GB388810A - Improvements relating to the protection of electric transformers - Google Patents
Improvements relating to the protection of electric transformersInfo
- Publication number
- GB388810A GB388810A GB2468831A GB2468831A GB388810A GB 388810 A GB388810 A GB 388810A GB 2468831 A GB2468831 A GB 2468831A GB 2468831 A GB2468831 A GB 2468831A GB 388810 A GB388810 A GB 388810A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- component
- current
- circuit
- class
- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/045—Differential protection of transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
388,810. Protective cut-out arrangements. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, WELLINGS, J. G., Ricky, London Road, Dunchurch, MAYO, C. G., 17, Alexandra Road, and' MATHEWS,. P., 7, Bilton Rise, all in Rugby. Sept. 2, 1931, No. 24688. [Class 38 (v).] In the protection of a power transformer 5 by means of a relay 1 connected across a circulating-current circuit- 2 .. 4, undesired operation of the relay 1 by the asymmetrical component of the magnetizing current when switching in the transformer 5, is prevented by shunting the relay 1 by a relay 6 which closes its contacts only in response to the asymmetric component. A condenser 9 prevents operation of the relay 1 by that component, and a choke 8 prevents operation of relay 6 by anything but that component. Modifications are described and illustrated employing (1) a wattmeter-type relay having its windings'connected across the circuit 2 through rectifiers, (2) a balanced-beam. relay, the restraining and operating windings of which are respectively energized by the asymmetric component and the normal out-ofbalance current and (3) a vibrating-reed relay connected across the circuit 2 and operating contacts on either side of its mean position only with a normal out-of-balance current. Specification 176,134, [Class 38 (v), Electric switches &c.], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2468831A GB388810A (en) | 1931-09-02 | 1931-09-02 | Improvements relating to the protection of electric transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2468831A GB388810A (en) | 1931-09-02 | 1931-09-02 | Improvements relating to the protection of electric transformers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB388810A true GB388810A (en) | 1933-03-02 |
Family
ID=10215709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2468831A Expired GB388810A (en) | 1931-09-02 | 1931-09-02 | Improvements relating to the protection of electric transformers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB388810A (en) |
-
1931
- 1931-09-02 GB GB2468831A patent/GB388810A/en not_active Expired
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