Influence of Air Density on Flashover Voltages of Air Gaps and Insulators

Flashover tests were conducted with the cooperation of the Central Research Institute of Electric Power Industry, the Tokyo Electric Power Company, Inc., and the Chubu Electric Power Company, Inc., at the top of Mount Nyũ gasa, 1850 meters above sea level and the Takeyama Laboratory, nearly at sea level, to obtain comparative data to evaluate the influence of air density on the flashover voltages of air gaps and insulators.