Digital protective relay system
US6678134B2 · kind B2 · utility
26Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jun 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital protective relay system is capable of making sampling timing the same among plural protective relay device which operate independent from each other by using a signal from a GPS satellite. The sampling timing is made the same regardless of the time lag from which it is sent downstream with the concomitant transmission delay time in the case of data communications, or regardless of the time lag from which it is sent upstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.