The sixty-cycle flashover of long suspension insulator strings

This is a study of the 60-cycle flashover of strings up to voltages of 1100 kv., undertaken at the Ryan High-Voltage Laboratory, Stanford University. Investigation was made of the variations in flashover voltage for similar horizontal and vertical strings, with and without shields and tower members. An attempt has been made to correlate these flashover voltages with the point-to-point and point-to-grounded-plane arc-over voltages established in 1928 at the Laboratory.¹