EP1577904B1 - Traversée haute tension avec élément pour les contrôle du champ électrique - Google Patents

Traversée haute tension avec élément pour les contrôle du champ électrique Download PDF

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Publication number
EP1577904B1
EP1577904B1 EP04405151A EP04405151A EP1577904B1 EP 1577904 B1 EP1577904 B1 EP 1577904B1 EP 04405151 A EP04405151 A EP 04405151A EP 04405151 A EP04405151 A EP 04405151A EP 1577904 B1 EP1577904 B1 EP 1577904B1
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EP
European Patent Office
Prior art keywords
field control
bushing
control element
field
mounting flange
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
EP04405151A
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German (de)
English (en)
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EP1577904A1 (fr
Inventor
Lise Donzel
Felix Greuter
Hansjoerg Gramespacher
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ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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Application filed by ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Priority to AT04405151T priority Critical patent/ATE546818T1/de
Priority to EP04405151A priority patent/EP1577904B1/fr
Priority to US11/079,858 priority patent/US7262367B2/en
Publication of EP1577904A1 publication Critical patent/EP1577904A1/fr
Application granted granted Critical
Publication of EP1577904B1 publication Critical patent/EP1577904B1/fr
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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
    • H01B17/28—Capacitor type
    • 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
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges

Definitions

  • the invention relates to the field of high or medium voltage technology, in particular electrical insulation and connection technology for grounded high voltage apparatus. It is based on a dielectric bushing and a high-voltage electrical apparatus according to the preamble of the independent claims.
  • a high voltage insulator z As porcelain or composite material with a coating of field control material (FGM) disclosed.
  • the field-controlling coating consists of varistor powder, z. Of doped zinc oxide (ZnO) embedded in a polymer matrix.
  • the FGM coating serves to compare the field distribution on the insulator surface and is distributed so that part of the material is in electrical contact with both the ground electrode and the high voltage electrode. In this case, the FGM coating can only partially cover the insulator length and be concentrated in the field-loaded electrode regions.
  • the FGM coating can be applied to the insulator surface, can be incorporated there in a shield or can be shielded by a weatherproof, electrically insulating protective layer to the outside.
  • An equalization of the capacitive field load can be realized by alternating horizontal strips or bands of FGM coating and insulator material.
  • the FGM coating may be applied in the form of a glaze or a paint, or mixed into a slurry or clay, applied to the porcelain insulator and fired there to a glaze or ceramic layer.
  • the matrix for the FGM coating may be a polymer, an adhesive, a casting or a mastic or a gel.
  • EP 1 042 756 discloses a glass fiber reinforced insulator tube which is impregnated on the inner surface and optionally also the outer surface with a resin which has a particulate filler with varistor properties, in particular zinc oxide.
  • the GRP tube can be made by winding a fiberglass mesh which is impregnated with the varistor-filled resin at least on the outer layers.
  • the insulator comprises an insulator body made of porcelain or composite material and a porcelain or silicone shield.
  • the shield has a variable insulator screen density.
  • Isolatorend Scheme For field relief in a Isolatorend Scheme turn the known shield electrode between the insulator body and conductor is present. It is now proposed to install an increased number of insulator screens in the heavily field-loaded area where the shielding electrode ends. Due to the increased insulator screen density, improved field relief is achieved in the end region of the shield electrode.
  • the invention relates to a prior art, as shown in the US Pat. 3,318,995 is known.
  • cast resin bushings are disclosed, which remain electrically reliable even with differential thermal expansion or shrinkage due to cavitation between metal and cast resin.
  • regions with increased cracking tendency are electrically shielded by partially conductive or semiconductive field shielding layers.
  • the layers are either arranged on the high-voltage inner conductor and electrically connected to this end; or they are arranged on shielding electrodes and electrically connected to these end, wherein the shielding electrodes in turn are electrically connected to the grounded housing of the connected apparatus.
  • the field shielding layers create a field-free space between themselves and the inner conductor or themselves and the shielding electrode and effectively shield cavities in the casting resin.
