GB216254A - Improvements in and relating to protective apparatus for alternating electric current systems - Google Patents
Improvements in and relating to protective apparatus for alternating electric current systemsInfo
- Publication number
- GB216254A GB216254A GB754723A GB754723A GB216254A GB 216254 A GB216254 A GB 216254A GB 754723 A GB754723 A GB 754723A GB 754723 A GB754723 A GB 754723A GB 216254 A GB216254 A GB 216254A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- windings
- restraining
- portions
- core
- 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
- H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
Abstract
216,254. British Thomson-Houston Co., Ltd., and Fitzgerald, A. S. March 15, 1923. Addition to 193,434. Cut-out arrangements.-In protective arrangements for alternating current systems and apparatus employing a biassing transformer with operating and secondary windings inductively related to one another and a restraining winding not inductively related to the other two windings, as described in the parent Specification, the operating, secondary and restraining windings are each divided and equal portions of each are mounted on each of two core parts constituting the magnetic structure. In the form shown in Fig. 1, in which a single three-limbed core which may have an air-gap, is employed, the outer limbs are wound with one half of each of the three windings 2, 3, 4. The portions of the restraining winding 4 on each core are reversely connected to one another so that the winding as a whole is not inductively related to the other windings. In order to control the effect of the restraining winding when conditions are normal, a variable or fixed resistance is connected in shunt with the winding or an additional short-circuited winding 17, inductively related to the restraining winding and provided with a fixed or variable resistance 16, may be divided between the cores. These means for controlling the effect of the restraining winding give the same advantages as if there were an air gap in the magnetic circuit. The biassing transformer may comprise two separate ring cores 5, 6, Fig. 2, upon each of which are arranged equal portions of the three windings, the portions of the restraining winding on each core being reversely connected and the portions of the other two windings being connected in the same sense. The arrangement is shown with a variable resistance connected in shunt with the restraining winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB754723A GB216254A (en) | 1923-03-15 | 1923-03-15 | Improvements in and relating to protective apparatus for alternating electric current systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB754723A GB216254A (en) | 1923-03-15 | 1923-03-15 | Improvements in and relating to protective apparatus for alternating electric current systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB216254A true GB216254A (en) | 1924-05-29 |
Family
ID=9835216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB754723A Expired GB216254A (en) | 1923-03-15 | 1923-03-15 | Improvements in and relating to protective apparatus for alternating electric current systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB216254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468674B2 (en) | 1999-10-07 | 2002-10-22 | Bethlehem Steel Corporation | Coating composition for steel—product, a coated steel product, and a steel product coating method |
| US9620280B2 (en) | 2014-01-06 | 2017-04-11 | William Alek | Energy management system |
-
1923
- 1923-03-15 GB GB754723A patent/GB216254A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468674B2 (en) | 1999-10-07 | 2002-10-22 | Bethlehem Steel Corporation | Coating composition for steel—product, a coated steel product, and a steel product coating method |
| US9620280B2 (en) | 2014-01-06 | 2017-04-11 | William Alek | Energy management system |
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