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Vol. 87, Issue 1, January 2008, pp.52-62




Magneto-Optic Over-Current Detection with Null Optical Tuning


Sarbani CHAKRABORTY and *Satish Chandra BERA

Department of Electrical and Electronics Engineering, Birla Institute of Technology

Mesra, Ranchi-835215, Jharkhand, India

*Department of Applied Physics, University of Calcutta, 92 APC Road, Calcutta 700009, India

E-mail: sarbaniry@yahoo.com, schakraborty@bitmesra.ac.in, scb152@indiatimes.com



Received: 1 November 2007   /Accepted: 21 January 2008   /Published: 28 January 2008


Abstract: Over-current detectors (OCDs) are important components in system control but suffer from electromagnetic interference, noise, low response etc. In the present paper, a magneto optic element like Terbium Doped Glass (TDG) has been experimentally studied for its use as an over current detector. Null detection technique is used for over current detection. Theoretical equations have been derived to establish the experimental study. The experimental results are reported in the paper. The experimental data have been found to be in good agreement with the theoretical studies.


Keywords: Over-Current Detector, Faraday rotation, Optical Current Transducer, Polarization


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