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 PDFInfo
- 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
Links
Images
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)
- Organic Insulating Materials (AREA)
- Communication Cables (AREA)
- Manufacturing Of Electrical Connectors (AREA)
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)
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)
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 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1277377A (fr) * | 1960-10-19 | 1961-12-01 | Acome | Câble électrique |
DE2261530A1 (de) * | 1972-12-15 | 1974-07-04 | Fraenk Isolierrohr & Metall | Isolierrohr aus kunststoff |
FR2315153A1 (fr) * | 1975-06-16 | 1977-01-14 | Siemens Ag | Conducteur metallique rigide, en particulier, conducteur rond pour de hautes tensions, pourvu d'un isolant de matiere solide |
-
1988
- 1988-04-14 DE DE3812456A patent/DE3812456A1/de not_active Withdrawn
-
1989
- 1989-04-06 EP EP89810261A patent/EP0337949B1/fr not_active Expired - Lifetime
- 1989-04-06 DE DE58908298T patent/DE58908298D1/de not_active Expired - Fee Related
- 1989-04-06 AT AT89810261T patent/ATE111260T1/de not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1277377A (fr) * | 1960-10-19 | 1961-12-01 | Acome | Câble électrique |
DE2261530A1 (de) * | 1972-12-15 | 1974-07-04 | Fraenk Isolierrohr & Metall | Isolierrohr aus kunststoff |
FR2315153A1 (fr) * | 1975-06-16 | 1977-01-14 | Siemens Ag | Conducteur metallique rigide, en particulier, conducteur rond pour de hautes tensions, pourvu d'un isolant de matiere solide |
Non-Patent Citations (1)
Title |
---|
ELECTRICAL INSULATING MATERIALS AND THEIR APPLICATION, SILLARS R.W., PUBL. PETER PEREGRINNS, GROSSBRITANNIEN. 1978 * |
Cited By (1)
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 |
---|---|
ATE111260T1 (de) | 1994-09-15 |
EP0337949A3 (en) | 1990-04-25 |
DE3812456A1 (de) | 1989-10-26 |
DE58908298D1 (de) | 1994-10-13 |
EP0337949B1 (fr) | 1994-09-07 |
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