GB193434A - Improvements in and relating to differentially acting electroresponsive apparatus - Google Patents
Improvements in and relating to differentially acting electroresponsive apparatusInfo
- Publication number
- GB193434A GB193434A GB2224521A GB2224521A GB193434A GB 193434 A GB193434 A GB 193434A GB 2224521 A GB2224521 A GB 2224521A GB 2224521 A GB2224521 A GB 2224521A GB 193434 A GB193434 A GB 193434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- primary
- winding
- restraining
- windings
- current
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/14—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for differential operation of the relay
Abstract
193,434. British Thomson - Houston Co., Ltd., and Fitzgerald, A. S. Aug. 22, 1921. Protective arrangements.-In an alternating current protective arrangement, a static transformer is employed having primary and secondary windings and also a third or restraining winding not inductively related to the primary and secondary windings, but adapted to receive current which regulates the flux set up by the primary winding and interlinked with the secondary, so controlling the induced secondary current which passes through a relay. In the form shown in Fig. 1, the primary and secondary windings 2, 3 are wound on the inner limb of the core 1, two sections of the restraining winding 4 being wound on the outer limbs. The flux produced by the current in the coil 4 follows the dotted path, and although not being interlinked with the primary or secondary windings, yet by saturating or partially saturating the magnetic circuit of these windings regulates the effective primary flux, cutting the secondary turns. In Fig. 4 the restraining winding is on the inner limb, which is provided with an air gap, the divided primary and secondary windings being arranged so that the electromotive forces in their sections produced by current in the restraining winding 4 are equal and opposing. As applied to the protection of an electric circuit or winding 8, the circulating current provided by series transformers 9, 10 passes through the restraining winding 4, the primary winding 1 being connected between equipotential points as shown, and the secondary winding supplying a relay 7. In a further alternative, Fig. 3, two cores are employed and two restraining windings 4, 5 arranged so as to be non- inductive with each other and with the primary and secondary windings 2, 3. This arrangement may be used with the system shown in Fig. 2 of Specification 188,001, the restraining windings being supplied by line fault currents and earth fault currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2224521A GB193434A (en) | 1921-08-22 | 1921-08-22 | Improvements in and relating to differentially acting electroresponsive apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2224521A GB193434A (en) | 1921-08-22 | 1921-08-22 | Improvements in and relating to differentially acting electroresponsive apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB193434A true GB193434A (en) | 1923-02-22 |
Family
ID=10176245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2224521A Expired GB193434A (en) | 1921-08-22 | 1921-08-22 | Improvements in and relating to differentially acting electroresponsive apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB193434A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4156222A (en) * | 1971-05-05 | 1979-05-22 | Commerzstahl Handelsgesellschaft Mbh | Transformer with divided primary |
-
1921
- 1921-08-22 GB GB2224521A patent/GB193434A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4156222A (en) * | 1971-05-05 | 1979-05-22 | Commerzstahl Handelsgesellschaft Mbh | Transformer with divided primary |
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