GB675225A - Improvements in electric cables - Google Patents
Improvements in electric cablesInfo
- Publication number
- GB675225A GB675225A GB2633349A GB2633349A GB675225A GB 675225 A GB675225 A GB 675225A GB 2633349 A GB2633349 A GB 2633349A GB 2633349 A GB2633349 A GB 2633349A GB 675225 A GB675225 A GB 675225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- paper
- cable
- thickness
- mils
- polystyrene
- 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.)
- Expired
Links
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
- H01B7/02—Disposition of insulation
- H01B7/0241—Disposition of insulation comprising one or more helical wrapped layers of insulation
Landscapes
- Insulated Conductors (AREA)
Abstract
675,225. Compound-filled cables. GLOVER & CO., Ltd., W. T. Oct. 12, 1950 [Oct. 5, 1949], No. 26333/49. Addition to 625,512. Class 36. A super-tension cable is provided with a lapped dielectric consisting of an inner part 3 built up of not less than fourteen layers of orientated polystyrene film and an outer part of of pre-impregnated paper, the interstices of both parts being filled with an insulating compound which does not flow within the working range of the cable, and the inner part having a wall thickness lying within a range whose lower limit is equal to 10 per cent of the radius of the conductor surface and whose upper limit amounts to 45 per cent of the radial wall thickness of the whole dielectric. The inner part 3 of the insulation may consist of alternate layers of polystyrene film and paper, the thickness of both the polystyrene and the paper being about 3.5 mils. Alternatively the paper may have a thickness of 2.5 mils. and the polystyrene a thickness of 4 mils. The impregnating compound may consist of resinous compounds, petroleum jellies and similar materials having a set point of about 60 ‹ C. or higher, depending on the working range of the cable. The cable preferably comprises a conductor 1, a metallized paper screen 2, dielectric 3, 4, a copper screening tape 5, a lead or aluminium sheath 6 and a protective covering 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2633349A GB675225A (en) | 1949-10-05 | 1949-10-05 | Improvements in electric cables |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2633349A GB675225A (en) | 1949-10-05 | 1949-10-05 | Improvements in electric cables |
Publications (1)
Publication Number | Publication Date |
---|---|
GB675225A true GB675225A (en) | 1952-07-09 |
Family
ID=10242023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2633349A Expired GB675225A (en) | 1949-10-05 | 1949-10-05 | Improvements in electric cables |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB675225A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2558294A1 (en) * | 1984-01-17 | 1985-07-19 | Pirelli Cavi Spa | ELECTRICAL CABLE WITH INSULATING FLUID OIL |
-
1949
- 1949-10-05 GB GB2633349A patent/GB675225A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2558294A1 (en) * | 1984-01-17 | 1985-07-19 | Pirelli Cavi Spa | ELECTRICAL CABLE WITH INSULATING FLUID OIL |
GB2153132A (en) * | 1984-01-17 | 1985-08-14 | Pirelli Cavi Spa | Oil-filled cable |
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