WO1999018582A1 - Dispositif electrique haute tension - Google Patents

Dispositif electrique haute tension Download PDF

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Publication number
WO1999018582A1
WO1999018582A1 PCT/SE1998/001533 SE9801533W WO9918582A1 WO 1999018582 A1 WO1999018582 A1 WO 1999018582A1 SE 9801533 W SE9801533 W SE 9801533W WO 9918582 A1 WO9918582 A1 WO 9918582A1
Authority
WO
WIPO (PCT)
Prior art keywords
support member
conductor
electric device
electrically insulating
coating
Prior art date
Application number
PCT/SE1998/001533
Other languages
English (en)
Inventor
Udo Fromm
Anna Kron
Mats Leijon
Rongsheng Liu
Thorsten Schütte
Lars Walfridsson
Dan Windmar
Li Ming
Original Assignee
Abb Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Ab filed Critical Abb Ab
Priority to AU88962/98A priority Critical patent/AU8896298A/en
Priority to JP2000515278A priority patent/JP2001519584A/ja
Priority to DE19882718T priority patent/DE19882718T1/de
Publication of WO1999018582A1 publication Critical patent/WO1999018582A1/fr
Priority to SE0001156A priority patent/SE514974C2/sv

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/066—Devices for maintaining distance between conductor and enclosure

