WO1980000281A1 - Procede de fabrication d'un isolateur en materiau electriquement isolant - Google Patents

Procede de fabrication d'un isolateur en materiau electriquement isolant Download PDF

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Publication number
WO1980000281A1
WO1980000281A1 PCT/CH1979/000075 CH7900075W WO8000281A1 WO 1980000281 A1 WO1980000281 A1 WO 1980000281A1 CH 7900075 W CH7900075 W CH 7900075W WO 8000281 A1 WO8000281 A1 WO 8000281A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulator
electrically conductive
coated
conductive material
electrically
Prior art date
Application number
PCT/CH1979/000075
Other languages
German (de)
English (en)
Inventor
P Klee
Original Assignee
Bbc Brown Boveri & Cie
P Klee
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 Bbc Brown Boveri & Cie, P Klee filed Critical Bbc Brown Boveri & Cie
Publication of WO1980000281A1 publication Critical patent/WO1980000281A1/fr

Links

Classifications

    • 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
    • H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
    • H01B19/04—Treating the surfaces, e.g. applying coatings

Definitions

  • the invention relates to a method for producing an insulator consisting of electrically insulating material, in particular an insulator made of casting resin for a metal-encapsulated, gas-insulated high-voltage switchgear assembly, which has surfaces which are coated with conductive material in a casting mold.
  • Metal-encapsulated, gas-insulated busbars or other inner conductors in metal-encapsulated, gas-insulated high-voltage switchgear must be kept inside the encapsulation, insulated from the outer encapsulation. This is carried out by means of disk-shaped insulators which - in the case of single-phase encapsulation - have a central hole through which the inner conductor extends or - in the case of a three-phase encapsulated arrangement - have three holes at the corners of a triangle, which serve to hold and insulate the three phase conductors.
  • Isolator i.e. the inner surface of the insulator electrically conductive materials such as Introduces conductive varnish or conductive casting resins.
  • the object of the invention is to provide a method with which a conductive plastic can be permanently, impact and scratch-resistant attached to the inner surface of an insulator.
  • This object is achieved in that the surfaces of the casting mold, which are in the area of the surfaces to be coated with electrically conductive material on the insulator, are first coated with a release agent and then with an electrically conductive material, and then the casting mold with the electrical insulating material is poured out.
  • a special embodiment of insulators for high-voltage switchgear is that the outer surface of the projection is coated with a release agent, then with an electrically conductive material, in particular a conductive varnish, then with an additional, preferably thixotropic, insulating varnish, and then the casting mold is coated with the electrically insulating material is poured to form the insulator.
  • a conductive lacquer tailored to the respective requirements is applied to the protrusion or the core of the casting mold for the recesses and, if present, the solvent contained is evaporated.
  • the conductive varnish is then covered with a thixotropic insulating varnish. Both the lead and the Insulating varnish must be adjusted so that it is dry on the surface (hardened) until it is cast with casting resin.
  • the casting resin is then poured into the mold to produce the insulator and the corresponding curing procedure is carried out.
  • the insulator is removed. This creates a uniform molded body without separating layers and without the associated adhesion problems.
  • Fig. 1 is a mold for producing a
  • Fig. 2 shows a partial section through the layer on the
  • the casting mold consists of a cup-shaped lower mold part 10, with a bottom part 12 and with a cylinder-like shape 14 that runs perpendicular to the bottom part 12 and serves as a wall of the casting mold.
  • a. molded as a casting core projection 16 which tapers slightly conically towards its free end.
  • the outer surface of the projection 16 is coated with a release agent (not shown) and then with a layer of conductive plastic, in particular conductive lacquer 20. If solvent is present in the conductive lacquer 20, it is evaporated. Thereafter, the conductive varnish 20 is covered by spraying with a thixotropic insulating varnish 22, the task of which is to prevent conductive particles from possibly being washed out of the conductive varnish. It is necessary that the conductive varnish and the insulating varnish are only dry on the surface. As soon as this degree of dryness is reached, the casting mold is closed with a mold upper part 24 and poured with casting resin in order to produce the insulator 18. Then the mold with the insulator is subjected to a curing process. When the casting resin, the conductive and insulating varnish have hardened, the insulator can be removed; this creates a uniform molded body without separating layers and without the associated hardening problems.
  • the casting resin from which the insulator is made is preferably an epoxy liquid resin with high temperature resistance.
  • the resin base of the conductive lacquer and the covering or insulating lacquer is matched to this casting resin.
  • FIG. 2 shows an enlarged section of the isolator. You can see the insulator 18, on the
  • the inner surface of the insulating layer 22 and the conductive lacquer layer 20 are applied.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Insulating Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Pour fabriquer un isolateur de cloisonnement (18) destine a des interrupteurs a enceinte fermee contenant du SF6 et pour former une couche (20) electriquement conductrice, les surfaces du moule de coulee qui se trouvent dans la zone des surfaces electriquement conductrices de l'isolateur sont revetues d'abord d'un produit de separation et ensuite d'un materiau electriquement conducteur, apres quoi le moule est rempli du materiau electriquement isolant.
PCT/CH1979/000075 1978-07-24 1979-05-23 Procede de fabrication d'un isolateur en materiau electriquement isolant WO1980000281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2832458 1978-07-24
DE19782832458 DE2832458A1 (de) 1978-07-24 1978-07-24 Verfahren zur herstellung eines aus elektrisch isolierendem material bestehenden isolators

