The influence of water resistivity and precipitation rate upon 60-cycle wet flashover voltage

The working group on rain tests was appointed in January 1957, for the purpose of studying problems associated with wet flashover and wet holding tests on high-voltage insulators such as are used on transmission and distribution lines. These problems are intimately concerned with the resistivity of the water used in the tests and the rate of precipitation with which it falls on the test specimen. In connection with the latter, a study of suitable methods for applying the water to the test specimen may well be an area for investigation, particularly for use in wet flashover or holding tests on extra high voltage insulation.