  • the object of the present invention is to provide an improved dielectric bushing and a high-voltage electrical apparatus and an electrical switchgear with such a procedure. This object is achieved according to the invention by the features of the independent claim.
  • the invention consists in a dielectric bushing, in particular a high voltage feedthrough for a high voltage electrical apparatus, comprising an insulator part with a first mounting flange and a second mounting flange for mounting the bushing, wherein within the bushing in a field loading zone in the region of the first mounting flange one for a desired voltage level required Shield electrode is omitted and instead for the purpose of field control in the field loading zone, a non-linear electrical and / or dielectric field control element on the insulator part in the region of the first mounting flange is present and the field control element is in electrical contact with the first mounting flange.
  • the bushings can therefore be built shorter.
  • the E-field is no longer concentrated in the region of the shielding electrode during the entire pulse duration, but can propagate as a wave along the field control element and thereby degrade.
  • the maximum field strengths are reduced.
  • the field control material with respect to its non-linear electrical and / or dielectric properties, its geometric shape and its arrangement on the insulator part for dielectric relief of field loading zone without shielding electrode for all operating conditions, especially for surge voltages designed.
  • the field control element can thus master even the most critical field loading conditions without shielding electrode or shielding electrodes.
  • design criteria for geometrical design of the field control element are specified by which an advantageous field control can be achieved with little material.
  • a minimum required length of the field control element can be determined along the longitudinal extent of the insulator part according to claim 5. It is thereby achieved that the field load propagates as a traveling wave along the field control element, in particular in the case of surge voltage, and thereby degrades to such an extent that no damaging field strengths can form on reaching the remote end of the field control material.
  • Claim 6 indicates how can be built with the field control element DC feedthroughs in a simple manner.
  • the embodiment according to claim 7 has the advantage that in particular the highest field loads in the region of the earth flange with the field control material can be controlled.
  • the embodiments according to claim 8 and 9 have the advantage that both flange regions are protected by the field control materials independently of each other from flashovers or partial discharges.
  • Claim 10 feature a) indicates various radial positions for the arrangement of the field control material on the insulator part.
  • Claim 10 feature b) has the advantage that a conventional GRP pipe (glass fiber reinforced plastic) or a conventional porcelain insulator by a self-supporting FGM pipe (field control material tube) is replaceable.
  • Claim 11 specifies advantageous material components for the field control element.
  • Claims 12 and 13 relate to a high-voltage electrical apparatus and an electrical switchgear comprising an inventive implementation with the above-mentioned advantages.
  • Fig. 1a shows a conventional gas-insulated dielectric bushing 1, in particular a high voltage bushing 1 for a high voltage electrical apparatus.
  • the bushing 1 comprises an insulator part 2; 2a, 2b with a first ground-side mounting flange 4 for mounting the bushing 1 on a grounded housing 5 of an electrical apparatus (not shown) and a second voltage-side mounting flange 8 for mounting the bushing 1 to a high voltage part (not shown).
  • the insulator part 2; 2a, 2b has a gas space 20 for an insulating gas 20 in the interior.
  • the gas space 20 contains a dielectrically insulating gas 20, e.g. As air, compressed air, nitrogen, SF 6 or similar gas.
  • the gas-insulated bushing 1 is thus hollow, typically hollow cylindrical, with an axis 3a, for receiving an electrical part 3 or at least one electrical conductor 3 in the gas space 20.
  • the bushing 1 is usually used to connect the encapsulated electrical apparatus to ground potential 5 at High or medium voltage network.
  • an internal shielding electrode 6, 6a is necessarily present in order to achieve field relief in the field-loaded zone 7, 7a at the lower ground flange 4 and to reduce or avoid partial discharges and flashovers.
  • the shielding electrode 6, 6a is typically in electrical contact 46 with the ground flange 4. It protrudes into the gas space 20 and tapers generally conically upwards.
  • Fig. 1b shows an example of a solid-state implementation 1 according to the prior art.
  • the insulator part 2, 2b is designed as a resin body 2 filled in its entirety with an optional shield 2b.
  • the insulator part 2, 2b thus has an insulation space for a solid insulating material 20 in the interior.
