GB938813A - Improvements in and relating to the insulation of oil-immersed electrical apparatus - Google Patents
Improvements in and relating to the insulation of oil-immersed electrical apparatusInfo
- Publication number
- GB938813A GB938813A GB908759A GB908759A GB938813A GB 938813 A GB938813 A GB 938813A GB 908759 A GB908759 A GB 908759A GB 908759 A GB908759 A GB 908759A GB 938813 A GB938813 A GB 938813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oil
- covering
- electrical apparatus
- march
- sold
- 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
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/30—Drying; Impregnating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Bodies (AREA)
- Organic Insulating Materials (AREA)
Abstract
938,813. Electric cables. ENGLISH ELECTRIC CO. Ltd. March 11, 1960 [March 16, 1959], No. 9087/59. Class 36. [Also in Group XXXV] The conductors of oil immersed electrical apparatus are covered by an oil-impregnated insulating covering (paper) having a greater affinity for water than for oil underneath which is a further covering of insulating material which, when impregnated with oil, is substantially impermeable to water and has a melting point in excess of 150‹ C. and a dielectric constant between 3.0 and 3.5. The inner insulating covering may be a three layer half lap wound covering of tape made from polyethylene terephthalate ester, sold as " Melinex " (Registered Trade Mark), 4,4<SP>1</SP>-dihydroxydiphenyl 2,2-propane polycarbonate, sold as " Makrofol " (Registered Trade Mark) or polyethylene which has been irradiated in excess of 40 megarads. The inner tape covering may be provided with roughened surfaces to facilitate the entry of oil.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB908759A GB938813A (en) | 1959-03-16 | 1959-03-16 | Improvements in and relating to the insulation of oil-immersed electrical apparatus |
| CH271660A CH366328A (en) | 1959-03-16 | 1960-03-10 | Electrical apparatus comprising conductors immersed in oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB908759A GB938813A (en) | 1959-03-16 | 1959-03-16 | Improvements in and relating to the insulation of oil-immersed electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB938813A true GB938813A (en) | 1963-10-09 |
Family
ID=9865106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB908759A Expired GB938813A (en) | 1959-03-16 | 1959-03-16 | Improvements in and relating to the insulation of oil-immersed electrical apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH366328A (en) |
| GB (1) | GB938813A (en) |
-
1959
- 1959-03-16 GB GB908759A patent/GB938813A/en not_active Expired
-
1960
- 1960-03-10 CH CH271660A patent/CH366328A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH366328A (en) | 1962-12-31 |
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