Fiber-optic dc current sensor for the electro-winning industry

Klaus Bohnert; Philippe Gabus; Hubert Braendle; Peter Guggenbach

doi:10.1117/12.623794

23 May 2005 Fiber-optic dc current sensor for the electro-winning industry

Klaus Bohnert, Philippe Gabus, Hubert Braendle, Peter Guggenbach

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623794
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

A fiber-optic current sensor for direct currents up to 500 kA is presented. Applications include the control of the electrolysis process for the production of metals such as aluminum, copper, magnesium, etc. The sensor offers significant advantages with regard to performance and ease of installation compared to state-of-the-art Hall effect based current transducers. A novel scheme of a polarization-rotated reflection interferometer and fiber gyroscope technology is used to measure the magneto-optic phase shift. A new technique has been developed for packaging the sensing fiber in a flexible strip of fiber re-enforced epoxy for coil diameters up to several meters. The sensor can be installed without opening the current-carrying bus bars. Subsequent re-calibration is not necessary. Accuracy is within ±0.1% over a wide range of currents and temperatures.

Citation Download Citation

Klaus Bohnert, Philippe Gabus, Hubert Braendle, and Peter Guggenbach "Fiber-optic dc current sensor for the electro-winning industry", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623794

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