EP0651400B1 - Traversée avec supports d'électrode spéciaux en particulier pour haute tension - Google Patents

Traversée avec supports d'électrode spéciaux en particulier pour haute tension Download PDF

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Publication number
EP0651400B1
EP0651400B1 EP94113592A EP94113592A EP0651400B1 EP 0651400 B1 EP0651400 B1 EP 0651400B1 EP 94113592 A EP94113592 A EP 94113592A EP 94113592 A EP94113592 A EP 94113592A EP 0651400 B1 EP0651400 B1 EP 0651400B1
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EP
European Patent Office
Prior art keywords
control electrode
bushing
field
insulating
bushing according
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.)
Expired - Lifetime
Application number
EP94113592A
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German (de)
English (en)
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EP0651400A1 (fr
Inventor
Peter Rost
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.)
KGRITZ MESSWANDLER GMBH & CO.
Original Assignee
Ritz Messwandler GmbH and Co KG
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Priority claimed from EP93117563A external-priority patent/EP0600233A1/fr
Application filed by Ritz Messwandler GmbH and Co KG filed Critical Ritz Messwandler GmbH and Co KG
Priority to EP94113592A priority Critical patent/EP0651400B1/fr
Publication of EP0651400A1 publication Critical patent/EP0651400A1/fr
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Classifications

    • 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
    • H01B17/28—Capacitor type

