EP2593954B2 - A cutoff chamber device for two electrodes of confined contact - Google Patents

A cutoff chamber device for two electrodes of confined contact Download PDF

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Publication number
EP2593954B2
EP2593954B2 EP11730684.5A EP11730684A EP2593954B2 EP 2593954 B2 EP2593954 B2 EP 2593954B2 EP 11730684 A EP11730684 A EP 11730684A EP 2593954 B2 EP2593954 B2 EP 2593954B2
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EP
European Patent Office
Prior art keywords
electrodes
collars
openings
continuous
contact
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EP11730684.5A
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German (de)
French (fr)
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EP2593954A1 (en
EP2593954B1 (en
Inventor
Joël Ozil
René ROSSET
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General Electric Technology GmbH
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Alstom Technology AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • a primary object of the invention is to limit the heating of the electrodes during ordinary operation of the device, the contacts being closed, despite the confinement for which the cover is responsible.
  • the collars are for this purpose provided with continuous partitions extending projecting in the radial direction, which separate the openings from the neighboring volumes where the hot gases are released and which thus house the openings: the volume surrounding the cover is almost not invaded by hot gases, which therefore have no possibility of crossing it.
  • the invention can be improved in several other aspects. If the collars each include a support ring on the contact carriers and an interior portion supporting the main portion of the cover, the continuous partitions being joined to the support rings and the openings extending between the continuous partitions and the interior portions , a front sleeve can be joined to the continuous partition, surrounding the inner portion, the openings then also extending between the inner portion and the front sleeve: the front sleeve contributes to sheltering the openings even better, while favoring the hold equipment dielectric.
  • the interior portions of the collars may also carry a field electrode, the field electrodes surrounding the contact electrodes and the openings also extending between the contact electrodes and the field electrodes.
  • the openings extend to an angular portion of one of the collars and to an angular portion opposite to the previous one of the other of the collars.
  • the openings (47) of one of the collars (31) are located at the top, and the openings (48) of the other of the collars (32) are located at the bottom, or more generally the openings of the collars are placed only at opposite angular sectors on the circumferences of the collars (31 and 32), which imposes a diagonal path for the ventilation gas, passing through the middle of the interior volume (57), and guarantees good ventilation.
  • This variant can be achieved by adding plugs (61 and 62) filling the sections of the other openings between the ribs (41 and 42).

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  • Circuit Breakers (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

L'invention présente a trait à un appareillage de chambre de coupure pour deux électrodes de contact confinées, notamment dans des disjoncteurs ou interrupteurs de matériels à haute tension.The present invention relates to arcing chamber equipment for two confined contact electrodes, in particular in circuit breakers or switches of high-voltage equipment.

De nombreux appareillages comprennent un capot isolateur joignant l'un à l'autre les porte-contact dans lesquels les électrodes de contact coulissent et qui entoure ces électrodes. Une fonction principale de ce capot isolateur est de maintenir une bonne coaxialité des électrodes et de faciliter ainsi les manœuvres d'ouverture et de refermeture des contacts. Leur emploi est notamment fréquent avec des électrodes disposées sur un axe horizontal, que les forces de gravité peuvent faire fléchir. Un tel appareillage est connu du document EP 0 836 209 A2 . Et JP 2 507 987 Y2 est le document le plus proche de l'invention, conforme au préambule de la revendication 1.Many devices include an insulator cover joining together the contact carriers in which the contact electrodes slide and which surrounds these electrodes. A main function of this insulator cap is to maintain good coaxiality of the electrodes and thus to facilitate the opening and closing maneuvers of the contacts. Their use is particularly frequent with electrodes arranged on a horizontal axis, which the forces of gravity can cause to bend. Such an apparatus is known from the document EP 0 836 209 A2 . And JP 2 507 987 Y2 is the document closest to the invention, in accordance with the preamble of claim 1.

