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

Author

Anagni, Francesco ; Bartoletti, Cipriano ; Marchetti, Ugo ; Podesta, Luca ; Sacerdoti, Giancarlo

Author_Institution

Dept. of Electr. Eng., Rome Univ., Italy

Volume

43

Issue

3

fYear

1994

fDate

6/1/1994 12:00:00 AM

Firstpage

475

Lastpage

480

Abstract

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 SF₆ 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

Keywords

fibre optic sensors; liquid crystal devices; switchgear testing; voltage measurement; EM immunity; SF₆; SF₆ insulation; cost; electric metal-clad MV switchboards; electric substations; excitation state; fiber optic detector; liquid crystal cell; optical sensors; reliability; voltage presence detector; Dielectrics and electrical insulation; Liquid crystals; Medium voltage; Optical design; Optical detectors; Optical fiber sensors; Optical fibers; Optical sensors; Probes; Substations;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.293470

Filename

293470