Augmentation of ambient temperature and free convection effects in thermal circuit breaker trip curve approximations
US7869178B2 · kind B2 · utility
2Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2007 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Jun 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/222
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical overload protection system may be based on a solid state control system. A solid state switch may open responsively to commands for a solid-state controller. The controller may perform calculations to determine accumulated energy in a protected conductor. The calculations may be based, in part, on samplings of current in the protected conductor and ambient temperature to which the conductor may be exposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.