Des difficultés particulières apparaissent toutefois dans le volume confiné par le capot. L'échauffement produit par la circulation du courant d'une électrode à l'autre limite tout d'abord le courant nominal passant par l'installation. La situation est encore plus difficile à l'ouverture des électrodes de contact, puisqu'un arc électrique apparaît brièvement et produit un grand échauffement, et une surpression conséquente, du gaz environnant l'arc, qui peut faire exploser le capot.However, particular difficulties arise in the volume confined by the cover. The heating produced by the flow of current from one electrode to the other firstly limits the rated current flowing through the installation. The situation is even more difficult when the contact electrodes are opened, since an electric arc appears briefly and produces great heating, and a consequent overpressure, of the gas surrounding the arc, which can cause the cover to explode.

Une mesure connue consiste à disposer des ouvertures à l'arrière des électrodes pour évacuer les gaz en surpression trop forte que l'arc électrique produit à l'ouverture des contacts. Les gaz chauds se retrouvent alors dans le volume environnant les électrodes et autour du capot.A known measure consists in arranging openings at the rear of the electrodes to evacuate the overpressured gases produced by the electric arc when the contacts are opened. The hot gases are then found in the volume surrounding the electrodes and around the cover.

Un but premier de l'invention est de limiter l'échauffement des électrodes pendant le service ordinaire de l'appareil, les contacts étant fermés, malgré le confinement dont le capot est responsable.A primary object of the invention is to limit the heating of the electrodes during ordinary operation of the device, the contacts being closed, despite the confinement for which the cover is responsible.

L'invention est relative à un appareillage de chambre de coupure comprenant deux électrodes de contact mobiles entre une position de fermeture et une position d'ouverture, deux porte-contact soutenant les électrodes et un capot joignant les porte-contact et entourant des portions en regard des électrodes, le capot comprenant une portion principale diélectrique et deux colliers raccordant des extrémités de la portion principale aux porte-contact, caractérisé en ce que les colliers sont munis d'ouvertures faisant communiquer un volume intérieur au capot et un volume extérieur entourant le volume intérieur.The invention relates to arcing chamber apparatus comprising two contact electrodes movable between a closed position and an open position, two contact carriers supporting the electrodes and a cover joining the contact carriers and surrounding portions in regard to the electrodes, the cover comprising a main dielectric portion and two collars connecting the ends of the main portion to the contact carriers, characterized in that the collars are provided with openings communicating an interior volume to the cover and an exterior volume surrounding the interior volume.

Les ouvertures sont ménagées à travers les colliers, qui peuvent être en matière conductrice facile à usiner, autorisant une convection du gaz à travers le capot, et donc un renouvellement continuel du gaz chaud intérieur au capot par du gaz extérieur plus frais. Il faut souligner que la disposition des ouvertures à travers les colliers plutôt que la portion principale du capot confère des avantages marqués : les ouvertures peuvent être créées facilement dans les colliers, soit par usinage, les colliers étant souvent métalliques, soit dès la fabrication des colliers, par moulage ou un autre procédé, si les colliers sont métalliques ou en matière polymère ou composite, tout en maintenant une résistance mécanique suffisante grâce à une plus grande liberté de conception des colliers ; alors que percer la portion principale du capot, ce qui semblait plus indiqué puisqu'elle est un cylindre plus mince et donnant sur le centre du volume confiné, eût en réalité entraîné des inconvénients plus importants, puisque cette portion principale est la plus faible du capot, et qu'elle est normalement construite en fibres isolantes : son perçage affecterait forcément la résistance mécanique du capot dans son ensemble, ainsi que sa résistance diélectrique, les pointes des fibres coupées par l'usinage pouvant favoriser des chemins d'écoulement d'électricité.The openings are provided through the collars, which may be made of a conductive material that is easy to machine, allowing convection of the gas through the cowl, and therefore continuous renewal of the hot gas inside the cowl by cooler outside gas. It should be noted that the arrangement of the openings through the collars rather than the main portion of the cover confers marked advantages: the openings can be easily created in the collars, either by machining, the collars often being metallic, or from the manufacture of the collars , by molding or another process, if the collars are metallic or made of polymer or composite material, while maintaining sufficient mechanical strength thanks to greater freedom of collar design; while piercing the main portion of the cowl, which seemed more appropriate since it is a thinner cylinder and facing the center of the confined volume, would in reality have led to greater disadvantages, since this main portion is the weakest of the cowl , and that it is normally made of insulating fibers: its drilling would inevitably affect the mechanical strength of the cover as a whole, as well as its dielectric strength, the tips of the fibers cut by machining being able to favor electricity flow paths .

