Creeping flashover characteristics in (N2/SF6) gas mixture under pulse voltage

✍ Scribed by Katunori Watabe; Kouji Shinomiya; Hideki Ueno; Mitsuyoshi Onoda; Hiroshi Nakayama

• Book ID: 102662148
• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 897 KB
• Volume: 131
• Category: Article
• ISSN: 0424-7760
• DOI: 10.1002/(sici)1520-6416(20000415)131:1<1::aid-eej1>3.0.co;2-#

✦ Synopsis

The effect of a barrier between a needle electrode and a plane one in an (N 2 /SF 6 ) gas mixture on creeping flashover was investigated using a microsecond pulse voltage. The SF 6 gas content was varied from 0% to 100%, and the gas pressure from 0.1 MPa to 0.3 MPa. The flashover voltage increased with increasing SF 6 gas content for a positive needle electrode. For a negative needle electrode, excepting the total pressure of 0.1 MPa, at which similar flashover characteristics were obtained to the positive case, a considerable decrease in flashover voltage was found in the case of a mixture of a few percent SF 6 in (N 2 /SF 6 ) gas mixture at elevated total pressures. The corona behavior on the barrier in (N 2 /SF 6 ) gas mixture was investigated by means of a high-speed digital framing camera.