EP1004153A1 - Electric connection device with fluid insulator - Google Patents

Electric connection device with fluid insulator

Info

Publication number
EP1004153A1
EP1004153A1 EP98942727A EP98942727A EP1004153A1 EP 1004153 A1 EP1004153 A1 EP 1004153A1 EP 98942727 A EP98942727 A EP 98942727A EP 98942727 A EP98942727 A EP 98942727A EP 1004153 A1 EP1004153 A1 EP 1004153A1
Authority
EP
European Patent Office
Prior art keywords
connection device
enclosure
electrical connection
plug
insulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98942727A
Other languages
German (de)
French (fr)
Other versions
EP1004153B1 (en
Inventor
Pierre Argaut
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sagem SA
Original Assignee
Sagem SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sagem SA filed Critical Sagem SA
Publication of EP1004153A1 publication Critical patent/EP1004153A1/en
Application granted granted Critical
Publication of EP1004153B1 publication Critical patent/EP1004153B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/34—Insulators containing liquid, e.g. oil

Definitions

  • the present invention relates to an electrical connection device with fluid insulator making it possible to connect a high-voltage electrical cable to a post in a metal casing or to an external post
  • An electrical connection device for a post is known from document EP-A-148 394 in a metallic envelope with a fluid insulator such as sulfur hexafluoride in gaseous form
  • the electrical connection device described in this document comprises a conductive connection bar disposed inside the enclosure and having one end fixed in a sealed manner to an insulating resin sleeve sealingly passing through a wall of the enclosure containing the insulating gas
  • the connecting bar extends outside the enclosure and is connected to a plug-in connection member disposed in the part of the sleeve extending outside the enclosure and surrounded by a conductive screen forming a Faraday cage around the plug connection member hable
  • an electrical connection device is the seat of significant electrical stresses when it is used at very high voltage.
  • this device since this device is not provided with any electric field distribution member, it is necessary to provide a member for reducing stresses. separate which is mounted on the electric cable before its installation, which involves delicate manipulations on site to avoid the appearance of electrical stresses at the interface between the internal surface of the insulating sleeve and the Field distribution
  • an electrical connection device with fluid insulator comprising an enclosure containing a fluid insulator, a conductive connecting bar disposed inside the enclosure and having one end fixed in leaktight manner to a sleeve.
  • the connecting rod being connected to a pluggable connection member surrounded by a conductive screen forming a Faraday cage around the connector body spitted ⁇ ble, wherein the pluggable connection member is disposed inside the enclosure and the insulating sleeve is made of elastomeric material and comprises a conductive deflector flush with the internal surface of the insulating sleeve at a distance from the conductive screen surrounding the plug-in connection member.
  • the plug-in connection member is surrounded by the insulating fluid contained in the enclosure, which minimizes the electrical stresses in the material surrounding the plug-in connection member.
  • the device according to the invention can be fully assembled and filled with fluid in the workshop so that when installing an electric cable on a site, it suffices to prepare the end of the cable and engage it in the insulating sleeve to plug in the cable conductor without breaking the sealing of the enclosure, which avoids handling of fluid on the site.
  • this insulating elastomer sleeve is tightly applied to the external surface of the cable due to its elasticity and due to the pressure of the insulating fluid which surrounds it, which minimizes the risk of faults at the interface between the cable. and the insulating sleeve.
  • the deflector integrated into the insulating sleeve then fully plays its role of distributing the electric field inside the insulating sleeve.
  • the deflector extends astride the wall of the enclosure through which the insulating sleeve passes. This minimizes the size of the connecting device according to the invention without affecting the distribution of the electric field.
  • FIG. 1 is an axial sectional view schematic of the electrical connection device according to the inven ⁇ ,
  • FIG. 1 is a partial perspective view ⁇ LEMENT cutaway of another embodiment of the inven ⁇
  • FIG. 2 is a partial perspective view ⁇ LEMENT cutaway of another embodiment of the inven ⁇
  • FIG. 3 is a sectional view along line
  • the electrical connection device is described in relation to a device of the external station type, that is to say that the enclosure is partly formed by an insulator 1, for example an insulator made of epoxy resin reinforced with fiberglass or porcelain and comprising skirts extending outwards.
  • an insulator 1 for example an insulator made of epoxy resin reinforced with fiberglass or porcelain and comprising skirts extending outwards.
  • the insulator 1 is fixed in a manner known per se on a support 7 by bolts 8 and is closed by a metal plate 9 fixed by screws 10 cooperating with inserts 11 embedded in the wall of the enclosure.
  • the seal between the plate 9 and the side wall of the insulator is preferably provided by an O-ring not shown.
  • a metal connecting bar 3 extends inside the enclosure and is fixed in a sealed manner thereto.
  • the conductive connecting bar 3 comprises a collar 4 fixed by screws to a metal insert 5 embedded in the wall of the insulator.
  • a metal insert 5 embedded in the wall of the insulator.
  • an unshown O-ring is arranged between the flange 4 and the metal insert 5.