Une autre difficulté apparaît avec la situation, évoquée plus haut, d'évacuation des gaz chauds produits par l'arc dans le volume environnant le capot : ces gaz risquent d'entrer dans le volume confiné par le capot à travers les ouvertures et de produire des réamorçages d'arcs entre les électrodes à cause de leur haute teneur en plasma. Elle peut toutefois être évitée aussi dans des réalisations préférées de l'invention, en abritant les ouvertures des courants de ces gaz chauds, ce qui est facile si les ouvertures sont aux extrémités du capot, dans les colliers, et eût été plus difficile avec des ouvertures au centre du capot, à la jonction des électrodes où le volume environnant doit être dégagé. Selon une disposition préférée correspondante, les colliers sont à cet effet pourvus de cloisons continues s'étendant en saillie en direction radiale, qui séparent les ouvertures des volumes avoisinants où les gaz chauds sont relâchés et qui abritent ainsi les ouvertures : le volume environnant le capot n'est presque pas envahi par les gaz chauds, qui n'ont donc pas la possibilité de le traverser.Another difficulty arises with the situation, mentioned above, of evacuation of the hot gases produced by the arc in the volume surrounding the cover: these gases risk entering the volume confined by the cover through the openings and producing re-ignitions of arcs between the electrodes because of their high plasma content. It can however also be avoided in preferred embodiments of the invention, by sheltering the openings from the currents of these hot gases, which is easy if the openings are at the ends of the cover, in the collars, and would have been more difficult with openings in the center of the cover, at the junction of the electrodes where the surrounding volume must be cleared. According to a corresponding preferred arrangement, the collars are for this purpose provided with continuous partitions extending projecting in the radial direction, which separate the openings from the neighboring volumes where the hot gases are released and which thus house the openings: the volume surrounding the cover is almost not invaded by hot gases, which therefore have no possibility of crossing it.

L'invention peut être perfectionnée sous plusieurs autres aspects. Si les colliers comprennent chacun une bague de support sur les porte-contact et une portion intérieure de support de la portion principale du capot, les cloisons continues étant jointes aux bagues de support et les ouvertures s'étendant entre les cloisons continues et les portions intérieures, une douille antérieure peut être jointe à la cloison continue, en entourant la portion intérieure, les ouvertures s'étendant alors aussi entre la portion intérieure et la douille antérieure : la douille antérieure contribue à abriter encore mieux les ouvertures, tout en favorisant la tenue diélectrique de l'appareillage.The invention can be improved in several other aspects. If the collars each include a support ring on the contact carriers and an interior portion supporting the main portion of the cover, the continuous partitions being joined to the support rings and the openings extending between the continuous partitions and the interior portions , a front sleeve can be joined to the continuous partition, surrounding the inner portion, the openings then also extending between the inner portion and the front sleeve: the front sleeve contributes to sheltering the openings even better, while favoring the hold equipment dielectric.

Dans une construction commode, les portions intérieures sont assemblées aux cloisons continues (par un moyen distinct tel que des vis) et les ouvertures s'étendent entre des nervures établies sur les cloisons continues et sur lesquelles s'appuient les portions intérieures.In a convenient construction, the interior portions are joined to the continuous partitions (by a separate means such as screws) and the openings extend between ribs established on the continuous partitions and on which the interior portions rest.

