EP1014389B1 - Hermetically sealed feedthrough bushing for external electrical apparatus - Google Patents

Hermetically sealed feedthrough bushing for external electrical apparatus Download PDF

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Publication number
EP1014389B1
EP1014389B1 EP99403125A EP99403125A EP1014389B1 EP 1014389 B1 EP1014389 B1 EP 1014389B1 EP 99403125 A EP99403125 A EP 99403125A EP 99403125 A EP99403125 A EP 99403125A EP 1014389 B1 EP1014389 B1 EP 1014389B1
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EP
European Patent Office
Prior art keywords
piece
diameter
link
screen
current
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EP99403125A
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German (de)
French (fr)
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EP1014389A1 (en
Inventor
Thierry Starck
Kenneth Johnson
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Alstom SA
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Alstom SA
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    • 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
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/301—Sealing of insulators to support
    • 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
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/265—Fastening of insulators to support

Definitions

  • the bridle is fixed to the wall by bolting and in a way not shown here, it has an annular groove 6 for a seal 6 for obtaining a fitting of the bushing on the wall which is hermetically sealed.
  • This kind of drawbacks have the disadvantage of using a relatively fragile material, involve the use of a gasket which is difficult to assemble and a field control screen whose positioning is critical. Plus the shape outside of the crossing in the constraint zone, conical in shape, included between the flange and the fins 7, does not allow the mounting of transformers current torics.
  • Such a crossing comprises a molded resin core 9 around a central conductor 8 and a fixing flange 10 molded with the core.
  • the surface external of the flange and a cylindrical part 9A of the core which follows it is covered with a conductive coating 11 intended to be earthed, when the crossing is in place.
  • the metallized cylindrical part 9A allows mounting at least one toroidal current transformer 12 positioned in the vicinity of the clamp.
  • An electric field distribution cone 13 is threaded on the core following the current transformer (s) and before a series fins 14 made of elastomeric material which are stacked on the core one after the other the other.
  • This cone is functionally equivalent to the stress zone, conical, included by the crossing shown in Figure 1 and it allows to control the field at the end of the metallization which covers the cylindrical part 9A and a part of himself which follows this part when the crossing is Assembly.
  • the desired electrical creepage distance is obtained through the stack of fins 14 as known to those skilled in the art.
  • This second type of crossing is fixed on the wall 15 of a metal casing of an appliance of the same way that the first type mentioned above and it involves the establishment of the same type of seal, so it has the same disadvantages topic. It also has the disadvantage of implementing a relatively large number important of different parts whose realization and assembly imply a succession of operations and in particular manual operations. Finally, a disassembly of the fins and the electric field distribution cone is necessary, if a toroidal transformer replacement is to be carried out, by example following a failure.
  • the invention therefore provides a hermetically sealed current crossing for gas-insulated outdoor electrical appliance, more particularly intended for ensure the connection of a bare conductor to a device, housed in a the metal casing, one wall of which has an opening provided for allow connection of a conductive element of the device at one end a conductive element axially housed in the bushing.
  • the current crossing is intended to come up at an opening 16 provided for it in a metal wall 17 of the casing of a device, of the armored type, housed in a enclosure kept hermetically sealed filled with an insulating gas electric or possibly under vacuum.
  • This crossing has an element axial conductor 18, intended to be connected to a conductive element 19, the device in the envelope.
  • this conductive element 19 projects out of the envelope of the device, at through the opening 16 of this envelope and it is connected end to end with the conductive element 18 which is screwed onto a threaded rod 21 carried by the conductive element 19.
  • a connecting piece and screen 20 allows the fixing of the crossing on a envelope, it is cylindrical in appearance and of the weldable metal flange type. In the example presented, this part is centered on the conductive element 18 which there partially penetrates through its end for fixing to the conductive element 19.
  • This connection and screen part 20 is for example made of stainless steel, it comprises a part 20A consisting of a cylinder of revolution, the diameter corresponds to that of the opening 16 of the wall 17 of the envelope at level where it is fixed tightly, seamlessly and by welding.
  • This connecting piece and screen is therefore at the same potential as the rest of the envelope of the appliance which is usually earthed.
  • the length of part 20A is chosen to allow it to receive one or more transformers externally toric current 22, of appropriate diameter, which comes (s) around the belt.
  • Level required sealing can be obtained by adhesion of the elastomer on the inserts which constitute the conductive element 18 and the parts of connection piece and screen 20B, 20C, 20D, after depositing an adhesion primer on these inserts, or again by direct molding of the body on the conductive element 18 and on the part 20. It is also envisaged to produce the crossing body 23 in a material of the kind resin having qualities corresponding to those which are envisaged above. The part of the connecting piece and screen 20 intended to be covered by the resin of the bushing body 23 is then previously covered by a layer sealing in elastomeric material on which the resin intended for constitute the crossing body.
  • the molding of the bushing body 23 which is carried out at once, ensures simultaneously the production of a part grouping a core 23A, in which is longitudinally housed the central conductive element 18, a distribution cone of electric field 23B, including the connecting piece and screen parts 20B, 20C, 20D, as well as a succession of fins 23C.
  • the overall diameter of the bushing is kept low, although sufficient to ensure a reduced electric field in the air at the cone of electric field distribution, due to the shrinkage that the holding allows dielectric of the layer of insulating material present between the flange 20 and the conductive element 18. It is intended to be at most equal to that provided for the part of connection piece and screen 20A, the widest part of piece 20, in order to allow the installation and removal of one or more transformers current 22 without further displacement of current crossing element.
  • the reduced diameter cylindrical part 20C of the flange 20, which is concentric with the conductive element 18 extends over a length chosen in a known manner from the skilled person, so that the crossing has rigidity and resistance to bending allowing it to resist the bending forces that may be applied to it at its outer end.
  • the flaring made up of part 20D reduces the field concentration at this end level.

