Optical sensors for electric substations: a voltage presence detector using a liquid crystal cell

A new fiber optic voltage presence detector is presented, based on the detection of the excitation state of a liquid crystal cell by means of an optical technique. The sensor was designed to work in electric metal-clad medium-voltage (MV) switchboards with SF/sub 6/ insulation where EM immunity and...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 1994-06, Vol.43 (3), p.475-480
Main Authors: Anagni, F., Bartoletti, C., Marchetti, U., Podesta, L., Sacerdoti, G.
Format: Article
Language:English
Subjects:
Applied sciences
Dielectrics and electrical insulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Liquid crystals
Medium voltage
Optical design
Optical detectors
Optical fiber sensors
Optical fibers
Optical sensors
Power networks and lines
Probes
Substations
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Summary:A new fiber optic voltage presence detector is presented, based on the detection of the excitation state of a liquid crystal cell by means of an optical technique. The sensor was designed to work in electric metal-clad medium-voltage (MV) switchboards with SF/sub 6/ insulation where EM immunity and insulation requirements make fiber optic sensing the most suitable choice. The small size of the probe, its high reliability, and its low cost make it especially suited for these compact structures. Working principle and design details are reported.< >
ISSN:0018-9456
1557-9662
DOI:10.1109/19.293470