Impulse breakdown of covered cylinders in SF/sub 6/ and SF/sub 6/-gas mixtures

The effect of the following parameters on the breakdown field strength of coated cylinders in air, nitrogen, SF/sub 6/, a mixture of 50% SF/sub 6//50% air, and a 50% SF/sub 6//50% nitrogen mixture were studied: (1) voltage waveform and polarity and (2) insulating material and thickness. The results are presented graphically and in a table.>