EP0935264A1 - Current transformer for a gas-insulated switch installation - Google Patents

Current transformer for a gas-insulated switch installation Download PDF

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Publication number
EP0935264A1
EP0935264A1 EP99400205A EP99400205A EP0935264A1 EP 0935264 A1 EP0935264 A1 EP 0935264A1 EP 99400205 A EP99400205 A EP 99400205A EP 99400205 A EP99400205 A EP 99400205A EP 0935264 A1 EP0935264 A1 EP 0935264A1
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EP
European Patent Office
Prior art keywords
transformer according
flanges
closing
transformer
connecting rods
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Granted
Application number
EP99400205A
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German (de)
French (fr)
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EP0935264B1 (en
Inventor
Carmelo Gimeno
André Doessegger
Christian Tschannen
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GE Grid Switzerland GmbH
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Alstom AG
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Publication of EP0935264A1 publication Critical patent/EP0935264A1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20Instruments transformers
    • H01F38/22Instruments transformers for single phase ac
    • H01F38/28Current transformers
    • H01F38/30Constructions

Definitions

  • the present invention relates to an intensity transformer for a single-phase or multi-phase switching installation, isolated gas, comprising at least one support tube on which is mounted at minus a secondary winding containing a magnetic core, this tube being crossed by a primary conductor, and electrically connected, to its ends, with two polygonal metal plates, arranged in parallel, constituting closing flanges of an enclosure containing in particular said magnetic core and said secondary winding.
  • German utility certificate DE-GM 7914263 describes a transformer of unipolar intensity of this type.
  • the core support tube is put in place in suitable recesses in two end plates.
  • An insulation ring is associated with a plate to avoid a bond between the two plates through the support tube.
  • a tube peripheral cylindrical surrounding the core is disposed between the two plates which are also coupled to each other by means of screws Tightening. The length adjustment of the support tube and the cylindrical tube device allows to realize in a simple way different transformers provided with a variable number of cores having different lengths.
  • the outside diameter of the transformer must be greater than that of the largest core, to provide space for the passage of the clamping screws. Since the diameter of the transformer is crucial to assess the size of a multipolar installation, since it defines the distance between the transformers corresponding respectively to each phase, the recommended solution is not advantageous because it does not allow the dimensions to be reduced of the installation.
  • EP 0 665 561 A1 The European patent application published under the number EP 0 665 561 A1 describes an intensity transformer with a unipolar annular core whose enclosure metal consists of two molded parts. One of these pieces constitutes a base plate and the other part constitutes the side walls of the metal enclosure and the upper closure plate. The two parts each have a peripheral belt, these belts being arranged to be juxtaposed and partially nested and pressed against each other the other by bolts. The diameter of these belts is greater than core diameter.
  • the object of the present invention is to produce a current intensity transformer this simple type of construction, which can be made in several dimensions and, in particular, with magnetic cores of different lengths, and at using components that are easy to manufacture.
  • the transformer according to the invention characterized in that that the support tube is gas tight and fits at its ends, sealingly, in appropriate recesses in said enclosure closing flanges, one of said ends being connected said corresponding closing flange by an intermediate ring of a insulating material, and said closing flanges being interconnected by rigid connecting rods arranged in the corners of these flanges.
  • the flanges of closure are common to several corresponding magnetic cores respectively with several phases and each comprise several recesses arranged for receiving and sealingly accommodating one end a support tube for one of the magnetic cores corresponding to one of the phases.
  • said recesses are arranged linearly.
  • the connecting rods are electrically connected at their ends with the flanges of closing. This connection is made by screwing with said closing flanges.
  • the transformer can also have two connecting rods arranged between two adjacent secondary windings corresponding to two of the installation phases.
  • said closure flanges are identical.
  • the secondary winding is advantageously made integral with one of said closing flanges by means of at least one tightening strap and said flange has at least one protuberance and an opening in this protuberance to allow the passage of said strap Tightening.
  • the connecting rods are of cross section quadrangular and said enclosure has fixed side walls to said connecting rods.
