Voltage Stability refers to the ability of power system to maintain steady voltage at all buses in the system after being subjected to a disturbance from a given initial operating condition. In this paper, the IEEE 30-bus system is subjected to different loading and contingency conditions that simulate probable line faults and a load flow study is conducted with each configuration of load and contingency. The results are used to train a Counter Propagating Artificial Neural Network (CPANN) to classify the buses according to weakness. From the solution for the idealized system, the reduced Jacobian is used to determine the impact of the reactive power injection in the form of system voltage improvement at optimized capacitor bank locations.