On the Time Lag of Surface Creepage

Abstract

In this paper, the author reports the experimental results about the time lag of surface creepage on photographic plate in air and in oil.
The time lag of surface creepage is measured by the same method as was utilized by the author to measure the time lag of spark.
It can be infered from the author's present investigations that: -
(1) The time lag of surface creepage on photographic plate, in air, varies with the shape of electrode on photographic plate.
(2) For equal surface creepage length, the time lag of surface creepage with half needle electrodes in air in shorter than that with half sphere electrodes, under constant surge voltage.
(3) For equal setting of surface creepage length, the time lag of surface creepage in air is shorter than that in oil.