Abstract

The connection comprises a moulded body structure (23) that has limited gas permeability. A number of fins (23C) are formed on the external body section with an electrical conductor (18). mounted within the body section. The connector is mounted to an external metallic wall (17) of a structure.

Description

L'invention concerne une traversée de courant hermétiquement étanche pour appareil électrique d'extérieur à isolation gazeuse et plus particulièrement d'une traversée de courant destinée à assurer le raccordement d'un conducteur nu sur un appareil de type blindé dont l'enveloppe métallique de blindage est mise à la terre. Il existe des traversées de courant réalisées en matériau synthétique moulé pour appareil électrique d'extérieur. Un exemple d'une telle traversée est montré sur la figure 1, cette traversée comporte un conducteur central 1 surmoulé de résine isolante 2 et elle comporte une bride de fixation moulée 3 dans la même matière. Un écran 4 de contrôle du champ est généralement noyé dans la résine entre la bride et le conducteur dans la zone où la traversée se monte dans l'ouverture prévue pour elle dans une paroi 5 de l'enveloppe métallique d'un appareil. La bride se fixe à la paroi par boulonnage et d'une manière non représentée ici, elle possède une gorge annulaire 6 pour un joint 6 d'étanchéité permettant d'obtenir un montage de la traversée sur la paroi qui soit hermétiquement étanche. Ce type de traversée a pour inconvénients d'utiliser un matériau relativement fragile, d'impliquer l'utilisation d'un joint dont le montage est délicat à réaliser et d'un écran de contrôle de champ dont le positionnement est critique. De plus la forme extérieure de la traversée dans la zone de contrainte, d'allure conique, comprise entre la bride et les ailettes 7, ne permet pas le montage de transformateurs toriques de courant.The invention relates to a hermetically sealed current crossing for gas-insulated outdoor electrical appliance and more particularly a current crossing intended to ensure the connection of a bare conductor to a armored type device with a metallic shielding shell. There are current bushings made of molded synthetic material for outdoor electrical appliance. An example of such a crossing is shown on the Figure 1, this crossing comprises a central conductor 1 overmolded with resin insulating 2 and it comprises a fixing flange molded 3 in the same material. A field control screen 4 is generally embedded in the resin between the flange and conductor in the area where the bushing mounts in the opening provided for it in a wall 5 of the metal casing of an appliance. The bridle is fixed to the wall by bolting and in a way not shown here, it has an annular groove 6 for a seal 6 for obtaining a fitting of the bushing on the wall which is hermetically sealed. This kind of drawbacks have the disadvantage of using a relatively fragile material, involve the use of a gasket which is difficult to assemble and a field control screen whose positioning is critical. Plus the shape outside of the crossing in the constraint zone, conical in shape, included between the flange and the fins 7, does not allow the mounting of transformers current torics.