  • the connecting rod 3 carries a connecting member 6 plugin shown schematically in the form of a lyre.
  • the wall 9 of the enclosure is crossed by a sleeve made of elastomeric material 12, for example a sleeve made of silicone or EPDM, the lower end of which is sealed in an opening 13 in the plate 9.
  • the sleeve of elastomer 12 is mounted in a manner sealed on the end NCI ⁇ higher of the connecting bar 3, for example by a press fit of the connecting bar 3 in the central duct 14 of elastomeric sleeve 12.
  • the enclosure is filled with a fluid insulator 2 such as a gas, in particular sulfur hexafluoride, an oil or even a fat.
  • a fluid insulator 2 such as a gas, in particular sulfur hexafluoride, an oil or even a fat.
  • the elastomer sleeve 12 Opposite the connection member 6, the elastomer sleeve 12 includes a conductive screen 15 which surrounds the connection member.
  • the conductive screen 15 is for example made of elastomer made conductive by carbon black.
  • the elastomer sleeve 12 At its lower part the elastomer sleeve 12 comprises a deflector 16 which straddles the lower wall 9 of the enclosure at a distance from the conductive screen 15, the lower part of the deflector 16 flush with the internal surface of the elastomer sleeve 12 .
  • an electrical cable When an electrical cable is connected, it is first of all prepared in a manner known per se by cutouts in staircases showing in order the conductor of the cable at the end thereof, the insulation of the cable and the cable shield screen.
  • the end of the cable is then introduced into the conduit 14 of the elastomer sleeve 12 until the cable conductor is plugged into the plug-in connection member 6.
  • the end of the cable insulation is then opposite the conductive screen 15 and the internal surface of the duct 14 is pressed against the external surface of the cable insulation while the part of the deflector 16 which is flush with the internal surface of the elastomer sleeve 12 is in contact with the cable screen.
  • the sleeve 12 is preferably force-fitted or the sleeve 12 is maintained in a slightly expanded state by a removable tube engaged in the workshop in the conduit 14 and removed after the cable has been put in place.
  • Figures 2 and 3 illustrate another embodiment of the invention more particularly intended for a station in a metal envelope but can also be used in an outdoor station of the type illustrated in Figure 1.
  • the enclosure containing the insulating fluid is delimited by the walls or by internal partitions of the station.
  • an insulating sleeve 12 is fixed as previously on a plate 9 forming a part of the wall of the enclosure and mounted for this purpose in a sealed manner on another wall portion 17 by screws 18, the sealing being ensured by a seal 19.
  • the connecting bar 3 is engaged in a sealed manner in the insulating sleeve 12 and comprises at its end internal to the sleeve 12 a plug-in connection member 6.
  • the other end, not shown, of the connecting bar 3 is fixed in a manner known per se to a bus extending inside the station.
  • the device of this embodiment comprises an insulating reinforcement generally designated in 20 which s extends around the insulating sleeve 12.
  • the frame 20 has one end fixed to the plate 9 and an opposite end supporting the connecting bar 3.
  • the frame 20 comprises three insulating branches in flying buttress 21 disposed at 120 ° from one another around the axis of the sleeve 12.
  • One end of each branch 21 is fixed to the plate 9 by a screw 22 engaged in an insert 23 embedded in the resin forming the branch 21.
  • the other end of each branch 21 is fixed to a metal support ring 24 by a screw 25 engaged in an insert 26 embedded in the branch 21.
  • the support ring 24 surrounds the connecting bar 3
  • the conductive screen 15 which extends around the plug-in connection member extends outside the insulating sleeve 12 and extends at least up to the support ring 24.
  • the conductive screen 15 has a rounded edge 27 and is folded over the frame as illustrated in the figures to wrap the support ring 24 and the parts metallic 26 which are associated.
  • the invention is not limited to the embodiments described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims.
  • the device according to the invention can also be adapted to the application for which it is intended.
  • the removal of the insulator 1 makes it possible to considerably reduce the size of the electrical connection device and, consequently, to correspondingly reduce the size of the post in the casing metallic.
  • the plug-in connection member 6 has been illustrated in relation to embodiments in which the plug-in connection member 6 is fixed to the lower end of the connecting bar 3, provision may be made for make a cavity in this connecting bar and fix the plug-in connection member in the bottom of this cavity. The side wall of the cavity then plays the role of the conductive screen 15 which can be reduced. This further minimizes the size of the connecting device according to the invention.
  • the plug-in connection member 6 has been illustrated in the form of a female member, it is also possible to provide a male connection member associated with the connecting rod 3 and to provide a female connection member on the cable.
  • the conductive screen 15 has been shown flush with the internal surface of the insulating sleeve 12, it can also be embedded in the mass of the latter.
  • the frame 20 has been illustrated in the form of three branches joined by a support ring, it is possible to provide a larger number of branches, or to produce a tubular, cylindrical or conical frame, completely enveloping the elastomer sleeve 12 and the internal face of which can be in contact with the elastomeric sleeve 12. In the latter case the reinforcement can even be used as a mold for the elastomeric sleeve 12.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Insulators (AREA)

