Shaping of Magnetization Curves and the Zero Error Current Transformer

NONE of the methods previously available to improve transformers is capable of producing an important requirement of the power industry; namely, the high accuracy, high voltage, low ratio, bushing type current transformer operated at a high secondary burden. However, in analogy with the molecular theories of magnetization, a method of shaping magnetization curves has been advanced for securing constant permeability. Tests prove this method to be very effective and to result in a permeability which remains constant within fractions of one per cent over a wide range of induction.