Current monitoring circuit for static switch of uninterruptable power system
US4583004A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1983 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Sep 22, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for monitoring the load current supplied by an uninterruptable power supply for transferring the load to a secondary source when the load current exceeds the capability of the uninterruptable power system. A signal representing the load current is simultaneously, continuously compared to a first reference level and a second reference level. The second reference level has a greater effective magnitude than the first reference level and whenever it is exceeded by the instantaneous signal the transfer is initiated. The transfer is also initiated whenever the signal uninterruptably exceeds the first reference level for a selected period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.