Two pole circuit breaker voltage monitoring integration
US8106670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2008 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Sep 29, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for monitoring line voltage in a circuit breakor includes a controller configured to calculate a voltage difference between the neutral voltage and the AC line voltage of positive polarity based on a first signal and a second signal and assign, using a polarity signal, the voltage difference value to the AC line voltage of positive polarity and the second signal to the AC line voltage of negative polarity. Because the AC line voltage of positive polarity can be calculated based on the first signal and the second signal, the number of signals requiring A/D conversion is reduced, and the number of circuit components needed to measure the AC line voltage is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.