is fixed the terminal integrating the fixed contact, respectively assuming the use of a top plate with hooking nose and without this sheet;
  • the figure 12 shows, in exploded perspective, the insulating envelope, its cover and the terminal integrating the fixed contact;
  • the figure 13 is a sectional view AA as appearing in figure 5 ; and
  • the Figures 14 and 15 represent two sectional views with the arc cutting plates on either side of the cutting line AA.

En référence à la figure 1, l'enveloppe isolante (1) comporte un empilement de tôles de sectionnement d'arc (2), en l'espèce au nombre de 9. Ces tôles (2) sont configurées de telle manière qu'elles puissent se clipser par insertion dans le sens de la flèche F (figure 2), notamment par coopération de créneaux de guidage latéraux (voir figures 7 et 8) dans des orifices pratiqués dans les parois latérales (3, 3') de l'enveloppe isolante. (1).With reference to the figure 1 , the insulating envelope (1) comprises a stack of arc cutting plates (2), in this case 9 in number. These plates (2) are configured in such a way that they can be clipped by insertion into the direction of arrow F ( figure 2 ), in particular by cooperation of lateral guide slots (see Figures 7 and 8 ) in orifices in the side walls (3, 3 ') of the insulating envelope. (1).

La figure 3 représente une pièce unique (4) formant à la fois borne de connexion et contact fixe (6) et, par l'intermédiaire d'une tôle de conduction d'arc (5), découpée à l'intérieur d'une portion contenant le contact fixe (6), des moyens de s'ajuster à l'extrémité inférieur de l'enveloppe (1). L'assemblage relatif de cette borne (4) à l'enveloppe isolante (1) apparaît en figuré (4). La figure 5 montre les logements (7, 7') des tôles (2) situés de part et d'autre d'un espace libre (E) à l'intérieur duquel se déplace le contact mobile (non représenté) lorsqu'il s'est détaché du contact fixe (6). Ledit contact mobile pivote en fait à l'intérieur de l'espace (E), en restant sensiblement parallèle aux tôles (2). Celles-ci sont empilées en éventail dans l'enveloppe isolante, comme cela apparaît notamment dans les figures 1 et 2.The figure 3 represents a single piece (4) forming both a connection terminal and a fixed contact (6) and, via an arc conduction plate (5), cut inside a portion containing the fixed contact (6), means for fitting at the lower end of the envelope (1). The relative assembly of this terminal (4) to the insulating envelope (1) appears in the figure (4). The figure 5 shows the housings (7, 7 ') of the sheets (2) situated on either side of a free space (E) inside which the moving contact (not shown) moves when it has detached itself fixed contact (6). Said movable contact actually pivots inside the space (E), remaining substantially parallel to the sheets (2). These are stacked in a fan in the insulating envelope, as appears in particular in the Figures 1 and 2 .

Les logements (7), servant de butée axiale aux tôles de sectionnement d'arc (2), apparaissent plus précisément en figure 6. Le positionnement desdites tôles (2) est également réalisé par des rainures trapézoïdales latérales (8) dont une sur deux comporte un orifice (9) débouchant à l'extérieur de la paroi latérale (3). La paroi (3') comporte de la même manière des rainures trapézoïdales (8') dont une sur deux est munie d'un orifice (9'). En d'autres termes, il existe une rainure trapézoïdale (8, 8') pour chaque logement (7'), alors qu'un orifice traversant (9, 9') n'existe que dans une rainure (8, 8') sur deux. Il est à noter que ces orifices sont décalés d'une paroi latérale (3) à l'autre paroi latérale (3'), de sorte qu'il n'y a jamais deux orifices (9, 9') face à face.The housings (7) serving as an axial stop for the arc cutting plates (2) appear more precisely in figure 6 . The positioning of said sheets (2) is also achieved by lateral trapezoidal grooves (8), one of which has an orifice (9) opening out of the side wall (3). The wall (3 ') comprises in the same manner trapezoidal grooves (8'), one of which is provided with an orifice (9 '). In other words, there is a trapezoidal groove (8, 8 ') for each housing (7'), whereas a through hole (9, 9 ') exists only in a groove (8, 8') On two. It should be noted that these orifices are offset from one side wall (3) to the other side wall (3 '), so that there are never two orifices (9, 9') facing each other.