Abstract

The invention concerns an electric connection device comprising a chamber (1, 9) containing a fluid insulator (2), a conductive tie busbar (1) arranged inside the chamber and having one end sealingly fixed to an insulating elastomer sleeve (12) passing sealingly through a wall of the chamber, the tie busbar (3) being connected inside the chamber to a plug-in connecting element (6) enclosed within a conductor shield (15), the elastomer sleeve (12) further comprising a conductor deflector plate (16) flush with the insulating sleeve inner surface at a distance from the conductor shield (15).

Description

Dispositif de liaison électrique à isolant fluide. Electrical connection device with fluid insulator.
La présente invention concerne un dispositif de liaison électrique à isolant fluide permettant de relier un câble électrique à haute tension à un poste sous enveloppe métallique ou à un poste extérieur On connaît du document EP-A-148 394 un dispositif de liaison électrique pour un poste sous enveloppe métalli que à isolant fluide tel que de l'hexafluorure de soufre sous forme gazeuse Le dispositif de liaison électrique décrit dans ce document comporte un barre de liaison conductrice disposée à l'intérieur de l'enceinte et ayant une extrémité fixée de façon étanche à un manchon en résine isolante traversant de façon étanche une paroi de l'enceinte contenant le gaz isolant La barre de liaison s'étend à l'extérieur de l'enceinte et est reliée a un organe de connexion embrochable disposé dans la partie du manchon s 'étendant à l'extérieur de l'enceinte et entouré par un écran conducteur formant une cage de Faraday autour de l'organe de connexion embrochableThe present invention relates to an electrical connection device with fluid insulator making it possible to connect a high-voltage electrical cable to a post in a metal casing or to an external post An electrical connection device for a post is known from document EP-A-148 394 in a metallic envelope with a fluid insulator such as sulfur hexafluoride in gaseous form The electrical connection device described in this document comprises a conductive connection bar disposed inside the enclosure and having one end fixed in a sealed manner to an insulating resin sleeve sealingly passing through a wall of the enclosure containing the insulating gas The connecting bar extends outside the enclosure and is connected to a plug-in connection member disposed in the part of the sleeve extending outside the enclosure and surrounded by a conductive screen forming a Faraday cage around the plug connection member hable
Un tel dispositif de liaison électrique est le siège de contraintes électriques importantes lorsqu'il est utilisé a tension très élevée En outre ce dispositif n'étant pourvu d'aucun organe de répartition de champ électrique il est nécessaire de prévoir un organe de réduction de contraintes séparé qui est monté sur le câble électrique avant mise en place de celui-ci, ce qui implique des manipulations délicates sur le chantier pour éviter l'apparition de contraintes électriques à l'interface entre la surface interne du manchon isolant et l'organe de répartition de champ Selon l'invention on propose un dispositif de liaison électrique à isolant fluide comportant une enceinte contenant un isolant fluide, une barre de liaison conductrice disposée à l'intérieur de l'enceinte et ayant une extrémité fixée de façon étanche à un manchon isolant traversant de façon étanche une paroi de l'enceinte, la barre de liaison étant reliée à un organe de connexion embrochable entouré par un écran conducteur formant une cage de Faraday autour de l'organe de connexion embrocha¬ ble, dans lequel l'organe de connexion embrochable est disposé à l'intérieur de l'enceinte et le manchon isolant est en matière élastomère et comporte un déflecteur conducteur affleurant la surface interne du manchon isolant à distance de l'écran conducteur entourant l'organe de connexion embrochable. Ainsi l'organe de connexion embrochable est entouré par le fluide isolant contenu dans l'enceinte ce qui minimise les contraintes électriques dans la matière entourant l'organe de connexion embrochable. En outre le dispositif selon l'invention peut être entièrement monté et rempli de fluide en atelier de sorte que lors de la mise en place d'un câble électrique sur un chantier il suffit de préparer l'extrémité du câble et engager celle-ci dans le manchon isolant pour embrocher le conducteur du câble sans rompre l'étanchéité de l'enceinte, ce qui permet d'éviter des manipulations de fluide sur le chantier.Such an electrical connection device is the seat of significant electrical stresses when it is used at very high voltage. In addition, since this device is not provided with any electric field distribution member, it is necessary to provide a member for reducing stresses. separate which is mounted on the electric cable before its installation, which