EP1571685B1 - Mounting device for a shield in an electrical interrupter, preferably in a vacuum interrupter - Google Patents

Mounting device for a shield in an electrical interrupter, preferably in a vacuum interrupter Download PDF

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Publication number
EP1571685B1
EP1571685B1 EP05354004A EP05354004A EP1571685B1 EP 1571685 B1 EP1571685 B1 EP 1571685B1 EP 05354004 A EP05354004 A EP 05354004A EP 05354004 A EP05354004 A EP 05354004A EP 1571685 B1 EP1571685 B1 EP 1571685B1
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EP
European Patent Office
Prior art keywords
shield
ring
fixed
screen
insulators
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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.)
Not-in-force
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EP05354004A
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German (de)
French (fr)
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EP1571685A1 (en
Inventor
Roland Schneider Electric Insustries SAS Masnada
Olivier Schneider Electric Industries S Cardoletti
Albin Schneider Electric Industries SAS Henon
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP1571685A1 publication Critical patent/EP1571685A1/en
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Publication of EP1571685B1 publication Critical patent/EP1571685B1/en
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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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations

Definitions

  • the present invention relates to a device for fixing a screen in a switch, said switch having an envelope comprising a cylindrical portion closed by two end portions forming covers, said envelope enclosing two contacts extending axially inside the the envelope of which at least one said movable contact is connected to a control mechanism and is slidably mounted between a closed position of the contacts and a position in which the contacts are separated and cause the interruption of an electrical circuit, said cylindrical portion being mechanically connected by its two free ends respectively to the two end caps and having one or more cylindrical insulator-forming parts mechanically and axially connected to each other, and at least one shield being supported by a cylindrical ring fixed between two of the aforesaid parts of the envelope connected mechanically at the level of the mechanical connection between these two parts.
  • These metal screens located inside the ceramic insulator (s) have the main role of protecting the ceramic part (s) from the condensation of metal vapors resulting from the arc phase produced between the contacts during the power failure.
  • the floating potential screen is connected to the isolator, either directly or through intermediate pieces.
  • the documents US 5,077,883 and EP 0 406 944 describe a screen connected to the isolator directly, by deforming the screen around a generally asymmetrical protrusion of the insulator.
  • the document EP 1 172 834 describes a screen connected to the insulator by an arrangement of intermediate parts, one of them being housed in a groove of the insulator provided for this purpose. This method of attachment substantially increases the complexity of the shape and cost of obtaining the insulator.
  • the screen thus mounted provides no electrical connection point to the outside to condition the voltage of the switch bulb.
  • the document is also known DE 25 34 954 A describing a vacuum interrupter comprising a screen attached to the casing via a curved portion towards the outside of the screen cooperating with a ring fixed in the casing of the switch.
  • the present invention provides a device for fixing a screen in a vacuum switch, simple design, requiring no intermediate parts.
  • the present invention relates to a device for fixing a screen in a switch according to claim 1.
  • the screen comprises three equidistant localized repulsing points.
  • a ring is fixed between one of the free ends of the aforementioned cylindrical portion and the cover to which this end is fixed, said ring supporting a said upper or lower screen.
  • the bulb comprising two tubular insulators placed end to end, a ring is fixed between the two insulators and supports a so-called central screen, fixed to the floating potential between the two insulators.
  • the aforementioned ring has a cross section, an L shape.
  • said ring is shaped and dimensioned so as to prevent the displacement of the screen perpendicularly to the axis of the switch.
  • the screen thus positioned is brazed to the circular ring by means of a solder rod located between the two parts.
  • the present invention also relates to a switch comprising the previously mentioned features taken alone or in combination.
  • FIG. 1 shows a vacuum interrupter 1 intended to be integrated in a circuit breaker or a medium voltage electrical switch in order to cut off an electrical circuit in the event of a fault or during a voluntary opening command. electrical circuit.
