AbstractIt is generally understood that cryostatic conductors are too conservative in design and have too low current density to be applied to the magnets for next generation fusion experiment devices and realistic magnets. To increase the current density beyond the cryostatic stability criteria, it is necessary to estimate the energy of disturbance causing quenches and to design the conductor stable against the estimated disturbance. The most difficult disturbances to cope with are conductor motions. In this paper, the size of the disturbances due to conductor motions are related to mechanical properties, bending irregularity of the magnet conductors and winding and conductor structures. Based on those relations, the expected number of quenches of a magnet is also estimated.