Sparking voltage of a conductor passing through an earthed plate

摘要

The electric-field system within a circular aperture in an earthed plate through which a high-voltage conductor passes is examined, using oblate-spheroidal co-ordinates. Electrolytic-tank studies give utilisation factors which agree with those calculated to within ???????±5%. Sparking voltages are calculated using a general discharge law, and these agree with measured values to within ???????±6%.