Definitions

  • the present invention relates to a high- voltage electric device comprising at least one conductor and an electrically insulating support member separating the conductor from any other conductor or from any other electrically conductive object included in the device, such as a metallic enclosure.
  • the invention is particularly useful in high- voltage gas or air insulated switchgear.
  • conductors are electrically insulated from other conductors or other conducting objects, such as metallic enclosures or structural elements, by an intervening solid, liquid and/or gaseous electrical insulation.
  • a spacer or other form of support member is employed to ensure that the conductor is held sufficiently spaced apart from other conductors or electrically conductive components.
  • the design of the triple point i.e. the point where the conductor, the insulating gas and the support member are all in contact with each other, because an unsuitably designed triple point amplifies the electric field forces if, as is normally the case, the support member has a relative dielectric constant higher than the relative dielectric constant of the insulating gas or air, and
  • breakdown voltage or “puncture voltage” as used in this application, is the voltage across the insulation at which the insulation loses its electrical insulation function
  • -"partial discharge inception voltage is the voltage across the insulation for which a partial breakdown occurs or, more accurately, starts in a part of the insulation system, which part may be a complete component or a portion of a component in the insulation system.
  • the conductor is at least partly covered or coated with an electrically insulating layer.
  • the insulating layer shall have sufficient dielectric strength and in combination with the basic gaseous insulating medium provide sufficient insulation for the given spacing and voltage difference, the dielectric strength for a given material being determined by the thickness of the insulating layer.
  • the electrically insulating coating provided on the conductor shall have a thickness sufficient to withstand electrical puncture at a voltage which is at least 30 %, and preferably at least 50%, of the breakdown voltage of the insulation system of which the insulating coating forms part.
  • the triple point of importance will be the point where the conductor coating, the insulating gas and the support member are all in contact with each other.
  • a barrier arranged to increase the creep distance, e.g. a barrier in the form of one or more discoid protrusions.
  • a barrier may be combined with an electric field smoothing termination such that the starting and propagation of any creeping discharge are avoided by a combination of a barrier effect and an electric field smoothing.
  • the spacer could be made from a material with a relative dielectric constant close to the relative dielectric constant of the insulating gas or air, that is, close to 1, then only the conductor or electrode design and the insulating strength of the gas would determine the dielectric strength of the insulation system. The influence and importance of the triple point and the surface conditions would be substantially reduced.
  • the material had a porous structure having closed gas-filled essentially spherical voids with a mean diameter of about 50 ⁇ m and a density of 0.05 g/cm '3 , corresponding to a gas volume exceeding 95 % of the total volume of the material.
  • the primary object of the present invention therefore is to provide a compact high- voltage electric device that possesses a high capability to withstand partial discharge and dielectric breakdown resulting from it.
  • the high- voltage electric device should be suited for use in high-voltage switchgear applications or in other applications where at least one conductor operates at high voltage and a substantial part of the electrical conductor insulation is provided by a gaseous insulting medium.
  • a further object of the present invention is to provide a compact high- voltage electric device comprising a support member for a high-voltage conductor and having a low relative dielectric constant and a sufficient mechanical strength.
  • a gas or air insulated electric device comprising at least one conductor, an electrically insulating support member surrounded by a gaseous insulating medium and keeping the conductor spaced apart from other electrically conducting bodies of the device, such as structural or enclosure members, the support member comprising a porous insulating material, characterized in that the conductor is at least partly covered by an electrically insulating coating, the porous insulating material is a polymeric material having a solids content of 30 % by volume or less, and the relative dielectric constant of the support member is 1.5 or less.
  • the support member contacts the conductor where the conductor, which may be a single solid body or comprise a plurality of strands, is covered by the electrically insulating coating.
  • the pores of the porous polymeric insulating material are open.
  • support members with closed pores are preferably used.
  • the pores, whether open or closed have a mean equivalent diameter of 250 ⁇ m or less.
  • the electrically insulating coating on the conductor should have sufficient dielectric strength to provide in combination with the gaseous insulating medium an insulation that is adequate for the given spacing and voltage.
  • the dielectric strength is determined by the thickness of the coating. It is preferred, therefore, for the coating to have a thickness sufficient for it to withstand electrical puncture at a voltage up to 30 %, and more preferred, 50 %, of the breakdown voltage of the insulation system between the conductor and a neighbouring conducting body.
  • this is achieved with a polymeric coating material having a low dielectric constant, such as silicone rubber, if the thickness of the electrically insulating coating on the conductor is at least 5 % of the radius of the conductor in the case of a conductor of circular cross-section.
  • the thickness preferably is at least 1mm, preferably 3 mm, in the case of a conventional conductor or conducting bar in a high-voltage installation.
  • the relative dielectric constant of the support member is close to the relative dielectric constant of the gaseous insulating medium, i.e. close to 1.
  • the porous insulating material of the support member at least wherever it is contacted by the gaseous insulating medium, has a mean equivalent pore diameter of 100 ⁇ m or less, preferably about 50 ⁇ m, i.e. ranging from 25 to 75 ⁇ m, and a solids content of 20 % by volume or less, preferably about 5 % by volume, i.e. ranging from 3 to 10 % by volume.
  • mean equivalent pore diameter is defined as the diameter of a sphere the volume of which is equal to the mean pore volume.
  • the support member may have to carry a substantial load, e.g. because it has to support the weight of the conductor and absorb bending and traction forces and also attraction or repulsion forces applied to it as a result of a high-amperage current flowing in it or a neighbouring conductor.
