Insulation of non-liquid immersed transformers
US11335498B2 · kind B2 · utility
0Cited by
6References
17Claims
0Family size
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Key dates
| Filing date | Feb 14, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Feb 14, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/328
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Non-liquid immersed transformers and methods of measuring aging degree of the transformers' insulation are disclosed. The transformers comprise a solid insulation inside the conductive coil and one or more floating electrodes in the solid insulation. At least a part of the conductive coil and the one or more floating electrodes may form one or more capacitive elements, respectively. An electrical parameter, e.g. complex permittivity, of the capacitive element is measured and the aging degree is calculated as a function of the electrical parameter measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.