Transformer fault analyzer
US5396172A · kind A · utility
26Cited by
13References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Jul 20, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transformer fault analyzer provides on site fault analysis of electrical distribution transformers, relying on patterns of parameter variation in transformer winding ratios, winding resistance and magnetizing impedance, and comparison of these parameters to predetermined values. In a preferred embodiment the analysis considers transformer ratio balance and magnetizing impedance balance. The transformer analyzer may be used with the transformer under load or no load conditions, and thus can be used to test transformers in the field as well as surplus or refurbished transformers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.