  • 3b and 3c denote the power connections.
  • the insulator part 2, 2b surrounds the current conductor 3.
  • a shielding electrode 6, 6a in the field loading zone 7, 7a on the earth flange 4 is present and is electrically conductively connected thereto via a contact 46.
  • Fig. 2a-2d and Fig. 3a-3b show exemplary embodiments of a gas-insulated or solid-insulated or otherwise insulated dielectric bushing 1 ', in accordance with the invention at least one shielding electrode 6; 6a, 6b has been omitted without sacrificing dielectric strength or reliability.
  • the shielding electrode 6; 6a, 6b is namely for the purpose of field control in the field loading zone 7; 7a, 7b a nonlinear electrical and / or dielectric field control element 9; 9a, 9b; 9i, 9o; 9s on the insulator part 2; 2a, 2b; 2c in the region of the first mounting flange 4 available.
  • the field control element 9; 9a, 9b; 9i, 9o; 9s is used instead of the earlier in the insulator part 2; 2a, 2b; 2c arranged shielding electrode 6; 6a, 6b for the dielectric discharge of the field loading zone 7; 7a, 7b.
  • the field control element 9; 9a, 9b; 9i, 9o; 9s is used instead of the earlier in the insulator part 2; 2a, 2b; 2c arranged shielding electrode 6; 6a, 6b for the dielectric discharge of the field loading zone 7; 7a, 7b.
  • the field control element 9 is designed for the purpose of relieving the field loading zone 7 in such a way that the flange region 7 is stress-relieved.
  • the field control element 9 in an intermediate layer 22 between the GRP pipe (glass fiber reinforced plastic and in particular epoxy tube) 2a and the silicone shield 2b in the form of a cylinder jacket-shaped coating 9 is arranged.
  • the field control element 9 may be replaced by any known manufacturing or processing process, e.g. B. casting, spraying, winding, extrusion o. ⁇ ., Be applied to the outside of the GRP pipe 2 a.
  • the field control element 9; 9a, 9b; 9i, 9o; 9s on: nonlinear electrical varistor characteristics and in particular a critical field strength, the varistor switching behavior of the field control element 9; 9a, 9b; 9i, 9o; 9s characterized; and / or a high dielectric constant ⁇ , in particular ⁇ > 30, preferably ⁇ > 40 and particularly preferably ⁇ > 50.
  • the field control element 9 is in electrical contact with the first mounting flange 4 and extends over a predeterminable length l along a longitudinal extension x of the insulator part 2; 2a, 2b. It has a predeterminable thickness d or thickness distribution d (l) as a function of the length l. Preferably, its length l is greater than or equal to a ratio of a maximum test voltage to be tested, in particular a lightning impulse, to the critical electric field strength. This design consideration applies with advantage for all embodiments where the shielding electrode 6a in the Erdflansch Scheme 7a by the field control element 9; 9a; 9i, 9o is replaced.
  • Fig. 2b is the field control material 9, 9i disposed on an inner side 21 of the GRP pipe 2a and can additionally help to reduce surface charges there.
  • the length l 1 is chosen here by way of example so that the field control layer 9, 9i is not in electrical contact with the counter flange 8.
  • Fig. 2c can in addition to the field control 9; 9a another field control element 9; 9b, which likewise has suitable nonlinear electrical and / or dielectric properties, in particular those as previously described for the field control element 9; 9a, and in addition in a field loading zone 7, 7b in the region of the second mounting flange 8 over a predetermined length l; l 2 and thickness d or d (l 2 ) on the insulator part 2; 2a, 2b is present.
  • the further field control element 9 is used; 9b as a replacement for a shielding electrode 6b in the region of the second, here the upper, mounting flange 8.
  • the field control element 9; 9a including the further field control element 9; 9b is selected in the intermediate layer 22.
  • the further field control element 9; 9b in electrical contact with the second mounting flange 8 and / or is the further field control element 9; 9b by a field control material-free zone extending along the longitudinal extent of the insulator part 2; 2a, 2b extends from the field control element 9; 9a separated in the region of the first mounting flange 4.
  • a first field control element 9; 9o in the intermediate layer 22 between the GRP pipe 2a and shield 2b and a second field control element 9, 9i on the inner side 21 of the GRP pipe 2a in the Erdflansch Scheme 7a be present.
  • the first integrated and the second internal field control element 9o, 9i can be made of the same or other field control material and in particular varistor material.
  • the associated thicknesses d o , d i and lengths l o , l i can be designed individually. By way of example, d i > d o and l i ⁇ l o are selected.
  • Fig. 3a and Fig. 3b show an insulator part 2, 2c of a porcelain hollow insulator 2c, which is equipped on the inner side 21 with the field control layer 9, 9i.
