Open AccessEffects of structure and material of polluted insulators on the wetting characteristics
Author(s) -
Yang Lin,
Bi Jikai,
Zhang Fei,
Hao Yanpeng,
Li Licheng,
Liao Yifan,
Zhang Fuzeng
Publication year - 2019
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2018.5069
Subject(s) - wetting , insulator (electricity) , materials science , composite material , wetting transition , contact angle
Umbrella‐type structure, the material of insulators and surface positions influence the wetting process of polluted insulator surfaces tremendously. Using a custom‐made phase‐angle‐difference (PAD) detection device, the PAD of the different positions of different polluted insulators is measured, and the PAD curves and partial pollution surface electrical conductivity γ 20 varying with time are plotted. The results show that there is a certain difference in the wetting characteristics of different positions. The saturated wetting time of different positions of LXAY‐70 insulators is 12.5–15 min; that for LXHY5‐70 insulators is 12–25 min; that for XWP2‐70 insulators is 8–14 min; and that for FXBW‐10/70 insulators is 18–26.5 min. The umbrella‐type structure is shown to have a direct effect on the wetting process of polluted insulators. The complicated umbrella‐type structure, especially the existence of umbrella ribs, causes an uneven degree of wetting between the upper and lower surfaces, and leads to the increase of the difference in wetting state between the different positions. Furthermore, there is a certain difference in the wetting speed of insulators comprised of different materials. Hydrophilic porcelain and glass insulators are more easily wetted than composite insulators, even though the hydrophobicity class of composite insulators is 7.