GB514890A - Improvements in and relating to electric transformer - Google Patents
Improvements in and relating to electric transformerInfo
- Publication number
- GB514890A GB514890A GB11404/38A GB1140438A GB514890A GB 514890 A GB514890 A GB 514890A GB 11404/38 A GB11404/38 A GB 11404/38A GB 1140438 A GB1140438 A GB 1140438A GB 514890 A GB514890 A GB 514890A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cores
- windings
- measuring instrument
- current
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
- G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
514,890. Current transformers. BRITISH THOMSON-HOUSTON CO., Ltd. April 13, 1938, No. 11404. Convention date, April 16, 1937. [Class 38 (ii)] [Also in Group XXXVI] In a D.C. measuring transformer comprising a pair of saturable cores. 1, 2 linked by a conductor 8 carrying the current to be measured and by a pair of series-connected windings 3 energized from an A.C. source U and connected in series with the measuring instrument Z, the cores are made of a material, such as a nickeliron alloy, the characteristic curve of which has a sharp saturation bend so that for all values of D.C. which cause saturation of the cores the current in the A.C. circuit. is 'caused to be substantially proportional to the D.C. To enable a D.C. measuring instrument to be employed, a full-wave rectifier may be included in the A.C. circuit, the measuring instrument being connected across its D.C. terminals, Fig. 1b (not shown). The A.C. windings may be subdivided into parallel-connected parts uniformly distributed round the cores, or equivalent arrangements of compensating windings may be employed. Specifications 399,611 and 460,708 are referred to. Reference has been directed by the Comptroller to Specification 460,708.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE514890X | 1937-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB514890A true GB514890A (en) | 1939-11-21 |
Family
ID=6548792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11404/38A Expired GB514890A (en) | 1937-04-16 | 1938-04-13 | Improvements in and relating to electric transformer |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB514890A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115561675A (en) * | 2022-08-24 | 2023-01-03 | 沭阳美星照明科技有限公司 | Electronic transformer loss detection method for lighting lamp |
-
1938
- 1938-04-13 GB GB11404/38A patent/GB514890A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115561675A (en) * | 2022-08-24 | 2023-01-03 | 沭阳美星照明科技有限公司 | Electronic transformer loss detection method for lighting lamp |
| CN115561675B (en) * | 2022-08-24 | 2023-10-10 | 沭阳美星照明科技有限公司 | Electronic transformer loss detection device for daylighting lamp and method thereof |
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