μsパルス電圧によるSF6ガスのコロナを介した絶縁破壊特性
1990 年 59 巻 2 号 p. 205-212
詳細
1990 年 59 巻 2 号 p. 205-212
Experiments were carried out to investigate the breakdown characteristics of SF6 gas at 3 atm between needle plane electrodes with a small gap of 1.2_??_2mm. The voltage-time characteristics of the corona and breakdown in SF6 gas were measured using μs pulse voltage of various wave fronts. Although the corona onset voltage decreased with increasing wave front, the breakdown voltage reached a maximum value as the wave front increased, and reduced at still longer wave fronts. The shape of V-t characteristics was, thus, different from that usually seen with a uniform field gap. A polarity effect was also seen on the breakdown characteristics. These anomalous breakdown characteristics are discussed together with the results of the corona properties observed with an image intensifier tube.