Definitions

  • the invention relates to a bushing, in particular for high voltages, for connecting a gas-insulated electrical device with a connection point lying in atmospheric air, with a union insulator, with at least one field control electrode arranged coaxially around at least one bushing conductor on the bushing carrying the potential-carrying area (on the potential side ) facing end of the feed-through conductor, and an insulating tube assigned to each field control electrode and arranged coaxially to the feed-through conductor for holding the field control electrode.
  • the at least one field control electrode is formed by conductive sections on at least one insulating tube on an end facing the potential-carrying area of the bushing, the at least one insulating tube being arranged coaxially around at least one bushing conductor and by a holder on its earth potential-side end outside the one with a high field strength loaded area is held on one side.
  • the invention was therefore based on the object of further improving the electrical strength of the implementation mentioned at the outset while maintaining the advantages already achieved.
  • the at least one field control electrode is designed as a tube and the associated insulating tube connects to the end of the field control electrode facing away from the electrical device and is connected to the latter via a preferably conductive clamping element.
  • this clamping element which fixes both the end region of the field control electrode and the start region of the insulating tube, it is possible, in cooperation with the insulating tube, for the To clamp the field control electrode concentrically with respect to the feed-through conductor at a particularly low cost.
  • This in turn is a reason for increasing the dielectric strength of the bushing according to the invention, since deviations from the ideally concentric position can lead to a one-sided shortening of the insulation distance and thus to flashovers.
  • Another advantage results from a precise joining of the clamping element and the field control electrode (tube) with an exact fit at the joint between these parts, so that the coaxial cylinder field between the lead-through conductor and the field control electrode remains largely unaffected by the joint.
  • An advantageous embodiment of the invention consists in producing the clamping element and the field control electrode preferably from aluminum; other materials are also possible.
  • the clamping element can also be designed as a bead-shaped termination of the field control electrode.
  • the clamping element has a multiple function. On the one hand, it serves for the mechanical connection of the field control electrode to the insulating tube and for the concentric fixing of the field control electrode; on the other hand, due to its bead-like design, the field profile at the end of the field control electrode is influenced favorably and in the desired manner.
  • the diameter of the insulating tube is preferably larger than the diameter of the associated field control electrode.
  • the insulating tube can overlap an end region of the field control electrode.
  • the clamping element can have an inner electrode ring lying between the insulating tube and the field control electrode, and an outer electrode ring which clamps the end region of the insulating tube from the outside and clamps.
  • the outer electrode ring has a preferably slotted outer clamping ring.
  • the at least one insulating tube is held by at least one insulating disk arranged in the region of its end facing the connection point.
  • the insulating washers can be attached coaxially to a support tube surrounding the lead-through conductor or conductors.
  • the bushing preferably has a first, outer and a second inner field control electrode arranged coaxially thereto, each with a first outer and a second inner insulating tube.
  • the end of the second field control electrode facing the electrical device can be displaced relative to the same end of the first field control electrode in the direction of the connection point of the bushing. Furthermore, the end of the second inner insulating tube facing the connection point can lie within the first insulating tube. Alternatively, the first and the second insulating tube can also have a common end on the connection point side.
  • the insulating washers can each have a conical fastening ring resting on the support tube Be fixed in the axial direction, wherein the ring engages in a recess of the respective insulating washer.
  • the field control electrodes are preferably bulged at their ends to avoid impermissibly high field strength peaks. Furthermore, the gas contained in the bushing can be under increased pressure.
  • the implementation according to the invention can finally be used in current, voltage or combination converters.
  • Figure 1 shows a transducer 1, the upper housing head 2 with cover 3 is designed as a cast aluminum housing and which has the potential of a current conductor 4 during operation.
  • the current conductor 4 is enclosed in the interior of the housing head 2 by the core of the transducer 1 with a core shield 11.
  • a current-carrying connection is created by means of the bushing according to the invention to an external location lying in atmospheric air, ie to a junction box 5 which is mounted on a base 9 lying at earth potential.
  • the potential difference between the housing head 2 and the base 9 lying at earth potential is bridged by a coupling insulator 6, which together with the housing head 2, the housing cover 3 and the base 9 forms a gas-tight space, which is preferably filled with sulfur hexafluoride (SF 6 ) as the insulating gas is and can also be under pressure to increase the insulation effect.
  • the lead-through lead (s) is / are surrounded by a support tube 7.
  • the housing head 2 is continued down into the region of the union insulator 6 with a high-voltage electrode 20 which has a bead-shaped end 22.
  • a first field control electrode 23 is arranged coaxially with the high-voltage electrode 20 as well as the support tube 7 and the union insulator 6, the upper end 21 of which is formed in a bead shape in order to avoid local increases in field strength.
  • the first field control electrode 23 represents an aluminum tube, the lower end of which is formed by a first clamping element 24. This clamping element also ensures that the field control electrode 23 is mounted concentrically with the support tube 7 and the union insulator 6 with great accuracy.
  • a first insulating tube 25 connects to the lower (earth potential-side) end of the first field control electrode 23.
  • This insulating tube preferably has a slightly larger diameter than the first field control electrode 23 and overlaps it in a transition region.
  • the diameter of the insulating tube 25 can, however, also be smaller or the same size as that of the field control electrode 23.
  • the insulating tube 25 is also held on the support tube 7 by means of two first insulating washers 14, 14 ′ in the region of its end on the earth potential side.
  • the distance between the two first insulating disks 14, 14 ', which are firmly connected to the insulating tube 25, results in a mechanically large clamping length, which results in a correspondingly robust mounting of this tube.
  • the insulating washers are axially fixed on the support tube 7 by conical fastening rings 12 which engage in corresponding recesses in the insulating washers.
  • the support tube 7 is fixed on the earth potential side to the base 9 with a fastening part 8. Openings 15 are provided in the first insulating washers 14, 14 ' allow easier drying and impregnation of the space between the insulating washers.
  • FIG. 2 shows a second embodiment of the invention.
  • the feedthrough according to FIG. 2 additionally has a second inner field control electrode 33, the upper end 31 of which is displaced relative to the upper end 21 of the first field control electrode 23 in the direction of the earth potential side, that is to say it lies within the first field control electrode 23.
  • the lower end of this second field control electrode 33 is closed with a second clamping element 34.
  • this second clamping element 34 also serves to fasten the upper end of a second insulating tube 35, which connects to the second field control electrode 33 in the direction of the earth potential-side end of the bushing.
  • the second field control electrode 33 is also designed as an aluminum tube.
  • the second insulating tube 35 ends within the first insulating tube 25, so it is considerably shorter than this.
  • Second insulating washers 16, 16 'in the region of the end of the second insulating tube 35 on the earth potential side serve in a similar manner, as shown in FIG. 1, for coaxially fastening the second insulating tube to the support tube 7.
  • the second insulating washers 16, 16' are on the support tube 7 in axial direction also defined by conical fastening rings 12 which engage in corresponding recesses in the second insulating washers.
  • the inner, second insulating tube 35 extends in the axial direction up to the lower end of the first insulating tube 25.
  • the first insulating washers 14, 14 ' serve as common holders for both insulating tubes, the conical fastening rings 12 in turn serving to axially fix the insulating washers.
  • Figure 4 shows a fourth embodiment of the invention. It is a voltage converter, while current transformers are shown in FIGS. 1 to 3.
  • a support tube 7 is provided, which contains one or more lead-through conductors.
  • the housing head 2 is at ground potential, while the support tube 7 and connection plate 36 are live in this implementation.
  • a ground potential electrode 40 with a bead-shaped end 42 connects to the housing head.
  • the first field control electrode 23, to which the first insulating tube 25 is connected, is provided at the end of the support tube 7 facing the earth potential-side region of the bushing. These two parts are each arranged coaxially to the support tube 7 and the union insulator 6.
  • the diameter of the insulating tube 25 is slightly larger than the diameter of the field control electrode 23.
  • other diameter ratios are also possible here.
  • a Clamping element 24 which has the same functions as in the embodiments of FIGS. 1, 2 and 3.
  • the structure also essentially corresponds to that shown in FIG. 1, the end of this bushing on the high-voltage potential being terminated with an end plate 36.
  • a plurality of field control electrodes arranged coaxially to one another can be provided, each of which is connected to an insulating tube.
  • FIGS. 5a and 5b finally show detailed representations of the clamping element 24, 34 in the transition area between the field control electrode and the insulating tube.
  • the clamping element essentially consists of an inner electrode ring 242 and an outer electrode ring 241.
  • the inner electrode ring 242 lies between a field control electrode 23, 33 and the associated insulating tube 25, 35, while the outer electrode ring 241 surrounds the insulating tube 25, 35 from the outside.
  • the clamping element 24, 34 is used both for mechanical mounting and coaxial fixing of the field control electrode 23, 33 with respect to the support tube 7 by means of the insulating tube 25, 35 fastened coaxially to the support tube with insulating disks, and also as an electrical termination of the field control electrode with which to avoid field strength peaks and voltage flashovers a desired field profile is achieved.
  • the radii of both the inner and the outer electrode ring are selected in a suitable manner.
  • the reference number 37 designates the joint between the field control electrode 23, 33 and the inner electrode ring 242.
  • the outer electrode ring 241 can furthermore be formed in two parts, an outer, preferably slotted clamping ring serving to improve the mechanical fixation.
  • the end of the inner and outer electrode ring facing away from the field control electrode is recessed or hollowed out in the area adjacent to the insulating tube in FIG. 5b.
  • the illustrated embodiments of the invention are particularly suitable for voltage ranges between approximately 250 and 400 kV.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electron Tubes For Measurement (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Claims (18)

