EP0001494A1 - Câbles électriques - Google Patents
Câbles électriques Download PDFInfo
- Publication number
- EP0001494A1 EP0001494A1 EP78300427A EP78300427A EP0001494A1 EP 0001494 A1 EP0001494 A1 EP 0001494A1 EP 78300427 A EP78300427 A EP 78300427A EP 78300427 A EP78300427 A EP 78300427A EP 0001494 A1 EP0001494 A1 EP 0001494A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon atoms
- benzene rings
- electric cable
- aryl alkane
- tapes
- 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.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/06—Gas-pressure cables; Oil-pressure cables; Cables for use in conduits under fluid pressure
- H01B9/0611—Oil-pressure cables
-
- 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
- H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
- H01B3/22—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils hydrocarbons
Definitions
- This invention relates to electric cables for service at very high voltages and incorporating alkene polymer film (especially polypropylene or high- density polyethylene) as part of the insulation.
- alkene polymer film especially polypropylene or high- density polyethylene
- Such film may, and preferably does, form part of a laminate having surface layers of cellulosic paper.
- the invention is characterised by the use of an insulating liquid comprising an aryl alkane having at least two separate (uncondensed) benzene rings and from one to six aliphatic non-cyclic'carbon atoms per benzene ring, one or more of which carbon atoms may be present in one or more hydrocarbon substituents in one or both of the benzene rings, the benzene rings or two of them being separated by not more than two aliphatic carbon atoms.
- an insulating liquid comprising an aryl alkane having at least two separate (uncondensed) benzene rings and from one to six aliphatic non-cyclic'carbon atoms per benzene ring, one or more of which carbon atoms may be present in one or more hydrocarbon substituents in one or both of the benzene rings, the benzene rings or two of them being separated by not more than two aliphatic carbon atoms.
- the aryl alkane has a viscosity less than 57 centistokes at 20°C and less than 11 centistokes at 60°C.
- the alkene polymer film it is very desirable, and may be essential if a sufficient control of swelling is to be obtained to allow winding and unwinding of the cable, for the alkene polymer film to be present solely as a laminate, preferably prestressed by extrusion bonding, having two layers of cellulosic paper forming the exposed surfaces of the laminate. This also assists in resisting degradation, if, under overvoltage conditions, electrical discharges should occur in the gaps between the edges of lapped tapes.
- the aryl alkane (or a mixture of aryl alkanes) may be used as the sole impregnant, or may be mixed with other suitable impregnants.
- they may be mixed with suitable mineral oils, preferably having a viscosity less than 57 centistokes at 20°C and less than 11 centistokes at 60°C, to reduce cost, or with diorganosiloxamer (silicone) oils, in accordance with our British patent no. 1515847, to improve swelling performance still further.
- Aryl alkanes that are already commercially available include:
- the alkene polymer film forms part of a laminate, it preferably constitutes at least half the thickness of the laminate, and the paper layers correspondingly not more than one quarter each.
- the total thickness will usually be in the range 50-250 micrometres.
- the paper layers are preferably of low density, to secure a low overall power factor and permittivity, but on the other hand, they should be of a fine and uniform structure with a high impermeability, preferably at least 10,000 Gurley seconds.
- the dielectric may consist of laminate tape, or it may include also a layer or layers of paper tape.
- Figure 1 is a cross-section of a cable
- Figure 2 is an enlarged detail of part of the dielectric.
- 1 indicates a steel tape helix defining a central oil duct within the metallic conductor 2.
- a bronze binder tape 3 Over the conductor is applied a bronze binder tape 3 and a conductor screen 4 formed of tapes metallised and/or loaded with conductive material.
- the dielectric is made up of: an inner layer 5 consisting of two paper tapes each 75 micrometres thick; a main body 6 and a thin outer layer 7 made up of two paper tapes each 100 micro-metres thick.
- the cable is completed by a semiconductive dielectric screen 8, conductive bedding tape 9 (made of copper wires and textile threads or glass fibres woven together), lead or aluminium sheath 10, bronze tape 11 or other pressure resisting reinforcement and a plastics oversheath 12.
