GB288735A - Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatus - Google Patents
Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatusInfo
- Publication number
- GB288735A GB288735A GB137927A GB137927A GB288735A GB 288735 A GB288735 A GB 288735A GB 137927 A GB137927 A GB 137927A GB 137927 A GB137927 A GB 137927A GB 288735 A GB288735 A GB 288735A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- oil
- thermometer
- transformer
- subjected
- 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
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
288,735. Norris, E. D. T., and Ferranti, Ltd. Jan. 17, 1927. Right to Patent relinquished. Thermometers.-Apparatus for measuring the highest temperature in an electrical apparatus, particularly in an oil-immersed transformer, comprises a thermometer subjected to the highest temperature of the surrounding fluid and means for adding to this temperature a value corresponding to the winding temperature-gradient, this value being taken to be proportional to the square of the load current. In the form shown, the thermometer 2, subjected to the highest temperature of the oil surrounding the transformer 1, is further heated by a resistance coil 4 connected to the secondary of a transformer 5 the primary of which is excited in accordance with the load current. The total rise of temperature of the thermometer is shown by an indicator 3 having a pointer 7 moving over a scale 13 which may be graduated in percentages of maximum safe load. The pointer carries a contact 8 co-operating with a fixed contact 9 to close an alarm or relay circuit 6. To compensate, for variations in atmospheric temperature the scale may be pivoted at 11 and adapted to be displaced about the pivot either automatically or by a knob 12 when such variations occur. In a modifica. tion the winding temperature-gradient may be indicated by an ammeter movement applied with current from the secondary of a transformer as above, the reading of the ammeter being mechanically added to that of the thermometer subjected to the highest temperature in the oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB137927A GB288735A (en) | 1927-01-17 | 1927-01-17 | Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB137927A GB288735A (en) | 1927-01-17 | 1927-01-17 | Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB288735A true GB288735A (en) | 1928-04-17 |
Family
ID=9720985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB137927A Expired GB288735A (en) | 1927-01-17 | 1927-01-17 | Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB288735A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999059A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | GPRS-based (general packet radio service) transformer oil temperature monitoring system |
| CN108917981A (en) * | 2018-06-20 | 2018-11-30 | 国网天津市电力公司电力科学研究院 | A kind of non-intrusion type winding temperature measurement method of oil pie winding transformer |
| CN109029780A (en) * | 2018-06-20 | 2018-12-18 | 国网天津市电力公司电力科学研究院 | A kind of non-intrusion type winding temperature measurement method of oil pie winding transformer |
| CN109239479A (en) * | 2018-07-17 | 2019-01-18 | 浙江华电器材检测研究所有限公司 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
| CN110543197A (en) * | 2018-12-05 | 2019-12-06 | 中车长春轨道客车股份有限公司 | Method and device for controlling operation of train main transformer |
-
1927
- 1927-01-17 GB GB137927A patent/GB288735A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999059A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | GPRS-based (general packet radio service) transformer oil temperature monitoring system |
| CN108917981A (en) * | 2018-06-20 | 2018-11-30 | 国网天津市电力公司电力科学研究院 | A kind of non-intrusion type winding temperature measurement method of oil pie winding transformer |
| CN109029780A (en) * | 2018-06-20 | 2018-12-18 | 国网天津市电力公司电力科学研究院 | A kind of non-intrusion type winding temperature measurement method of oil pie winding transformer |
| CN108917981B (en) * | 2018-06-20 | 2020-03-24 | 国网天津市电力公司电力科学研究院 | Non-invasive winding temperature measurement method for oil-immersed self-cooling cake type winding transformer |
| CN109029780B (en) * | 2018-06-20 | 2020-06-02 | 国网天津市电力公司电力科学研究院 | Non-invasive winding temperature measurement method for oil-immersed air-cooled pancake winding transformer |
| CN109239479A (en) * | 2018-07-17 | 2019-01-18 | 浙江华电器材检测研究所有限公司 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
| CN110543197A (en) * | 2018-12-05 | 2019-12-06 | 中车长春轨道客车股份有限公司 | Method and device for controlling operation of train main transformer |
| CN110543197B (en) * | 2018-12-05 | 2021-04-02 | 中车长春轨道客车股份有限公司 | Method and device for controlling operation of train main transformer |
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