Il existe aussi des traversées, de type composite, dont un exemple est montré sur la figure 2. Une telle traversée comporte un noyau en résine moulée 9 autour d'un conducteur central 8 et une bride de fixation 10 moulée avec le noyau. La surface externe de la bride et d'une partie cylindrique 9A du noyau qui lui fait suite est recouverte d'un revêtement conducteur 11 destiné à être mis à la terre, lorsque la traversée est en place. La partie cylindrique métallisée 9A permet le montage d'au moins un transformateur torique de courant 12 positionné au voisinage de la bride de fixation. Un cône de répartition de champ électrique 13 vient s'enfiler sur le noyau à la suite du ou des transformateurs de courant et avant une série d'ailettes 14 en matériau élastomère qui sont empilées sur le noyau à la suite l'une de l'autre. Ce cône équivaut fonctionnellement à la zone de contrainte, conique, comportée par la traversée montrée sur la figure 1 et il permet de contrôler le champ à l'extrémité de la métallisation qui recouvre la partie cylindrique 9A et une partie de lui-même qui fait suite à cette partie lorsque la traversée est assemblée. La ligne de fuite électrique souhaitée est obtenue par l'intermédiaire de la pile d'ailettes 14 comme connu de l'homme de métier. Ce second type de traversée se fixe sur la paroi 15 d'une enveloppe métallique d'appareil de la même manière que le premier type évoqué plus haut et il implique la mise en place du même type de joint d'étanchéité, il présente donc les mêmes inconvénients à ce sujet. Il présente aussi l'inconvénient de mettre en oeuvre un nombre relativement important de pièces différentes dont la réalisation et le montage impliquent une succession d'opérations et notamment d'opérations manuelles. En dernier lieu, un démontage des ailettes et du cône de répartition de champ électrique est nécessaire, si un remplacement d'un transformateur torique est à réaliser, par exemple suite à une défaillance.There are also composite crossings, an example of which is shown on Figure 2. Such a crossing comprises a molded resin core 9 around a central conductor 8 and a fixing flange 10 molded with the core. The surface external of the flange and a cylindrical part 9A of the core which follows it is covered with a conductive coating 11 intended to be earthed, when the crossing is in place. The metallized cylindrical part 9A allows mounting at least one toroidal current transformer 12 positioned in the vicinity of the clamp. An electric field distribution cone 13 is threaded on the core following the current transformer (s) and before a series fins 14 made of elastomeric material which are stacked on the core one after the other the other. This cone is functionally equivalent to the stress zone, conical, included by the crossing shown in Figure 1 and it allows to control the field at the end of the metallization which covers the cylindrical part 9A and a part of himself which follows this part when the crossing is Assembly. The desired electrical creepage distance is obtained through the stack of fins 14 as known to those skilled in the art. This second type of crossing is fixed on the wall 15 of a metal casing of an appliance of the same way that the first type mentioned above and it involves the establishment of the same type of seal, so it has the same disadvantages topic. It also has the disadvantage of implementing a relatively large number important of different parts whose realization and assembly imply a succession of operations and in particular manual operations. Finally, a disassembly of the fins and the electric field distribution cone is necessary, if a toroidal transformer replacement is to be carried out, by example following a failure.

L'invention propose donc une traversée de courant hermétiquement étanche pour appareil électrique d'extérieur à isolation gazeuse, plus particulièrement destinée à assurer le raccordement d'un conducteur nu à un appareil, logé dans une l'enveloppe métallique dont une paroi est dotée d'une ouverture prévue pour permettre le raccordement d'un élément conducteur de l'appareil à une extrémité d'un élément conducteur axialement logé dans la traversée.The invention therefore provides a hermetically sealed current crossing for gas-insulated outdoor electrical appliance, more particularly intended for ensure the connection of a bare conductor to a device, housed in a the metal casing, one wall of which has an opening provided for allow connection of a conductive element of the device at one end a conductive element axially housed in the bushing.

