Abstract:Due to the greenhouse effect of SF 6 , the research on alternative insulation gases is currently a hot topic in high voltage engineering. The refrigerant gas such as HFC-227ea with low GWP has stable chemical properties, and high dielectric strength because of a large number of fluorine atoms. However, it is necessary to add buffer gases for relatively high liquefaction temperature(−16.7 • C) of HFC-227ea. In this article, the dielectric strengths of HFC-227ea and its gas mixtures under different gas pressure,… Show more
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