Les douilles antérieures peuvent comprendre un bourrelet arrondi saillant vers la portion principale du capot à une extrémité libre.The front sockets may include a rounded bead projecting towards the main portion of the cover at a free end.

Dans un agencement privilégié, les porte-contact comprennent chacun une bordure extérieure délimitant un trajet d'écoulement de gaz à partir d'une extrémité postérieure évidée des électrodes, les bordures s'ouvrant devant les parois continues, et les colliers comprennent une douille postérieure jointe à la cloison continue et entourant une extrémité des bordures extérieures. Cette disposition permet d'intercepter les gaz chauds provenant des électrodes quand l'arc est formé par les cloisons continues, et de les dévier en les éloignant du capot et de la zone de jonction des électrodes.In a preferred arrangement, the contact carriers each comprise an outer border delimiting a gas flow path from a recessed posterior end of the electrodes, the rims opening in front of the continuous walls, and the collars include a posterior sleeve joined to the continuous partition and surrounding one end of the outer rims. This arrangement makes it possible to intercept the hot gases coming from the electrodes when the arc is formed by the continuous partitions, and to deflect them by moving them away from the cover and from the junction zone of the electrodes.

Les portions intérieures des colliers peuvent encore porter une électrode de champ, les électrodes de champ entourant les électrodes de contact et les ouvertures s'étendant aussi entre les électrodes de contact et les électrodes de champ.The interior portions of the collars may also carry a field electrode, the field electrodes surrounding the contact electrodes and the openings also extending between the contact electrodes and the field electrodes.

Selon une disposition privilégiée, qui peut favoriser la qualité de la convection de l'écoulement, les ouvertures s'étendent à une portion angulaire d'un des colliers et à une portion angulaire opposée à la précédente de l'autre des colliers.According to a preferred arrangement, which can promote the quality of the convection of the flow, the openings extend to an angular portion of one of the collars and to an angular portion opposite to the previous one of the other of the collars.

L'invention sera maintenant décrite en détail en liaison aux figures suivantes :

  • la figure 1 illustre une première réalisation de l'invention à l'état d'ouverture des contacts,
  • la figure 2, une variante de cette réalisation,
  • la figure 3, une vue en perspective d'un collier,
  • et la figure 4, une vue de l'invention à l'état de fermeture des contacts.
The invention will now be described in detail in connection with the following figures:
  • the figure 1 illustrates a first embodiment of the invention in the open state of the contacts,
  • the figure 2 , a variant of this embodiment,
  • the picture 3 , a perspective view of a necklace,
  • and the figure 4 , a view of the invention in the closed state of the contacts.

On considère d'abord la figure 1, ainsi que la figure 4. La chambre de coupure comprend une électrode de contact (1) mobile, et une électrode de contact (2) fixe coaxiale à la précédente. Les électrodes (1 et 2) sont soutenues par des porte-contact (3 et 4) fixes qui comprennent notamment des manchons (5 et 6) dans lesquels les électrodes (1 et 2) sont engagées et qui sont munis de lamelles élastiques (7 et 8) de connexion électrique aux électrodes (1 et 2). Elles comprennent des passages (9 et 10) à des parties postérieures, qui débouchent dans des chambres internes aux manchons (5 et 6), puis, par d'autres passages (11 et 12) à travers des manchons (5 et 6), à des chambres annulaires (13 et 14) s'étendant entre les manchons (5 et 6) à l'intérieur et des bordures cylindriques (15 et 16) à l'extérieur, qui comprennent d'ailleurs des raccordements (17 et 18) aux manchons (5 et 6) à l'arrière mais sont ouvertes à l'avant, c'est-à-dire vers l'électrode (2 ou 1) opposée. L'ensemble de l'appareillage est disposé dans une cuve non représentée. Le contenu gazeux est en général de l'hexafluorure de soufre SF6 ou un autre gaz très diélectrique.We first consider the figure 1 , as well as figure 4 . The interrupting chamber comprises a mobile contact electrode (1), and a fixed contact electrode (2) coaxial with the preceding one. The electrodes (1 and 2) are supported by fixed contact carriers (3 and 4) which include in particular sleeves (5 and 6) in which the electrodes (1 and 2) are engaged and which are provided with elastic strips (7 and 8) electrical connection to the electrodes (1 and 2). They comprise passages (9 and 10) at the rear parts, which open into internal chambers in the sleeves (5 and 6), then, by other passages (11 and 12) through the sleeves (5 and 6), to annular chambers (13 and 14) extending between the sleeves (5 and 6) on the inside and cylindrical edges (15 and 16) on the outside, which moreover comprise connections (17 and 18) to the sleeves (5 and 6) at the rear but are open at the front, that is to say towards the opposite electrode (2 or 1). All of the equipment is placed in a tank, not shown. The gas content is usually sulfur hexafluoride SF6 or another highly dielectric gas.

