평등/불평등 전계에서 $SF_6-N_2$ 혼합가스의 절연파괴 특성연구

Breakdown Characteristics of $SF_6-N_2$ Mixtures under Uniform and Non uniform Electricc Field

In this work, experimental investigation was carried out for the breakdown characteristics of $SF_6$, $N_2$ and their mixtures under the uniform and non-uniform electric field, by use of HVAC and standard impulse testing voltages, as a function of different gas pressures from 1 atm to 5 atm. The results show that the dielectric strength of the $SF_6$ mixed in $N_2$ was significantly increased at its portion of 10%, which might imply that the optimum mixture of $SF_6$ for the HV switch gear could be proposed to be 10%.