Circuit interrupter with solid state digital trip unit and positive power-up feature
US4377836A · kind A · utility
35Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1980 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Apr 15, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/0935
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit interrupter includes a microcomputer controlled trip unit having a front panel numeric display and a plurality of LED displays for providing post tripping indication of cause-of-trip and trip current value. Reliable operation is provided during power up conditions. Means are also provided for accurate performance of long delay and ground fault tripping operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.