involves delicate manipulations on site to avoid the appearance of electrical stresses at the interface between the internal surface of the insulating sleeve and the Field distribution According to the invention there is provided an electrical connection device with fluid insulator comprising an enclosure containing a fluid insulator, a conductive connecting bar disposed inside the enclosure and having one end fixed in leaktight manner to a sleeve. insulator sealingly passing through a wall of the enclosure, the connecting rod being connected to a pluggable connection member surrounded by a conductive screen forming a Faraday cage around the connector body spitted ¬ ble, wherein the pluggable connection member is disposed inside the enclosure and the insulating sleeve is made of elastomeric material and comprises a conductive deflector flush with the internal surface of the insulating sleeve at a distance from the conductive screen surrounding the plug-in connection member. Thus the plug-in connection member is surrounded by the insulating fluid contained in the enclosure, which minimizes the electrical stresses in the material surrounding the plug-in connection member. In addition, the device according to the invention can be fully assembled and filled with fluid in the workshop so that when installing an electric cable on a site, it suffices to prepare the end of the cable and engage it in the insulating sleeve to plug in the cable conductor without breaking the sealing of the enclosure, which avoids handling of fluid on the site.
En outre ce manchon isolant en élastomère se trouve étroitement appliqué sur la surface externe du câble du fait de son élasticité et du fait de la pression du fluide isolant qui l'entoure, ce qui minimise le risque de défauts à l'interface entre le câble et le manchon isolant. Le déflecteur intégré au manchon isolant joue alors pleinement son rôle de répartition du champ électrique à l'intérieur de manchon isolant.In addition, this insulating elastomer sleeve is tightly applied to the external surface of the cable due to its elasticity and due to the pressure of the insulating fluid which surrounds it, which minimizes the risk of faults at the interface between the cable. and the insulating sleeve. The deflector integrated into the insulating sleeve then fully plays its role of distributing the electric field inside the insulating sleeve.
Selon une version avantageuse de l'invention le déflecteur s'étend à cheval sur la paroi de l'enceinte traversée par le manchon isolant. On minimise ainsi l'encombrement du dispositif de liaison selon l'invention sans nuire à la répartition du champ électrique.According to an advantageous version of the invention, the deflector extends astride the wall of the enclosure through which the insulating sleeve passes. This minimizes the size of the connecting device according to the invention without affecting the distribution of the electric field.
D'autres- caractéristiques et avantages de l'in- vention apparaîtront à la lecture de la description qui suit de deux modes de réalisation particuliers non limita¬ tifs de l'invention en référence aux figures ci- jointes parmi lesquelles :Other characteristics and advantages of the invention will appear on reading the description which is two particular embodiments not limita tive ¬ of the invention with reference to the accompanying figures in which:
- la figure 1 est une vue en coupe axiale schéma- tique du dispositif de liaison électrique selon l'inven¬ tion,- Figure 1 is an axial sectional view schematic of the electrical connection device according to the inven ¬,
- la figure 2 est une vue en perspective partiel¬ lement écorchée d'un autre mode de réalisation de l'inven¬ tion, - la figure 3 est une vue en coupe selon la ligne- Figure 2 is a partial perspective view ¬ LEMENT cutaway of another embodiment of the inven ¬, - Figure 3 is a sectional view along line
III-III de la figure 2.III-III of figure 2.
En référence à la figure 1, le dispositif de liaison électrique selon l'invention est décrit en relation avec un dispositif de type poste extérieur c'est à dire que l'enceinte est constituée en partie par un isolateur 1, par exemple un isolateur en résine époxy renforcée de fibre de verre ou en porcelaine et comportant des jupes s 'étendant en saillie vers l'extérieur. A sa partie inférieure l'isolateur 1 est fixé de façon connue en soi sur un support 7 par des boulons 8 et est fermé par une plaque métallique 9 fixée par des vis 10 coopérant avec des inserts 11 noyés dans la paroi de l'enceinte. L'étanchéité entre la plaque 9 et la paroi latérale de l'isolateur est de préférence assurée par un joint torique non représenté. Une barre de liaison métallique 3 s'étend à l'intérieur de l'enceinte et est fixée de façon étanche à celle-ci. A cet effet la barre de liaison conductrice 3 comporte un collerette 4 fixée par des vis à un insert métallique 5 