  • a substantial load e.g. because it has to support the weight of the conductor and absorb bending and traction forces and also attraction or repulsion forces applied to it as a result of a high-amperage current flowing in it or a neighbouring conductor.
  • embodiments of the present invention comprise an internal mechanical reinforcement which is embedded in and essentially completely covered by the porous insulating material of the support member.
  • the mechanical reinforcement can take different forms:
  • an open rigid foam structure the open porosity of which is at least partly impregnated by the porous polymeric insulating material and completely or essentially completely covered by that material;
  • any body, structure or fiber used for the reinforcement should be completely or essentially completely covered by a layer of the porous polymeric insulating material, only electrically insulating materials are suitable for use and another criterion for choosing the reinforcement will be the required mechanical properties of the support member. Of course, any interactions between the reinforcement and electric or electromagnetic fields created at the conductor should be taken into account when designing the reinforced support member.
  • Suitable materials for a solid reinforcing body in the interior of the support member are: electrically insulating polymeric materials, such as a polyolefin, a polyamide, a phenolic resin or the like, and electrically insulating ceramics, such as porcelain, an oxide, a silicate, glass or the like.
  • the open net-like structures and the reinforcing fibers can comprise electrically insulating materials such as fibers, wires or nets made from glass or polymeric materials, e.g. polyamide based materials, polyolefins or the like .
  • the support member comprises, at least at the surfaces thereof exposed to the gaseous insulation, a porous polymeric foam structure produced from gas filled polymeric spheres with a diameter ranging from a few ⁇ m to a few hundred ⁇ m, so called microspheres.
  • the polymeric foam was produced from a mixture of expanded microspheres with a diameter of about 50 ⁇ m and unexpanded microspheres with a diameter of about 15 ⁇ m and no extra binder or resin additions. The mixture of expanded and unexpanded microspheres was expanded under such conditions that an essentially rigid porous body with a foamed structure of microspheres bonded to each other was obtained.
  • the resulting body had a mean equivalent pore diameter of about 50 ⁇ m, a density of about 0.05 g/cm 3 , a gas content of about 95 percent by volume and a relative dielectric constant of about 1.1.
  • Suitable microspheres have been found to be butane filled poly- vinylidene chloride spheres, but of course other microspheres made from an electrically insulating thermoplastic resin and filled with a suitable gas can also be used. Examples of suitable microspheres include those sold under the trade mark EXPANCEL by Akzo Nobel.
  • the electrically insulating coating covering at least a part of the conductor may suitably be combined with means for preventing propagation of creeping discharges, so-called streamers, along the covered conductor and especially to prevent such discharges from passing over to the support member.
  • the conductor coating is combined with a barrier extending the creep distance, e.g. a barrier in the form of one or more discoid protrusions and provided on opposite sides of the area of contact between the coating and the support member.
  • the barrier is associated with an electric field smoothing termination whereby the propagation of any creeping discharge from the covered conductor to the support member is avoided by a combination of a barrier effect and electric field smoothing.
  • the electrically insulating coating on the conductor comprises, in addition to an electrically insulating base layer, at least one inner semi-conducting layer arranged as a shield to eliminate essentially all electric field concentrations at or adjacent to surface defects or other irregularities on the conductor surface.
  • the semi-conducting shield is formed around the conductor, preferably in the form of a layer within the coating.
  • Figure 1 a simple schematic cross-sectional illustration of an electric device according to the invention comprising a coated conductor and support member;
  • Figure 2 is a simple schematic cross-sectional illustration of an electric device according to the invention with a reinforced support member
  • Figure 3 is a simple schematic cross-sectional illustration of an electric device according to the invention comprising a support member with a modified internal support structure;
  • Figure 4 is a schematic longitudinal sectional view of an electric device according to the invention comprising a coated conductor and two support members;
  • Figure 5 is a simple schematic cross-sectional illustration of an electric device according to the invention comprising a coated conductor, three support members and a casing;
  • Figure 6 is a simple schematic cross-sectional illustration of an electric device according to the invention comprising a three-phase assembly of conductors and support members.
  • Figure 7 is a longitudinal sectional view of an example of a covered conductor which can be included in a device according to the invention.
  • the electrically insulating coating 2 at least partly covers the conductor, and the support member 3 comprises an electrical insulation formed of a porous polymeric material.
  • a gaseous insulating medium surrounds and contacts the conductor 1 with its coating 2, and the support member 3.
  • the relative dielectric constant of the support member 3 is- close to that of air, i.e. close to 1, and the support member comprises a porous structure with a solids content of 30 % by volume or less.
  • the support member 3 has an internal structure and a surface structure such that its relative dielectric constant is 1.5 or less.
  • the support member 3 contacts the conductor 1 where the conductor 1, which may be a single solid body or comprise a plurality of wire strands or other conductor component parts, is covered by the electrically insulating coating 2.
  • the support member 3 comprises, at least at any surface thereof exposed to the gaseous insulation, a porous polymeric foam structure.
  • the polymeric foam is produced from gas filled polymeric spheres of a diameter in the range from a few ⁇ m to a few hundred ⁇ m, so-called microspheres.
  • the polymeric foam was produced from a mixture of expanded microspheres with a diameter of about 50 ⁇ m and unexpanded microspheres of about 15 ⁇ m diameter without any extra binder or resin additions. The mixture of expanded and unexpanded microspheres was expanded under such conditions that a stiff porous body with a foamed structure of microspheres bonded to each other was obtained.
  • the resulting body had a mean equivalent pore diameter of about 50 ⁇ m, a density of about 0.05 g/cm 3 , a gas content of about 95 percent by volume and a relative dielectric constant of about 1.1.
  • the microspheres used were butane filled polyvinylidene chloride spheres (EXPANCEL®).
  • the electric device additionally comprises an internal reinforcement 14 embedded in the support member 13.
