GB198714A - Improvements in or relating to electric transformers - Google Patents
Improvements in or relating to electric transformersInfo
- Publication number
- GB198714A GB198714A GB3316021A GB3316021A GB198714A GB 198714 A GB198714 A GB 198714A GB 3316021 A GB3316021 A GB 3316021A GB 3316021 A GB3316021 A GB 3316021A GB 198714 A GB198714 A GB 198714A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- current
- arrangement
- circuit
- secondary winding
- 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
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Transformers (AREA)
Abstract
198,714. Vedovelli, E. Dec. 9, 1921. Regulating transformers.-A relay 4 is included in the secondary circuit 3 of a current transformer, and is caused to operate at any desired value of the current in the primary circuit 2 by means of an adjustable magnetic shunt 7. The secondary winding may also be provided with tappings for connecting to the relay. Auxiliary windings, normally opposing each other, may be wound on the limbs of the magnetic circuit between the shunt 7 and the secondary winding, the arrangement being such that if one of these windings is short-circuited, the current in the other creates a large flux through the secondary winding and causes instantaneous operation of the relay. An arrangement for producing successive operation of a series of relays 24, 29. 30, placed at different points of a network supplied from a source 23, is shown in Fig. 4. In this arrangement, if a short-circuit occurs at the point 22, the relay 24 is the first to operate, but if the fault occurs between the points 19, 20 or 20, 21 one of the auxiliary windings 25, 27 on the transformers 20<1>, 21<1> ceases to carry current, while an excessive current flows through the remaining winding 26 or 28 and causes instantaneous operation of the relay 29 or 30. Specifications 5621/89, 136/05, 21357/09. and 2786/15 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3316021A GB198714A (en) | 1921-12-09 | 1921-12-09 | Improvements in or relating to electric transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3316021A GB198714A (en) | 1921-12-09 | 1921-12-09 | Improvements in or relating to electric transformers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB198714A true GB198714A (en) | 1923-06-11 |
Family
ID=10349310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3316021A Expired GB198714A (en) | 1921-12-09 | 1921-12-09 | Improvements in or relating to electric transformers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB198714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984004849A1 (en) * | 1983-05-24 | 1984-12-06 | Landis & Gyr Ag | Active current transformer |
-
1921
- 1921-12-09 GB GB3316021A patent/GB198714A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984004849A1 (en) * | 1983-05-24 | 1984-12-06 | Landis & Gyr Ag | Active current transformer |
| US4629974A (en) * | 1983-05-24 | 1986-12-16 | Lgz Landis & Gyr Zug Ag | Active current transformer |
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