  • a field control material coating 9o, z. B. in disjoint horizontal Strip 9o preferably between insulator screens 2c and in particular in the lower Erdflansch Scheme 7a, be present.
  • the field control material 9; 9a, 9b; 9i, 9o be present in a coating or solid shape on an inner side 21 and / or integrated in an intermediate layer 22 between components 2a, 2b of the insulator part 2; 2a, 2b and / or on an outer side 23 of the insulator part 2; 2a, 2b; 2c is arranged.
  • Fig. 4 takes over the field control material 9; 9s a mechanically supporting function.
  • the field control material 9; 9s in the insulator part 2; 2b the exclusive mechanical self-supporting function, so that a conventional self-supporting plastic pipe 2a can be omitted.
  • Such a field control material insulator tube 2; 2b including 9s is particularly simple in construction and very thin in diameter.
  • Fig. 3a and Fig. 4 on the insulator part 2; 2a, 2b; 2c over the entire surface and along a longitudinal extension x of the insulator part 2; 2a, 2b; 2c continuously and both with the first mounting flange 4; 8 as well as with the second mounting flange 8; 4 are in electrical contact.
  • a preferred choice of material for the field control materials 9; 9a, 9b; 9i, 9o; 9s comprises a matrix filled with microvaristor particles and / or high dielectric constant particles.
  • Suitable microvaristor particles are, for example, doped ZnO particles, TiO 2 particles or SnO 2 particles. High dielectric constant have z.
  • the matrix is chosen application-specific and can, for. Example, an epoxy, silicone, EPDM, thermoplastic, thermoplastic elastomer or glass.
  • the filling of the matrix with microvaristor particles may be, for example, between 20% by volume and 60% by volume.
  • Fig. 5 12 shows calculations of the E field distribution E (x) normalized to a maximum E field E 0 as a function of the longitudinal coordinate x of the insulator part 2 and the time represented by successive snapshots a, b, c for a conventional feedthrough 1 with shielding electrode 6 according to Fig. 1 and D, E, F, G for an inventive implementation 1 '.
  • the calculations were made for a SF 6 170 kV bushing with GRP pipe 2a and silicone shield 2b according to conventional structure 1 or inventive construction 1 '.
  • Fig. 5 12 shows calculations of the E field distribution E (x) normalized to a maximum E field E 0 as a function of the longitudinal coordinate x of the insulator part 2 and the time represented by successive snapshots a, b, c for a conventional feedthrough 1 with shielding electrode 6 according to Fig. 1 and D, E, F, G for an inventive implementation 1 '.
  • the calculations were made for a SF 6 170 kV bushing with GRP
  • the electric field strength E (x) at the silicon - air interface is shown during or shortly after the application of a lightning impulse with time delays of 0.5 ⁇ s / 2.2 ⁇ s / 20 ⁇ s for the curves a, b, c and 0.5 ⁇ s / 1.0 ⁇ s / 5 ⁇ s / 20 ⁇ s for the curves D, E, F, G. It can be clearly seen that the new design of the bushing 1 'avoids the E-field peaks and at any time produces a more homogeneous electric field. Field distribution is achieved. In addition, the areas of increased field strength are no longer stationary, which has an advantageous effect on the dielectric behavior of the bushing 1 '. With the help of the field calculations and the nonlinear electrical and / or dielectric properties of the field control element 9; 9a, 9b; 9i, 9o; 9s, the field control design of the implementation 1 'can be optimized.
  • Fig. 6 shows an insufficient design, wherein the field control element 9; 9a, 9b; 9i, 9o; 9s has too high electrical conductivity or the length l; l 1 , l 2 is too short.
  • the E-field propagates along the field control layer 9; 9a, 9b; 9i, 9o; 9s, but is not degraded, so that at the end of the field control layer 9; 9a, 9b; 9i, 9o; 9s nevertheless again a field exaggeration occurs, the partial discharges, rollovers or punches.
  • too low electrical conductivity of the field control material 9; 9a, 9b; 9i, 9o; 9s the E-field can not be effectively controlled or controlled.
  • the simple but effective rule can be stated that the field control element length l; l 1 , l 2 is greater than or equal to choose a ratio of a surge voltage to the critical electric field strength, the varistor switching behavior of the field control element 9; 9a, 9b; 9i, 9o; 9s characterized.
  • a high-voltage electrical apparatus in particular a disconnector, outdoor circuit breaker, vacuum switch, dead tank breaker, current transformer, voltage transformer, transformer, power capacitor or cable termination or in an electrical switchgear for high - or medium voltage.
  • the invention also relates to a high-voltage electrical apparatus, in particular a disconnector, outdoor circuit breaker, dead tank breaker, current transformer, voltage transformer, transformer, power capacitor or cable termination, in which a dielectric feedthrough 1 'is present as described above.
  • an electrical switchgear in particular a high or medium voltage switchgear comprising such a high voltage electrical apparatus claimed.

