Electromagnetic induction type current transformer secondary current in transient error occurred during

When a current is mutated, the electromagnetic induction type current transformer secondary current in transient error occurred during (and worse than the angular difference). Sources of error  power transformers  for transient error is the electromagnetic induction type current transformer core nonlinearity caused by an inherent  air circuit breaker  When a large current through, especially when the system is short-circuit fault occurs, a Electric transformer percentage of non-periodic component, the total current in favor of one side of the axis, the induced voltage current transformer magnetizing current needed to quickly increases, the core saturation, resulting in secondary current (first current minus the excitation current) values ​​and waveform distortion.