  • This reinforcement 14 has been added to improve the mechanical properties of the support member 13 and to provide the required mechanical strength of the support member 13. It is enclosed in the support member 13 such that essentially no part of it is contacted by the gaseous electrically insulating medium, i.e. the mechanical reinforcement 14 is embedded in and completely or substantially completely covered by the porous polymeric insulating material.
  • the support member 13 has to possess adequate mechanical strength to withstand the pressure, bending and traction forces to which it is subjected as a consequence of the load imposed on it by the weight of the conductor and attraction or repulsion forces caused by a high-amperage current flowing through the conductor 11 or an adjacent conductor.
  • the mechanical reinforcement 14 can be a single body as shown in Figure 2 by a single body arranged as a supporting, load carrying structure disposed within the support member and embedded in and completely or substantially completely covered by the porous polymeric insulation.
  • Suitable materials for a solid body 14 disposed within the support member 13 include electrically insulating polymeric materials, such as a polyolefin, a polyamide, a phenolic resin or the like, and an electrically insulating ceramic, such as porcelain, an oxide, a silicate, glass or the like.
  • the reinforcement 14 may comprise a plurality of solid bodies, or it may be formed by a net-like open reinforcing, supporting and load carrying structure of bars or wires disposed within the support member and embedded in and completely or substantially completely covered by the porous polymeric insulating material, or by an open rigid foam structure the open pores of which are at least partly impregnated with the porous polymeric insulating material and embedded in and completely or almost completely covered by the porous polymeric insulating material.
  • Reinforcing fibers dispersed in a matrix formed by the porous polymeric insulating material can also be used.
  • the fiber-reinforced reinforcement body 14 is surrounded by and completely or substantially completely covered by a layer of the porous polymeric insulating material substantially free from reinforcing fibers.
  • any reinforcement 14 used regardless of its structure and composition, will be completely or substantially completely covered by a layer of the porous polymeric insulating material, only electrically insulating materials are suitable for use, and another factor in the choice of the reinforcement relates to the mechanical properties of the support member.
  • the open net- like structures and the reinforcing fibers may comprise electrically insulating materials such as fibers, wires or nets made from glass or polymeric materials, e.g. polyamide based materials, polyolefms or the like.
  • the reinforcement 14 may be fully enclosed in the support member 13, or as shown in Figure 3, the reinforcement 34 may contact the coated conductor 31 and/or a structural or enclosure member 35 with its end surfaces but may otherwise be covered by the porous polymeric insulation 33 on all surfaces exposed to the insulating gas.
  • the electrically insulating coating 22 covering at least part of the conductor 21 is combined with means 26 for preventing initiation and propagation of creeping discharges along the coated or covered conductor 21 and especially to prevent any creeping discharge (streamer) to pass over to the support member 23. More particularly, on each side of the place where the support member 23 contacts the coating 22, the coating is combined with a barrier 26a extending the creeping distance, e.g. a barrier in the form of one or more discoid projections around the conductor, and with an electric field smoothing termination (cable termination) 26b such that the propagation of any creeping discharge from the coated conductor 21 to the support member 23 is avoided by a combination of a barrier effect and electric field smoothing.
  • a barrier 26a extending the creeping distance, e.g. a barrier in the form of one or more discoid projections around the conductor, and with an electric field smoothing termination (cable termination) 26b such that the propagation of any creeping discharge from the coated conductor 21 to the support member 23
  • Figure 5 shows an electric device including a tubular casing or casing portion 5 in which a coated conductor 41 is kept in position by an assembly of three angularly spaced-apart support members 43a, 43b, 43c such that the insulation system comprises the insulating coating 42 on the conductor 41, the gaseous insulation around the covered conductor 41, and the porous support members 43a, 43b, 43c which may be made of a material of the kind described above.
  • the support members 43a, 43b, 43c shown in Figure 5 may comprise a reinforcement as described above.
  • means for preventing start and propagation of creeping discharges along the surface of the insulating coating 42 similar to that shown in figure 4 may also be provided.
  • FIG. 6 shows an embodiment of the electric device according to the invention comprising three conductors 51a, 51b, 51c, each covered by an electrically insulating coating 52a, 52b, 52c and forming a three-phase assembly in which the conductors 51a, 51b, 51c are separated by support members 53a, 53b, 53c.
  • Each such support member comprises a porous polymeric insulating material and a reinforcement 54a, 54b, 54c embedded therein.
  • the reinforcement 54a, 54b, 54c can of course be left out, should the porous polymeric insulation provide sufficient mechanical properties by itself.
  • means for preventing start and propagation of creeping discharges along the surface of the insulation as described above and shown in Figure 4 may advantageously be provided in this embodiment also.
  • FIG. 7 is an exploded view of a covered conductor in the form of a T-joint which may form part of a high- voltage device according to the invention. More particularly, this figure shows a T-joint 50 for a busbar in a substation of a high-voltage energy distribution system.
  • T-joint 50 is made of copper or aluminium and comprises a center piece 51 and three tubular connectors 52, each receptive of busbar end sections 53, only one of which is shown.
  • the entire exterior surface of the T-joint 50, i.e. the center piece 51 and the tubular connectors 52 as well as the interior surfaces of the connectors are covered by a coating 54 of an insulating polymer material as describe above.
  • a similar coating 54 is applied to the circumferential exterior surfaces of the busbar end sections 53.
  • the busbar end sections 53 are slid into the associated tubular connectors 51 as indicated by an arrow in respect of the left busbar end section 53 and secured by means of screws 55, which can be manipulated through an opening 56 in the centre, piece 51.
  • the illustrated T-joint 50 and the busbar end sections 53 can form a conductor supported by and in contact with a support member or spacer according to the invention so as to be kept spaced apart from, for example, a grounded portion of a metal enclosure (not shown).

