The dielectric strength and life of impregnated-paper insulation — II: The influence of the thickness of the paper

THE peculiarly severe conditions imposed by manufacture, transportation, installation, and operation of highvoltage cables have emphasized the importance that full attention be paid to all physical properties of the insulation, especially those relating to permanence of mechanical structure and of high insulating properties. The requirement of wide flexibility is at the root of the present method of applying the paper insulation in spiral tape form in successive layers.