Static trip device comprising an earth protection desensitization system
US5164876A · kind A · utility
1Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1990 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jul 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/347
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The differential tripping threshold of the trip device is a polynomial function of an order greater than or equal to two of the highest phase current flowing in the power system protected by the circuit breaker comprising the trip device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.