Magnetic circuit interrupter with current limiting capability
US8749329B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2012 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Apr 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit interrupter has a first contact, a second contact, and a trip arm which moves the second contact between a closed position where the second contact is touching the first contact and an open position in which the second contact is spaced apart from the first contact. A first trip mechanism has a first solenoid, a first overcurrent sensor, and a first arm. A second trip mechanism has a second solenoid, a second overcurrent sensor, and a second arm. The first trip mechanism activates the first arm after a first threshold amount of time which actuates the trip arm when the first overcurrent sensor detects a first threshold level. The second trip mechanism activates the second arm after a second threshold amount of time which actuates the trip arm when the second overcurrent sensor detects a second threshold level, the second threshold level being different than the first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.