Replaceable solid state trip unit
US4037183A · kind A · utility
15Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1976 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Mar 29, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/7409
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case multi-pole circuit breaker is provided with a removable and replaceable solid state trip unit constructed with all fault current detecting elements within a common housing. For each circuit breaker pole the trip unit includes an input and an output transformer feeding circuitry mounted on a board disposed within the common housing. The circuitry output is connected to operate a permanent magnet latch for release of a mechanical latch that normally holds the contact operating mechanism in a reset position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.