  • This bulb 1 comprises an envelope having a cylindrical portion 4,5 closed by two funds 6.7.
  • This cylindrical part is formed by two tubular ceramic insulators 4,5 and the two funds by two metal covers 6,7.
  • This envelope contains two contacts (not shown), one fixed, is integral with one 7 of the covers 6.7 and connected to said cover by an electrode 16, while the other mobile, is mounted on an electrode 17 able to move in the axis of the bulb 1 and through the other metal cap 6 to be connected to a control mechanism (not shown).
  • the movable contact is mounted to slide axially inside the envelope between a closed position of the contacts corresponding to a rest position of the circuit breaker and a position in which the contacts are separated and lead to the interruption of the electrical circuit. Sealing at the crossing is provided by means of a metal bellows 18 connecting the mobile electrode 17 to the cover 6.
  • This switch also comprises a first metal screen 11 whose main role is to protect the insulator or the insulators 4,5 of the condensation of metal vapors from the arc phase produced between the contacts during the power failure.
  • the apparatus also comprises a second screen 12 located at the junction between one 6 of the covers 6.7 and one 4 of the insulators 4,5, and a third screen 13 located at the junction between the second cover 7 and the other insulator 5.
  • Each of these screens 11, 12, 13 is supported by a circular ring 8, 9, 10 of inverted L-shaped cross section and having a portion 8a extending parallel to the axis of the bulb and a portion 8b. extending perpendicular to that axis.
  • the latter part 8b of the ring 8 is fixed between the two insulators 4,5 solder.
  • this part 8b is fixed between one 6 of the covers 6,7 and the corresponding end 4a of the insulator 4.
  • this part 8b is fixed between one of the 7 covers 6,7 and the corresponding end 5a of the insulator 5.
  • These insulators 11,12,13 insulator screens have on their outer surface, three localized points of repoussage 14 material able to bear on the circular ring 8,9,10 corresponding and ensure the translation stop translation 11,12,13 inside the bulb 1.
  • the shape and dimensions of the circular ring 8,9,10 are such that the screens can not move in the other directions ie perpendicular to the axis of the bulb.
  • the screens thus positioned are fixed to the circular ring 8, 9, 10 by vacuum brazing by means of a solder rod 15 located between the two parts.
  • a simplified fastening device for screens protecting the insulators has thus been achieved thanks to the invention, without any intermediate part between the screen and the circular ring fixed between the insulators or the insulator and one of the protective covers.
  • the translation stopping means is made in the form of at least one support made at a lower industrial cost by a localized repoussage of material on the outer surface of the the screen. It can thus rely on a copper ring, which by shaping prevents other degrees of freedom of the screen inside the bulb.
  • the localized repoussage of the material is advantageously substituted for a shaping revolution of the entire screen on the technical, technological and ecological, to achieve the same function.
  • the inner surface of the screen is not affected by the embossing method, thus preserving the dielectric qualities on the surface of the workpiece, which is a necessary condition to guarantee the electrical performance of a light bulb. vacuum switch.
  • connection between the screen and the ring does not require an intermediate piece, it is performed at the same time as the closure of the bulb, without additional soldering cycle.
  • the present invention can be used for fixing the insulators shields in different locations of the bulb. It allows both the fixing of the screen to the floating potential between two insulators that fixing screens between the insulator and one of the covers constituting the envelope of the bulb.
  • the number of pushback points is at least one to block the translational movement of the screen. Depending on the fit between the screen and the circular ring, it may be useful to increase the number of embossing points. According to the embodiment described, three localized embossing points are made, located 120 ° from each other, on the circumference of the insulator shield.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

The device has a shield (11, 12, 13) supported by a cylindrical ring with inverted L shaped cross-section fixed between one cover and two insulators mechanically connected to one another. The circular ring has a part extending in a direction parallel to the axis of the cartridge. The shield comprises on its external surface one localized material spinning point, arranged to form bearing point of the shield on the ring.

