Title :
Surface charging and charge decay in solid dielectrics
Author :
Neves, Alexandre ; Martins, Helvio J A
Author_Institution :
Centro de Pesquisas de Energia Eletrica, Rio de Janeiro, Brazil
Abstract :
This paper presents the results of an investigation into surface charging and charge decay in solid dielectrics such as Teflon (PTFE), epoxy (filled with alumina) and polyethylene. The experiments were carried out in atmospheric air and SF6 environment. Impulse and AC voltage were used to generate charges, by partial discharges, in a point/insulation sample/plane electrode arrangement. The results showed that surface charging and charge decay are influenced by several parameters such as ambient gas, surface resistivity, voltage level and polarity and subsequent voltage application
Keywords :
electric breakdown; epoxy insulation; impulse testing; insulation testing; partial discharges; polyethylene insulation; surface charging; AC voltage; PTFE; SF6; Teflon; ambient gas; charge decay; epoxy; impulse voltage; insulation breakdown testing; partial discharges; polyethylene; solid dielectrics; surface charging; surface resistivity; voltage level; voltage polarity; AC generators; Conductivity; Dielectrics and electrical insulation; Electrodes; Partial discharges; Polyethylene; Solids; Surface charging; Surface discharges; Voltage;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549461