noyé dans la paroi de l'isolateur. De préfé- rence un joint torique non représenté est disposé entre la collerette 4 et l' insert métallique 5. A son' extrémité inférieur la barre de liaison 3 porte un organe de connexion embrochable 6 représenté de façon schématique sous forme d'une lyre. La paroi 9 de l'enceinte est traversée par un manchon en matière élastomère 12, par exemple un manchon en silicone ou en EPDM, dont l'extrémité inférieure est encastrée de façon étanche dans une ouverture 13 de la plaque 9. A son extrémité supérieure le manchon en élasto- mère 12 est monté de façon étanche sur l'extrémité infé¬ rieure de la barre de liaison 3, par exemple par un emmanchement à force de la barre de liaison 3 dans le conduit central 14 du manchon en élastomère 12.With reference to FIG. 1, the electrical connection device according to the invention is described in relation to a device of the external station type, that is to say that the enclosure is partly formed by an insulator 1, for example an insulator made of epoxy resin reinforced with fiberglass or porcelain and comprising skirts extending outwards. At its lower part the insulator 1 is fixed in a manner known per se on a support 7 by bolts 8 and is closed by a metal plate 9 fixed by screws 10 cooperating with inserts 11 embedded in the wall of the enclosure. The seal between the plate 9 and the side wall of the insulator is preferably provided by an O-ring not shown. A metal connecting bar 3 extends inside the enclosure and is fixed in a sealed manner thereto. To this end, the conductive connecting bar 3 comprises a collar 4 fixed by screws to a metal insert 5 embedded in the wall of the insulator. Prefer- ence an unshown O-ring is arranged between the flange 4 and the metal insert 5. At its lower end the connecting rod 3 carries a connecting member 6 plugin shown schematically in the form of a lyre. The wall 9 of the enclosure is crossed by a sleeve made of elastomeric material 12, for example a sleeve made of silicone or EPDM, the lower end of which is sealed in an opening 13 in the plate 9. At its upper end, the sleeve of elastomer 12 is mounted in a manner sealed on the end NCI ¬ higher of the connecting bar 3, for example by a press fit of the connecting bar 3 in the central duct 14 of elastomeric sleeve 12.
L'enceinte est remplie d'un isolant fluide 2 tel qu'un gaz, en particulier de l'hexafluorure de soufre, une huile ou même une graisse.The enclosure is filled with a fluid insulator 2 such as a gas, in particular sulfur hexafluoride, an oil or even a fat.
En regard de l'organe de connexion 6 le manchon en élastomère 12 comporte un écran conducteur 15 qui entoure l'organe de connexion. L'écran conducteur 15 est par exemple réalisé en élastomère rendu conducteur par du noir de carbone. A sa partie inférieure le manchon élastomère 12 comporte un déflecteur 16 qui s'étend à cheval sur la paroi inférieure 9 de l'enceinte à distance de l'écran conducteur 15, la partie inférieure du déflecteur 16 affleurant la surface interne du manchon élastomère 12.Opposite the connection member 6, the elastomer sleeve 12 includes a conductive screen 15 which surrounds the connection member. The conductive screen 15 is for example made of elastomer made conductive by carbon black. At its lower part the elastomer sleeve 12 comprises a deflector 16 which straddles the lower wall 9 of the enclosure at a distance from the conductive screen 15, the lower part of the deflector 16 flush with the internal surface of the elastomer sleeve 12 .
Lors du raccordement d'un câble électrique celui-ci est tout d'abord préparé de façon connue en soi par des découpages en escalier faisant apparaître dans l'ordre le conducteur du câble à l'extrémité de celui-ci, l'isolant du câble et l'écran de blindage du câble. L'extrémité du câble est alors introduite dans le conduit 14 du manchon élastomère 12 jusqu'à ce que le conducteur du câble soit embroché dans l'organe de connexion embrochable 6. L'extrémité de l'isolant du câble est alors en regard de l'écran conducteur 15 et la surface interne du conduit 14 est plaquée sur la surface externe de l'isolant du câble tandis que la partie du déflecteur 16 qui affleure la surface interne du manchon élastomère 12 est en contact avec l'écran du câble. Pour assurer un contact intime entre la surface interne du manchon élastomère 12 et les diffé- rents composants du câble, celui-ci est de préférence emmanché à force ou bien le manchon 12 est maintenu dans un état légèrement expansé par un tube amovible engagé en atelier dans le conduit 14 et retiré après mise en place du câble.When an electrical cable is connected, it is first of all prepared in a manner known per se by cutouts in staircases showing in order the conductor of the cable at the end thereof, the insulation of the cable and the cable shield screen. The end of the cable is then introduced into the conduit 14 of the elastomer sleeve 12 until the cable conductor is plugged into the plug-in connection member 6. The end of the cable insulation is then opposite the conductive screen 15 and the internal surface of the duct 14 is pressed against the external surface of the cable insulation while the part of the deflector 16 which is flush with the internal surface of the elastomer sleeve 12 is in contact with the cable screen. To ensure intimate contact between the internal surface of the elastomeric sleeve 12 and the different rents components of the cable, it is preferably force-fitted or the sleeve 12 is maintained in a slightly expanded state by a removable tube engaged in the workshop in the conduit 14 and removed after the cable has been put in place.
