Protective relaying system
US4420805A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1981 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Feb 20, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective relaying system is disclosed which includes a selection circuit for receiving a plurality of input signals from a power system and for selecting one of the input signals to provide a selected input signal. The system also includes a comparison circuit connected to the selection circuit for receiving the selected input signal, comparing the selected input signal with a predetermined reference signal, and producing a decision signal according to the result of the comparison. The system further includes a processing unit connected to the comparison circuit for receiving the decision signal and processing the decision signal to produce a relay output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.