Zero-phase sequence current detector
US5159561A · kind A · utility
21Cited by
6References
2Claims
0Family size
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Key dates
| Filing date | Apr 5, 1990 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Apr 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A zero-phase sequence current detector have three circular cores provided around three phases overhead lines of AC power lines, three magnetoptic sensors provided on respective cores for detecting currents flowing on respective power lines, and a processing circuit containing an adding circuit for adding outputs of the magnetoptic sensors and a compensation processing circuit for canceling erroneous components due to the differences of the temperature characteristics among the magnetoptic sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.