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Suppression of Metallic Particle Lift‐Off in GIS by a Nonlinear Resistivity Coating
Author(s) -
Nojima Kenichi,
Zhang Xueqin,
Matsuzaki Hidehito,
Ando Hideyasu,
Shiiki Motoharu,
Takei Masafumi
Publication year - 2014
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22535
Subject(s) - materials science , electrical resistivity and conductivity , coating , switchgear , electric field , nonlinear system , lift (data mining) , composite material , particle (ecology) , electrical engineering , engineering , physics , geology , computer science , oceanography , quantum mechanics , data mining
SUMMARY To suppress metallic particle lift‐off in compact gas‐insulated switchgear (GIS), a coating with nonlinear resistivity characteristics was developed for the inner surface of the GIS tank. An electrical field analysis that measured the current density and electric field (J–E) characteristic indicates that a nonlinear resistivity coating can reduce field intensification at triple junctions between metallic particles and the coating, and can effectively suppress particle lift‐off. The results of experiments using a GIS mock‐up model indicate that a nonlinear resistivity coating increases the lift‐off electric field of metallic particles with less statistical dispersion than a dielectric coating.