  • Said side walls are advantageously fixed to the connecting rods to the screw means, and the screws are arranged asymmetrically with respect to the longitudinal axis of the transformer.
  • the transformer includes a connection box containing connection terminals electrically connected to the said secondary windings.
  • the single-phase current transformer 10 as shown comprises a support tube 11 carrying at least one, but in this case three annular cores 12, 13 and 14 respectively surrounded by secondary windings 15, 16 and 17. These secondary windings are superimposed and arranged coaxially with respect to the support tube 11. They are tightened against each other by means of a tightening strap 18.
  • the support tube 11 as well as the secondary windings 15, 16 and 17 are arranged inside an enclosure 19 defined by two plates of metal constituting respectively a lower closing flange 20 and an upper closing flange 21, and by four side walls formed by metal plates 22, 23, 24 and 25.
  • the closing flanges 20 and 21 are interconnected by rods of connection 26 arranged at the corners of the closing flanges 20 and 21, which have preferably a polygonal shape and, in this case, a shape square.
  • the two closing flanges 20 and 21 are fixed by screwing to the ends of connecting rods 26 and metal plates 22, 23, 24 and 25 are screwed onto the connecting rods 26.
  • the lower closing flange 20 has two protrusions 27 and 28, diametrically opposite, and each comprising a through opening, 29 and 30 respectively, allowing the passage of two tightening straps 18, diametrically opposite, provided to maintain the position secondary windings around the support tube 11.
  • the tube support 11 is housed at its ends in recesses in the two closing flanges 20 and 21
  • these two flanges are suitably shaped to receive these ends of the support tube.
  • Annular seals 37 seal between the support tube 11 and the closing flanges 20, 21.
  • the support tube is electrically insulated relative to the lower closing flange 20 by means of a ring 38 insulating and is electrically connected to the upper closing flange 21.
  • connection box 32 containing connection terminals is mounted laterally on the transformer 10 and more particularly on the metal plate 23 constituting one of the side walls of the enclosure 19.
  • Figure 3 mainly illustrates the juxtaposition of two transformers of intensity 10 such as that defined above.
  • these screws are fixed asymmetrically.
  • Two screws of a plate, one of which is arranged near its angle upper and the other near its lower opposite corner, are used to fix the plate to the two corresponding connecting rods 26. This this procedure makes it possible to reduce the size of the transformer.
  • the lower and upper closing flanges have the same profile, which reduces manufacturing costs and avoids the storage of two different rooms.
  • the multiphase intensity transformer 10a has three support tubes 11a, 11b and 11c each carrying at least one, but in this case three annular cores 12a, 12b, 12c; 13a, 13b, 13c; 14a, 14b, 14c respectively surrounded by secondary windings 15a, 15b, 15c; 16a, 16b, 16c; 17a, 17b, 17c.
  • These windings are superimposed and arranged coaxially like those of the transformer 10 described above. They are also tightened and held in place by tightening straps 18a.
  • the support tubes 11a, 11b and 11c as well as the coils correspondents are arranged inside an enclosure 19a defined by two metal plates respectively constituting a closing flange lower 20a and an upper closing flange 21a and by four walls lateral formed by metal plates 22a, 23a, 24a and 25a.
  • the enclosure 19a is common for the three support tubes and the corresponding secondary windings.
  • the closing flanges 20a and 21a have profiled recesses of suitably to receive the ends of the support tubes. These tubes are electrically insulated from the lower closing flange 20a thanks to a ring of an electrically insulating material and electrically connected to the upper closing flange 21a.
  • the closing flanges 20a and 21a are interconnected by rods of link 26a arranged at the corners of the form closing flanges rectangular and by intermediate connecting rods 26b, arranged two to two between two adjacent support tubes and the secondary windings correspondents.
  • the metal plates 22a, 23a, 24a and 25a constituting the side walls are rectangular in shape and are screwed directly on the connecting rods 26a and 26b.
  • the intensity transformer according to the invention makes it possible to group the components corresponding to the different phases so as to reduce clutter.
  • the size of the enclosure is barely greater than that of the secondary winding (s).
  • the grouping of several phases generates a slightly clutter greater than that generated by the combination of several phases in the same enclosure according to the multiphase embodiment.
  • this current transformer is also advantageous from the causes a variation in the dimensions of the support tube, of the core magnetic and secondary windings does not entail additional costs important.
  • the construction is easy and results in a robust device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Transformer Cooling (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