Description

La présente invention concerne un dispositif de fixation d'un écran dans un interrupteur, ledit interrupteur comportant une enveloppe comprenant une partie cylindrique fermée par deux parties d'extrémité formant des capots, ladite enveloppe renfermant deux contacts s'étendant axialement à l'intérieur de l'enveloppe dont l'un au moins dit contact mobile, est relié à un mécanisme de commande et est monté coulissant entre une position de fermeture des contacts et une position dans laquelle les contacts sont séparés et entraînent la coupure d'un circuit électrique, ladite partie cylindrique étant reliée mécaniquement par ses deux extrémités libres respectivement aux deux capots d'extrémité et comportant une ou plusieurs parties formant des isolateurs cylindriques reliés mécaniquement et axialement l'un à l'autre, et au moins un écran de protection étant supporté par un anneau cylindrique fixé entre deux des parties précitées de l'enveloppe reliées mécaniquement, au niveau de la liaison mécanique entre ces deux parties.The present invention relates to a device for fixing a screen in a switch, said switch having an envelope comprising a cylindrical portion closed by two end portions forming covers, said envelope enclosing two contacts extending axially inside the the envelope of which at least one said movable contact is connected to a control mechanism and is slidably mounted between a closed position of the contacts and a position in which the contacts are separated and cause the interruption of an electrical circuit, said cylindrical portion being mechanically connected by its two free ends respectively to the two end caps and having one or more cylindrical insulator-forming parts mechanically and axially connected to each other, and at least one shield being supported by a cylindrical ring fixed between two of the aforesaid parts of the envelope connected mechanically at the level of the mechanical connection between these two parts.

Ces écrans métalliques situés à l'intérieur du ou des isolateurs en céramique ont pour rôle principal de protéger la ou les parties céramiques de la condensation de vapeurs métalliques issues de la phase d'arc produite entre les contacts pendant la coupure du courant électrique.These metal screens located inside the ceramic insulator (s) have the main role of protecting the ceramic part (s) from the condensation of metal vapors resulting from the arc phase produced between the contacts during the power failure.

L'une des possibilités de montage de cet écran consiste à relier mécaniquement et électriquement celui-ci au capot métallique qui supporte aussi le contact fixe. Un autre montage usuel consiste à isoler électriquement l'écran des deux capots et à le mettre ainsi au potentiel flottant. Ceci permet d'améliorer sensiblement la tenue diélectrique de l'ampoule, en comparaison avec l'utilisation d'un écran au potentiel fixe.One of the possibilities of mounting this screen is to mechanically and electrically connect it to the metal cover which also supports the fixed contact. Another usual arrangement is to electrically isolate the screen of the two covers and thus put it at floating potential. This makes it possible to appreciably improve the dielectric strength of the bulb, in comparison with the use of a screen with a fixed potential.

Lorsque l'ampoule ne comporte qu'un seul isolateur en céramique, l'écran au potentiel flottant est relié à l'isolateur, soit directement, soit par le biais de pièces intermédiaires. Les documents US 5 077 883 et EP 0 406 944 décrivent un écran relié à l'isolateur directement, par déformation de l'écran autour d'une protubérance généralement asymétrique de l'isolateur. Le document EP 1 172 834 décrit un écran relié à l'isolateur par un agencement de pièces intermédiaires, l'une d'elles étant logée dans une rainure de l'isolateur prévue à cet effet. Ce mode de fixation accroît sensiblement la complexité de la forme et le coût d'obtention de l'isolateur. D'autre part, l'écran ainsi monté n'offre aucun point de connexion électrique vers l'extérieur permettant de conditionner en tension l'ampoule de l'interrupteur.When the bulb has only one ceramic insulator, the floating potential screen is connected to the isolator, either directly or through intermediate pieces. The documents US 5,077,883 and EP 0 406 944 describe a screen connected to the isolator directly, by deforming the screen around a generally asymmetrical protrusion of the insulator. The document EP 1 172 834 describes a screen connected to the insulator by an arrangement of intermediate parts, one of them being housed in a groove of the insulator provided for this purpose. This method of attachment substantially increases the complexity of the shape and cost of obtaining the insulator. On the other hand, the screen thus mounted provides no electrical connection point to the outside to condition the voltage of the switch bulb.