- the dielectric is impregnated with 100% commercial PXE maintained at a minimum pressure of 20 kN/m 2 .
- the main dielectric body is made up of three parts, 6a, 6b and 6c, each of which is made up of a large number of extrusion-bonded laminate tapes each comprising a polypropylene layer sandwiched between and bonded to two paper tapes.
- the polypropylene layer is 50 micrometres thick and each paper layer 25 micrometres; in the middle part 6b the polypropylene layer 60 micrometres and each paper layer 30 micrometres; and in the outer part 6c the polypropylene layer 80 micrometres and each paper layer 40 micrometres.
- the parts 6a and 6b each have a radial thickness of 5mm; the outer part may have a radial thickness of 5mm to give a voltage rating of 400kV, or of 14mm to give a voltage rating of 750V.
- Figure 2 illustrates, for either of these cables, the layers of laminate tape, each tape comprising a centre layer 13 of polypropylene and outer layers 14 of paper. Butt spaces 15 between tape edges are filled with the PXE.
- Cables in accordance with the invention are useful in transmitting electrical energy in bulk at very high voltages.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4060877 | 1977-09-29 | ||
GB4060877 | 1977-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0001494A1 true EP0001494A1 (fr) | 1979-04-18 |
Family
ID=10415736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78300427A Withdrawn EP0001494A1 (fr) | 1977-09-29 | 1978-09-28 | Câbles électriques |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0001494A1 (fr) |
JP (1) | JPS5457689A (fr) |
IT (1) | IT1105990B (fr) |
NO (1) | NO783289L (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2485563A1 (fr) * | 1980-06-30 | 1981-12-31 | Nippon Petrochemicals Co Ltd | Huile isolante du point de vue electrique et appareils electriques en contenant |
DE3200954A1 (de) * | 1981-01-16 | 1982-09-02 | Società Cavi Pirelli S.p.A., 20123 Milano | Mit einem isolierenden medium impraegniertes elektrisches stromkabel |
EP0129755A1 (fr) * | 1983-06-09 | 1985-01-02 | Toray Industries, Inc. | Câble électrique de puissance |
EP0144149A1 (fr) * | 1983-11-01 | 1985-06-12 | Exxon Research And Engineering Company | Fluide diélectrique |
US4602121A (en) * | 1984-01-17 | 1986-07-22 | Societa' Cavi Pirelli S.P.A. | Oil-filled electric cable with alternate layers of plastic and paper tape insulation |
EP0295924A1 (fr) * | 1987-06-18 | 1988-12-21 | BICC Public Limited Company | Liquides isolants et câbles électriques |
EP0684614A1 (fr) | 1994-05-24 | 1995-11-29 | PIRELLI CAVI S.p.A. | Câble à haute tension |
WO2022065843A1 (fr) | 2020-09-25 | 2022-03-31 | 주식회사 엘지화학 | Polymère superabsorbant biodégradable et son procédé de préparation |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993156A (en) * | 1956-05-24 | 1961-07-18 | Sprague Electric Co | Capacitor dielectric |
GB896066A (en) * | 1959-08-21 | 1962-05-09 | Anaconda Wire & Cable Co | Improvements in insulating oils |
US3077510A (en) * | 1959-06-02 | 1963-02-12 | Anaconda Wire & Cable Co | High voltage power cable |
FR1367017A (fr) * | 1962-06-28 | 1964-07-17 | Ethyl Corp | Additif pour huiles et graisses industrielles |
FR2257131A2 (fr) * | 1974-01-08 | 1975-08-01 | British Insulated Callenders | |
FR2275860A1 (fr) * | 1974-06-20 | 1976-01-16 | Matsushita Electric Ind Co Ltd | Dispositif electrique impregne d'huile |
DE2540866A1 (de) * | 1974-09-13 | 1976-03-25 | British Insulated Callenders | Elektrisches kabel fuer hoechstspannungen |