Typically three annular secondary coils (15,16,17) are placed over a central tube (11) so they stack on top of each other, and are strapped in place. The tube sits inside a sealed enclosure, having its two end faces (20,21) constructed with flanges to fasten to the tube and provide a gas tight seal. One end face also has an insulating gasket (31) on its outer edges to isolate it from the remainder of the enclosure.

Description

La présente invention concerne un transformateur d'intensité pour une installation de commutation monophasée ou multiphasée, à isolation gazeuse, comportant au moins un tube de support sur lequel est monté au moins un bobinage secondaire contenant un noyau magnétique, ce tube étant traversé par un conducteur primaire, et connecté électriquement, à ses extrémités, à deux plaques métalliques polygonales, disposées parallèlement, constituant des flasques de fermeture d'une enceinte contenant notamment ledit noyau magnétique et ledit bobinage secondaire.The present invention relates to an intensity transformer for a single-phase or multi-phase switching installation, isolated gas, comprising at least one support tube on which is mounted at minus a secondary winding containing a magnetic core, this tube being crossed by a primary conductor, and electrically connected, to its ends, with two polygonal metal plates, arranged in parallel, constituting closing flanges of an enclosure containing in particular said magnetic core and said secondary winding.

On connaít déjà des appareils de ce type qui présentent différents inconvénients auxquels la présente invention se propose d'apporter une solution avantageuse d'un point de vue technique et économique.We already know devices of this type that have different disadvantages to which the present invention proposes to provide a advantageous solution from a technical and economic point of view.

Le certificat d'utilité allemand DE-GM 7914263 décrit un transformateur d'intensité unipolaire de ce type. Le tube support du noyau est mis en place dans des évidements appropriés ménagés dans deux plaques d'extrémité. Une bague d'isolation est associée à une plaque pour éviter une liaison électrique entre les deux plaques à travers le tube support. Un tube cylindrique périphérique entourant le noyau est disposé entre les deux plaques qui sont par ailleurs couplées l'une à l'autre au moyen de vis de serrage. L'ajustage en longueur du tube de support et du tube cylindrique périphérique permet de réaliser de manière simple différents transformateurs pourvus d'un nombre variable de noyaux ayant des longueurs différentes.German utility certificate DE-GM 7914263 describes a transformer of unipolar intensity of this type. The core support tube is put in place in suitable recesses in two end plates. An insulation ring is associated with a plate to avoid a bond between the two plates through the support tube. A tube peripheral cylindrical surrounding the core is disposed between the two plates which are also coupled to each other by means of screws Tightening. The length adjustment of the support tube and the cylindrical tube device allows to realize in a simple way different transformers provided with a variable number of cores having different lengths.

Toutefois, le diamètre extérieur du transformateur est obligatoirement supérieur à celui du noyau le plus grand, pour ménager un espace permettant le passage des vis de serrage. Etant donné que le diamètre du transformateur est déterminant pour évaluer l'encombrement d'une installation multipolaire, puisqu'il définit l'écart entre les transformateurs correspondant respectivement à chacune des phases, la solution préconisée n'est pas avantageuse parce qu'elle ne permet pas de réduire les dimensions de l'installation.However, the outside diameter of the transformer must be greater than that of the largest core, to provide space for the passage of the clamping screws. Since the diameter of the transformer is crucial to assess the size of a multipolar installation, since it defines the distance between the transformers corresponding respectively to each phase, the recommended solution is not advantageous because it does not allow the dimensions to be reduced of the installation.

La demande de brevet européen publiée sous le No EP 0 665 561 A1 décrit un transformateur d'intensité à noyau annulaire unipolaire dont l'enceinte métallique se compose de deux pièces moulées. L'une de ces pièces constitue une plaque de base et l'autre pièce constitue les parois latérales de l'enceinte métallique et la plaque de fermeture supérieure. Les deux parties comportent chacune une ceinture périphérique, ces ceintures étant agencées pour être juxtaposées et partiellement emboítées et serrées l'une contre l'autre par des boulons. Le diamètre de ces ceintures est supérieur au diamètre du noyau.The European patent application published under the number EP 0 665 561 A1 describes an intensity transformer with a unipolar annular core whose enclosure metal consists of two molded parts. One of these pieces constitutes a base plate and the other part constitutes the side walls of the metal enclosure and the upper closure plate. The two parts each have a peripheral belt, these belts being arranged to be juxtaposed and partially nested and pressed against each other the other by bolts. The diameter of these belts is greater than core diameter.

Pour modifier la longueur du transformateur d'intensité, il est nécessaire de modifier en conséquence la longueur des deux pièces moulées. La conséquence en est que, pour chaque type de transformateur d'intensité, il est obligatoire de réaliser deux moules correspondant respectivement aux deux pièces moulées ayant des longueurs distinctes.To modify the length of the current transformer, it is necessary to modify the length of the two molded parts accordingly. The consequence is that, for each type of current transformer, there it is compulsory to make two molds corresponding respectively to two molded parts having different lengths.

La présente invention a pour but de réaliser un transformateur d'intensité de ce type de construction simple, qui peut être réalisé en plusieurs dimensions et, en particulier, avec des noyaux magnétiques de différentes longueurs, et à l'aide de composants faciles à fabriquer.The object of the present invention is to produce a current intensity transformer this simple type of construction, which can be made in several dimensions and, in particular, with magnetic cores of different lengths, and at using components that are easy to manufacture.

Ce but est atteint par le transformateur selon l'invention, caractérisé en ce que le tube de support est étanche aux gaz et s'emboíte à ses extrémités, de façon étanche, dans des évidements appropriés ménagés dans lesdits flasques de fermeture de l'enceinte, l'une desdites extrémités étant connectée audit flasque de fermeture correspondant par un anneau intermédiaire d'un matériau isolant, et lesdits flasques de fermeture étant reliés entre eux par des tiges de liaison rigides disposées dans les angles de ces flasques.This object is achieved by the transformer according to the invention, characterized in that that the support tube is gas tight and fits at its ends, sealingly, in appropriate recesses in said enclosure closing flanges, one of said ends being connected said corresponding closing flange by an intermediate ring of a insulating material, and said closing flanges being interconnected by rigid connecting rods arranged in the corners of these flanges.