L'invention, ses caractéristiques et ses avantages sont précisés dans la description qui suit en liaison avec la figure 3 de la liste de figures évoquées ci-dessous où :

  • la figure 1 présente un exemple d'une première traversée de courant connue ;
  • la figure 2 présente un exemple d'une seconde traversée de courant connue ;
  • la figure 3 présente un exemple d'une traversée de courant selon l'invention.
The invention, its characteristics and its advantages are specified in the description which follows in conjunction with FIG. 3 of the list of figures mentioned below where:
  • Figure 1 shows an example of a first known current crossing;
  • Figure 2 shows an example of a second known current crossing;
  • Figure 3 shows an example of a current crossing according to the invention.

La traversée de courant, selon l'invention, qui est illustrée sur la figure 3 est destinée à venir se monter au niveau d'une ouverture 16 prévue pour elle dans une paroi métallique 17 de l'enveloppe d'un appareil, de type blindé, logé dans une enceinte maintenue hermétiquement étanche remplie d'un gaz d'isolation électrique ou éventuellement sous vide. Cette traversée comporte un élément conducteur axial 18, destiné à venir se raccorder à un élément conducteur 19, correspondant, de l'appareil que contient l'enveloppe. Dans la réalisation présentée, cet élément conducteur 19 saille hors de l'enveloppe de l'appareil, au travers de l'ouverture 16 de cette enveloppe et il se raccorde bout à bout avec l'élément conducteur 18 qui vient se visser sur une tige filetée 21 portée par l'élément conducteur 19.The current crossing, according to the invention, which is illustrated in FIG. 3 is intended to come up at an opening 16 provided for it in a metal wall 17 of the casing of a device, of the armored type, housed in a enclosure kept hermetically sealed filled with an insulating gas electric or possibly under vacuum. This crossing has an element axial conductor 18, intended to be connected to a conductive element 19, the device in the envelope. In the realization presented, this conductive element 19 projects out of the envelope of the device, at through the opening 16 of this envelope and it is connected end to end with the conductive element 18 which is screwed onto a threaded rod 21 carried by the conductive element 19.

Une pièce de liaison et d'écran 20 permet la fixation de la traversée sur une enveloppe, elle est d'allure cylindrique et du genre bride métallique soudable. Dans l'exemple présenté, cette pièce est centrée sur l'élément conducteur 18 qui y pénètre partiellement par son extrémité de fixation à l'élément conducteur 19. Cette pièce de liaison et d'écran 20 est par exemple réalisée en acier inoxydable, elle comporte une partie 20A constituée d'un cylindre de révolution dont le diamètre correspond à celui de l'ouverture 16 de la paroi 17 d'enveloppe au niveau de laquelle elle se fixe de manière étanche, sans joint et par soudage. Cette pièce de liaison et d'écran est donc au même potentiel que le reste de l'enveloppe de l'appareil qui est usuellement mise à la terre. La longueur de la partie 20A est choisie pour lui permettre de recevoir extérieurement un ou des transformateurs toriques de courant 22, de diamètre approprié, qui vienne(nt) la ceinturer.A connecting piece and screen 20 allows the fixing of the crossing on a envelope, it is cylindrical in appearance and of the weldable metal flange type. In the example presented, this part is centered on the conductive element 18 which there partially penetrates through its end for fixing to the conductive element 19. This connection and screen part 20 is for example made of stainless steel, it comprises a part 20A consisting of a cylinder of revolution, the diameter corresponds to that of the opening 16 of the wall 17 of the envelope at level where it is fixed tightly, seamlessly and by welding. This connecting piece and screen is therefore at the same potential as the rest of the envelope of the appliance which is usually earthed. The length of part 20A is chosen to allow it to receive one or more transformers externally toric current 22, of appropriate diameter, which comes (s) around the belt.

