EP0337949A2 - Procedure pour l'isolation d'enveloppement pour conducteur conduisant la haute tension - Google Patents

Procedure pour l'isolation d'enveloppement pour conducteur conduisant la haute tension Download PDF

Info

Publication number
EP0337949A2
EP0337949A2 EP89810261A EP89810261A EP0337949A2 EP 0337949 A2 EP0337949 A2 EP 0337949A2 EP 89810261 A EP89810261 A EP 89810261A EP 89810261 A EP89810261 A EP 89810261A EP 0337949 A2 EP0337949 A2 EP 0337949A2
Authority
EP
European Patent Office
Prior art keywords
corrugated tube
conductor
insulation according
insulating layer
sheath insulation
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.)
Granted
Application number
EP89810261A
Other languages
German (de)
English (en)
Other versions
EP0337949A3 (en
EP0337949B1 (fr
Inventor
Hans Felix
Mathias R. Fünfschilling
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.)
Moser Glaser and Co AG
Original Assignee
Moser Glaser and Co AG
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 Moser Glaser and Co AG filed Critical Moser Glaser and Co AG
Publication of EP0337949A2 publication Critical patent/EP0337949A2/fr
Publication of EP0337949A3 publication Critical patent/EP0337949A3/de
Application granted granted Critical
Publication of EP0337949B1 publication Critical patent/EP0337949B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/184—Sheaths comprising grooves, ribs or other projections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0241—Disposition of insulation comprising one or more helical wrapped layers of insulation
    • H01B7/025—Disposition of insulation comprising one or more helical wrapped layers of insulation comprising in addition one or more other layers of non-helical wrapped insulation

Definitions

  • the present invention relates to a sheath insulation for high-voltage conductors of the type specified in the preamble of claim 1.
  • a known structure of the sheath insulation provides an epoxy-insulated conductor, which is wrapped with smooth plastic film tapes. These tapes can, for example, be applied to the inner epoxy resin layer after it has been produced, or they can be applied to a layer of paper before being filled with plastic. The latter type of application requires an extremely careful procedure in order to obtain a sufficiently dense outer layer.
  • the application of the outer insulating layer in the form of a tape wrap is very complex, it being practically impossible to avoid in the manufacturing process that air pockets remain in the overlapping points, even if so-called self-welding tapes are used. These air pockets significantly impair the insulating effect of the casing insulation. Air pockets are particularly critical in the area of the ends of the sheath insulation, where a large electric field occurs in the axial direction.
  • the invention has for its object to form a sheath insulation for high voltage conductors mentioned over the entire length of the conductor to be insulated.
  • the idea of the invention is to replace the previous outer insulation winding with an already tight, continuous and corrugated tube, which is combined with the inner insulating layer to form a joint-free composite insulating body.
  • the covering insulation according to the invention based on a joint-free composite insulating body, thus guarantees excellent insulation both in the radial and in the axial direction over the entire length of the covering insulation.
  • the corrugated outer structure of the sheath insulation according to the invention also advantageously prevents the formation of leakage currents.
  • the corrugation of the tube forming the outer insulating layer is advantageously either designed to run spirally or consists of axially spaced, parallel annular beads.
  • the corrugated tube is preferably made of a plastic which has a slightly greater coefficient of thermal expansion than the inner insulating layer.
  • Cross-linked polyethylene, EPDM, polypropylene, polyamide or silicone rubber are particularly suitable as materials for the corrugated pipe.
  • Additives such as paints, antioxidants or flame retardants can be added to these plastics.
  • the inner insulating layer advantageously consists of a casting resin, in particular an epoxy resin, which covers the cavity between the inner wall of the corrugated tube and the Fills the conductor surface completely.
  • the conductor surface can be enclosed by a main insulating layer, which is optionally wrapped with a further insulating layer.
  • Said insulating winding consists of either paper, nonwoven or plastic, and conductive inserts can be provided in a known manner to control the potential in the winding. All cavities in the insulating body are filled with the plastic.
  • the corrugated tube advantageously lies on the conductor surface via spacers.
  • Epoxy resins, unsaturated polyesters or polyurethanes are particularly suitable as the material for the casting resin forming the inner insulating layer.
  • the casting resin can also contain mineral or organic fillers.
  • the latter is advantageously either pre-treated to impart adhesion, which can be done using known physical treatment methods, such as, for example, corona treatment, or the inner wall of the corrugated tube is provided with an adhesion promoter .
  • the wrapping insulation according to the invention thus stands out from the previously known wrapping insulation with external windings and from that with an outer shrink tube by a number of advantages.
  • this casing also does not require any post-treatment of the surface, as is the case with the previously known impregnated casing insoles tion was necessary.
  • the corrugated outer tube serves as a lost shape, expensive casting or impregnation molds can be omitted.
  • the conductor provided with the sheath according to the invention can be bent in any way, since the corrugated outer tube adapts to any conductor curvature.
  • the above-mentioned materials for the outer corrugated pipe ensure the impact resistance of the casing insulation as well as a low water vapor permeability.
  • an appropriate thermoplastic By using an appropriate thermoplastic, the self-extinguishing behavior of the outer casing of the casing insulation according to the invention is ensured.
  • the covering insulation according to the invention can, however, also be produced with a significantly lower amount of work than the previously known covering insulation.
  • a particularly advantageous manufacturing process provides for the corrugated tube to be first applied to the conductor, from which it is spaced radially evenly to a large extent by spacers, whereupon the cavity between the conductor, the spacers and the corrugated tube is filled with liquid plastic starting products, as is subsequently hardened will.
  • the plastic starting products are advantageously filled into the cavity between the conductor, spacers and corrugated tube under vacuum. This ensures that the cavity is filled completely and without gas bubbles with the reactive casting resin.
  • the conductor 6 of Fig. 1 is surrounded by a multi-layer insulation 4, which consists of paper or a nonwoven fabric.
  • Conductive inserts 3 for controlling the potential are embedded in the insulating winding 4 in a known manner.
  • the outer insulating layer of the sheath insulation is formed by a corrugated tube 1, which consists of an elastic and / or thermoplastic material.
  • FIGS. 2 and 3 Two variants of the corrugation of the outer tube 1 are indicated in FIGS. 2 and 3. 2, the corrugation 9 of the outer tube 1 of the sheath insulation runs continuously in a spiral. In the variant of Fig. 3, the corrugation of the tube 1 is formed by axially evenly spaced annular beads 10. Both variants are suitable for effective suppression of axial leakage currents on the surface of the casing insulation.

