Some commonly used models of induction motors may give erroneous results in bus transfer studies of auxiliary systems which contain induction motors driving low inertia loads.A thorough bus transfer study must consider three time periods: the disconnect period, the period immediately after reenergization, and the longer time period during which bus voltage and motor speeds are restored. This paper provides a report on a current investigation to determine if improved accuracy can be obtained using different induction motor models than presently being employed by the authors [1,2] for bus transfer simulations where the loads have low inertias.Bus transfer simulations are presented using five different models.Based on a comparison of these simulations, a motor model for each of the three time periods of interest is recommended.