Molded case circuit breaker with improved interrupting capacity
US4011420A · kind A · utility
9Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1975 |
| Grant date | Mar 8, 1977 |
| Priority date | — |
| Expiry date | Jan 22, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H73/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case circuit breaker of relatively narrow width is afforded dramatically increased current interrupting capacity by providing shielding against the electromagnetic field developed as the result of short circuits flowing through a contiguous circuit breaker. Additionally, an arc runner is added to cooperate with an improved arc chute construction in controlling to extinction the arc developed incident to an interruption. The case is also vented to relieve the internal gas pressure during arcing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.