Les tôles (2), telles que représentées en figure 7, sont insérées de manière à aller en butée au fond des logements (7, 7'), les deux branches (10, 10') de la structure en U de ces tôles (2) ménageant entre elles un espace libre (E) permettant le pivotement du contact mobile à l'ouverture. Les tôles (2) présentent sur chaque côté un créneau de guidage latéral (11, 11'), dont l'un est muni d'une excroissance de clipsage (12). Cette excroissance (12), en pénétrant dans les orifices (9, 9'), permet le clipsage de chaque tôle dans l'enveloppe isolante (1). Compte tenu du décalage entre les orifices (9, 9'), il est nécessaire de retourner une tôle sur deux de telle sorte que l'éxcroissance (12) se retrouve alternativement du côté de la paroi latérale (3) et de la paroi latérale (3'). Selon une configuration de cage de l'invention, toutes les tôles de l'empilement sont identiques. Alternativement, la tôle placée tout en haut peut comporter un nez d'accrochage (13) permettant de réduire l'usure du bout du contact mobile. Une telle tôle est montrée en figure 8.The sheets (2), as represented in figure 7 , are inserted so as to abut the bottom of the housings (7, 7 '), the two branches (10, 10') of the U-shaped structure of these sheets (2) forming between them a free space (E) allowing the pivoting of the movable contact at the opening. The plates (2) have on each side a lateral guide slot (11, 11 '), one of which is provided with a clipping protrusion (12). This protrusion (12), penetrating into the orifices (9, 9 '), allows the clipping of each sheet in the insulating envelope (1). Given the offset between the orifices (9, 9 '), it is necessary to turn one plate over two so that the growth (12) is found alternately on the side of the side wall (3) and the side wall (3 '). According to a cage configuration of the invention, all the sheets of the stack are identical. Alternatively, the sheet placed at the top may include a hooking nose (13) to reduce the wear of the tip of the movable contact. Such a sheet is shown in figure 8 .

Les figures 9 et 10 montrent successivement des vues de la paroi latérale, (3') et de la paroi latérale (3) permettant de se rendre compte de. l'empilement en éventail avec le positionnement relatif de chaque tôle de sectionnement d'arc (2) par rapport aux ouvertures (9, 9'). Ce positionnement relatif sera explicité plus en détail en référence aux figures 13 à 15.The Figures 9 and 10 show successively views of the side wall, (3 ') and the side wall (3) to be aware of. fan stacking with the relative positioning of each arc cutting plate (2) with respect to the openings (9, 9 '). This relative positioning will be explained in more detail with reference to Figures 13 to 15 .

En figure 9, les créneaux (11) avec leur excroissance de clipsage (12) apparaissent dans les orifices (9'). De même, en figure 10, les mêmes créneaux de guidage latéral (11) avec leur excroissance de clipsage (12) apparaissent dans les orifices (9).In figure 9 , the crenellations (11) with their clipping protuberance (12) appear in the orifices (9 '). Similarly, figure 10 , the same lateral guide slots (11) with their clipping protuberance (12) appear in the orifices (9).

L'empilement en éventail des tôles de sectionnement d'arc (2) apparaît encore plus clairement dans les figures 11 a et 11 b, la première comportant une tôle supérieure dotée d'une configuration telle que celle qui est montrée en figure 8, avec un nez d'accrochage (13). Il a été mentionné que l'enveloppe isolante (1) comporte un couvercle (14), qui apparaît également sur ces figures. Elles montrent enfin le positionnement relatif précis de la pièce à la borne (4) et contact fixe (6) avec sa patte (5) formant tôle de pied d'arc, disposée sensiblement parallèlement à la tôle de sectionnement d'arc (2) situé immédiatement au-dessus d'elle Les sections faisant l'objet des figures 11 a et 11 b étant médianes, elles montrent également bien l'espace (E) dans lequel se déplace le contact mobile (15), représenté uniquement dans la figure 11a.The fan stacking of arc cutting plates (2) appears even more clearly in the figures 11 a and 11b, the first having an upper plate having a configuration such as that shown in figure 8 , with a hooking nose (13). It has been mentioned that the insulating envelope (1) has a cover (14), which also appears in these figures. Finally, they show the precise relative positioning of the workpiece at the terminal (4) and the fixed contact (6) with its tab (5) forming an arch foot, arranged substantially parallel to the arc cutting sheet (2). located immediately above it The sections subject to the figures 11 a and 11 b being median, they also show the space (E) in which the moving contact (15) moves, represented only in the figure 11a .

L'ensemble constitué de l'enveloppe isolante (1), du..couvercle (14) et de la pièce unitaire formant borne (4), contact fixe (6) et tôle de pied d'arc (5) est montré en figure (12), en vue éclatée. Cette figure montre l'existence en partie inférieure de l'enveloppe isolante (1), d'un muret U (16) entourant la patte (5) formant la tôle de pied d'arc. Ce muret (16) permet de protéger ladite tôle (5) de pied d'arc.The assembly consisting of the insulating envelope (1), the.cover (14) and the unitary piece forming a terminal (4), a fixed contact (6) and an arch foot plate (5) are shown in FIG. figure (12 ), exploded view. This figure shows the existence in the lower part of the insulating casing (1), a wall U (16) surrounding the tab (5) forming the foot of bow sheet. This wall (16) protects the said sheet metal (5) arch.