Pour toutes ces raisons, il est apparu intéressant de braser l'écran métallique à un anneau circulaire interposé et brasé entre deux parties en céramiques de forme cylindrique simple et de moindre coût. La liaison de cet anneau circulaire à l'écran est réalisée soit au moyen de pièces intermédiaires, tel que décrit dans le document EP 1 172 834 , soit directement par appui de l'écran sur l'anneau, tel que décrit dans le document FR 2 819 093 , ces deux dernières pièces ayant des formes complémentaires de révolution assurant d'une part, le guidage coaxial de l'écran et d'autre part, l'arrêt en translation de celui-ci. Dans le premier mode de fixation précité, il peut être nécessaire de réaliser un cycle de brasage spécifique des pièces intermédiaires sur l'écran. Dans le second cas, l'écran métallique doit comporter un épaulement de révolution réalisé par usinage ou emboutissage.For all these reasons, it appeared interesting to braze the metal screen to a circular ring interposed and soldered between two ceramic parts of simple cylindrical shape and lower cost. The connection of this circular ring to the screen is carried out either by means of intermediate parts, as described in the document EP 1 172 834 , or directly by pressing the screen on the ring, as described in the document FR 2,819,093 these two last pieces having complementary shapes of revolution ensuring firstly, the coaxial guidance of the screen and secondly, stopping in translation thereof. In the first aforementioned method of attachment, it may be necessary to perform a specific brazing cycle of the intermediate parts on the screen. In the second case, the metal screen must include a shoulder of revolution made by machining or stamping.

On connaît également le document DE 25 34 954 A décrivant un interrupteur à vide comportant un écran fixé à l'enveloppe par l'intermédiaire d'une partie bombée vers l'extérieur de l'écran coopérant avec un anneau fixé dans l'enveloppe de l'interrupteur.The document is also known DE 25 34 954 A describing a vacuum interrupter comprising a screen attached to the casing via a curved portion towards the outside of the screen cooperating with a ring fixed in the casing of the switch.

La présente invention propose un dispositif de fixation d'un écran dans un interrupteur à vide, de conception simple, ne nécessitant pas de pièces intermédiaires.The present invention provides a device for fixing a screen in a vacuum switch, simple design, requiring no intermediate parts.

A cet effet, la présente invention a pour objet un dispositif de fixation d'un écran dans un interrupteur selon la revendication 1.For this purpose, the present invention relates to a device for fixing a screen in a switch according to claim 1.

Selon une caractéristique particulière de l'invention, l'écran comporte trois points de repoussage localisés équidistants.According to a particular characteristic of the invention, the screen comprises three equidistant localized repulsing points.

Selon une autre caractéristique, un anneau est fixé entre l'une des extrémités libres de la partie cylindrique précitée et le capot auquel cette extrémité est fixée, ledit anneau supportant un écran dit supérieur ou inférieur.According to another characteristic, a ring is fixed between one of the free ends of the aforementioned cylindrical portion and the cover to which this end is fixed, said ring supporting a said upper or lower screen.

Selon une autre caractéristique, l'ampoule comportant deux isolateurs tubulaires mis bout à bout, un anneau est fixé entre les deux isolateurs et supporte un écran dit central, fixé au potentiel flottant entre les deux isolateurs.According to another characteristic, the bulb comprising two tubular insulators placed end to end, a ring is fixed between the two insulators and supports a so-called central screen, fixed to the floating potential between the two insulators.

Selon une autre caractéristique, l'anneau précité présente en coupe transversale, une forme de L.According to another feature, the aforementioned ring has a cross section, an L shape.

Selon une autre caractéristique, ledit anneau est conformé et dimensionné de manière à empêcher le déplacement de l'écran perpendiculairement à l'axe de l'interrupteur.According to another characteristic, said ring is shaped and dimensioned so as to prevent the displacement of the screen perpendicularly to the axis of the switch.

Selon une autre caractéristique, l'écran ainsi positionné est brasé sur l'anneau circulaire au moyen d'un jonc de brasure situé entre les deux pièces.According to another characteristic, the screen thus positioned is brazed to the circular ring by means of a solder rod located between the two parts.

