Abstract: In this paper, a simple 3-bus power system model which includes a dynamic induction motor model is simulated to study chaotic characteristics. Given a deterministic model describing a system and an initial condition, the system behavior can not always be predicted. Sensitivity on initial condition, inherent randomization and so on are the characteristics of chaos. It is shown that voltage collapse can be resulted from bifurcation and chaos phenomena that a system may experience under the influence of system parameters. The result also shows voltage collapse in the chaotic area far from the saddle node bifurcation.