Claims (13)

  1. Traversée diélectrique (1'), en particulier traversée à haute tension (1') pour appareil électrique à haute tension, comprenant une partie isolante (2; 2a, 2b; 2c) dotée d'une première bride de montage (4) et d'une deuxième bride de montage (8) permettant de monter le passage (1'),
    caractérisé en ce que
    a) une électrode de blindage (6; 6a, 6b), nécessaire pour un niveau de tension souhaité, est supprimée à l'intérieur du passage (1'), dans une zone (7; 7a, 7b) sollicitée par le champ et située au niveau de la première bride de montage (4; 8),
    b) au lieu de cette électrode de blindage, pour contrôler le champ dans la zone (7; 7a, 7b) sollicitée par le champ, un élément électriquement linéaire et/ou un élément diélectrique (9; 9a, 9b; 9i, 9o; 9s) sont prévus sur la partie isolante (2; 2a, 2b; 2c) au niveau de la première bride de montage (4) et
    c) l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ est en contact électrique avec la première bride de montage (4).
  2. Passage (1') selon la revendication 1, caractérisé en ce que les propriétés électriques non linéaires et/ou les propriétés diélectriques, la configuration géométrique et l'agencement sur la partie isolante (2; 2a, 2b; 2c) de l'élément (9; 9a, 9b; 9i, 9o; 9s) de commande du champ sont conçus pour délester diélectriquement la zone (7; 7a, 7b) sollicitée par le champ et ce sans électrode de blindage (6; 6a, 6b) pour tous les états de fonctionnement et en particulier pour les pics de tension.
  3. Passage (1') selon l'une des revendications précédentes, caractérisé en ce que l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ présente :
    a) les propriétés électriques non linéaires d'un varistor et en particulier une intensité critique de champ qui caractérise un comportement de commutation de varistor de l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ et/ou
    b) une haute constante diélectrique ε, en particulier ε > 30, de préférence ε > 40 et de façon particulièrement préférable ε > 50.
  4. Passage (1') selon l'une des revendications précédentes, caractérisé en ce que l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ s'étend sur une longueur prédéterminée (l; l1, l2) sur l'extension longitudinale (x) de la partie isolante (2; 2a, 2b; 2c) et présente une épaisseur prédéterminée (d) ou une répartition d'épaisseur (d(l)) qui est fonction de la longueur (l; l1, l2).
  5. Passage (1') selon la revendication 3, caractéristique a et la revendication 4, caractérisé en ce que la longueur (1; l1, l2) est supérieure ou égale au rapport entre le pic de tension maximum à tester et l'intensité électrique critique.
  6. Passage (1') selon la revendication 3, caractéristique a ou la revendication 4 dans la mesure où elle dépend de la revendication 3, caractéristique a 4, caractérisé en ce que pour les applications en courant continu, l'élément (9; 9i, 9s) de contrôle du champ est prévu sur toute la surface de la partie isolante (2; 2a, 2b; 2c), est continu le long de l'extension longitudinale (x) de la partie isolante (2; 2a, 2b; 2c) et est en contact électrique à la fois avec la première bride de montage (4) et avec la deuxième bride de montage (8).
  7. Passage (1') selon l'une des revendications précédentes, caractérisé en ce que
    a) la première bride de montage (4) est une bride de montage (4) côté terre destinée à monter le passage (1') sur le boîtier (5) raccordé à la terre d'un appareil électrique,
    b) la deuxième bride de montage (8) est une bride de montage (8) côté tension destinée à monter le passage (1') sur une partie à haute tension et/ou
    c) la partie isolante (2; 2a, 2b; 2c) présente à l'intérieur un espace d'isolation pour un matériau isolant solide (20) ou pour un isolant liquide (20), ou un espace de gaz pour un gaz isolant (20).
  8. Passage (1') selon la revendication 7, caractéristique a et la revendication 7, caractéristique b, caractérisé en ce que
