Analysis of bushing-current-transformer performance

This paper is a presentation and discussion of the more important results obtained in a series of extensive tests made on bushing current transformers. In addition to the determination of the ratio and phase-angle characteristics, tests were made to determine the division of current in interconnected secondary circuits for conditions simulating actual faults in the primary circuit. It is also shown that most of the results obtained from the tests may be readily calculated from the excitation-current data.