Primary Disconnect Bushings are designed for use in switchgear applications ranging from 15 kV through 46 kV. All designs are manufactured using Cycloaliphatic Epoxy materials and are capacitive graded. That is, the disconnect bottle houses an integrally cast ground shield and high voltage shield to control the electrostatic field. The internal shielding provides excellent partial discharge and stable power factor characteristics in comparison to external coatings required on older porcelain designs. Access to internal ground shields is provided through flange mounting inserts or sleeves, eliminating the need for cumbersome external leads. The one-piece design provides rugged performance typically required in primary disconnect applications. EPC specializes in custom development of replacement primary disconnect bottles for obsolete designs from all OEM’s.