GB1129887A - Improvements in and relating to means for controlling dielectric stresses in electrical insulation - Google Patents
Improvements in and relating to means for controlling dielectric stresses in electrical insulationInfo
- Publication number
- GB1129887A GB1129887A GB5113464A GB5113464A GB1129887A GB 1129887 A GB1129887 A GB 1129887A GB 5113464 A GB5113464 A GB 5113464A GB 5113464 A GB5113464 A GB 5113464A GB 1129887 A GB1129887 A GB 1129887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- asbestos
- conductor
- insulation
- enclosure
- axis
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
1,129,887. Insulation for, and securing coils for, dynamo-electric machines. C. A. PAR- .SONS & CO. Ltd. 16 Dec., 1965 [16 Dec., 1964], No. 51134/64. Heading H2A. Means for controlling dielectric stresses in the insulation of a conductor where it emerges from an electrically-conducting enclosure comprises one or more separate capacitive and resistive members of electrically insulating material at least partially surrounding the conductor and its insulation and in electric contact with the enclosure, the material having a low specific impedance (as defined in the Specification) and the member(s) having an impedance normal to the conductor axis less than that parallel to the conductor axis. Preferred materials are synthetic-resin-impregnated asbestos cloth, asbestos felt, and asbestos paper laminates. Preferably the impedance of the member increases in a predetermined manner with distance from the enclosure. This may be achieved by making the member wedge-shaped (or annular-conical) with the greater cross-section next to the enclosure. 'The member is oriented with the laminations perpendicular to the conductor axis. Alternatively, a material may be used consisting of laminµ of asbestos fabric in which asbestos fibres rare interwoven with glass fibres; or linen, and in this case the member is cut from a block so that the laminµ are parallel to the conductor axis, but in each lamina the asbestos fibres lie perpendicular to the conductor axis while the remaining fibres lie parallel to the axis. In Figs. 5 and 6 the member 4 is arcuate and has slots 10 coinciding with the ends of slots in a turbo-generator stator (not shown) through which conductors emerge; it is held in contact with the stator end face by I section members provided on the latter, and engaged by keyways 12, Fig. 6, in the member 4. Each wedgeshaped portion of member 4, Fig. 6 (crosssection), co-operates with, and lies between, two conductors; the portion tapers in the direction away from the stator core and is separated from the conductors by insulation 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5113464A GB1129887A (en) | 1964-12-16 | 1964-12-16 | Improvements in and relating to means for controlling dielectric stresses in electrical insulation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5113464A GB1129887A (en) | 1964-12-16 | 1964-12-16 | Improvements in and relating to means for controlling dielectric stresses in electrical insulation |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1129887A true GB1129887A (en) | 1968-10-09 |
Family
ID=10458782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5113464A Expired GB1129887A (en) | 1964-12-16 | 1964-12-16 | Improvements in and relating to means for controlling dielectric stresses in electrical insulation |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1129887A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1164686A2 (en) * | 2000-05-29 | 2001-12-19 | ABB Industry Oy | A field compensation layer in a winding |
US20150381005A1 (en) * | 2013-02-25 | 2015-12-31 | Hitachi, Ltd. | Rotary Machine |
-
1964
- 1964-12-16 GB GB5113464A patent/GB1129887A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1164686A2 (en) * | 2000-05-29 | 2001-12-19 | ABB Industry Oy | A field compensation layer in a winding |
EP1164686A3 (en) * | 2000-05-29 | 2003-12-10 | ABB Industry Oy | A field compensation layer in a winding |
US20150381005A1 (en) * | 2013-02-25 | 2015-12-31 | Hitachi, Ltd. | Rotary Machine |
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