Current-transformer output and application charts

IN recent years the theory of operating of multiratio bushing-type current transformers has been given extended study resulting in a simplification of the application curves.^1,2 There is still lacking, however, a single chart from which the ratio correction factor for any value of primary current, any turn number, any secondary burden, and burden power factor can be read directly. In this paper a study is made to determine the feasibility of such a chart.