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All-Russian R&D Institute for the Cable Industry Moscow, RussiaCoupling Iosses in fully transposed Rutherford cables in magnetic fields with high change rates were investigated. Formulas were derived for the cable time constants at different mutual arrangements of the vectors associated with field and cable planes. As the magnetic-field change rate (B) increased, induction current in the strands increased, and local saturation regions appeared at the edges of the cable cross section. Coupling currents and loss redistributions occurred; the process could be attributed to two different mechanisms. Consequently, the B dependence of the coupling Iosses can have different shapes.In the more common case, coupling Iosses consist of three components whose relationship is determined by the nature of the cable and the dimensionless change rates of the magnetic field. Transport currents strongly influence the coupling losses. This influence is different for simultaneaus changes of current and field and for magnetic-field changes with a constant transpoft current.

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