Landscapes

  • Insulating Bodies (AREA)
  • Insulated Conductors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Organic Insulating Materials (AREA)
  • Communication Cables (AREA)
EP89810261A 1988-04-14 1989-04-06 Procedure pour l'isolation d'enveloppement pour conducteur conduisant la haute tension Expired - Lifetime EP0337949B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812456 1988-04-14
DE3812456A DE3812456A1 (de) 1988-04-14 1988-04-14 Umhuellungsisolation fuer hochspannung fuehrende leiter

Publications (3)

Publication Number Publication Date
EP0337949A2 true EP0337949A2 (fr) 1989-10-18
EP0337949A3 EP0337949A3 (en) 1990-04-25
EP0337949B1 EP0337949B1 (fr) 1994-09-07

Family

ID=6351988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810261A Expired - Lifetime EP0337949B1 (fr) 1988-04-14 1989-04-06 Procedure pour l'isolation d'enveloppement pour conducteur conduisant la haute tension

Country Status (3)

Country Link
EP (1) EP0337949B1 (fr)
AT (1) ATE111260T1 (fr)
DE (2) DE3812456A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014032657A1 (fr) * 2012-08-31 2014-03-06 Otto-Von-Guericke-Universität Magdeburg Dispositif pour conduire un courant sous haute tension et pour transmettre des données, et procédé de production correspondant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100955A1 (de) 2013-01-30 2014-07-31 E&A Elektrotechnik und Automatisierung GmbH Vorrichtung zum Leiten von elektrischem Strom
CN103337817A (zh) * 2013-06-04 2013-10-02 常熟市九洲电器设备有限公司 一种电缆保护管

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1277377A (fr) * 1960-10-19 1961-12-01 Acome Câble électrique
DE2261530C3 (de) * 1972-12-15 1976-01-02 Fraenkische Isolierrohr- & Metallwaren-Werke, Gebr. Kirchner, 8729 Koenigsberg Isolierrohr aus Kunststoff
DE2526945A1 (de) * 1975-06-16 1976-12-23 Siemens Ag Starrer metallischer leiter, vorzugsweise rundleiter fuer hohe spannungen, mit feststoffisolation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014032657A1 (fr) * 2012-08-31 2014-03-06 Otto-Von-Guericke-Universität Magdeburg Dispositif pour conduire un courant sous haute tension et pour transmettre des données, et procédé de production correspondant

Also Published As

Publication number Publication date
DE3812456A1 (de) 1989-10-26
EP0337949A3 (en) 1990-04-25
DE58908298D1 (de) 1994-10-13
EP0337949B1 (fr) 1994-09-07
ATE111260T1 (de) 1994-09-15

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