De façon avantageuse, pour une installation multiphasée, les flasques de fermeture sont communs à plusieurs noyaux magnétiques correspondant respectivement à plusieurs phases et comportent chacun plusieurs évidements agencés pour recevoir et loger de façon étanche une extrémité d'un tube de support d'un des noyaux magnétiques correspondant à une des phases.Advantageously, for a multiphase installation, the flanges of closure are common to several corresponding magnetic cores respectively with several phases and each comprise several recesses arranged for receiving and sealingly accommodating one end a support tube for one of the magnetic cores corresponding to one of the phases.

De préférence, lesdits évidements sont disposés linéairement.Preferably, said recesses are arranged linearly.

Dans une forme de réalisation préférée, les tiges de liaison sont électriquement connectées par leurs extrémités avec les flasques de fermeture. Cette liaison se fait par vissage avec lesdits flasques de fermeture.In a preferred embodiment, the connecting rods are electrically connected at their ends with the flanges of closing. This connection is made by screwing with said closing flanges.

Le transformateur peut en outre comporter deux tiges de liaison disposées entre deux bobinages secondaires adjacents correspondant à deux des phases de l'installation.The transformer can also have two connecting rods arranged between two adjacent secondary windings corresponding to two of the installation phases.

Dans la forme de réalisation préférée, lesdits flasques de fermeture sont identiques.In the preferred embodiment, said closure flanges are identical.

Le bobinage secondaire est avantageusement rendu solidaire de l'un desdits flasques de fermeture au moyen d'au moins une sangle de serrage et ledit flasque comporte au moins une protubérance et une ouverture ménagée dans cette protubérance pour permettre le passage de ladite sangle de serrage.The secondary winding is advantageously made integral with one of said closing flanges by means of at least one tightening strap and said flange has at least one protuberance and an opening in this protuberance to allow the passage of said strap Tightening.

De préférence, les tiges de liaison sont de section transversale quadrangulaire et ladite enceinte comporte des parois latérales fixées auxdites tiges de liaison. Preferably, the connecting rods are of cross section quadrangular and said enclosure has fixed side walls to said connecting rods.

Lesdites parois latérales sont avantageusement fixées aux tiges de liaison au moyen de vis, et les vis sont disposées de façon asymétrique par rapport à l'axe longitudinal du transformateur.Said side walls are advantageously fixed to the connecting rods to the screw means, and the screws are arranged asymmetrically with respect to the longitudinal axis of the transformer.

De façon avantageuse le transformateur comporte une boíte de connexion contenant des bornes de raccordement électriquement connectées auxdits bobinages secondaires.Advantageously, the transformer includes a connection box containing connection terminals electrically connected to the said secondary windings.

La présente invention sera mieux comprise en référence à la description d'un mode de réalisation et aux dessins annexés dans lesquels :

  • la figure 1 représente une vue en perspective éclatée d'un transformateur d'intensité monophasé selon l'invention,
  • la figure 2 est une vue en coupe axiale du transformateur d'intensité de la figure 1,
  • la figure 3 est une vue en élévation illustrant partiellement une installation comportant au moins deux transformateurs d'intensité correspondant à celui des figures 1 et 2,
  • la figure 4 est une vue en perspective, partiellement coupée, d'un transformateur d'intensité multiphasé selon l'invention,
  • la figure 5 est une vue de dessus du transformateur d'intensité de la figure 4,
  • la figure 6 est une vue en coupe axiale du transformateur d'intensité de la figure 5, et
  • la figure 7 est une vue en coupe transversale du transformateur d'intensité de la figure 5.
The present invention will be better understood with reference to the description of an embodiment and to the accompanying drawings in which:
  • FIG. 1 represents an exploded perspective view of a single-phase current transformer according to the invention,
  • FIG. 2 is a view in axial section of the intensity transformer of FIG. 1,
  • FIG. 3 is an elevation view partially illustrating an installation comprising at least two intensity transformers corresponding to that of FIGS. 1 and 2,
  • FIG. 4 is a perspective view, partially cut away, of a multiphase current transformer according to the invention,
  • FIG. 5 is a top view of the intensity transformer of FIG. 4,
  • FIG. 6 is a view in axial section of the intensity transformer of FIG. 5, and
  • FIG. 7 is a cross-sectional view of the intensity transformer of FIG. 5.

