Field evaluation of FR5 glass optical current transducer

Pawel Niewczas; W. Craig Michie; Iain W. Madden; Andrew Cruden; James R. McDonald

doi:10.1117/12.397875

31 August 2000 Field evaluation of FR5 glass optical current transducer

Pawel Niewczas, W. Craig Michie, Iain W. Madden, Andrew Cruden, James R. McDonald

Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000) https://doi.org/10.1117/12.397875
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom

Abstract

This paper presents the operation of an optical current transducer (OCT). The OCT operates by measuring changes in the polarization state of light traveling through a magneto- optic sensor head exposed to the magnetic field of a current carrying conductor. The changes in polarization state are directly related to the magnitude of the current flowing within the bus bar but ia also influenced by external environmental parameters such as temperature and mechanical disturbance. Engineering solutions to these influences have been implemented. Thermally induced errors of greater than 25% are shown to be corrected to less than 0.2% over a range of temperatures from -45 degree(s)C to 140 degree(s)C. In addition to this, signal waveform distortion resulting from mechanical vibration is automatically reduced by more than 30 dB over a range of frequencies from 0 Hz to 5 kHz. This paper reports on the design of this OCT and on detailed investigations carried out at the British Short-Circuit Testing Station to establish the operational characteristics of the OCT when subjected to transient current signals often with a significant dc component.

Citation Download Citation

Pawel Niewczas, W. Craig Michie, Iain W. Madden, Andrew Cruden, and James R. McDonald "Field evaluation of FR5 glass optical current transducer", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); https://doi.org/10.1117/12.397875

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