Abstract
IT is common experience to find that the values of electric strength of sheet insulating materials are lower when the measurement is made with the material immersed in oil than when the specimen is tested in air. This is usually explained by stating that the voltage for inception of discharge is higher in the liquid because of the higher electric strength of the liquid, so that when discharges do occur in this medium they are more intense and hence more damaging because of the higher voltage-drop across the discharge channel.
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BAKER, W. Influence of the Ambient Medium on the Breakdown Voltage of Sheet Insulating Materials. Nature 181, 1726 (1958). https://doi.org/10.1038/1811726b0
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DOI: https://doi.org/10.1038/1811726b0
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