GB388414A - Improvements in or relating to protective arrangements for electric power supply systems or apparatus - Google Patents
Improvements in or relating to protective arrangements for electric power supply systems or apparatusInfo
- Publication number
- GB388414A GB388414A GB2032431A GB2032431A GB388414A GB 388414 A GB388414 A GB 388414A GB 2032431 A GB2032431 A GB 2032431A GB 2032431 A GB2032431 A GB 2032431A GB 388414 A GB388414 A GB 388414A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relays
- supplies
- restraining
- relay
- windings
- 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
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
Landscapes
- Ac-Ac Conversion (AREA)
Abstract
388,414. Protective cut-out systems. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and WILSON, W., c/o General Electric Co., Witton, Birmingham. July 15, 1931, No. 20324. [Class 38 (v).] A normally balanced threephase supply system or apparatus is isolated on fault by the action of one or more mechanically biased relays each of which is acted on differentially by the current of two of the phases. The relays may have time-delay features. As shown, the current transformer 15 in the phase 1 supplies the restraining winding 14 of a balanced-arm relay having a displaced fulcrum to afford the bias and an adjustable weight 11 to give variable restraint. The same transformer also supplies, in series with the restraining winding 14 of relay 4, the operating winding 13 of relay 5. The current transformer 16 similarly supplies the restraining and operating windings of relays 5, and 6 and the transformer 17 supplies the windings of 6 and 4. ' With a predetermined degree of unbalance between the phases, one or more of the relays closes contacts 10 to trip the main circuit-breakers. Induction type relays may be used instead of balanced-arm relays the two shaded pole electromagnets carrying the operating and restraining windings being disposed at unequal distances from the spindle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2032431A GB388414A (en) | 1931-07-15 | 1931-07-15 | Improvements in or relating to protective arrangements for electric power supply systems or apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2032431A GB388414A (en) | 1931-07-15 | 1931-07-15 | Improvements in or relating to protective arrangements for electric power supply systems or apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB388414A true GB388414A (en) | 1933-02-15 |
Family
ID=10144085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2032431A Expired GB388414A (en) | 1931-07-15 | 1931-07-15 | Improvements in or relating to protective arrangements for electric power supply systems or apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB388414A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756026A (en) * | 2019-03-29 | 2020-10-09 | 中国能源建设集团江苏省电力设计院有限公司 | Transformer direct-current magnetic bias suppression method based on multiple soil models |
-
1931
- 1931-07-15 GB GB2032431A patent/GB388414A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756026A (en) * | 2019-03-29 | 2020-10-09 | 中国能源建设集团江苏省电力设计院有限公司 | Transformer direct-current magnetic bias suppression method based on multiple soil models |
| CN111756026B (en) * | 2019-03-29 | 2024-04-12 | 中国能源建设集团江苏省电力设计院有限公司 | Transformer direct-current magnetic bias suppression method based on multiple soil models |
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