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Installation Of Bus-Bars (AREA)
  • Insulating Bodies (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Insulators (AREA)

Abstract

L'invention concerne un dispositif électrique étanche au gaz et à l'air et doté d'un conducteur (1). Ce dispositif est maintenu à une certaine distance d'un corps conducteur (5) voisin, tel qu'un élément structurel ou une enveloppe, par un élément-support (3) et est entouré d'un milieu isolant du gaz. Le conducteur (1) est recouvert au moins partiellement d'un revêtement électriquement isolant (2). L'élément-support (3) comprend un matériau poreux électriquement isolant contenant des solides à raison de 30 % par volume maximum et ayant une constante diélectrique relative de 1,5 maximum.
PCT/SE1998/001533 1997-10-07 1998-08-27 Dispositif electrique haute tension WO1999018582A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU88962/98A AU8896298A (en) 1997-10-07 1998-08-27 High-voltage electric device
JP2000515278A JP2001519584A (ja) 1997-10-07 1998-08-27 高電圧装置
DE19882718T DE19882718T1 (de) 1997-10-07 1998-08-27 Elektrische Hochspannungsvorrichtung
SE0001156A SE514974C2 (sv) 1997-10-07 2000-03-31 Elektrisk högspänningsanordning

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9703647A SE513300C2 (sv) 1997-10-07 1997-10-07 Gas- eller luftisolerad elektriks anordning innefattande en bärare med låg dielektricitetskonstant för en ledare
SE9703647-9 1997-10-07

Publications (1)

Publication Number Publication Date
WO1999018582A1 true WO1999018582A1 (fr) 1999-04-15

Family

ID=20408528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001533 WO1999018582A1 (fr) 1997-10-07 1998-08-27 Dispositif electrique haute tension

Country Status (5)