En référence aux figures 1 et 2, le transformateur d'intensité 10 monophasé tel que représenté comporte un tube de support 11 portant au moins un, mais dans le présent cas trois noyaux annulaires 12, 13 et 14 respectivement entourés de bobinages secondaires 15, 16 et 17. Ces bobinages secondaires sont superposés et disposés coaxialement par rapport au tube de support 11. Ils sont serrés les uns contre les autres au moyen d'une sangle de serrage 18. Le tube de support 11 ainsi que les bobinages secondaires 15, 16 et 17 sont disposés à l'intérieur d'une enceinte 19 définie par deux plaques métalliques constituant respectivement un flasque de fermeture inférieur 20 et un flasque de fermeture supérieur 21, et par quatre parois latérales constituées par des plaques métalliques 22, 23, 24 et 25.Referring to Figures 1 and 2, the single-phase current transformer 10 as shown comprises a support tube 11 carrying at least one, but in this case three annular cores 12, 13 and 14 respectively surrounded by secondary windings 15, 16 and 17. These secondary windings are superimposed and arranged coaxially with respect to the support tube 11. They are tightened against each other by means of a tightening strap 18. The support tube 11 as well as the secondary windings 15, 16 and 17 are arranged inside an enclosure 19 defined by two plates of metal constituting respectively a lower closing flange 20 and an upper closing flange 21, and by four side walls formed by metal plates 22, 23, 24 and 25.

Les flasques de fermeture 20 et 21 sont reliés entre eux par des tiges de liaison 26 disposées aux angles des flasques de fermeture 20 et 21, qui ont de préférence une forme polygonale et, dans le présent cas, une forme carrée. Les deux flasques de fermeture 20 et 21 sont fixés par vissage aux extrémités des tiges de liaison 26 et les plaques métalliques 22, 23, 24 et 25 sont vissées sur les tiges de liaison 26.The closing flanges 20 and 21 are interconnected by rods of connection 26 arranged at the corners of the closing flanges 20 and 21, which have preferably a polygonal shape and, in this case, a shape square. The two closing flanges 20 and 21 are fixed by screwing to the ends of connecting rods 26 and metal plates 22, 23, 24 and 25 are screwed onto the connecting rods 26.

Le flasque de fermeture inférieur 20 présente deux protubérances 27 et 28, diamétralement opposées, et comportant chacune une ouverture traversante, respectivement 29 et 30, permettant le passage de deux sangles de serrage 18, diamétralement opposées, prévues pour assurer le maintien en position des bobinages secondaires autour du tube support 11.The lower closing flange 20 has two protrusions 27 and 28, diametrically opposite, and each comprising a through opening, 29 and 30 respectively, allowing the passage of two tightening straps 18, diametrically opposite, provided to maintain the position secondary windings around the support tube 11.

Comme le montre plus particulièrement la vue en coupe de la figure 2, le tube de support 11 est logé, à ses extrémités, dans des évidements ménagés dans les deux flasques de fermeture 20 et 21 A cet effet, ces deux flasques sont profilés de façon appropriée pour recevoir ces extrémités du tube de support.. Des joints annulaires 37 assurent l'étanchéité entre le tube de support 11 et les flasques de fermeture 20, 21. Le tube de support est électriquement isolé par rapport au flasque de fermeture inférieur 20 au moyen d'un anneau 38 isolant et est électriquement connecté au flasque de fermeture supérieur 21.As shown more particularly in the sectional view of FIG. 2, the tube support 11 is housed at its ends in recesses in the two closing flanges 20 and 21 For this purpose, these two flanges are suitably shaped to receive these ends of the support tube. Annular seals 37 seal between the support tube 11 and the closing flanges 20, 21. The support tube is electrically insulated relative to the lower closing flange 20 by means of a ring 38 insulating and is electrically connected to the upper closing flange 21.

Une boíte de connexion 32 contenant des bornes de raccordement est montée latéralement sur le transformateur 10 et plus particulièrement sur la plaque métallique 23 constituant l'une des parois latérales de l'enceinte 19.A connection box 32 containing connection terminals is mounted laterally on the transformer 10 and more particularly on the metal plate 23 constituting one of the side walls of the enclosure 19.

La figure 3 illustre principalement la juxtaposition de deux transformateurs d'intensité 10 tels que celui défini ci-dessus. Afin d'éviter des surépaisseurs dues aux vis 33, 34 d'une part et 35, 36 d'autre part, de fixation des plaques métalliques constituant les parois latérales des deux transformateurs d'intensité disposés côte à côte, ces vis sont fixées de façon asymétrique. Deux vis d'une plaque, dont l'une est disposée à proximité de son angle supérieur et l'autre à proximité de son angle opposé inférieur, sont utilisées pour fixer la plaque aux deux tiges de liaison 26 correspondantes. Cette manière de procéder permet de diminuer l'encombrement du transformateur.Figure 3 mainly illustrates the juxtaposition of two transformers of intensity 10 such as that defined above. In order to avoid excess thickness due to the screws 33, 34 on the one hand and 35, 36 on the other hand, for fixing the plates metal forming the side walls of the two transformers intensity arranged side by side, these screws are fixed asymmetrically. Two screws of a plate, one of which is arranged near its angle upper and the other near its lower opposite corner, are used to fix the plate to the two corresponding connecting rods 26. This this procedure makes it possible to reduce the size of the transformer.

