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A new hybrid current sensor for high-voltage applications

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3 Author(s)
Bull, J.D. ; Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada ; Jaeger, N.A.F. ; Rahmatian, F.

This article presents a new hybrid electro-optic/inductive current sensor for metering and protective relaying applications. The sensor combines a Rogowski coil with a passive integrator located in the high-voltage environment. An integrated-optic Pockels cell (IOPC) having integrated electrodes provides optical isolation. Test results from 30 A to 30 kA show the sensor to be highly linear, exceeding 0.2% linearity standards. Temperature cycling tests show the ratio error to have a maximum value of 0.3% over the -30 to +70°C range.

Published in:

Power Delivery, IEEE Transactions on  (Volume:20 ,  Issue: 1 )

Date of Publication:

Jan 2005

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