This standard is applicable to bushings intended for use in high voltage circuit breakers and gas insulated switchgear. These bushings are intended for indoor and outdoor use, operating on alternating current with a rated voltage greater than 1000 V and a frequency of 50 or 60 Hz. These bushings are usually a part of an apparatus and tested according to the apparatus of which they form part. It defines the special terms used, service conditions, ratings, general requirements, test procedure and acceptance criteria for these bushings.