FR2349929A1 (fr) * | 1976-05-01 | 1977-11-25 | Nippon Oil Co Ltd | Compositions a base d'huile isolante electrique |
FR2358237A1 (fr) * | 1976-07-16 | 1978-02-10 | British Petroleum Co | Composition fluide dielectrique pour travailler un metal par un procede d'electro-erosion |
-
1978
- 1978-09-27 IT IT51262/78A patent/IT1105990B/it active
- 1978-09-28 NO NO783289A patent/NO783289L/no unknown
- 1978-09-28 EP EP78300427A patent/EP0001494A1/fr not_active Withdrawn
- 1978-09-29 JP JP11939478A patent/JPS5457689A/ja active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993156A (en) * | 1956-05-24 | 1961-07-18 | Sprague Electric Co | Capacitor dielectric |
US3077510A (en) * | 1959-06-02 | 1963-02-12 | Anaconda Wire & Cable Co | High voltage power cable |
GB896066A (en) * | 1959-08-21 | 1962-05-09 | Anaconda Wire & Cable Co | Improvements in insulating oils |
FR1367017A (fr) * | 1962-06-28 | 1964-07-17 | Ethyl Corp | Additif pour huiles et graisses industrielles |
FR2257131A2 (fr) * | 1974-01-08 | 1975-08-01 | British Insulated Callenders | |
FR2275860A1 (fr) * | 1974-06-20 | 1976-01-16 | Matsushita Electric Ind Co Ltd | Dispositif electrique impregne d'huile |
DE2540866A1 (de) * | 1974-09-13 | 1976-03-25 | British Insulated Callenders | Elektrisches kabel fuer hoechstspannungen |
FR2349929A1 (fr) * | 1976-05-01 | 1977-11-25 | Nippon Oil Co Ltd | Compositions a base d'huile isolante electrique |
FR2358237A1 (fr) * | 1976-07-16 | 1978-02-10 | British Petroleum Co | Composition fluide dielectrique pour travailler un metal par un procede d'electro-erosion |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2485563A1 (fr) * | 1980-06-30 | 1981-12-31 | Nippon Petrochemicals Co Ltd | Huile isolante du point de vue electrique et appareils electriques en contenant |
DE3200954A1 (de) * | 1981-01-16 | 1982-09-02 | Società Cavi Pirelli S.p.A., 20123 Milano | Mit einem isolierenden medium impraegniertes elektrisches stromkabel |
US4556756A (en) * | 1981-01-16 | 1985-12-03 | Societa' Cavi Pirelli S.P.A. | Electric power cable impregnated with insulating fluid |
EP0129755A1 (fr) * | 1983-06-09 | 1985-01-02 | Toray Industries, Inc. | Câble électrique de puissance |
EP0144149A1 (fr) * | 1983-11-01 | 1985-06-12 | Exxon Research And Engineering Company | Fluide diélectrique |
US4613923A (en) * | 1983-11-01 | 1986-09-23 | Exxon Research & Engineering Co. | Dielectric fluid |
US4602121A (en) * | 1984-01-17 | 1986-07-22 | Societa' Cavi Pirelli S.P.A. | Oil-filled electric cable with alternate layers of plastic and paper tape insulation |
EP0295924A1 (fr) * | 1987-06-18 | 1988-12-21 | BICC Public Limited Company | Liquides isolants et câbles électriques |
US4967039A (en) * | 1987-06-18 | 1990-10-30 | Bicc Public Limited Company | Insulating liquids and electric cables |
EP0684614A1 (fr) | 1994-05-24 | 1995-11-29 | PIRELLI CAVI S.p.A. | Câble à haute tension |
WO2022065843A1 (fr) | 2020-09-25 | 2022-03-31 | 주식회사 엘지화학 | Polymère superabsorbant biodégradable et son procédé de préparation |
Also Published As
Publication number | Publication date |
---|---|
JPS5457689A (en) | 1979-05-09 |
NO783289L (no) | 1979-03-30 |
IT7851262A0 (it) | 1978-09-27 |
IT1105990B (it) | 1985-11-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): BE CH DE FR GB NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn | ||
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BOARDMAN, ARTHUR Inventor name: EDWARDS, DEREK REGINALD |