La partie de la pièce de liaison et d'écran 20, qui est à l'opposé de celle par laquelle cette pièce se soude sur une paroi 17 d'une enveloppe d'appareil, se prolonge par une partie 20B de diamètre progressivement décroissant et d'allure au moins approximativement tronconique. Cette partie 20B se prolonge elle-même par un court élément cylindrique de révolution 20C dont l'extrémité 20D est évasée et présente un bord roulé. Le diamètre de la partie 20C est compris entre celui de l'élément conducteur 18 et celui de la partie 20A. La pièce 20 est conformée de manière à constituer un écran de contrôle du champ électrique se créant entre elle qui est à la terre et l'élément conducteur 18, lorsque celui-ci est sous tension. Elle est immobilisée par rapport à l'élément conducteur 18 par un corps 23 réalisé en un matériau isolant.The part of the connecting piece and screen 20, which is opposite to that by which this part is welded to a wall 17 of an appliance casing, is extends by a portion 20B of progressively decreasing diameter and pace at least approximately frustoconical. This part 20B extends itself by a short cylindrical element of revolution 20C whose end 20D is flared and has a rolled edge. The diameter of part 20C is included between that of the conductive element 18 and that of the part 20A. Room 20 is shaped so as to constitute a screen for controlling the electric field creating between it which is grounded and the conductive element 18, when the latter is under pressure. It is immobilized relative to the conductive element 18 by a body 23 made of an insulating material.

Ce corps de traversée 23 est réalisé par moulage sur l'élément conducteur 18 qu'il recouvre ici, sauf aux extrémités, et sur les parties de pièce de liaison et d'écran 20A, 20B et 20C qu'il englobe. D'allure tubulaire, il forme bouchon et il s'étend selon l'axe de longitudinal de l'élément conducteur 18 de la traversée de courant. Selon une forme préférée de réalisation, ce corps 23 est préférablement réalisé dans un matériau élastomère dur, peu perméable au gaz et possédant une grande tenue en atmosphère extérieure pour tenir compte des conditions usuelles d'exploitation des appareils équipés de telles traversées de courant. Le niveau d'étanchéité nécessaire peut être obtenu par adhésion de l'élastomère sur les inserts que constituent l'élément conducteur 18 et les parties de pièce de liaison et d'écran 20B, 20C, 20D, après dépôt d'un primaire d'adhésion sur ces inserts, ou encore par moulage direct du corps sur l'élément conducteur 18 et sur la pièce 20. Il est aussi envisagé de réaliser le corps de traversée 23 en un matériau du genre résine possédant des qualités correspondant à celles qui sont envisagées ci-dessus. La partie de la pièce de liaison et d'écran 20 destinée à être recouverte par la résine du corps de traversée 23 est alors préalablement recouverte par une couche d'étanchéité en matériau élastomère sur laquelle est surmoulée la résine destinée à constituer le corps de traversée.This bushing body 23 is produced by molding on the conductive element 18 which it overlaps here, except at the ends, and on the connecting piece and screen parts 20A, 20B and 20C which it encompasses. Tubular in shape, it forms a plug and it extends along the longitudinal axis of the conductive element 18 of the current crossing. According to a preferred embodiment, this body 23 is preferably made in a hard elastomeric material, not very permeable to gas and having a large held in an outdoor atmosphere to take account of usual conditions operating devices equipped with such current crossings. Level required sealing can be obtained by adhesion of the elastomer on the inserts which constitute the conductive element 18 and the parts of connection piece and screen 20B, 20C, 20D, after depositing an adhesion primer on these inserts, or again by direct molding of the body on the conductive element 18 and on the part 20. It is also envisaged to produce the crossing body 23 in a material of the kind resin having qualities corresponding to those which are envisaged above. The part of the connecting piece and screen 20 intended to be covered by the resin of the bushing body 23 is then previously covered by a layer sealing in elastomeric material on which the resin intended for constitute the crossing body.

Le moulage du corps de traversée 23 qui s'effectue en une fois, assure simultanément la réalisation d'une pièce regroupant un noyau 23A, dans lequel est longitudinalement logé l'élément conducteur central 18, un cône de répartition de champ électrique 23B, englobant les parties de pièce de liaison et d'écran 20B, 20C, 20D, ainsi qu'une succession d'ailettes 23C.The molding of the bushing body 23 which is carried out at once, ensures simultaneously the production of a part grouping a core 23A, in which is longitudinally housed the central conductive element 18, a distribution cone of electric field 23B, including the connecting piece and screen parts 20B, 20C, 20D, as well as a succession of fins 23C.

