Circuit breaker having thermal and solid state trip means
US4038618A · kind A · utility
5Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1976 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Apr 12, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/124
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case multi-pole circuit breaker is provided with a solid state trip unit constructed to automatically open the breaker responsive to predetermined fault current conditions. In addition, a bimetal actuated device sensitive to air temperature within the breaker housing is provided for automatically opening the breaker when air temperature within the housing exceeds a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.