Title :
Direct measurement just under surface discharge on PMMA by Pockels electric field sensors
Author :
Takahashi, Tsuguhiro
Author_Institution :
Electr. Eng. Dept., Central Res. Inst. of Electr. Power Ind., Kanagawa, Japan
Abstract :
Surface discharge is one of the main phenomenons in electric apparatus´s fault, but has not yet been cleared. The measurement of electric fields in or near a streamer while surface discharge creeps is greatly helpful for it. There is optical measurement technique for electric fields by using Pockels crystal, and optical waveguide technique has been successfully introduced to miniaturize the sensors. The measurement of electric fields just under surface discharge is tried with the optical waveguide Pockels sensor installed on a PMMA plate and output signals according to its advance are obtained
Keywords :
Pockels effect; electric field measurement; insulation testing; optical waveguides; polymers; sensors; surface discharges; PMMA surface discharge; Pockels electric field sensors; electric fields measurement; optical waveguide technique; Electric variables measurement; Magnetic field measurement; Optical refraction; Optical sensors; Optical surface waves; Optical variables control; Optical waveguides; Sensor phenomena and characterization; Surface discharges; Waveguide transitions;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973674
