Multipole electrical circuit breaker with improved interchangeable trip units
US4276527A · kind A · utility
91Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1979 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | Jun 11, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/165
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case multi-pole circuit breaker comprises an interchangeable trip unit having a magnetic circuit surrounding a main stationary conductor and provided with a U-shaped core secured to circuit-breaker assembly and a magnetic rod fastener to the trip unit. The rod is inserted between the legs of the core, and a single turn secondary winding surrounds the rod. A bimetal is attached to the winding, and the thermal tripping characteristics are independent of the relative position of the magnetic core and rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.