GB554224A - Improvements in or relating to electric current conversion systems - Google Patents
Improvements in or relating to electric current conversion systemsInfo
- Publication number
- GB554224A GB554224A GB16430/42A GB1643042A GB554224A GB 554224 A GB554224 A GB 554224A GB 16430/42 A GB16430/42 A GB 16430/42A GB 1643042 A GB1643042 A GB 1643042A GB 554224 A GB554224 A GB 554224A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- relay
- opening
- rectifier
- nov
- 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
- H02H7/10—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 converters; for rectifiers
- H02H7/12—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 converters; for rectifiers for static converters or rectifiers
- H02H7/125—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 converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/127—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 converters; for rectifiers for static converters or rectifiers for rectifiers having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
554,224. Converting. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Nov. 20, 1942, No. 16430. Convention date, Nov. 26, 1941. [Class 38 (ii)] In a polyphase converter comprising valves 3a of the immersion ignitor type and wherein ignition impulses are applied to the electrodes 16 through a wave-distorting network 32, 33, 34 and transformer 30, and pick-up potentials are applied to anode shields 17 from a transformer 20, a source of negative bias, such as rectifier 40, is inserted between the star-point of the transformer 20 and the cathodes of the valves, and a reverse current relay 45 is provided on the D.C. side which relay on the occurrence of a back-fire operates to de-energize transformers 20 and 30 by opening contacts 49. Thus the ignition electrodes are de-energized and the anode shields are left under negative bias from rectifier 40, feedback to the back-firing valve being prevented by opening of a high-speed relay 72. Similar protection is afforded under over-load conditions by opening of contacts 56 by operation of an overcurrent relay by current transformers 57 on the primary side of the main transformer 12.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US554224XA | 1941-11-26 | 1941-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB554224A true GB554224A (en) | 1943-06-24 |
Family
ID=21997685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16430/42A Expired GB554224A (en) | 1941-11-26 | 1942-11-20 | Improvements in or relating to electric current conversion systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB554224A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443728A (en) * | 1943-02-25 | 1948-06-22 | Gen Electric | Luminescent materials |
-
1942
- 1942-11-20 GB GB16430/42A patent/GB554224A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443728A (en) * | 1943-02-25 | 1948-06-22 | Gen Electric | Luminescent materials |
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