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http://dx.doi.org/10.5370/KIEE.2013.62.5.643

A Study of Corona Discharge in Polymer Insulators by Artificial UV Radiation  

Kim, Y.S. (Electrical Safety Research Institute, Korea Electrical Safety Corporation)
Choi, M.I. (Electrical Safety Research Institute, Korea Electrical Safety Corporation)
Kim, C.M. (Electrical Safety Research Institute, Korea Electrical Safety Corporation)
Bang, S.B. (Electrical Safety Research Institute, Korea Electrical Safety Corporation)
Shong, K.M. (Electrical Safety Research Institute, Korea Electrical Safety Corporation)
Kwag, D.S. (Dept. of Fire Safety, Kyungil University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.62, no.5, 2013 , pp. 643-648 More about this Journal
Abstract
In this study, degradation was observed by irradiating UV rays to the polymer insulators which have been widely used in outdoor electric power facilities. For an indoor accelerated UV test, 0.55 w/m2 of UV rays were applied using a xenon-arc method. A UV detection system with 65 ${\phi}mm$ in diameter, 100 mm in length and 1.0 of brightness (F/#) has been designed. Even though efflorescence on the surface of polymer insulators wasn't observed according to the accelerated UV test. UV rays were detected at around 50% and 40% of insulation breakdown in EPDM and silicone-type insulators respectively. As degradation continued because of an indoor accelerated UV test, breakdown voltage with which UV rays can be detected in an early stage decreased as well. A silicone polymer insulator would be severer than EPDM polymer insulator in terms of surface degradation because of UV strength against $V_m/V_{BD}$ was high in silicone polymer insulators. UV strength in silicone-type insulators increased at 1,000 $kJ/m^2$ because contact angle at the intial stage sharply decreased to from $113^{\circ}$ to $92.1^{\circ}$.
Keywords
UV radiation; UV detection; Polymer insulator; Surface discharge; Contact angle;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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