Circuit breaker having solid state and thermal-magnetic trip means
US4090156A · kind A · utility
13Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1976 |
| Grant date | May 16, 1978 |
| 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 by actuating a permanent magnet latch. The circuit breaker is also provided with a thermal-magnetic trip means that acts independently of the solid state trip unit to automatically open the breaker responsive to predetermined fault current conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.