Les électrodes (1 et 2) présentent des portions extérieures de contact (19 et 20), ainsi que des portions intérieures de contact (21 et 22) entourées par les précédentes, qui restent en contact mutuel plus longtemps que les précédentes à l'ouverture du dispositif et entre lesquelles un arc (23) est amené à se développer à l'ouverture des contacts. Une buse de soufflage d'arc (24) en matière diélectrique relie les électrodes (1 et 2), entoure les portions intérieures de contact (21 et 22) et confine l'arc (23). Le soufflage de l'arc (23) est assuré par des moyens connus, par exemple par la détente du gaz d'abord contenu dans une chambre (25) comprimée entre une cloison (26) du manchon (5) et l'électrode (1) mobile, et qui est projeté devant l'électrode (1) vers l'arc (23) par une ouverture (27) traversant le fond de cette électrode, dès que la compression devient suffisante pour ouvrir un clapet (28) équipant cette ouverture (27).The electrodes (1 and 2) have outer contact portions (19 and 20), as well as inner contact portions (21 and 22) surrounded by the previous ones, which remain in mutual contact longer than the previous ones on opening. of the device and between which an arc (23) is caused to develop when the contacts open. An arc blow nozzle (24) of dielectric material connects the electrodes (1 and 2), surrounds the inner contact portions (21 and 22) and confines the arc (23). The blowing of the arc (23) is provided by known means, for example by expanding the gas first contained in a chamber (25) compressed between a partition (26) of the sleeve (5) and the electrode ( 1) mobile, and which is projected in front of the electrode (1) towards the arc (23) by an opening (27) passing through the bottom of this electrode, as soon as the compression becomes sufficient to open a valve (28) equipping this opening (27).