Par ailleurs, on notera que les flasques de fermeture inférieur et supérieur ont un même profil, ce qui permet de réduire les coûts de fabrication et d'éviter le stockage de deux pièces différentes.Furthermore, it will be noted that the lower and upper closing flanges have the same profile, which reduces manufacturing costs and avoids the storage of two different rooms.

En référence aux figures 4 à 7, le transformateur d'intensité multiphasé 10a, et plus spécifiquement triphasé représenté, comporte trois tubes de support 11a, 11b et 11c portant chacun au moins un, mais dans le présent cas trois noyaux annulaires 12a, 12b, 12c; 13a, 13b, 13c; 14a, 14b, 14c respectivement entourés de bobinages secondaires 15a, 15b, 15c; 16a, 16b, 16c; 17a, 17b, 17c. Ces bobinages sont superposés et disposés coaxialement comme ceux du transformateur 10 décrit précédemment. Ils sont également serrés et maintenus en place par des sangles de serrage 18a. Les tubes de support 11a, 11b et 11c ainsi que les bobinages correspondants sont disposés à l'intérieur d'une enceinte 19a définie par deux plaques métalliques constituant respectivement un flasque de fermeture inférieur 20a et un flasque de fermeture supérieur 21a et par quatre parois latérales constituées par des plaques métalliques 22a, 23a, 24a et 25a.With reference to FIGS. 4 to 7, the multiphase intensity transformer 10a, and more specifically three-phase shown, has three support tubes 11a, 11b and 11c each carrying at least one, but in this case three annular cores 12a, 12b, 12c; 13a, 13b, 13c; 14a, 14b, 14c respectively surrounded by secondary windings 15a, 15b, 15c; 16a, 16b, 16c; 17a, 17b, 17c. These windings are superimposed and arranged coaxially like those of the transformer 10 described above. They are also tightened and held in place by tightening straps 18a. The support tubes 11a, 11b and 11c as well as the coils correspondents are arranged inside an enclosure 19a defined by two metal plates respectively constituting a closing flange lower 20a and an upper closing flange 21a and by four walls lateral formed by metal plates 22a, 23a, 24a and 25a.

On notera que l'enceinte 19a est commune pour les trois tubes de support et les bobinages secondaires correspondants. Comme précédemment, les flasques de fermeture 20a et 21a comportent des évidements profilés de façon appropriée pour recevoir les extrémités des tubes de support. Ces tubes sont électriquement isolés par rapport au flasque de fermeture inférieur 20a grâce à un anneau d'un matériau électriquement isolant et électriquement connectée au flasque de fermeture supérieur 21a.It will be noted that the enclosure 19a is common for the three support tubes and the corresponding secondary windings. As before, the closing flanges 20a and 21a have profiled recesses of suitably to receive the ends of the support tubes. These tubes are electrically insulated from the lower closing flange 20a thanks to a ring of an electrically insulating material and electrically connected to the upper closing flange 21a.

Les flasques de fermeture 20a et 21a sont reliés entre eux par des tiges de liaison 26a disposées aux angles des flasques de fermeture de forme rectangulaire et par des tiges de liaison 26b intermédiaires, disposées deux à deux entre deux tubes de support adjacents et les bobinages secondaires correspondants.The closing flanges 20a and 21a are interconnected by rods of link 26a arranged at the corners of the form closing flanges rectangular and by intermediate connecting rods 26b, arranged two to two between two adjacent support tubes and the secondary windings correspondents.

Comme précédemment, les plaques métalliques 22a, 23a, 24a et 25a constituant les parois latérales sont de forme rectangulaire et sont vissées directement sur les tiges de liaison 26a et 26b.As before, the metal plates 22a, 23a, 24a and 25a constituting the side walls are rectangular in shape and are screwed directly on the connecting rods 26a and 26b.

Le transformateur d'intensité selon l'invention permet de regrouper les composants correspondant aux différentes phases de manière à réduire l'encombrement. L'encombrement de l'enceinte est à peine supérieur à celui du ou des bobinages secondaires. Pour la réalisation monophasée, le regroupement de plusieurs phases génère un encombrement légèrement supérieur à celui qui est généré par le regroupement de plusieurs phases dans la même enceinte selon la réalisation multiphasée.The intensity transformer according to the invention makes it possible to group the components corresponding to the different phases so as to reduce clutter. The size of the enclosure is barely greater than that of the secondary winding (s). For the single-phase realization, the grouping of several phases generates a slightly clutter greater than that generated by the combination of several phases in the same enclosure according to the multiphase embodiment.

