A simple method for the determination of bushing-current-transformer characteristics

Now that excitation characteristics are being made available to the application engineer, it has become increasingly important that a simple accurate calculation method be used to determine the errors. “Inphase addition” has all the advantages of simplicity, and, under careful analysis, it is apparent that over the normal ranges involved, the more complicated procedure of vector addition is not warranted. This simple method has been extended to cover complete curve drawing from only one calculation by a graphical process.