Country Link
JP (1) JP2001519584A (fr)
AU (1) AU8896298A (fr)
DE (1) DE19882718T1 (fr)
SE (1) SE513300C2 (fr)
WO (1) WO1999018582A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6624352B2 (en) 2001-10-29 2003-09-23 Abb Research Ltd GIS post insulator with an integrated barrier
CN102577629A (zh) * 2009-09-15 2012-07-11 三菱电机株式会社 等离子体生成装置
WO2021058500A1 (fr) * 2019-09-26 2021-04-01 Maschinenfabrik Reinhausen Gmbh Mousse syntactique sèche utilisée comme matériau électriquement isolant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015211722A1 (de) * 2015-06-24 2016-12-29 Siemens Aktiengesellschaft Leitungsmodul für eine erdverlegbare Hochspannungsleitung, Hochspannungsleitung mit Leitungsmodulen sowie Verfahren zur Herstellung der Leitungsmodule

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1665023A1 (de) * 1968-03-13 1970-09-10 Licentia Gmbh Isolation fuer elektrische Bauteile
EP0112807A2 (fr) * 1982-11-26 1984-07-04 Casco Nobel Aktiebolag (reg. number 556026-1876) Procédé pour expander des microsphères
DE3911041A1 (de) * 1989-04-05 1990-10-11 Gore W L & Ass Gmbh Isolationsmaterial fuer hochfrequenzleitungen
EP0455407A2 (fr) * 1990-05-01 1991-11-06 Junkosha Co. Ltd. Matériau d'isolation et production du même
WO1997039484A1 (fr) * 1996-04-12 1997-10-23 W.L. Gore & Associates, Inc. Procede de fabrication d'une structure d'interconnexion faisant intervenir le laminage d'une membrane dielectrique poreuse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1665023A1 (de) * 1968-03-13 1970-09-10 Licentia Gmbh Isolation fuer elektrische Bauteile
EP0112807A2 (fr) * 1982-11-26 1984-07-04 Casco Nobel Aktiebolag (reg. number 556026-1876) Procédé pour expander des microsphères
DE3911041A1 (de) * 1989-04-05 1990-10-11 Gore W L & Ass Gmbh Isolationsmaterial fuer hochfrequenzleitungen
EP0455407A2 (fr) * 1990-05-01 1991-11-06 Junkosha Co. Ltd. Matériau d'isolation et production du même
WO1997039484A1 (fr) * 1996-04-12 1997-10-23 W.L. Gore & Associates, Inc. Procede de fabrication d'une structure d'interconnexion faisant intervenir le laminage d'une membrane dielectrique poreuse

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FROMM U. et al., "Behavior of Surface Discharges Along a Polymer Foam Insulator in Air", 10TH INTERN. SYMP. ON HIGH VOLTAGE ENGINEERING, 25-29 Aug. 1997, HYDRO QUEBEC, (Montreal, CA), pages 55-56. *
IEEE TRANSACTIONS ON ELECTRICAL INSULATION, Volume EI-20, No. 1, February 1985, J.R. LAGHARI, "Spacer Flashover in Compressed Gases", pp. 83-92. *
IEEE TRANSACTIONS ON ELECTRICAL INSULATION, Volume EI-20, No. 5, October 1986, T.S. SUDARSHAN et al., "Mechanisms of Surface Flashover Along Solid Dielectrics in Compressed Gases: A Review", pages 727-746. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6624352B2 (en) 2001-10-29 2003-09-23 Abb Research Ltd GIS post insulator with an integrated barrier
CN102577629A (zh) * 2009-09-15 2012-07-11 三菱电机株式会社 等离子体生成装置
WO2021058500A1 (fr) * 2019-09-26 2021-04-01 Maschinenfabrik Reinhausen Gmbh Mousse syntactique sèche utilisée comme matériau électriquement isolant
CN114521200A (zh) * 2019-09-26 2022-05-20 赖茵豪森机械制造公司 作为电绝缘材料的干燥复合泡沫
CN114521200B (zh) * 2019-09-26 2023-08-15 赖茵豪森机械制造公司 作为电绝缘材料的干燥复合泡沫

Also Published As

Publication number Publication date
JP2001519584A (ja) 2001-10-23
DE19882718T1 (de) 2000-09-28
SE513300C2 (sv) 2000-08-21
AU8896298A (en) 1999-04-27
SE9703647L (sv) 1999-04-08
SE9703647D0 (sv) 1997-10-07

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