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http://dx.doi.org/10.4313/JKEM.2007.20.4.381

AC Breakdown Voltage Characteristics of SF6/CF4 in Uniform field  

Hwang, Chung-Ho (인하대학교 전기공학과)
Park, Woo-Shin (인하대학교 전기공학과)
Kim, Nam-Ryul (인하대학교 전기공학과)
Huh, Chang-Su (인하대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.20, no.4, 2007 , pp. 381-387 More about this Journal
Abstract
The excellent dielectric properties of $SF_6$(sulfur hexafluoride) have lead to its wide range of application in the field of high voltage insulation. Because there has been some recent concern regarding the environmental impacts of $SF_6$ binary gas mixtures, with $SF_6$ as the main component, have been the subject of active research. Scientists have long been interested in the possible use of gaseous fluorocarbons, including $CF_4$ (Carton Tetrafluoride), in high voltage applications due to their inert character and high dielectric strength. This paper presents experimental results concerning the AC breakdown characteristics lot various mixtures of $SF_6/CF_4$ in a test chamber and 25.8 kV GIS (Gas Insulation Switchgear) at practical pressures (0.1-04 MPa) and gap lengths (0.5 mm, 1 mm) in a test chamber. In the result, it was observed that an increase in the dielectric strength is attained through the addition of $SF_6$ to $CF_4$. It is possible to make an environment friendly gas insulation material while maintaining the dielectric strength by combing $SF_6$ and $CF_4$ which generates a lower level of the "global warming" effect.
Keywords
$SF_6$; $CF_4$; GIS; AC breakdown voltage;
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