Experimental study of breakdown voltage-time characteristics of large air gaps with lightning impulses

This study reports mainly two points about the breakdown voltage - time characteristics of 1 - 5 m rod-plane and rod - rod gaps with lightning impulses. It is shown, at first, that the breakdown time follows the logarithmic normal distribution with a constant impulse level and that the probability of the breakdown time can be determined by empirical equation from the mean breakdown time and its standard deviation. The second part covers the breakdown phenomena with lightning impulses, delineating the development of streamers and leaders in relation to breakdown time. Estimates on basis of breakdown processes are made to breakdown time with impulses of short tail waves.

[1]  M. Uman,et al.  Four‐Meter Sparks in Air , 1968 .

[2]  J. H. Hagenguth.  Volt-time areas of impulse spark-over , 1941, Electrical Engineering.

[3]  Mat Darveniza,et al.  Experimental and Analytical Studies of the Effect of Non-Standard Waveshapes on the Impulse Strength of External Insulation , 1973 .

[4]  C. F. Wagner,et al.  Mechanism of Breakdown of Laboratory Gaps , 1961, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[5]  Andrew R. Jones.  Evaluation of the Integration Method for Analysis of Nonstandard Surge Voltages [includes discussion] , 1954, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[6]  T. Suzuki,et al.  Breakdown process of long air gaps with positive switching impulses , 1975, IEEE Transactions on Power Apparatus and Systems.

[7]  J. H. Park,et al.  Surge voltage breakdown of air in a nonuniform field , 1956 .

[8]  R. L. Witzke,et al.  Surge Protection of Cable-Connected Equipment , 1950, Transactions of the American Institute of Electrical Engineers.

[9]  T. Udo.  Switching Surge and Impulse Sparkover Characteristics of Large Gap Spacings and Long Insulator Strings , 1965 .

[10]  Toshio Suzuki,et al.  Transition from the Primary Streamer to the Arc in Positive Point‐to‐Plane Corona , 1971 .