Title :
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
fDate :
6/1/1994 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
