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Dimensions of Cylindrical High Potential Bushings

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Abstract

ABSTRACT

A mathematical investigation is made of the relations involving the dimensions of cylindrical high potential insulating bushings. Use is made of the equation giving the maximum potential gradient in the dielectric, when a belled outside shield is used.

For a minimum cross-sectional area of the ring of dielectric it is found that

r=1.255Vf/gmR=2.218r

where r is the inside diameter of dielectric in cm, R is the outside diameter. V is the maximum line voltage in kilovolts, f is the factor of safety, and gm is the dielectric strength in kilovolts per centimeter.

© 1924 Optical Society of America

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