GB946075A - Means for protecting transformers and other electrical equipment - Google Patents
Means for protecting transformers and other electrical equipmentInfo
- Publication number
- GB946075A GB946075A GB1549760A GB1549760A GB946075A GB 946075 A GB946075 A GB 946075A GB 1549760 A GB1549760 A GB 1549760A GB 1549760 A GB1549760 A GB 1549760A GB 946075 A GB946075 A GB 946075A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- transformers
- disc
- electrical equipment
- acting
- 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
Abstract
946,075. Induction relays; protective cut-out systems. CHAMBERLAIN & HOOKHAM Ltd. April 21, 1961 [May 3, 1960], No. 15497/60. Headings H2B and H2K. A protective system for transformers or other electrical equipment includes an induction relay having at least one conducting disc driven by three flux producing elements which are current transformers one of which drives the disc in the reverse direction in response to second or other harmonic currents which may be due to switching surges. As shown in Fig. 1 a transformer 10 is provided with a circulating current protective system including current transformers 11, 12, series winding 13 and windings 14, 15 across points 18, 20 which are at equal potential under healthy circuit conditions. As shown in Fig. 2 three discs 21, 22, 23 are secured to a common spindle, winding 13 acting as a bias winding, winding 14 acting as an operating winding and winding 15 as an harmonic responsive bias winding having a capacitor 27 in series with its secondary coils 25, 26. All three flux producing elements may act on a single disc (Fig. 3, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1549760A GB946075A (en) | 1960-05-03 | 1960-05-03 | Means for protecting transformers and other electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1549760A GB946075A (en) | 1960-05-03 | 1960-05-03 | Means for protecting transformers and other electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB946075A true GB946075A (en) | 1964-01-08 |
Family
ID=10060163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1549760A Expired GB946075A (en) | 1960-05-03 | 1960-05-03 | Means for protecting transformers and other electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB946075A (en) |
-
1960
- 1960-05-03 GB GB1549760A patent/GB946075A/en not_active Expired
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