Review article
OPTICAL VOLTAGE TRANSDUCERS
R. Zelić
V. Filipović
Z. Martinović
Abstract
The paper presents basic operating principles of optical transducers for the measurement of high voltage. It was observed by Pockels that the change in refractive indexes in certain crystals is proportional to the applied electric field. The main parts of the sensor based on Pockels effect are: polarizer, Pockels crystal and analyzer. These are passive elements to and from which the light is taken by means of optical fibers from an electronic device at the earth potential. The polarized light that vibrates in two mutually perpendicular planes passes through the crystal at different speeds that change under the influence of the electric field, which is detected by an electric circuit. The longitudinal and transverse effect are distinguished with respect to the applied electrical field.
Keywords
optical voltage transducers; Pockels effect
Hrčak ID:
7871
URI
Publication date:
31.12.2006.
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