La présente invention a encore pour objet un interrupteur comportant les caractéristiques précédemment mentionnées prises seules ou en combinaison.The present invention also relates to a switch comprising the previously mentioned features taken alone or in combination.

Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels :

  • La figure 1 est une vue en coupe longitudinale d'un interrupteur à vide comprenant un dispositif de fixation d'écran selon l'invention,
  • La figure 2 est une vue de détail agrandie de la figure 1,
  • La figure 3 est une autre vue de détail agrandie de la figure 1, illustrant une autre mise en oeuvre du dispositif de fixation de l'écran dans l'interrupteur à vide, et
  • La figure 4 est une vue éclatée représentant l'écran, un anneau circulaire et un joint selon l'invention.
But other advantages and features of the invention will become more apparent in the detailed description which follows and refers to the accompanying drawings given solely by way of example and in which:
  • FIG. 1 is a longitudinal sectional view of a vacuum interrupter comprising a screen fixing device according to the invention,
  • FIG. 2 is an enlarged detail view of FIG. 1,
  • FIG. 3 is another enlarged detail view of FIG. 1, illustrating another implementation of the device for fixing the screen in the vacuum interrupter, and
  • Figure 4 is an exploded view showing the screen, a circular ring and a seal according to the invention.

Sur la figure 1, on voit une ampoule à vide 1 destinée à être intégrée dans un disjoncteur ou un interrupteur électrique moyenne tension afin de réaliser la coupure d'un circuit électrique en cas de défaut ou lors d'une commande d'ouverture volontaire du circuit électrique.FIG. 1 shows a vacuum interrupter 1 intended to be integrated in a circuit breaker or a medium voltage electrical switch in order to cut off an electrical circuit in the event of a fault or during a voluntary opening command. electrical circuit.

Cette ampoule 1 comprend une enveloppe comportant une partie cylindrique 4,5 fermée par deux fonds 6,7. Cette partie cylindrique est formée par deux isolateurs tubulaires en céramique 4,5 et les deux fonds par deux capots métalliques 6,7. Cette enveloppe renferme deux contacts (non représentés) dont l'un fixe, est solidaire de l'un 7 des capots 6,7 et relié audit capot par une électrode 16, tandis que l'autre, mobile, est monté sur une électrode 17 pouvant se mouvoir dans l'axe de l'ampoule 1 et traversant l'autre capot métallique 6 pour être relié à un mécanisme de commande (non représenté). Le contact mobile est monté coulissant axialement à l'intérieur de l'enveloppe entre une position de fermeture des contacts correspondant à une position de repos du disjoncteur et une position dans laquelle les contacts sont séparés et entraînent la coupure du circuit électrique. L'étanchéité au niveau de la traversée est assurée au moyen d'un soufflet métallique 18 reliant l'électrode mobile 17 au capot 6.This bulb 1 comprises an envelope having a cylindrical portion 4,5 closed by two funds 6.7. This cylindrical part is formed by two tubular ceramic insulators 4,5 and the two funds by two metal covers 6,7. This envelope contains two contacts (not shown), one fixed, is integral with one 7 of the covers 6.7 and connected to said cover by an electrode 16, while the other mobile, is mounted on an electrode 17 able to move in the axis of the bulb 1 and through the other metal cap 6 to be connected to a control mechanism (not shown). The movable contact is mounted to slide axially inside the envelope between a closed position of the contacts corresponding to a rest position of the circuit breaker and a position in which the contacts are separated and lead to the interruption of the electrical circuit. Sealing at the crossing is provided by means of a metal bellows 18 connecting the mobile electrode 17 to the cover 6.

Cet interrupteur comprend également un premier écran métallique 11 ayant pour rôle principal de protéger l'isolateur ou les isolateurs 4,5 de la condensation de vapeurs métalliques issues de la phase d'arc produite entre les contacts pendant la coupure du courant électrique.This switch also comprises a first metal screen 11 whose main role is to protect the insulator or the insulators 4,5 of the condensation of metal vapors from the arc phase produced between the contacts during the power failure.