    a) un autre élément (9; 9b) de contrôle du champ est prévu et présente des propriétés électriques non linéaires et/ou des propriétés diélectriques appropriées, en particulier celles définies dans la revendication 3, et est disposé dans une zone (7; 7a, 7b) de sollicitation par le champ au niveau de la deuxième bride de montage (8), sur une longueur prédéterminée (1; l2) et une épaisseur (d, d(l2)) sur la partie isolante (2; 2a, 2b; 2c) et
    b) en particulier le deuxième élément (9; 9b) de contrôle du champ sert à remplacer une électrode de blindage (6b) au niveau de la deuxième bride de montage (8).
  9. Passage (1') selon la revendication 8, caractérisé en ce que :
    a) l'autre élément (9; 9b) de contrôle du champ est en contact électrique avec la deuxième bride de montage (8; 4) et/ou
    b) l'autre élément (9; 9b) de contrôle du champ est séparé de l'élément (9; 9a; 9i, 9o) de contrôle du champ au niveau de la première bride de montage (4) par une zone exempte de matériau de contrôle du champ, qui s'étend le long de l'extension longitudinale de la partie isolante (2; 2a, 2b).
  10. Passage (1') selon l'une des revendications précédentes, caractérisé en ce que
    a) l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ est prévu sous la forme d'un revêtement ou sous forme massive et est intégré sur un côté intérieur (21) et/ou dans une couche intermédiaire (22) entre les composants (2a, 2b) de la partie isolante (2; 2a, 2b), et/ou est prévu sur un côté extérieur (23), en particulier sous la forme de bandes horizontales (9o) disjointes, de la partie isolante (2; 2a, 2b; 2c), et/ou en ce que
    b) l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ assure une fonction de support mécanique et en particulier le matériau (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ assure la fonction d'auto-support exclusivement mécanique dans la partie isolante (2; 2a, 2b; 2c).
  11. Passage (1') selon l'une des revendications précédentes, caractérisé en ce que l'élément (9; 9a, 9b; 9i, 9o; 9s) de contrôle du champ comporte une matrice, en particulier un époxy, un silicone, un EPDM, un thermoplastique, un élastomère thermoplastique ou du verre, et en ce que la matrice est remplie de :
    a) particules de microvaristor, en particulier des particules dopées de ZnO, de TiO2 ou de SnO2 et/ou
    b) est remplie de particules à haute constante diélectrique, en particulier de particules de BaTiO3 ou de particules de TiO2.
  12. Appareil électrique à haute tension, en particulier disjoncteur, commutateur de puissance à l'air libre, commutateur sous vide, rupteur à cuve morte, convertisseur de courant, convertisseur de tension, transformateur, condensateur de puissance ou borne de fin de câble, caractérisé en ce qu'il présente un passage diélectrique (1') selon l'une des revendications précédentes.
  13. Installation de commutation électrique, en particulier installation de commutation électrique à haute ou moyenne tension, caractérisée par un appareil électrique à haute tension selon la revendication 12.
EP04405151A 2004-03-15 2004-03-15 Traversée haute tension avec élément pour les contrôle du champ électrique Expired - Lifetime EP1577904B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT04405151T ATE546818T1 (de) 2004-03-15 2004-03-15 Hochspannungsdurchführung mit feldsteuermaterial
EP04405151A EP1577904B1 (fr) 2004-03-15 2004-03-15 Traversée haute tension avec élément pour les contrôle du champ électrique
US11/079,858 US7262367B2 (en) 2004-03-15 2005-03-15 High voltage bushing with field control material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405151A EP1577904B1 (fr) 2004-03-15 2004-03-15 Traversée haute tension avec élément pour les contrôle du champ électrique

Publications (2)

Publication Number Publication Date
EP1577904A1 EP1577904A1 (fr) 2005-09-21
EP1577904B1 true EP1577904B1 (fr) 2012-02-22

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US (1) US7262367B2 (fr)
EP (1) EP1577904B1 (fr)
AT (1) ATE546818T1 (fr)

Cited By (1)

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CN106199117B (zh) * 2016-07-15 2018-11-23 中国南方电网有限责任公司超高压输电公司检修试验中心 一种直流分压器辅助伞裙设计方法

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ATE546818T1 (de) 2012-03-15
EP1577904A1 (fr) 2005-09-21
US20050199418A1 (en) 2005-09-15

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