A Study on Characteristics of Insulation Breakdown and Surface Discharge by the Oxygen Concentration in the Dry Air in Quasi-Uniform Field

Title & Authors
A Study on Characteristics of Insulation Breakdown and Surface Discharge by the Oxygen Concentration in the Dry Air in Quasi-Uniform Field
Beak, Jong-Hyun; Seok, Jeong-Hoo; Choi, Byoung-Ju; Bae, Sungwoo; Kim, Ki-Chai; Park, Won-Zoo;

Abstract
This study was conducted to discover a substitute of $\small{SF_6}$ gas. $\small{SF_6}$ gas is widely used across the industries. Thanks to superior electrical properties, in particular, it has been commonly used in electrical industry. However, there have been a lot of studies on its serious effect on global warming. As a substitute of this synthetic gas, a mixture of dry air and $\small{N_2/O_2}$ was chosen in this study. In case of $\small{N_2/O_2}$, dielectric strength differs depending on the mixing ratio. This study examined dielectric breakdown and flashover after adjusting oxygen percentage in the dry air. This test was conducted in a quasi-uniform electric field depending on pressure, oxygen concentration and gas mixtures. The test results found that dielectric voltage and flashover voltage were the highest at a certain oxygen concentration. It is the results of this photoionization and electron attachment of oxygen.
Keywords
Gas Mixtures;Oxygen Concentration;Dielectric Breakdown Voltage;Flashover Voltage;
Language
Korean
Cited by
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