  1. Traversée pour relier un appareil électrique isolé par du gaz à un point de branchement situé à l'air atmosphérique, comprenant un isolateur extérieur, au moins une électrode de commande de champ (23, 33) entourant coaxialement un conducteur de passage, à l'extrémité du conducteur de passage tournée vers l'appareil électrique ainsi qu'un tube isolant (25, 35) associés à chaque électrode de commande de champ (23, 33), coaxialement au conducteur de passage, pour la fixation de l'électrode de commande de champ,
    caractérisée en ce que
    au moins une électrode de commande de champ (23, 33) est en forme de tube et le tube isolant (25, 35) correspondant fait suite à l'extrémité de l'électrode de commande de champ (23, 33) opposée à l'appareil électrique, et est reliée à celle-ci de préférence par un élément de serrage conducteur (24, 34).
  2. Traversée selon la revendication 1,
    caractérisée en ce que
    au moins une électrode de commande de champ (23, 33) et au moins un élément de serrage (24, 34) sont fabriqués en aluminium.
  3. Traversée selon la revendication 1 ou 2,
    caractérisée en ce que
    au moins un élément de serrage (24, 34) forme une extrémité en bourrelet pour l'électrode de commande de champ (23, 33).
  4. Traversée selon l'une des revendications précédentes,
    caractérisée en ce que
    elle est remplie de gaz de préférence d'hexafluorure de soufre (SF6).
  5. Traversée selon l'une des revendications précédentes,
    caractérisée en ce que
    le diamètre d'au moins un tube isolant (25, 35) est supérieur au diamètre de l'électrode de commande de champ (23, 33) correspondante.
  6. Traversée selon l'une des revendications précédentes,
    caractérisée en ce que
    le tube isolant (25, 35) chevauche une zone d'extrémité de l'électrode de commande de champ correspondante (23, 33).
  7. Traversée selon l'une des revendications précédentes,
    caractérisée en ce que
    l'élément de serrage (24, 34) comporte une bague d'électrode extérieure (241) et une bague d'électrode intérieure (242), la bague intérieure (242) étant prévue entre l'électrode de commande de champ (23, 33) et le tube isolant (25, 35) alors que la bague extérieure (241) entoure le tube isolant (25, 35).
  8. Traversée selon la revendication 7,
    caractérisée en ce que
    la bague d'électrode extérieure (241) comporte une bague de serrage extérieure de préférence fendue.
  9. Traversée selon l'une des revendications précédentes,
    caractérisée en ce que
    au moins un tube isolant (25, 35) est maintenu par au moins une rondelle isolante (14, 14' ; 16, 16') au niveau de l'extrémité du tube isolant (25, 35) tournée vers le point de branchement.
  10. Traversée selon la revendication 9,
    caractérisée en ce que
    les rondelles isolantes (14, 14' ; 16, 16') sont fixées coaxialement à au moins un tube de support (7) entourant un conducteur de passage.
  11. Traversée selon l'une des revendications précédentes,
    caractérisée par
    une première électrode de champ, extérieure (23) et une seconde électrode de champ (33), intérieure, coaxiale à la première, avec chaque fois un premier tube extérieur (25) et un second tube intérieur (35).
  12. Traversée selon la revendication 11;
    caractérisée en ce que
    l'extrémité (31) de la seconde électrode de commande de champ (33) tournée vers l'appareil électrique est décalée par rapport à l'extrémité correspondante (21) de la première électrode de commande de champ (23) en direction du point de branchement de la traversée.
  13. Traversée selon la revendication 12,
    caractérisée en ce que
    l'extrémité du côté du point de branchement du second tube isolant (35) extérieur est décalée par rapport à l'extrémité du premier tube isolant (25) en direction de l'extrémité de la traversée tournée vers l'appareil électrique.
  14. Traversée selon la revendication 11 ou 12,
    caractérisée en ce que
    le premier et le second tube isolant (25, 35) ont une extrémité tournée vers le point de branchement.
  15. Traversée selon l'une des revendications 9 à 14,
    caractérisée en ce que
    les rondelles isolantes (14, 14' ; 16, 16') sont bloquées dans la direction axiale chaque fois par une bague de fixation (12), conique portée par le tube de support (7), et chaque bague de fixation (12) pénètre dans une cavité d'une rondelle isolante (14, 14' ; 16, 16').
  16. Traversée selon l'une des revendications précédentes,
    caractérisée en ce que
    elle est remplie d'un gaz sous pression élevée.
  17. Transformateur d'intensité ou transformateur combiné avec une traversée selon l'une des revendications précédentes,
    caractérisé en ce que
    l'électrode de commande de champ (23, 33) est prévue à l'extrémité du côté de la haute tension d'au moins un conducteur traversant et le tube isolant (25, 35) correspondant fait suite à la zone mise à la masse de l'extrémité de l'électrode de commande de champ (23, 33) tournée vers la traversée.
  18. Transformateur de tension muni d'une traversée selon l'une des revendications 1 à 16,
    caractérisé en ce que
    l'électrode de commande de champ (23, 33) est prévue à l'extrémité d'au moins un conducteur traversant du côté de la masse et le tube isolant (25, 35) associé fait suite à l'extrémité de l'électrode de commande de champ (23, 33) tournée vers la zone de la traversée conduisant le potentiel.
EP94113592A 1993-10-29 1994-08-31 Traversée avec supports d'électrode spéciaux en particulier pour haute tension Expired - Lifetime EP0651400B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94113592A EP0651400B1 (fr) 1993-10-29 1994-08-31 Traversée avec supports d'électrode spéciaux en particulier pour haute tension

