Tap changer condition diagnosing
US7089145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Feb 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/0061
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for condition diagnosing of a tap changer immersed in a cooling fluid, controlling and regulating an inductive power device, such as a transformer or reactor. The diagnosing method compares and evaluates expected heat exchanges between the tap changer and ambient air and the inductive power device, an expected amount of heat generated by the tap changer during operation, together with an actual temperature of the fluid. From the actual temperature, expected heat exchanges and expected generated heat, the heat balance in the system may be obtained and is used for disgnosing the operation conditions of the tap changer. The results from the condition diagnosing may be used as indicators that can alarm operators or may be sent as a data signal to remote and/or portable display means, such as a computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.