Le centrage des électrodes (1 et 2) est assuré par un capot (29) comprenant une portion principale (30) de forme cylindrique et deux colliers (31 et 32) respectivement fixés aux porte-contact (3 et 4). La portion principale (30) est diélectrique, les colliers (31 et 32) peuvent être en matière conductrice ; ils sont à peu près identiques. Chacun d'eux comprend une bague de support (33 ou 34) faisant la liaison aux manchons (5 ou 6), une cloison continue (35 ou 36) plane et s'étendant autour de la bague de support (33 ou 34), saillant au-delà de la portion principale (30) en direction radiale (perpendiculaire à l'axe des électrodes (1 ou 2)), une douille antérieure (37 ou 38) cylindrique et s'étendant à partir du bord extérieur de la cloison continue (35 ou 36) vers l'autre collier (32 ou 31), et une douille postérieure (39 ou 40) également cylindrique et opposée à la précédente, en s'étendant à partir du bord extérieur de la cloison continue (35 ou 36) vers l'arrière, et entourant l'extrémité du manchon (15 ou 16), qui arrive non loin de la cloison (35 ou 36). Des nervures (41 ou 42) - mieux visibles à la figure 3 - se dressant sur les cloisons continues (35 ou 36) du côté des douilles antérieures (37) servent de support à une portion intérieure (43 ou 44) des colliers (31 ou 32). Les extrémités de la portion principale (30) du capot (29) sont serties dans ces portions intérieures (43 et 44). Le capot (29) est unitaire, des vis (59 ou 60) unissant les portions intérieures (43 ou 44) aux cloisons continues (35 ou 36). Les portions intérieures (43 ou 44) soutiennent encore chacune une électrode de champ (45 ou 46), qui entoure l'extrémité antérieure de la portion (19 ou 20) extérieure d'une des électrodes (1 ou 2) de contact sans la toucher. Les électrodes de champ (45 et 46) sont dirigées l'une vers l'autre.The centering of the electrodes (1 and 2) is ensured by a cover (29) comprising a main portion (30) of cylindrical shape and two collars (31 and 32) respectively fixed to the contact carriers (3 and 4). The main portion (30) is dielectric, the collars (31 and 32) can be made of conductive material; they are nearly identical. Each of them comprises a support ring (33 or 34) connecting to the sleeves (5 or 6), a continuous partition (35 or 36) which is flat and extends around the support ring (33 or 34), protruding beyond the main portion (30) in the radial direction (perpendicular to the axis of the electrodes (1 or 2)), a cylindrical front sleeve (37 or 38) extending from the outer edge of the partition continues (35 or 36) towards the other collar (32 or 31), and a rear sleeve (39 or 40) also cylindrical and opposite to the previous one, extending from the outer edge of the continuous partition (35 or 36) backwards, and surrounding the end of the sleeve (15 or 16), which arrives not far from the partition (35 or 36). Ribs (41 or 42) - best visible on picture 3 - Standing on the continuous partitions (35 or 36) on the side of the front sleeves (37) serve as a support for an inner portion (43 or 44) of the collars (31 or 32). The ends of the main portion (30) of the cover (29) are crimped into these inner portions (43 and 44). The cover (29) is unitary, screws (59 or 60) uniting the interior portions (43 or 44) to the continuous partitions (35 or 36). The inner portions (43 or 44) each further support a field electrode (45 or 46), which surrounds the front end of the outer portion (19 or 20) of one of the contact electrodes (1 or 2) without the to touch. The field electrodes (45 and 46) are directed towards each other.

Le capot (29) est traversé d'ouvertures (47 ou 48) qui s'étendent à travers chaque collier (31 ou 32) et comprennent des premières portions (49 ou 50), entre la cloison continue (35 ou 36) et la portion intérieure (43 ou 44), et entre les nervures (41 ou 42), une seconde portion (51 ou 52) entre la douille antérieure (37 ou 38) et la portion intérieure (43 ou 44), et une troisième portion (53 ou 54) à l'extrémité de la douille antérieure (37 ou 38), à l'endroit d'une extrémité en bourrelet, saillant vers l'intérieur (55 ou 56) dont la forme est arrondie.The cover (29) is traversed by openings (47 or 48) which extend through each collar (31 or 32) and comprise first portions (49 or 50), between the continuous partition (35 or 36) and the inner portion (43 or 44), and between the ribs (41 or 42), a second portion (51 or 52) between the front sleeve (37 or 38) and the inner portion (43 or 44), and a third portion ( 53 or 54) at the end of the front sleeve (37 or 38), at the location of a beaded end, projecting inwards (55 or 56) whose shape is rounded.