Les figures 2 et 3 illustrent un autre mode de réalisation de l'invention plus particulièrement destiné à un poste sous enveloppe métallique mais pouvant également être utilisé dans un poste extérieur du type illustré à la figure 1. Dans l'exemple illustré l'enceinte contenant le fluide isolant est délimitée par les parois ou par des cloisonnements internes du poste. Dans ce mode de réalisation pour lequel des références numériques identiques sont utilisés pour désigner les parties semblables à celles du premier mode de réalisation, un manchon isolant 12 est fixé comme précédemment sur une plaque 9 formant une partie de la paroi de l'enceinte et montée à cet effet de façon étanche sur une autre partie de paroi 17 par des vis 18, l'étanchéité étant assurée par un joint 19. Comme dans le mode de réalisation précédent la barre de liaison 3 est engagée de façon étanche dans le manchon isolant 12 et comporte à son extrémité interne au manchon 12 un organe de connexion embrochable 6. L'autre extrémité non représentée de la barre de liaison 3 est fixée de façon connue en soi à un bus s 'étendant à l'intérieur du poste.Figures 2 and 3 illustrate another embodiment of the invention more particularly intended for a station in a metal envelope but can also be used in an outdoor station of the type illustrated in Figure 1. In the example illustrated the enclosure containing the insulating fluid is delimited by the walls or by internal partitions of the station. In this embodiment for which identical reference numerals are used to designate the parts similar to those of the first embodiment, an insulating sleeve 12 is fixed as previously on a plate 9 forming a part of the wall of the enclosure and mounted for this purpose in a sealed manner on another wall portion 17 by screws 18, the sealing being ensured by a seal 19. As in the previous embodiment, the connecting bar 3 is engaged in a sealed manner in the insulating sleeve 12 and comprises at its end internal to the sleeve 12 a plug-in connection member 6. The other end, not shown, of the connecting bar 3 is fixed in a manner known per se to a bus extending inside the station.
Afin de supporter les efforts mécaniques longitudinaux ou latéraux appliqués en particulier lors de la mise en place d'un câble électrique ou en cas de court circuit sur la ligne, le dispositif de ce mode de réalisation comporte une armature isolante généralement désignée en 20 qui s'étend autour du manchon isolant 12. l'armature 20 a une extrémité fixée à la plaque 9 et une extrémité opposée supportant la barre de liaison 3. Selon le mode de réalisation illustré l'armature 20 comporte trois branches isolantes en arc-boutant 21 disposées à 120° les unes des autres autour de l'axe du manchon 12. Une des extrémités de chaque branche 21 est fixée à la plaque 9 par une vis 22 engagée dans un insert 23 noyé dans la résine formant la branche 21. L'autre extrémité de chaque branche 21 est fixée à un anneau support métallique 24 par une vis 25 engagée dans un insert 26 noyé dans la branche 21. L'anneau support 24 entoure la barre de liaison 3. Pour éviter que l'anneau métallique 24 soit générateur de contraintes électriques lorsque la tige de liaison 3 est sous tension, l'écran conducteur 15 qui s'étend autour de l'organe de connexion embrochable se prolonge à l'extérieur du manchon isolant 12 et s'étend au moins jusqu'à l'anneau support 24. De préférence l'écran conducteur 15 a un bord 27 arrondi et est replié sur l'armature comme illustré sur les figures pour envelopper l'anneau support 24 et les pièces métalliques 26 qui lui sont associées. Bien entendu l'invention n'est pas limitée aux modes de réalisation décrits et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications . Le dispositif selon l'invention peut également être adapté à l'applica- tion à laquelle il est destiné.In order to withstand the longitudinal or lateral mechanical forces applied in particular when installing an electric cable or in the event of a short circuit on the line, the device of this embodiment comprises an insulating reinforcement generally designated in 20 which s extends around the insulating sleeve 12. the frame 20 has one end fixed