GB418633A - Improvements in and relating to electric rectifier installations - Google Patents
Improvements in and relating to electric rectifier installationsInfo
- Publication number
- GB418633A GB418633A GB10239/34A GB1023934A GB418633A GB 418633 A GB418633 A GB 418633A GB 10239/34 A GB10239/34 A GB 10239/34A GB 1023934 A GB1023934 A GB 1023934A GB 418633 A GB418633 A GB 418633A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- rate
- load
- windings
- april
- 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)
- Emergency Protection Circuit Devices (AREA)
Abstract
418,633. Rectifying alternating current. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. April 4, 1934, No. 10239. Convention date, April 4, 1933. [Class 38 (ii).] In order to reduce the rate at which short circuit current builds up in rectifiers feeding load circuits having a small time constant, the anodes are subjected to grid control, and the phase of the voltage applied to the grids is retarded in dependence upon the rate of increase of current in the load circuit. In the arrangement shown, chokes 8, normally saturated by windings 8<1> fed with D.C. through a rectifier 9, are included in the supply to the grid transformer 10, and the degree of saturation is decreased in dependence upon the rate of increase of load current by current supplied to windings 8<11> from a current transformer 11 in the cathode lead. A choke may also be included in the cathode lead to assist in retarding the building up of short circuit current. The arrangement is described as particularly applicable to traction systems in which, due to the shortness of feeders on sections near to the substation, short circuits on such sections tend to cause simultaneous release of all the protective devices on the D.C. and A.C. sides and in the anode leads.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE418633X | 1933-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB418633A true GB418633A (en) | 1934-10-29 |
Family
ID=6448872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10239/34A Expired GB418633A (en) | 1933-04-04 | 1934-04-04 | Improvements in and relating to electric rectifier installations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB418633A (en) |
-
1934
- 1934-04-04 GB GB10239/34A patent/GB418633A/en not_active Expired
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