Le fonctionnement de l'invention est le suivant. Quand les contacts sont fermés, le gaz contenu dans le capot (29) s'échauffe et une convection se produit à travers les ouvertures (47 et 48) : le gaz chaud plus léger sort du volume intérieur (57) confiné par le capot (29) par les ouvertures supérieures, et du gaz provenant du volume extérieur (58) environnant le capot (29) le remplace par les ouvertures inférieures. Une ventilation satisfaisante des électrodes (1 et 2) est ainsi obtenue.The operation of the invention is as follows. When the contacts are closed, the gas contained in the cover (29) heats up and convection occurs through the openings (47 and 48): the lighter hot gas leaves the interior volume (57) confined by the cover ( 29) through the upper openings, and gas from the volume exterior (58) surrounding the cover (29) replaces it with the lower openings. Satisfactory ventilation of the electrodes (1 and 2) is thus obtained.

Quand les contacts sont ouverts et qu'un arc (23) apparaît, les gaz chauds qu'il produit sont d'abord refoulés dans les chambres annulaires (13 et 14) puis soufflés vers les colliers (31 et 32), mais les cloisons continues (35 et 36) les arrêtent, et les douilles postérieures (39 et 40) leur font faire demi-tour et les éloignent donc du volume extérieur (58), les empêchant d'atteindre les ouvertures (47 et 48).When the contacts are open and an arc (23) appears, the hot gases which it produces are first discharged into the annular chambers (13 and 14) then blown towards the collars (31 and 32), but the partitions continuous (35 and 36) stop them, and the rear sleeves (39 and 40) make them turn around and therefore move them away from the outer volume (58), preventing them from reaching the openings (47 and 48).

Dans un mode de réalisation particulier représenté à la figure 2, les ouvertures (47) d'un des colliers (31) sont situées en haut, et les ouvertures (48) de l'autre des colliers (32) sont situées en bas, ou plus généralement les ouvertures des colliers sont placées seulement à des secteurs angulaires opposés sur les circonférences des colliers (31 et 32), ce qui impose un trajet diagonal au gaz de ventilation, passant par le milieu du volume intérieur (57), et garantit une bonne ventilation. On peut réaliser cette variante en ajoutant des bouchons (61 et 62) comblant les sections des autres ouvertures entre les nervures (41 et 42).In a particular embodiment shown in figure 2 , the openings (47) of one of the collars (31) are located at the top, and the openings (48) of the other of the collars (32) are located at the bottom, or more generally the openings of the collars are placed only at opposite angular sectors on the circumferences of the collars (31 and 32), which imposes a diagonal path for the ventilation gas, passing through the middle of the interior volume (57), and guarantees good ventilation. This variant can be achieved by adding plugs (61 and 62) filling the sections of the other openings between the ribs (41 and 42).

La figure 2 représente le mouvement de convection par les flèches (63), ainsi que les mouvements d'évacuation des gaz chauds liés à la coupure de l'arc électrique par les flèches (64 et 65). La réalisation de la figure 1 comporte encore des mouvements de convection symétriques à ceux des flèches (63).The figure 2 represents the convection movement by the arrows (63), as well as the evacuation movements of the hot gases linked to the breaking of the electric arc by the arrows (64 and 65). The realization of the figure 1 still comprises convection movements symmetrical to those of the arrows (63).

Les colliers (31 et 32) peuvent être fabriqués à bas coût par moulage d'aluminium. Les ouvertures (47, 48) sont dimensionnées assez largement pour autoriser le débit de convection souhaité. La forme sinueuse des ouvertures n'est pas particulièrement recherchée mais découle de l'existence des douilles antérieures (37, 38) et des électrodes de champ (45, 46) dans les réalisations illustrées ; des ouvertures rectilignes pourraient être choisies en l'absence de ces éléments. The collars (31 and 32) can be manufactured at low cost by aluminum casting. The openings (47, 48) are sized large enough to allow the desired convection rate. The sinuous shape of the openings is not particularly desired but results from the existence of the front sockets (37, 38) and the field electrodes (45, 46) in the embodiments illustrated; rectilinear openings could be chosen in the absence of these elements.

