Tap changing assembly for power transformer
US6965217B2 · kind B2 · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2004 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Feb 27, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/0061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tap changing assembly for power transformers having vacuum interrupters each of which is associated with a radio interrogated surface wave sensor capable of detecting whether the respective vacuum interrupter opens circuit in a timely manner. The sensors are interrogated by an interrogating unit transmitting high-frequency signals to the sensors and associated with a monitoring circuit responsive to signals received by the interrogating unit for signalling the status of the vacuum interrupter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.