Arrangement for measuring a current with a current transducer of the Rogowski type
US9557350B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2014 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Mar 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R35/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An arrangement for measuring a current with a Rogowski type current transducer and transducer electronics. The current transducer has a primary conductor winding for carrying the rated current to be measured, and a secondary conductor winding. The secondary conductor winding adapted to induce a voltage signal VS′ between a pair of second terminals. The current transducer having a third conductor winding adapted to receive a calibration current signal. The voltage signal VS′ contains a coil sensitivity S and is a superposition of a rated current voltage signal and an additional calibration signal. The transducer electronics being adapted to amplify both the current voltage signal and the calibration signal in the same amplifier and divide the amplified current voltage signal by that part of the amplified calibration signal that contains the coil sensitivity and the gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.