Method and apparatus for diagnosing oil-filled electric apparatus
US4502320A · kind A · utility
14Cited by
3References
25Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 20, 1982 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Jul 20, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/1281
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for diagnosing abnormality of an oil-filled electric apparatus is disclosed. Presence or absence of abnormality is determined by comparing contents of plural predetermined components contained in gas extracted from the oil of the electric apparatus with respective predetermined reference values. The type of abnormality is determined on the basis of at least one set of two specific components selected from the plural components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.