Optically isolated line voltage sensing circuit
US5959448A · kind A · utility
33Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1996 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Sep 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A linear optocoupler is employed to provide a signal which is a galvanically isolated reproduction of the magnitude of an A.C. line voltage and another galvanically isolated signal indicative of a change in the polarity of the line voltage for enabling safe monitoring of a change the A.C. voltage. Actuation of an automatic transfer switch to substitute an emergency source of power for a normal source that has failed may be achieved with the emergency power waveform used to replicate the normal power waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.