Relay device
US4370571A · kind A · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1980 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Jan 4, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A relay device is disclosed which protects and controls an electric power line by detecting an electrical quantity carried by the electric power line. The relay device includes a rectifying circuit connected to the electric power line. The output of the rectifying circuit is supplied to a peak value holding circuit which stores the peak value of the output of the rectifying device during each predetermined period under control of a resetting pulse. The output of the peak value holding circuit is supplied to a detecting circuit having a predetermined threshold level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.