L'appareil comporte également un second écran 12 situé au niveau de la jonction entre l'un 6 des capots 6,7 et l'un 4 des isolateurs 4,5, et un troisième écran 13 situé au niveau de la jonction entre le second capot 7 et l'autre isolateur 5.The apparatus also comprises a second screen 12 located at the junction between one 6 of the covers 6.7 and one 4 of the insulators 4,5, and a third screen 13 located at the junction between the second cover 7 and the other insulator 5.

Chacun de ces écrans 11,12,13 est supporté par un anneau circulaire 8,9,10 de section transversale en forme de L inversé et comportant une partie 8a s'étendant parallèlement à l'axe de l'ampoule et une partie 8b s'étendant perpendiculairement à cet axe. Pour ce qui concerne le premier écran 11, cette dernière partie 8b de l'anneau 8, est fixée entre les deux isolateurs 4,5 par brasure.Each of these screens 11, 12, 13 is supported by a circular ring 8, 9, 10 of inverted L-shaped cross section and having a portion 8a extending parallel to the axis of the bulb and a portion 8b. extending perpendicular to that axis. Regarding the first screen 11, the latter part 8b of the ring 8, is fixed between the two insulators 4,5 solder.

Pour ce qui concerne le second écran 12, cette partie 8b est fixée entre l'un 6 des capots 6,7 et l'extrémité correspondante 4a de l'isolateur 4. Pour ce qui concerne le troisième écran 13, cette partie 8b est fixée entre l'un 7 des capots 6,7 et l'extrémité correspondante 5a de l'isolateur 5.As regards the second screen 12, this part 8b is fixed between one 6 of the covers 6,7 and the corresponding end 4a of the insulator 4. As regards the third screen 13, this part 8b is fixed between one of the 7 covers 6,7 and the corresponding end 5a of the insulator 5.

Ces écrans protège-isolateurs 11,12,13 comportent sur leur surface extérieure, trois points localisés de repoussage de matière 14 aptes à venir en appui sur l'anneau circulaire 8,9,10 correspondant et assurer ainsi l'arrêt en translation des écrans 11,12,13 à l'intérieur de l'ampoule 1. La forme et les dimensions de l'anneau circulaire 8,9,10 sont telles que les écrans ne peuvent pas se déplacer suivant les autres directions à savoir perpendiculairement à l'axe de l'ampoule. Les écrans ainsi positionnés sont fixés à l'anneau circulaire 8,9,10 par brasage sous vide au moyen d'un jonc de brasure 15 situé entre les deux pièces.These insulators 11,12,13 insulator screens have on their outer surface, three localized points of repoussage 14 material able to bear on the circular ring 8,9,10 corresponding and ensure the translation stop translation 11,12,13 inside the bulb 1. The shape and dimensions of the circular ring 8,9,10 are such that the screens can not move in the other directions ie perpendicular to the axis of the bulb. The screens thus positioned are fixed to the circular ring 8, 9, 10 by vacuum brazing by means of a solder rod 15 located between the two parts.

On a donc réalisé grâce à l'invention, un dispositif de fixation simplifié d'écrans protégeant les isolateurs, sans pièce intermédiaire entre l'écran et l'anneau circulaire fixé entre les isolateurs ou bien l'isolateur et l'un des capots d'une ampoule d'un interrupteur à vide. Le moyen d'arrêt en translation est réalisé sous la forme d'au moins un appui réalisé à moindre coût industriel par un repoussage localisé de matière sur la surface extérieure de l'écran. Celui-ci peut ainsi s'appuyer sur un anneau en cuivre, lequel, par sa mise en forme empêche les autres degrés de liberté de l'écran à l'intérieur de l'ampoule.A simplified fastening device for screens protecting the insulators has thus been achieved thanks to the invention, without any intermediate part between the screen and the circular ring fixed between the insulators or the insulator and one of the protective covers. a bulb of a vacuum interrupter. The translation stopping means is made in the form of at least one support made at a lower industrial cost by a localized repoussage of material on the outer surface of the the screen. It can thus rely on a copper ring, which by shaping prevents other degrees of freedom of the screen inside the bulb.

