Abstract
Electrical Safety Research Institute, Korea Electrical Safety Corporation, Gapyeong 477-818, Korea(Received February 8, 2011; Revised March 21, 2011; Accepted March 23, 2011) Abstract: Recently, ultrasound, infrared detector, V-I characteristic, gas analysis, UV (ultra-violet rays) camera etc. is used as inspections and diagnoses of the safety of power equipment. Especially, UV camera have attracted a great deal of interest from the view point of easy judgement. UV camera is used corona discharge. One of the most important and difficult problems to be solved filer design, materials and corona discharge. This paper is studied on the temperature characteristics, UV generation and shape analysis and corona pulse count according to the electrode distance and applied voltage. Also, Corona discharge characteristics in air are analyzed using prototype UV camera of Korea. UV generation due to surface discharge of AC is higher than that of DC. Keywords: Surface flashover, Corona discharge, Ultra-violet rays, Aging, Diagnosis
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