GB491845A - Improvements in and relating to electric transformers - Google Patents
Improvements in and relating to electric transformersInfo
- Publication number
- GB491845A GB491845A GB622537A GB622537A GB491845A GB 491845 A GB491845 A GB 491845A GB 622537 A GB622537 A GB 622537A GB 622537 A GB622537 A GB 622537A GB 491845 A GB491845 A GB 491845A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shields
- shield
- winding
- arranged around
- high voltage
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/343—Preventing or reducing surge voltages; oscillations
- H01F27/345—Preventing or reducing surge voltages; oscillations using auxiliary conductors
Abstract
491,845. Transformers &c. BRITISH THOMSON-HOUSTON CO., Ltd. (General ElectricCo.) March 2, 1937, No. 6225. [Class 38 (ii)] In order to reduce transient voltage gradients in inductive windings such as transformer and reactor windings, an electrostatic shield is arranged around a part of the winding adjacent the high voltage terminal and a further shield or shields is or are arranged around other parts of the winding, the first shield being connected to the high voltage terminal and the additional shields being each connected to a part of the winding under the adjacent shield nearer to the high voltage terminal. The shields may be in the form of a metallic strip, a conducting coating applied to an insulating former, or a non- inductive loop of conductor as shown in Fig. 5a. Each shield may be electrically continuous or it may comprise a series of conductive elements A, B, or C, Fig. 4a electrically connected together, the several series being electrically connected to the winding sections F as shown. Auxiliary shields D may be arranged around the shields A and connected to the shields B. The shields may be held in position on the windings by rods engaging spacers extending radially outwards from between the coil sections, Fig. 9 (not shown). Specifications 173,606, [Class 38 (ii)], and 350,520, are referred to. Reference has been directed by the Comptroller to Specification 402,084.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB622537A GB491845A (en) | 1937-03-02 | 1937-03-02 | Improvements in and relating to electric transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB622537A GB491845A (en) | 1937-03-02 | 1937-03-02 | Improvements in and relating to electric transformers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB491845A true GB491845A (en) | 1938-09-02 |
Family
ID=9810677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB622537A Expired GB491845A (en) | 1937-03-02 | 1937-03-02 | Improvements in and relating to electric transformers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB491845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326181A (en) * | 1977-11-18 | 1982-04-20 | General Electric Company | High voltage winding for dry type transformer |
| CN113241241A (en) * | 2021-05-07 | 2021-08-10 | 湖南银河电气有限公司 | Active electric shielding device for coil winding |
-
1937
- 1937-03-02 GB GB622537A patent/GB491845A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326181A (en) * | 1977-11-18 | 1982-04-20 | General Electric Company | High voltage winding for dry type transformer |
| CN113241241A (en) * | 2021-05-07 | 2021-08-10 | 湖南银河电气有限公司 | Active electric shielding device for coil winding |
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