to the plate 9 and an opposite end supporting the connecting bar 3. According to the embodiment illustrated the frame 20 comprises three insulating branches in flying buttress 21 disposed at 120 ° from one another around the axis of the sleeve 12. One end of each branch 21 is fixed to the plate 9 by a screw 22 engaged in an insert 23 embedded in the resin forming the branch 21. The other end of each branch 21 is fixed to a metal support ring 24 by a screw 25 engaged in an insert 26 embedded in the branch 21. The support ring 24 surrounds the connecting bar 3 To prevent the metal ring 24 from generating electrical stresses when the connecting rod 3 is energized, the conductive screen 15 which extends around the plug-in connection member extends outside the insulating sleeve 12 and extends at least up to the support ring 24. Preferably the conductive screen 15 has a rounded edge 27 and is folded over the frame as illustrated in the figures to wrap the support ring 24 and the parts metallic 26 which are associated. Of course, the invention is not limited to the embodiments described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims. The device according to the invention can also be adapted to the application for which it is intended.
En particulier dans le cas du montage sur un poste sous enveloppe métallique, la suppression de l'isolateur 1 permet de réduire considérablement l'encombrement du dispositif de liaison électrique et par voie de conséquence de diminuer de façon correspondante l'encombrement du poste sous enveloppe métallique.In particular in the case of mounting on a post in a metal casing, the removal of the insulator 1 makes it possible to considerably reduce the size of the electrical connection device and, consequently, to correspondingly reduce the size of the post in the casing metallic.
Bien que l'invention ait été illustrée en relation avec des modes de réalisation dans lesquels l'organe de connexion embrochable 6 est fixé à l'extrémité infé- rieure de la barre de liaison 3, on peut prévoir de réaliser une cavité dans cette barre de liaison et de fixer l'organe de connexion embrochable dans le fond de cette cavité. La paroi latérale de la cavité joue alors le rôle de l'écran conducteur 15 qui peut être réduit. Ceci permet de minimiser encore l'encombrement du dispositif de liaison selon l'invention. Bien que l'organe de connexion embrochable 6 ait été illustré sous forme d'un organe femelle, on peut également prévoir un organe de connexion mâle associé à la tige de liaison 3 et prévoir un organe de connexion femelle sur le câble.Although the invention has been illustrated in relation to embodiments in which the plug-in connection member 6 is fixed to the lower end of the connecting bar 3, provision may be made for make a cavity in this connecting bar and fix the plug-in connection member in the bottom of this cavity. The side wall of the cavity then plays the role of the conductive screen 15 which can be reduced. This further minimizes the size of the connecting device according to the invention. Although the plug-in connection member 6 has been illustrated in the form of a female member, it is also possible to provide a male connection member associated with the connecting rod 3 and to provide a female connection member on the cable.
On peut également prévoir à l'intérieur du manchon 12 une couche de matériau à haute permittivité s 'étendant entre le déflecteur 16 et l'écran conducteur 15 afin d'assurer une répartition homogène du champ électri- que .It is also possible to provide inside the sleeve 12 a layer of high permittivity material extending between the deflector 16 and the conductive screen 15 in order to ensure a homogeneous distribution of the electric field.
Bien que l'écran conducteur 15 ait été représenté affleurant la surface interne du manchon isolant 12, il peut également être noyé dans la masse de celui-ci.Although the conductive screen 15 has been shown flush with the internal surface of the insulating sleeve 12, it can also be embedded in the mass of the latter.
Bien que l'armature 20 ait été illustrée sous forme de trois branches réunies par un anneau support on peut prévoir un plus grand nombre de branches, ou réaliser une armature tubulaire, cylindrique ou conique, enveloppant totalement le manchon élastomère 12 et dont la face interne peut être en contact avec le manchon élastomère 12. Dans ce dernier cas l'armature peut même être utilisée comme moule pour le manchon élastomère 12. Although the frame 20 has been illustrated in the form of three branches joined by a support ring, it is possible to provide a larger number of branches, or to produce a tubular, cylindrical or conical frame, completely enveloping the elastomer sleeve 12 and the internal face of which can be in contact with the elastomeric sleeve 12. In the latter case the reinforcement can even be used as a mold for the elastomeric sleeve 12.