Le repoussage localisé de la matière se substitue avantageusement à une mise en forme de révolution de l'ensemble de l'écran sur le plan technique, technologique et écologique, pour réaliser la même fonction. En outre, la surface intérieure de l'écran n'est pas affectée par la méthode de repoussage, préservant ainsi les qualités diélectriques en surface de la pièce, ce qui est une condition nécessaire pour garantir les performances électriques d'une ampoule d'un interrupteur à vide.The localized repoussage of the material is advantageously substituted for a shaping revolution of the entire screen on the technical, technological and ecological, to achieve the same function. In addition, the inner surface of the screen is not affected by the embossing method, thus preserving the dielectric qualities on the surface of the workpiece, which is a necessary condition to guarantee the electrical performance of a light bulb. vacuum switch.

En outre, la liaison entre l'écran et l'anneau ne nécessitant pas de pièce intermédiaire, celle-ci est réalisée au même moment que la fermeture de l'ampoule, sans cycle de brasage supplémentaire.In addition, the connection between the screen and the ring does not require an intermediate piece, it is performed at the same time as the closure of the bulb, without additional soldering cycle.

La présente invention peut être utilisée pour la fixation des écrans protège-isolateurs en différents endroits de l'ampoule. Elle permet aussi bien la fixation de l'écran au potentiel flottant entre deux isolateurs que la fixation d'écrans entre l'isolateur et l'un des capots constituant l'enveloppe de l'ampoule.The present invention can be used for fixing the insulators shields in different locations of the bulb. It allows both the fixing of the screen to the floating potential between two insulators that fixing screens between the insulator and one of the covers constituting the envelope of the bulb.

Le nombre de points de repoussage est au minimum de un pour bloquer le mouvement en translation de l'écran. Selon l'ajustement entre l'écran et l'anneau circulaire, il peut être utile d'augmenter le nombre de points de repoussage. Selon l'exemple de réalisation décrit, trois points de repoussage localisés sont réalisés, situés à 120 ° les uns des autres, sur la circonférence de l'écran protège-isolateur.The number of pushback points is at least one to block the translational movement of the screen. Depending on the fit between the screen and the circular ring, it may be useful to increase the number of embossing points. According to the embodiment described, three localized embossing points are made, located 120 ° from each other, on the circumference of the insulator shield.

Claims (8)

  1. Device for fixing a shield (11,12,13) in a switch, said switch comprising an enclosure comprising a cylindrical part closed by two end parts (6,7) forming covers, said enclosure housing two contacts extending axially inside the enclosure at least one of which contacts, called the movable contact, is connected to an operating mechanism and is mounted sliding between a closed position of the contacts and a position wherein the contacts are separated and cause interruption of an electric circuit, said cylindrical part being mechanically connected via the two free ends thereof respectively to the two end covers (6,7) and comprising one or more parts forming cylindrical insulators (4,5) mechanically and axially connected to one another, and at least one protective shield (11,12,13) being supported by a cylindrical ring (8,9,10) fixed between two of the above-mentioned mechanically connected parts of the enclosure, at the level of the mechanical connection between these two parts,
    characterized in that the above-mentioned shield (11,12,13) comprises on the external surface thereof at least one localized material spinning point (14) achieved in such a way as not to modify the internal surface of the shield, said spinning point being arranged in such a way as to form at least one bearing point for the shield (11,12,13) on the ring (8,9,10), so as to ensure that the shield (11,12,13) is stopped in translation in a direction parallel to the axis of the enclosure.
  2. Device according to claim 1, characterized in that the shield (11,12,13) comprises three equidistant localized spinning points (14).
  3. Device according to claim 1 or 2, characterized in that a ring (9,10) is fixed between one (4a,5a) of the free ends of the above-mentioned cylindrical part (4,5) and the cover (6,7) whereto this end (4a,5a) is fixed, said ring supporting a shield (12,13) called the upper or lower shield.
  4. Device according to any one of the claims 1 to 3, characterized in that the cartridge (1) comprising two tubular insulators (4,5) placed end to end, a ring (8) is fixed between the two insulators (4,5) and supports a shield (11) called the central shield, fixed at floating potential between the two insulators (4,5).
  5. Device according to any one of the foregoing claims, characterized in that the above-mentioned ring (8,9,10) presents an L-shaped cross-section.
  6. Device according to claim 5, wherein said ring (8,9,10) is shaped and dimensioned in such a way as to prevent movement of the shield (11,12,13) in a direction perpendicular to the axis of the switch.
  7. Device according to any one of the foregoing claims, characterized in that the shield (11,12,13) thus positioned is welded onto the circular ring (8,9,10) by means of a welding seam (15) situated between the two parts.
  8. Vacuum switch comprising at least one device according to any one of the foregoing claims.
EP05354004A 2004-03-02 2005-01-13 Mounting device for a shield in an electrical interrupter, preferably in a vacuum interrupter Not-in-force EP1571685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402152A FR2867306B1 (en) 2004-03-02 2004-03-02 DEVICE FOR FASTENING A SCREEN IN AN ELECTRICAL SWITCH, IN PARTICULAR A VACUUM SWITCH
FR0402152 2004-03-02