Le contrôle des caractéristiques en matière de champ électrique, au niveau de la traversée de courant selon l'invention, est obtenu en donnant une forme conique appropriée au corps de traversée 23 autour des parties de la pièce de liaison et d'écran 20 qui y sont englobées à distance de l'interface air-élastomère d'allure conique. Comme déjà indiqué plus haut, cette pièce de liaison et d'écran 20 est mise à la terre du fait de son soudage sur la paroi 17 d'enveloppe de cellule où se trouve l'ouverture 16 qu'elle entoure, étant bien entendu supposé que cette enveloppe est elle-même à la terre.Checking the characteristics of the electric field at the level of the current crossing according to the invention, is obtained by giving a conical shape suitable for the bushing 23 around the parts of the connecting piece and screen 20 included therein at a distance from the air-elastomer interface conical. As already indicated above, this connecting piece and screen 20 is earthing due to its welding on the wall 17 of the cell envelope where finds the opening 16 which it surrounds, being of course assumed that this envelope is itself grounded.

La partie de corps de traversée 23 qui se trouve sous la partie 20B de la pièce de liaison et d'écran et qui se loge donc dans la partie cylindrique 20A est d'allure tronconique et se réduit depuis la partie 23B jusqu'à avoir un diamètre peu différent de celui de l'élément conducteur 18. Elle a une longueur qui peut être réduite, lorsque l'enceinte où vient se loger la traversée est remplie de gaz isolant à grande tenue diélectrique.The bushing body part 23 which is located under part 20B of the connection and screen and which is therefore housed in the cylindrical part 20A is of frustoconical and reduces from part 23B until it has a small diameter different from that of the conductive element 18. It has a length which can be reduced, when the enclosure where the bushing is housed is filled with insulating gas with high dielectric strength.

Le diamètre hors tout de la traversée est maintenu à une valeur faible, quoique suffisante pour assurer un champ électrique réduit dans l'air au niveau du cône de répartition de champ électrique, en raison du rétrécissement qu'autorise la tenue diélectrique de la couche de matériau isolant présente entre la bride 20 et l'élément conducteur 18. Il est prévu qu'il soit au plus égal à celui prévu pour la partie de pièce de liaison et d'écran 20A, la plus large de la pièce 20, afin de permettre la mise en place et le retrait d'un ou de plusieurs transformateurs de courant 22 sans autre déplacement d'élément de traversée de courant.The overall diameter of the bushing is kept low, although sufficient to ensure a reduced electric field in the air at the cone of electric field distribution, due to the shrinkage that the holding allows dielectric of the layer of insulating material present between the flange 20 and the conductive element 18. It is intended to be at most equal to that provided for the part of connection piece and screen 20A, the widest part of piece 20, in order to allow the installation and removal of one or more transformers current 22 without further displacement of current crossing element.

La partie cylindrique 20C de diamètre réduit de la bride 20, qui est concentrique à l'élément conducteur 18, s'étend sur une longueur choisie de manière connue de l'homme de métier, afin que la traversée possède la rigidité et la tenue à la flexion lui permettant de résister aux efforts de flexion susceptibles de lui être appliqués au niveau de son extrémité externe. L'évasement constitué par la partie 20D permet de réduire la concentration du champ à ce niveau d'extrémité.The reduced diameter cylindrical part 20C of the flange 20, which is concentric with the conductive element 18 extends over a length chosen in a known manner from the skilled person, so that the crossing has rigidity and resistance to bending allowing it to resist the bending forces that may be applied to it at its outer end. The flaring made up of part 20D reduces the field concentration at this end level.

Il est bien entendu envisageable de prévoir une forme d'extrémité à souder d'une traversée, selon l'invention, qui soit adaptée à la forme de la paroi d'enveloppe sur laquelle cette traversée vient se monter et plus particulièrement à la forme de l'ouverture en périphérie de laquelle la partie de pièce de liaison et d'écran 20A vient se positionner et se souder par son extrémité. Cette extrémité peut notamment être une section transversale plane dans le cas d'une paroi 17 plane et une section en gueule de loup dans le cas d'une paroi 17 cylindrique de révolution.It is of course conceivable to provide a form of end to be welded with a bushing, according to the invention, which is adapted to the shape of the envelope wall on which this crossing comes to mount and more particularly in the form of the opening at the periphery of which the connecting piece and screen part 20A is positioned and welded at its end. This end can in particular be a planar cross section in the case of a planar wall 17 and a wolf's mouth section in the case of a cylindrical wall 17 of revolution.