Claims

REVENDICATIONS 1. Dispositif de liaison électrique à isolant fluide comportant une enceinte (1, 9 ; 17, 9), contenant un isolant fluide (2) , une barre de liaison conductrice (3) disposée à l'intérieur de l'enceinte et ayant une extrémité fixée de façon étanche à un manchon isolant (12) traversant de façon étanche une paroi (9) de l'enceinte, la barre de liaison (3) étant reliée à un organe de connexion embrochable (6) entouré par un écran conducteur (15) formant un cage de Faraday autour de l'organe de connexion embrochable, caractérisé en ce que l'organe de connexion embrochable (6) est disposé à l'intérieur de l'enceinte (1) et en ce que le manchon isolant (12) est en matière élastomère et comporte un déflecteur conducteur (16) affleurant la surface interne du manchon isolant à distance de l'écran conducteur (15) entourant l'organe de connexion embrochable.CLAIMS 1. Fluid insulator electrical connection device comprising an enclosure (1, 9; 17, 9), containing a fluid insulator (2), a conductive connecting bar (3) disposed inside the enclosure and having one end tightly fixed to an insulating sleeve (12) sealingly passing through a wall (9) of the enclosure, the connecting bar (3) being connected to a plug-in connection member (6) surrounded by a conductive screen (15) forming a Faraday cage around the plug-in connection member, characterized in that the plug-in connection member (6) is disposed inside the enclosure (1) and in that the insulating sleeve (12) is made of elastomeric material and comprises a conductive deflector (16) flush with the internal surface of the insulating sleeve at a distance from the conductive screen (15) surrounding the plug-in connection member.
2. Dispositif de liaison électrique selon la revendication 1 caractérisé en ce que le déflecteur (16) s'étend à cheval sur la paroi (9) de l'enceinte traversée par le manchon isolant (12) .2. An electrical connection device according to claim 1 characterized in that the deflector (16) extends astride the wall (9) of the enclosure through which the insulating sleeve (12) passes.
3. Dispositif de liaison électrique selon la revendication 1, caractérisé en ce qu'il comporte une armature isolante (20) s 'étendant autour du manchon isolant (12) et ayant une extrémité fixée à la paroi (9) de l'enceinte et une extrémité opposée supportant la barre de liaison (3) .3. An electrical connection device according to claim 1, characterized in that it comprises an insulating reinforcement (20) extending around the insulating sleeve (12) and having one end fixed to the wall (9) of the enclosure and an opposite end supporting the link bar (3).
4. Dispositif de liaison électrique selon la revendication 3, caractérisé en ce que l'armature (20) comporte une série de bras isolants (21) reliés entre eux par un anneau support (24) entourant la barre de liaison (3) .4. An electrical connection device according to claim 3, characterized in that the frame (20) comprises a series of insulating arms (21) connected together by a support ring (24) surrounding the connection bar (3).
5. Dispositif de liaison électrique selon la revendication 4, -caractérisé en ce que l'anneau support (24) est métallique et en ce que l'écran conducteur (15) s'étend au moins jusqu'à l'anneau support.5. An electrical connection device according to claim 4, -characterized in that the support ring (24) is metallic and in that the conductive screen (15) extends at least to the support ring.
6. Dispositif de liaison électrique selon la revendication 5, caractérisé en ce que l'écran conducteur6. Electrical connection device according to claim 5, characterized in that the conductive screen
(15) est replié sur l'armature (20) pour envelopper l'anneau support (24) et des pièces métalliques (26) qui lui sont associées .(15) is folded over the frame (20) to wrap the support ring (24) and metal parts (26) associated therewith.
7. Dispositif de liaison électrique selon la revendication 6, caractérisé en ce que l'écran conducteur (15) a un bord (27) arrondi. 7. An electrical connection device according to claim 6, characterized in that the conductive screen (15) has a rounded edge (27).
8. Dispositif de liaison électrique selon la revendication 3, caractérisé en ce que l'armature est tubulaire . 8. An electrical connection device according to claim 3, characterized in that the frame is tubular.
EP98942727A 1997-08-13 1998-08-11 Electric connection device with fluid insulator Expired - Lifetime EP1004153B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9710336A FR2767421B1 (en) 1997-08-13 1997-08-13 ELECTRICAL LINK DEVICE WITH FLUID INSULATION
FR9710336 1997-08-13
PCT/FR1998/001792 WO1999009614A1 (en) 1997-08-13 1998-08-11 Electric connection device with fluid insulator

Publications (2)

Publication Number Publication Date
EP1004153A1 true EP1004153A1 (en) 2000-05-31
EP1004153B1 EP1004153B1 (en) 2001-11-07

Family

ID=9510277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98942727A Expired - Lifetime EP1004153B1 (en) 1997-08-13 1998-08-11 Electric connection device with fluid insulator

Country Status (5)

Country Link
US (1) US6309235B1 (en)
EP (1) EP1004153B1 (en)
DE (1) DE69802414T2 (en)
FR (1) FR2767421B1 (en)
WO (1) WO1999009614A1 (en)

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Also Published As

Publication number Publication date
EP1004153B1 (en) 2001-11-07
WO1999009614A1 (en) 1999-02-25
US6309235B1 (en) 2001-10-30
DE69802414D1 (en) 2001-12-13
DE69802414T2 (en) 2002-07-18
FR2767421A1 (en) 1999-02-19
FR2767421B1 (en) 1999-09-17

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