Publications (1)

Publication Number Publication Date
WO1980000281A1 true WO1980000281A1 (fr) 1980-02-21

Family

ID=6045242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1979/000075 WO1980000281A1 (fr) 1978-07-24 1979-05-23 Procede de fabrication d'un isolateur en materiau electriquement isolant

Country Status (4)

Country Link
EP (1) EP0015996A1 (fr)
DE (1) DE2832458A1 (fr)
HU (1) HU177175B (fr)
WO (1) WO1980000281A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1539056A (fr) * 1967-07-12 1968-09-13 Westinghouse Electric Corp Pièces isolantes électriques résistant aux intempéries
FR2340184A1 (fr) * 1976-02-04 1977-09-02 Henkel & Cie Gmbh Pieces moulees reticulees de matiere synthetique et d'elastomere a surface peinte
DE2624908A1 (de) * 1976-06-03 1977-12-15 Bbc Brown Boveri & Cie Dreiphasig gekapselte, druckgasisolierte hochspannungsschaltanlage
DE2625071A1 (de) * 1976-06-04 1977-12-15 Bbc Brown Boveri & Cie Verfahren zur erhoehung der leitfaehigkeit an oberflaechen von isolatoren aus anorganischem material, wie z.b. keramik, glas etc., oder organischen materialien, wie z.b. epoxidharz, andere giessharze etc., und aus mischungen beider materialien

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1539056A (fr) * 1967-07-12 1968-09-13 Westinghouse Electric Corp Pièces isolantes électriques résistant aux intempéries
FR2340184A1 (fr) * 1976-02-04 1977-09-02 Henkel & Cie Gmbh Pieces moulees reticulees de matiere synthetique et d'elastomere a surface peinte
DE2624908A1 (de) * 1976-06-03 1977-12-15 Bbc Brown Boveri & Cie Dreiphasig gekapselte, druckgasisolierte hochspannungsschaltanlage
DE2625071A1 (de) * 1976-06-04 1977-12-15 Bbc Brown Boveri & Cie Verfahren zur erhoehung der leitfaehigkeit an oberflaechen von isolatoren aus anorganischem material, wie z.b. keramik, glas etc., oder organischen materialien, wie z.b. epoxidharz, andere giessharze etc., und aus mischungen beider materialien

Also Published As

Publication number Publication date
HU177175B (en) 1981-08-28
DE2832458A1 (de) 1980-02-14
EP0015996A1 (fr) 1980-10-01

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