La figure 13, qui est une section au niveau des flèches AA de la figure 5, montre bien le positionnement relatif des logements (7) et des rainures (8) trapézoïdale, comportant le cas échéant.des orifices traversants (9).The figure 13 , which is a section at the arrows AA of the figure 5 , shows the relative positioning of the housings (7) and the grooves (8) trapezoidal, including if necessary.through orifices (9).

Pour chaque rainure trapézoïdale (8) il existe, dans le prolongement vers l'intérieur, un logement (7). Les parois de ce logement sont également d'allure trapézoïdale, à la mesure de la forme de la rainure correspondante (8).For each trapezoidal groove (8) there is, in the extension inwards, a housing (7). The walls of this housing are also trapezoidal, to the extent of the shape of the corresponding groove (8).

Lorsque les tôles de sectionnement (2) sont insérées dans les logements (7), elles viennent en butée au fond de ces logements (7). Leur positionnement précis est donné par coopération entre les créneaux latéraux (11), apparaissant également en section dans la figure 14 et la forme de la rainure (8) trapézoïdale. Les deux grands côtés du trapèze de chaque rainure (8) convergent en fait vers les arêtes de la face frontale intérieure de chaque créneau (11), permettant le positionnement de la tôle (2). L'existence de l'excroissance (12) permet, outre le clipsage au moment de l'entrée, d'empêcher les tôles de ressortir.When the cutting plates (2) are inserted into the housings (7), they abut the bottom of these housings (7). Their precise positioning is given by cooperation between the lateral crenels (11), also appearing in section in the figure 14 and the shape of the trapezoidal groove (8). The two long sides of the trapezium of each groove (8) converge in fact towards the edges of the inner end face of each slot (11), allowing the positioning of the sheet (2). The existence of the protrusion (12) allows, in addition to the clipping at the time of entry, to prevent the sheets out.

On note également, en référence à la figure 15, que l'une des parois de chaque logement (7) est dans le prolongement, c'est-à-dire dans le même plan, que l'une des parois de chaque rainure trapézoïdale (8).We also note, with reference to figure 15 , that one of the walls of each housing (7) is in the extension, that is to say in the same plane, as one of the walls of each trapezoidal groove (8).

En somme, l'un des grands côtés de chacun des deux trapèzes, celui constituant les rainures (8) et celui constituant les logements (7), est placé dans l'alignement de celui de l'autre. Le positionnement des tôles de sectionnement d'arc (2) est ainsi fermement assuré.In short, one of the long sides of each of the two trapezes, that constituting the grooves (8) and the one constituting the housings (7), is placed in alignment with that of the other. The positioning of the arc cutting plates (2) is thus firmly ensured.

Claims (8)

  1. An electric arc extinction cage that is created at the opening between a mobile contact (15) and a fixed contact (6) of an electric device for cutting off at least one line of the circuit breaker type, comprising a stack of arc sectioning sheets (2) inserted fanned out in an enclosure (1) made from an insulating material, each sheet (2) being in the shape of a U then being oriented substantially perpendicular to the travel of the mobile contact (15) pivoting between the branches (10, 10') of the Us, characterized in that:
    - the sectioning sheets (2) have, on each side, a lateral guiding notch (11, 11'), one being provided with a clipping protuberance (12);
    - housings (7, 7') for the free ends of the sheets (2) are provided in the enclosure (1), on either side of the space (E) in which the mobile contact (15) moves, said housings (7, 7') having, in section parallel to the travel of said contact (15), a trapezoidal shape whereof the small base constitutes the bottom of the housing (7, 7') forming an axial stop to the insertion of the sheets (2);
    - trapezoidal grooves (8, 8') are formed at the same level in both inner surfaces of the side walls (3, 3') of the enclosure (1), said grooves (8, 8') emerging in the opening of the enclosure (1) through which the sheets (2) are inserted and positioning the sheets (2) abutting by cooperation of the lateral guiding notches (11, 11') with the convergent walls of the grooves (8, 8');
    - trapezoidal orifices (9, 9') passing through the side walls (3, 3') of the enclosure (1) are formed in every other groove (8, 8'), with a shift from one wall (3) to the other (3') of the enclosure (1), said orifices (9, 9') being defined on three sides by the grooves (8, 8'), the fourth proximal side of the opening of the enclosure (1) being parallel to the bottom of the housing (7, 7') corresponding to the grooves (8, 8') and intended to cooperate with the clipping protuberances (12) to block the sheet (2).
  2. The arc extinction cage according to the preceding claim, characterized in that one wall of the housing (7, 7') and a wall of the grooves (8, 8') are in the same plane.
  3. The arc extinction cage according to one of the preceding claims, characterized in that the arc sectioning sheets (2) are identical.
  4. The arc extinction cage according to one of claims 1 and 2, characterized in that the arc sectioning sheets (2) are identical with the exception of the distal sheet of the fixed contact (6), which is provided with a catching beak (13) of the arc positioned between its branches (10, 10').
  5. The arc extinction cage according to any one of the preceding claims, characterized in that it comprises a single-unit piece (4) forming a terminal extended by a portion placed at one of the ends of the enclosure (1) comprising the fixed contact (6), said portion comprising an arc root sheet in the form of a lug (5) adjacent to the fixed contact (6), whereof the inside is cut out and protruding from said portion.
  6. The arc extinction cage according to the preceding claim, characterized in that the enclosure (1) comprises a low wall (16) in the shape of a U surrounding said lug (5) and insulating the arc.
  7. The arc extinction cage according to any one of the preceding claims, characterized in that the enclosure (1) comprises a closing lid (14) placed on the side of the connection terminal.
  8. An electrical line cutoff device of the circuit breaker type, characterized in that it comprises an arc extinction cage according to the preceding claims.
EP09769542A 2008-06-27 2009-06-26 Arc extinction cage Active EP2304755B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0854363A FR2933230B1 (en) 2008-06-27 2008-06-27 ARC EXTINGUISHING CAGE
PCT/FR2009/051235 WO2009156701A1 (en) 2008-06-27 2009-06-26 Arc extinction cage