Publications (2)

Publication Number Publication Date
EP1571685A1 EP1571685A1 (en) 2005-09-07
EP1571685B1 true EP1571685B1 (en) 2007-08-15

Family

ID=34746478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05354004A Not-in-force EP1571685B1 (en) 2004-03-02 2005-01-13 Mounting device for a shield in an electrical interrupter, preferably in a vacuum interrupter

Country Status (8)

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US (1) US7205499B2 (en)
EP (1) EP1571685B1 (en)
CN (1) CN1664970B (en)
AT (1) ATE370511T1 (en)
AU (1) AU2005200924B2 (en)
DE (1) DE602005001955T2 (en)
FR (1) FR2867306B1 (en)
TW (1) TWI343069B (en)

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CN103329233B (en) * 2010-10-01 2016-01-27 Abb技术有限公司 The method of the voltage resistance of vacuum interrupter and improvement vacuum interrupter
US8324521B2 (en) * 2010-11-15 2012-12-04 Eaton Corporation Bellows for use in vacuum interrupters
CN102254734B (en) * 2011-06-30 2013-10-16 西安交通大学 High-voltage single-fracture vacuum arc extinguishing chamber
FR3009643B1 (en) 2013-08-09 2015-08-07 Schneider Electric Ind Sas VACUUM BULB, CIRCUIT BREAKER POLE COMPRISING SUCH A VACUUM BULB AND METHODS OF MAKING SUCH DEVICES
US9455104B1 (en) * 2015-04-13 2016-09-27 Eaton Corporation Vacuum interrupter, retaining clip therefor and associated method
CN105070583B (en) * 2015-07-07 2016-05-04 西安交通大学 With the insulation crust of radome functional structure and the vacuum interrupter of application thereof
DE102017222415B4 (en) * 2017-12-11 2021-03-25 Siemens Aktiengesellschaft Screen element for a vacuum interrupter
CN113474865A (en) * 2019-02-06 2021-10-01 株式会社明电舍 Vacuum circuit breaker

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Also Published As

Publication number Publication date
US20050194359A1 (en) 2005-09-08
CN1664970A (en) 2005-09-07
TWI343069B (en) 2011-06-01
DE602005001955T2 (en) 2008-05-15
ATE370511T1 (en) 2007-09-15
DE602005001955D1 (en) 2007-09-27
FR2867306A1 (en) 2005-09-09
AU2005200924A1 (en) 2005-09-22
CN1664970B (en) 2010-04-28
EP1571685A1 (en) 2005-09-07
FR2867306B1 (en) 2006-09-01
AU2005200924B2 (en) 2009-06-04
TW200531107A (en) 2005-09-16
US7205499B2 (en) 2007-04-17

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