UHV tower insulation parameters determined by full-scale testing

A comprehensive series of impulse tests on a variety of simulated UHV tower windows is described in this paper. The tests overlap and extend existing data, making available switching surge flashover characteristics of tower windows up to 37 meters in width. All of the raw test data is included for comparison with similar programs in other laboratories. The effects of several variables on statistically derived flashover voltages are described, and application data for tower insulation up to 1900-kV transmission levels is derived from the test data.