Published: Jan 1960
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Increasing loads on electrical systems call for higher currents and higher voltages. These invite the use of larger conductors and thicker insulation. However, due to limitations imposed by manufacturing, transportation, and installation, there is a practical limit to cable diameters. Therefore, a condition is reached where higher voltages cannot be met by more insulation but require the use of insulation of higher quality. At present, the only commercially and technically available high-voltage cable insulation is Kraft paper impregnated with mineral oil. Therefore, progress depends on effective cooperation between paper makers and cable makers as well as between cable makers and oil refiners. The purpose of the present paper is to present, from the cable maker's point of view, the lines along which such cooperation is necessary, if paper insulation is to hold its present lead.
Del Mar, Wm. A.
Consulting Engineer, Phelps Dodge Copper Products Corp., Bayway, N. J.