Detection of arcing faults in generator windings
US4156846A · kind A · utility
47Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1977 |
| Grant date | May 29, 1979 |
| Priority date | — |
| Expiry date | Jan 10, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for detecting the presence of arcing faults in the stator windings of large dynamoelectric machines, such as turbine generators. Arcing faults, such as broken strands in a winding conductor with continued arcing, give rise to high frequency currents which flow in the neutral lead of the generator winding. The presence of the arcing fault can thus be detected by observing the high frequency neutral currents and monitoring them for the presence of the characteristic frequency distribution resulting from the resonance characteristics of the current path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.