The Charateristics of Flash-over Voltage by Humidity Variation for 22.9 kV Live Part

22.9 kV 노출충전부의 습도변화에 따른 섬락전압 변동 특성

As the statistical data, the most of electrical shock accidents have been caused by human errors including those of mistake, carelessness, and so on during normal condition. But, there are currently no international standards for the determination of withstand distance to ensure safety of personnel form 22.9 kV electrical power facilities during their normal operation. Therefore, this paper describes the characteristics of flash-over voltage by moisture variation to establish the distance clearances in terms of electrical safety.