La construction de ce transformateur d'intensité est en outre avantageuse du fait qu'une variation des dimensions du tube de support, du noyau magnétique et des bobinages secondaires n'entraíne pas des surcoûts importants.The construction of this current transformer is also advantageous from the causes a variation in the dimensions of the support tube, of the core magnetic and secondary windings does not entail additional costs important.

La construction est aisée et aboutit à un appareil robuste.The construction is easy and results in a robust device.

La présente invention n'est pas limitée à l'exemple de réalisation décrit, mais s'étend à toute variante ou modification évidente pour un homme du métier.The present invention is not limited to the embodiment described, but extends to any variant or modification obvious to a person skilled in the art.

Claims (12)

Transformateur d'intensité pour une installation de commutation monophasée ou multiphasée, à isolation gazeuse, comportant au moins un tube de support. sur lequel est monté au moins un bobinage secondaire contenant un noyau magnétique, ce tube étant traversé par un conducteur primaire, et connecté électriquement à ses extrémités, à deux plaques métalliques polygonales, disposées parallèlement, constituant des flasques de fermeture d'une enceinte contenant notamment ledit noyau magnétique et ledit bobinage secondaire, caractérisé en ce que le tube de support (11; 11a, 11b, 11c) est étanche aux gaz et s'emboíte à ses extrémités, de façon étanche, dans des évidements appropriés ménagés dans lesdits flasques de fermeture (20, 20a; 21, 21a) de l'enceinte (19; 19a), l'une des extrémités étant connectée audit flasque de fermeture correspondant (20; 20a) par un anneau intermédiaire (31) d'un matériau isolant, lesdits flasques de fermeture étant reliés entre eux par des tiges de liaison rigides (26; 26a) qui sont disposées dans les angles de ces flasques et qui sont électriquement connectés par leurs extrémités avec lesdits flasques de fermeture (20, 21).Current transformer for a switching installation single-phase or multi-phase, gas-insulated, comprising at least one support tube. on which at least one secondary winding is mounted containing a magnetic core, this tube being traversed by a conductor primary, and electrically connected at its ends, to two plates metallic polygons, arranged in parallel, constituting flanges of closing an enclosure containing in particular said magnetic core and said secondary winding, characterized in that the support tube (11; 11a, 11b, 11c) is gas tight and fits at its ends, in a leaktight manner, in suitable recesses in said closing flanges (20, 20a; 21, 21a) of the enclosure (19; 19a), one end being connected to said corresponding closing flange (20; 20a) by a ring intermediate (31) of an insulating material, said closure flanges being interconnected by rigid connecting rods (26; 26a) which are arranged in the corners of these flanges and which are electrically connected by their ends with said closing flanges (20, 21). Transformateur selon la revendication 1, caractérisé en ce que, pour une installation multiphasée, les flasques de fermeture (20a, 21a) sont communs à plusieurs noyaux magnétiques (12a, 12b, 12c; 13a, 13b, 13c; 14a, 14b, 14c) correspondant respectivement à plusieurs phases et comportant chacun plusieurs évidements agencés pour recevoir et loger de façon étanche une extrémité d'un tube de support d'un des noyaux magnétiques correspondant à une des phases.Transformer according to claim 1, characterized in that, for a multiphase installation, the closing flanges (20a, 21a) are common to several magnetic cores (12a, 12b, 12c; 13a, 13b, 13c; 14a, 14b, 14c) corresponding respectively to several phases and each comprising a plurality of recesses arranged to receive and sealably house a end of a support tube of one of the magnetic cores corresponding to one of the phases. Transformateur selon la revendication 2, caractérisé en ce que lesdits évidements sont disposés linéairement.Transformer according to claim 2, characterized in that said recesses are arranged linearly. Transformateur selon la revendication 1, caractérisé en ce que les tiges de liaison (26) sont liées par vissage avec lesdits flasques de fermeture. Transformer according to claim 1, characterized in that the rods link (26) are linked by screwing with said closing flanges. Transformateur selon la revendication 2, caractérisé en ce qu'il comporte en outre deux tiges de liaison (26b) disposées entre deux bobinages secondaires adjacents correspondant à deux des phases de l'installation.Transformer according to claim 2, characterized in that it comprises in addition to two connecting rods (26b) arranged between two secondary windings adjacent to two of the installation phases. Transformateur selon la revendication 1, caractérisé en ce que lesdits flasques de fermeture (20, 20a; 21, 21b) sont identiques.Transformer according to claim 1, characterized in that said closing flanges (20, 20a; 21, 21b) are identical. Transformateur selon la revendication 1, caractérisé en ce que le bobinage secondaire est rendu solidaire de l'un desdits flasques de fermeture au moyen d'au moins une sangle de serrage (18).Transformer according to claim 1, characterized in that the winding secondary is made integral with one of said closing flanges by means at least one tightening strap (18). Transformateur selon la revendication 7, caractérisé en ce que ledit flasque de fermeture (20) comporte au moins une protubérance (27, 28) et une ouverture (29, 30) ménagée dans cette protubérance pour permettre le passage de ladite bande de serrage (18).Transformer according to claim 7, characterized in that said flange closure (20) comprises at least one protuberance (27, 28) and a opening (29, 30) formed in this protuberance to allow the passage of said clamping band (18). Transformateur selon la revendication 1, caractérisé en ce que les tiges de liaison (26) sont de section transversale quadrangulaire.Transformer according to claim 1, characterized in that the rods link (26) are of quadrangular cross section. Transformateur selon la revendication 1, caractérisé en ce que ladite enceinte (19) comporte des parois latérales (22, 23, 24, 25) fixées auxdites tiges de liaison (26).Transformer according to claim 1, characterized in that said enclosure (19) has side walls (22, 23, 24, 25) fixed to said walls connecting rods (26). Transformateur selon la revendication 10, caractérisé en ce que lesdites parois latérales sont fixées aux tiges de liaison (26) au moyen de vis, et en ce que les vis sont disposées de façon asymétrique par rapport à l'axe longitudinal du transformateur (10).Transformer according to claim 10, characterized in that said side walls are fixed to the connecting rods (26) by means of screws, and in this that the screws are arranged asymmetrically to the longitudinal axis of the transformer (10). Transformateur selon la revendication 1, caractérisé en ce qu'il comporte une boíte de connexion (32) contenant des bornes de raccordement électriquement connectées auxdits bobinages secondaires.Transformer according to claim 1, characterized in that it comprises a connection box (32) containing connection terminals electrically connected to said secondary windings.
EP99400205A 1998-02-09 1999-01-29 Current transformer for a gas-insulated switch installation Expired - Lifetime EP0935264B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9801470A FR2774803B1 (en) 1998-02-09 1998-02-09 INTENSITY TRANSFORMER FOR A GAS INSULATED SWITCHING INSTALLATION
FR9801470 1998-02-09

