Internal Discharges in Thin Oil Films |
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1-A Curve 90 degrees Centigrade amount amplifier apparatus appear atmospheric pressure balance becomes beginning brass bridge cold discharge conduction connection critical value Critical Voltage Curve d oil definite Deflection in CM degrees Centigrade described detected determination dielectric discharge currents Effect of Oxidation Effect of Thickness electrical electrode materials electrode plate engineering existence expected fact Figure film thickness filter function Galvanometer Deflection gas bubbles give glass plate gold greater guard hence important inch increased indicate initial insulation internal discharges ionization lead lower magnitude matter means measuring electrode mechanism metal method millimeters of mercury observed obtained occurred oil cell oil film oscillograph oxygen passed phenomenon photographic placed possible power factor present producing readings reasonable reduced pressure repetitions room temperature sample shown in figures solubility Stress in Volts surface taken tests Thickness of Oil thru value of stress Volts per Mil