Method and apparatus for detecting abnormal conditions of circuit breakers
US4433293A · kind A · utility
8Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Mar 20, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H11/0062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Abnormal conditions of a tank type gas circuit breaker are detected by driving a movable contact with a drive force and at a speed respectively lower than normal drive force and speed. Measuring units are mounted on various portions of a casing of the circuit breaker without disassembling the same and measured data are displayed for comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.