GB544838A - Improvements in and relating to methods of and means for protecting alternating current electric systems - Google Patents
Improvements in and relating to methods of and means for protecting alternating current electric systemsInfo
- Publication number
- GB544838A GB544838A GB7705/41A GB770541A GB544838A GB 544838 A GB544838 A GB 544838A GB 7705/41 A GB7705/41 A GB 7705/41A GB 770541 A GB770541 A GB 770541A GB 544838 A GB544838 A GB 544838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turns
- inductance
- june
- coil
- variable
- 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
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
544,838. Protective arrangements inductances. BRITISH THOMSON-HOUSTON CO., Ltd. June 18, 1941, No. 7705. Convention date, June 19, 1940. [Classes 38 (ii) and 38 (iv)] Neutral point arc suppressing means for ground faults on A.C. systems consist of two or more inductance coils, one 10 being variable as to turns in circuits and others 9, 90 being variable as to turns, capable of connection in parallel with the first to extend the variation of inductance available. Each coil is arranged to develop sufficient flux saturation to cause loss of resonance and so prevent high resonance voltages when the neutral becomes displaced. A tapping switch 11 varying the turns of the winding 10 operates a switch or switches, 38, 380 to effect the parallel connection or connections at a maximum inductance condition of the coil 10. The arrangement of two coils on a common core member 42 is such that with both in circuit a common magnetic circuit extends through both legs 43, 44 each of which has suitable air gaps 45.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US544838XA | 1940-06-19 | 1940-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB544838A true GB544838A (en) | 1942-04-29 |
Family
ID=21991398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7705/41A Expired GB544838A (en) | 1940-06-19 | 1941-06-18 | Improvements in and relating to methods of and means for protecting alternating current electric systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB544838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168209A (en) * | 1984-12-02 | 1986-06-11 | Wyzsza Szkola Morska | System for compensation of capacitive and active earth currents |
| WO2014021773A1 (en) | 2012-08-03 | 2014-02-06 | Swedish Neutral Ab | A device comprising a controllable earthing transformer |
| CN103647267A (en) * | 2013-11-15 | 2014-03-19 | 河北旭辉电气股份有限公司 | High-capacity double-adjustment turn-adjusting arc-extinguishing coil |
-
1941
- 1941-06-18 GB GB7705/41A patent/GB544838A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168209A (en) * | 1984-12-02 | 1986-06-11 | Wyzsza Szkola Morska | System for compensation of capacitive and active earth currents |
| WO2014021773A1 (en) | 2012-08-03 | 2014-02-06 | Swedish Neutral Ab | A device comprising a controllable earthing transformer |
| EP2880732A4 (en) * | 2012-08-03 | 2016-04-27 | Swedish Neutral Ab | A device comprising a controllable earthing transformer |
| CN103647267A (en) * | 2013-11-15 | 2014-03-19 | 河北旭辉电气股份有限公司 | High-capacity double-adjustment turn-adjusting arc-extinguishing coil |
| CN103647267B (en) * | 2013-11-15 | 2017-04-12 | 河北旭辉电气股份有限公司 | High-capacity double-adjustment turn-adjusting arc-extinguishing coil |
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