Transformer hot-spot temperature monitor
US4623265A · kind A · utility
15Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1984 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Sep 26, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/026
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hot-spot temperature monitor for determining the hot-spot temperature of a transformer. The hot-spot temperature monitor determines the largest current flowing in the transformer and using this value calculates a temperature gradient. The temperature gradient represents the difference in temperature between the hot spot and the top-oil temperature. The top-oil temperature is also measured. The hot-spot temperature is calculated by adding the temperature gradient to the top-oil temperature. The hot-spot temperature sensor controls the transformer cooling units and can activate various alarms and indicators as desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.