Prebreakdown phenomena between sphere-sphere electrodes in transformer oil

Abstract

Measurements have been made of the propagation velocities of both cathode and anode streamers in transformer oil using sphere-sphere electrodes. Under the conditions of these experiments, the cathode streamer development was a three-step process, while the anode streamer development was a two-step process. The average propagation velocities for the three-steps of the cathode process were 2.4×104, 1.5×105, and 3.9×106 cm/s. The two steps of the anode process propagated at average velocities of 3.8×105 and 4.4×106 cm/s.