GENERAL EXPRESSION FOR CURRENT TRANSFORMER

The mechanism of the current transformer is analyized, and its express ion is derived as a complex function of the frequency spectrum or as a real function of the time evolution. These formulae include the effec t of magnetic material, which is usually a part of the current transfo rmer, and cause a multiple droop phenomenon in the time evolution. It becomes clear that the multiple droop phenomenon is enhanced in the ca se of a few turns of secondary windings, such as in a wall current mon itor. In the case of many turns of secondary windings, the longest dro op component becomes dominant, and the remaining shorter droop compone nts disappear.