Title :
Insulator charging in SF6 produced by impulse voltage
Author :
Vasconcelos, F.H. ; Cornick, Keith J.
Author_Institution :
Dept. de Engenharia Eletrica, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil
Abstract :
This work is concerned with the study of the charging process on insulators. The charges were produced by discharges inside a test-cell containing SF6. The discharges were due to impulse voltage applied to a point-plane arrangement with the dielectric covering the flat electrode. The charging current was measured along with the impulse voltage. The surface charge deposited on the dielectric was scanned using an electrostatic probe. The results presented are concerned with the previous state of the samples (in terms of charging) associated with change in polarity and in magnitude of the applied voltage
Keywords :
SF6 insulation; epoxy insulators; gas insulated switchgear; impulse testing; insulator testing; polymer insulators; surface charging; GIS; SF6; applied voltage magnitude; charging current; electrostatic probe; epoxy insulators; flat electrode; gas insulated equipment; impulse voltage; insulator charging; point-gas-dielectric-plane arrangement; point-plane arrangement; polarity; polycarbonate insulators; surface charge; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Electrodes; Electrostatic measurements; Probes; Surface charging; Surface discharges; Testing; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564645