Claims (7)

  1. A hermetically sealed current feedthrough for gas-insulated outdoor electrical gear, the feedthrough being intended more particularly to provide connection to a bare conductor of a piece of gear housed inside metal cladding including a wall (17) provided with an opening (16) designed to put a conductive element (19) of the gear into connection with one end of a conductive element (18) housed axially inside the feedthrough, characterized in that said current feedthrough includes a metal link and screen piece (20) of cylindrical appearance that is held coaxially about the conductive element (18) by a body (23) of molded insulating material covering it in part and forming a plug that is impermeable to gas, and in that said link piece is terminated by a cylindrical portion (20A) projecting from the body, with said piece being welded to the periphery of the opening (16) via the end of said cylindrical portion.
  2. A current feedthrough according to claim 1, in which the link and screen piece has a first circularly cylindrical portion (20A) whose diameter corresponds to the diameter of the opening (16) for the connection conductor element of the gear, at the periphery of which opening it is welded, where said first cylindrical portion is extended in the form of an electric field control screen by a portion (20B) of progressively tapering diameter situated remote from the end of the cylindrical first portion via which the piece is welded, and itself extended by a second cylindrical portion (20C) of diameter lying between the diameter of the welded first circularly cylindrical portion (20A) and the diameter of the conductor (18) of the feedthrough, and in which the second cylindrical portion is terminated by a flared portion (20D).
  3. A current feedthrough according to claim 1 or 2, in which the body (23) is a single block body of tubular shape made by being molded around the conductive element (18) of the feedthrough, covering said element except at its ends, forming a core (23A) for housing said element, the body having fins for deflecting the creepage line (23C) and having the link and screen piece embedded therein with the exception of the portion (20A) thereof whereby said piece is welded, so as to extend the core by a cone-forming portion for distributing the electric field.
  4. A current feedthrough according to claim 3, in which the outside diameter of the body (23) is no greater than that of the largest portion (20A) of the link and screen piece which is to be found at the welding end of said piece, thereby enabling at least one toroidal current transformer of diameter corresponding to said largest portion to be installed and removed.
  5. A current feedthrough according to any one of claims 1 to 4, in which the body of insulating material is made of a hard elastomer that is impermeable to gas and that withstands the outside atmosphere well.
  6. A current feedthrough according to any one of claims 1 to 4, in which the body of insulating material is made of a resin that is impermeable to gas and that withstands the outside atmosphere well, which resin is overmolded on the link and screen piece which is covered where it is overmolded in a sealing layer of elastomer material.
  7. A current feedthrough according to any one of claims 1 to 6, in which the link and screen piece is a piece of stainless steel.
EP99403125A 1998-12-18 1999-12-13 Hermetically sealed feedthrough bushing for external electrical apparatus Expired - Lifetime EP1014389B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9815982 1998-12-18
FR9815982A FR2787624B1 (en) 1998-12-18 1998-12-18 HERMETICALLY WATERPROOF CURRENT CROSSOVER FOR OUTDOOR ELECTRICAL APPLIANCE

Publications (2)

Publication Number Publication Date
EP1014389A1 EP1014389A1 (en) 2000-06-28
EP1014389B1 true EP1014389B1 (en) 2004-02-04

Family

ID=9534116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99403125A Expired - Lifetime EP1014389B1 (en) 1998-12-18 1999-12-13 Hermetically sealed feedthrough bushing for external electrical apparatus

Country Status (13)