Claims (8)

  1. Arc-control chamber gear comprising two contact electrodes (1, 2) movable between a closed position and an open position, two contact carriers (3, 4) supporting the electrodes, and a cap (29) joining the contact carriers together and surrounding the facing portions of the electrodes, the cap comprising a main dielectric portion and two collars (31, 32) connecting the ends of the main portion to the contact carriers (3, 4), the collars being provided with openings (47, 48) causing an inside volume (57) inside the cap in which said facing portions of the electrodes extend to communicate with an outside volume (58) outside the cap and surrounding the inside volume, characterized in that each of the collars comprises a continuous partition (35, 36) projecting beyond the main portion in a radially outward direction, and the openings extend through the collars between the main portion (30) and the continuous partitions (35, 36).
  2. Gear according to claim 1, characterized in that each collar comprises a support ring (33, 34) on the corresponding contact carrier (3, 4) and an inner portion (43, 44) for supporting the main portion, the continuous partitions (35, 36) are joined to the support rings, and the openings extend between the continuous partitions and the inner portions.
  3. Gear according to claim 2, characterized in that the inner portions (43, 44) are assembled to the continuous partitions (35, 36) and the openings extend between tabs (41, 42) established on the continuous partitions and against which the inner portions bear.
  4. Gear according to claim 2 or claim 3, characterized in that each collar comprises a front bushing (37, 38) joined to the continuous partition and surrounding the inner portion, the openings also extending between the inner portion and the front bushing.
  5. Gear according to claim 4, characterized in that each front bushing (37, 38) includes, at a front end, a rounded bead (55, 56) projecting towards the main portion (30).
  6. Gear according to any one of claims 1 to 5, characterized in that each contact carrier (3, 4) has outer edging (15, 16) defining a path for gas flow from an open rear end of the corresponding electrode, the edging opening facing the corresponding continuous partition, and each collar (39, 40) having a rear bushing joined to the continuous partition and surrounding one end of the corresponding outer edging.
  7. Gear according to claim 2, characterized in that each inner portion of the collars carries a field electrode (45, 46), the field electrodes surrounding the contact electrodes (1, 2) and the openings also extending between the contact electrodes and the field electrodes.
  8. Gear according to any one of claims 1 to 7, characterized in that the openings extend over an angular portion (31) of one of the collars and over an opposite angular portion of the other collar (32) in such a manner as to impose a diagonal path on the flow of ventilation gas by convection, said path passing through a middle of the inside volume (57).
EP11730684.5A 2010-07-16 2011-07-12 A cutoff chamber device for two electrodes of confined contact Active EP2593954B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1055800A FR2962847B1 (en) 2010-07-16 2010-07-16 CUTTING CHAMBER EQUIPMENT FOR TWO CONFINED CONTACT ELECTRODES
PCT/EP2011/061818 WO2012007447A1 (en) 2010-07-16 2011-07-12 Interrupter tube switchgear for two confined contact electrodes

Publications (3)

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EP2593954A1 EP2593954A1 (en) 2013-05-22
EP2593954B1 EP2593954B1 (en) 2015-03-11
EP2593954B2 true EP2593954B2 (en) 2022-03-16

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US (1) US9524836B2 (en)
EP (1) EP2593954B2 (en)
JP (1) JP5784116B2 (en)
CN (1) CN103109339B (en)
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WO (1) WO2012007447A1 (en)

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Also Published As

Publication number Publication date
JP5784116B2 (en) 2015-09-24
EP2593954A1 (en) 2013-05-22
FR2962847B1 (en) 2012-08-17
FR2962847A1 (en) 2012-01-20
JP2013534351A (en) 2013-09-02
CN103109339A (en) 2013-05-15
CN103109339B (en) 2015-08-19
WO2012007447A1 (en) 2012-01-19
US9524836B2 (en) 2016-12-20
EP2593954B1 (en) 2015-03-11
US20130126481A1 (en) 2013-05-23

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