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EP0935264A1 true EP0935264A1 (en) 1999-08-11
EP0935264B1 EP0935264B1 (en) 2004-05-12

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US (1) US6014072A (en)
EP (1) EP0935264B1 (en)
JP (1) JPH11317319A (en)
CN (1) CN1130737C (en)
AT (1) ATE266897T1 (en)
DE (1) DE69917092T2 (en)
ES (1) ES2221325T3 (en)
FR (1) FR2774803B1 (en)

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FR2874122B1 (en) 2004-08-06 2006-09-22 Areva T & D Ag THREE-PHASE TYPE CURRENT TRANSFORMER AND ELECTRICAL STATION EQUIPPED WITH SUCH A CURRENT TRANSFORMER
JP4703316B2 (en) * 2005-08-12 2011-06-15 株式会社東芝 Gas insulated current transformer
JP5243161B2 (en) * 2008-09-18 2013-07-24 日本板硝子株式会社 Image reading device
DE102010004971A1 (en) * 2010-01-18 2011-07-21 Abb Technology Ag Current transformer module for high or medium voltage switchgear, has cabinet with common gas space for receiving isolation gas of nominal guards and single phase region for locating current transformers
WO2011161129A1 (en) * 2010-06-23 2011-12-29 Abb Technology Ag Current transformer device
CA2783433C (en) * 2011-07-25 2020-12-15 William Kenneth Mcgrail Transformerinstrumentationandmeteringsystem
US8587399B2 (en) 2012-02-06 2013-11-19 Continental Control Systems, Llc Split-core current transformer
CN103346007A (en) * 2013-07-26 2013-10-09 常州博瑞电力自动化设备有限公司 Electronic current transformer of isolation circuit breaker
FR3016995B1 (en) * 2014-01-24 2017-10-13 Alstom Technology Ltd ASSEMBLING A FLANGE ON A TUBE FOR A TRANSFORMER
DE102015210135A1 (en) * 2015-06-02 2016-12-08 Siemens Aktiengesellschaft Current transformer and switchgear with a current transformer
EP3182427B1 (en) * 2015-12-18 2020-05-20 ABB Schweiz AG Current transformer for high voltage gas insulated switchgear substation
JP6416827B2 (en) * 2016-06-23 2018-10-31 ファナック株式会社 Reactor having a cylindrical core, motor drive device, and amplifier device
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ES2221325T3 (en) 2004-12-16
JPH11317319A (en) 1999-11-16
EP0935264B1 (en) 2004-05-12
DE69917092D1 (en) 2004-06-17
CN1227956A (en) 1999-09-08
US6014072A (en) 2000-01-11
FR2774803A1 (en) 1999-08-13
ATE266897T1 (en) 2004-05-15
CN1130737C (en) 2003-12-10
DE69917092T2 (en) 2005-05-12
FR2774803B1 (en) 2001-04-27

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