Country Link
US (1) US6255589B1 (en)
EP (1) EP1014389B1 (en)
CN (1) CN1159822C (en)
AT (1) ATE259092T1 (en)
AU (1) AU760410B2 (en)
BR (1) BR9905897A (en)
CA (1) CA2292818A1 (en)
DE (1) DE69914576T2 (en)
ES (1) ES2214829T3 (en)
FR (1) FR2787624B1 (en)
NZ (1) NZ501788A (en)
PT (1) PT1014389E (en)
TR (1) TR199903116A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6346677B1 (en) * 1999-09-08 2002-02-12 Electro Composites, Inc. High-voltage bushing provided with external shields
DE102005059754B4 (en) * 2005-12-09 2010-05-27 Siemens Ag Injection molded outer cone bushing
FR2919955B1 (en) * 2007-08-07 2009-10-30 Areva T & D Sa DEVICE FOR CONTROLLING A HIGH ELECTRIC FIELD IN AN INSULATING SYNTHETIC MATERIAL, IN PARTICULAR FOR A CURRENT THROUGH A WALL THROUGH A WALL
FR2923954B1 (en) * 2007-11-20 2010-02-26 Schneider Electric Ind Sas BLIND CONNECTION OF TWO TERMINALS BY CONTACT BETWEEN PLANAR INTERFACES.
CN104508926B (en) * 2012-09-26 2016-10-26 三菱电机株式会社 Electric power switch unit
US9601912B2 (en) 2014-06-23 2017-03-21 Schneider Electric USA, Inc. Compact transformer bushing
CN105119069B (en) * 2015-09-09 2017-07-14 国网山东夏津县供电公司 A kind of digital transformer substation is used to become high pressure porcelain bushing shell wiring collet
CN105140670A (en) * 2015-10-14 2015-12-09 金坛市德博密封技术有限公司 Connector sealing member used for communication cable
DE102019210368A1 (en) * 2019-07-12 2021-01-14 Vitesco Technologies GmbH Electric power feedthrough
CN113131432B (en) * 2020-01-14 2023-03-14 香港浩岳国际有限公司 Explosion-proof plug-in capacitive cable outdoor terminal and preparation method
EP3979266A1 (en) * 2020-09-30 2022-04-06 Hitachi Energy Switzerland AG Support for mounting an accessory equipment assembly to a base of bushing, a corresponding accessory equipment module, and bushing
CN113074252B (en) * 2021-03-12 2023-02-24 山东英信计算机技术有限公司 Sealing wire hole plug

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018318A (en) * 1957-07-15 1962-01-23 Components For Res Inc High voltage cable terminal with stress cones
US3178505A (en) * 1962-05-09 1965-04-13 Westinghouse Electric Corp Terminal-bushing construction
US3318995A (en) * 1966-04-25 1967-05-09 Westinghouse Electric Corp Cast electrical bushing construction having controlled and shielded shrinkage voids
US3523157A (en) * 1969-01-03 1970-08-04 Allis Chalmers Mfg Co Cast insulating bushing with axially disposed electrical cable
US3705281A (en) * 1971-04-29 1972-12-05 Joslyn Mfg & Supply Co Bushing insulator improvements for a dead tank vacuum switch
US4431859A (en) * 1980-11-27 1984-02-14 Mitsubishi Denki Kabushiki Kaisha Bushing for gas-insulated electrical equipment
DE3208358C2 (en) * 1982-03-09 1984-03-08 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Process for the production of a cast resin insulator with capacitive field control inserts
US4670625A (en) * 1984-07-24 1987-06-02 Wood Henry S Electrical insulating bushing with a weather-resistant sheath
FR2729785A1 (en) * 1995-01-24 1996-07-26 Gec Alsthom T & D Sa Electrical insulator bushing with improved potential gradient for electrical appts. with metallic enclosure

Also Published As

Publication number Publication date
US6255589B1 (en) 2001-07-03
CN1258122A (en) 2000-06-28
CN1159822C (en) 2004-07-28
PT1014389E (en) 2004-06-30
DE69914576D1 (en) 2004-03-11
ES2214829T3 (en) 2004-09-16
FR2787624B1 (en) 2001-01-19
TR199903116A3 (en) 2000-07-21
ATE259092T1 (en) 2004-02-15
EP1014389A1 (en) 2000-06-28
FR2787624A1 (en) 2000-06-23
NZ501788A (en) 2001-04-27
AU6529599A (en) 2000-06-22
AU760410B2 (en) 2003-05-15
TR199903116A2 (en) 2000-07-21
CA2292818A1 (en) 2000-06-18
DE69914576T2 (en) 2004-09-16
BR9905897A (en) 2000-08-08

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