Abstract
Long-term field experiences of ageing and
performance of polymeric silicone rubber (SIR) and ethylene-
propylene-diene monomer (EPDM) insulators under
natural contamination conditions in an outdoor station
are presented. The primarily aim of the work is to study
the interrelation between surface conditions and the electrical
performance of polymeric insulators. In this paper
the leakage current statistics, the hydrophobicity and the
~urface conditions of six SIR and three EPDM commer~
ially available insulators are studied in detail. The surface
conditions were studied using electron spectroscopy
for chemical analysis (ESCA), attenuated total reflection
fourier transform infrared (ATR-FfIR) spectroscopy and
scanning electron microscopy (SEM). The results show a
strong interrelation between the conditions of the insulator
surface, especially the hydrophobicity, and the performance
with respect to leakage currents and voltage
withstand.
Users
Please
log in to take part in the discussion (add own reviews or comments).