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP93117563 1993-10-29
EP93117563A EP0600233A1 (fr) 1992-11-30 1993-10-29 Traversé avec supports d'électrode spéciaux en particulier pour haute tension
EP94113592A EP0651400B1 (fr) 1993-10-29 1994-08-31 Traversée avec supports d'électrode spéciaux en particulier pour haute tension

Publications (2)

Publication Number Publication Date
EP0651400A1 EP0651400A1 (fr) 1995-05-03
EP0651400B1 true EP0651400B1 (fr) 1997-04-09

Family

ID=8213380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113592A Expired - Lifetime EP0651400B1 (fr) 1993-10-29 1994-08-31 Traversée avec supports d'électrode spéciaux en particulier pour haute tension

Country Status (4)

Country Link
EP (1) EP0651400B1 (fr)
AT (1) ATE151560T1 (fr)
DE (1) DE59402363D1 (fr)
ES (1) ES2100609T3 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207463B (de) * 1962-11-26 1965-12-23 Bbc Brown Boveri & Cie Gasdichte, elektrische Durchfuehrung mit Druck-gasfuellung und Steuerelektroden
US4296274A (en) * 1980-07-11 1981-10-20 The United States Of America As Represented By The United States Department Of Energy High voltage bushing having weathershed and surrounding stress relief collar
DE4240118C1 (de) * 1992-11-30 1994-03-31 Ritz Messwandler Kg Durchführung, insbesondere für hohe Spannungen mit spezieller Elektrodenhalterung

Also Published As

Publication number Publication date
EP0651400A1 (fr) 1995-05-03
ES2100609T3 (es) 1997-06-16
DE59402363D1 (de) 1997-05-15
ATE151560T1 (de) 1997-04-15

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