Title :
Correction of Switching Impulse Flashover Voltages for Air Humidity
Author :
Jaroslav Kucera;Vaclav Fiklik
Author_Institution :
Power Research Institute
Abstract :
Long time measurements on rod gaps are described. The statistical evaluation of results is followed by the extraction of the influence of air humidity upon two waves in the region of minimum flashover voltages. The corrections decrease with increasing spacing of gaps in a way similar to the corrections for air densities. Therefore, the IEC correction can be applied only for spacing below 1.5 meters. No substantial difference between rod-plane and rod-rod spark gap for positive waves has been observed. About 250 S curves have been evaluated.
Keywords :
"Flashover","Voltage","Humidity measurement","Temperature","Pressure measurement","Laboratories","IEC standards","Time measurement","Sparks"
Journal_Title :
IEEE Transactions on Power Apparatus and Systems
DOI :
10.1109/TPAS.1970.292721
