Surface Flashover Characteristics on Poor Contact in N2/O2 Mixture Gas under Non-Uniform Field

불평등 전계 중 불량 접촉갭에 관한 N2/O2 혼합가스의 연면플래쉬오버특성

Lim, Dong-Young;Choi, Eun-Hyeok;Choi, Sang-Tae;Choi, Byoung-Ju;Lee, Kwang-Sik;Bae, Sungwoo

  • Received : 2015.06.01
  • Accepted : 2015.07.06
  • Published : 2015.08.31


This paper presents the surface flashover characteristics to simulate the poor contact between an anode and a solid dielectric in a $N_2/O_2$ mixture gas (8/2) under a non-uniform field. The surface flashover voltage of the $N_2/O_2$ mixture gas revealed the irregular tendency that was not in accordance with the Paschen's law with an increasing gap of the poor contact. In addition, the insulation performance of the $N_2/O_2$ mixture gas at 0.6MPa was comparable to that of $SF_6$ gas of 0.1MPa based on the insulation performance on the poor contact. These results are able to apply the insulation design of eco-friendly gas insulation switchgear considering the internal faults.


Breakdown;Gas Insulation Switchgear;$N_2/O_2$ Mixture Gas;Poor Contact;Surface Flashover


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