Cast condenser bushing

Abstract

Abstract A condenser bushing assembly, and method of manufacturing same, having a generally cylindrical body portion formed of cast solid insulation, a central conductor in the body portion, and one or more conductive condenser elements radially spaced from said central conductor. The radially spaced conductive condenser elements are arranged in a spiral configuration and comprise one or more layers of spiral arranged concentrically of each other about the central conductor and radially spaced from each other. The required capacitive relationship of the conductive condenser elements is provided by metallic coatings arranged in a predetermined pattern on predetermined portions of a spiral sheet of polycarbonate. A spiral sheet of polycarbonate comprising a plurality of turns having the conductive condenser elements provided thereon is positioned in a mold and the insulation which forms the body portion of the condenser is cast around the spiral polycarbonate member. The material used to cast the cylindrical body portion chemically attacks the polycarbonate of the spiral member during the casting operation and causes the polycarbonate of the spiral member to soften and amalgamate with the material of the body portion of the condenser to eliminate all interfaces between the material of the body portion of a condenser bushing and the material of the polycarbonate spiral member carrying the conductive elements of the condenser system, and the conductive elements of the condenser system.

Inventors

• 👤 P Martincic
• 👤 C Moore

Bibliographic Details