Publications (2)

Publication Number Publication Date
EP2304755A1 EP2304755A1 (en) 2011-04-06
EP2304755B1 true EP2304755B1 (en) 2012-03-07

Family

ID=40040036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09769542A Active EP2304755B1 (en) 2008-06-27 2009-06-26 Arc extinction cage

Country Status (7)

Country Link
EP (1) EP2304755B1 (en)
JP (1) JP5203509B2 (en)
CN (1) CN102138193B (en)
AT (1) ATE548744T1 (en)
BR (1) BRPI0910151B1 (en)
FR (1) FR2933230B1 (en)
WO (1) WO2009156701A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102509676B (en) * 2011-10-28 2014-12-03 常熟瑞特电气股份有限公司 Framework circuit breaker arc extinguishing chamber
CN104576250A (en) * 2015-01-23 2015-04-29 常熟开关制造有限公司(原常熟开关厂） Arc extinguish chamber structure of disconnector
CN109559946A (en) * 2017-09-27 2019-04-02 常熟开关制造有限公司(原常熟开关厂） A kind of breaker
RU208385U1 (en) * 2021-07-29 2021-12-16 Общество с ограниченной ответственностью "ЭЛЕКТРОРЕШЕНИЯ" ARC EXTINGUISHING CHAMBER

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US2160681A (en) * 1937-12-30 1939-05-30 Westinghouse Electric & Mfg Co Circuit interrupter
JPS57161749U (en) * 1981-03-31 1982-10-12
JPS6215750U (en) * 1985-07-12 1987-01-30
JPS6326949U (en) * 1986-08-05 1988-02-22
JPH0343921A (en) * 1989-07-12 1991-02-25 Mitsubishi Electric Corp Circuit breaker
US5589672A (en) * 1994-06-14 1996-12-31 Fuji Electric Co., Ltd. Circuit breaker with arc quenching device and vent
JP3216776B2 (en) * 1994-06-14 2001-10-09 富士電機株式会社 Circuit breaker
IT1314358B1 (en) * 1999-12-31 2002-12-09 Abb Ricerca Spa ARC CHAMBER FOR LOW VOLTAGE SWITCHES
US20050263492A1 (en) * 2004-05-28 2005-12-01 Siemens Energy & Automation, Inc. Molded arc chute
CN2762330Y (en) * 2004-07-23 2006-03-01 浙江正泰电器股份有限公司 Arc-chutes of low-voltage circuit breaker
CN2743961Y (en) * 2004-11-11 2005-11-30 常熟开关制造有限公司(原常熟开关厂） Arc extinguishing device for circuit breaker
CN2899092Y (en) * 2006-01-25 2007-05-09 大全集团有限公司 Arc-extinguishing grid and arc-extinguishing chamber for circuit breaker
CN2938361Y (en) * 2006-03-18 2007-08-22 天正集团有限公司 Arc-control device of small circuit breaker

Also Published As

Publication number Publication date
CN102138193A (en) 2011-07-27
BRPI0910151B1 (en) 2018-12-04
FR2933230B1 (en) 2010-06-11
EP2304755A1 (en) 2011-04-06
FR2933230A1 (en) 2010-01-01
ATE548744T1 (en) 2012-03-15
CN102138193B (en) 2014-01-22
JP2011526059A (en) 2011-09-29
WO2009156701A1 (en) 2009-12-30
JP5203509B2 (en) 2013-06-05
BRPI0910151A2 (en) 2016-06-14

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