Computer simulation is a basic tool in future power engineering education because it allows a better understanding of the various electrical phenomena without the need to make contact with a real system. The achievement and use of simulators contribute to the improvement of electricity supply security taking into account the basic idea that one of the utmost important factors in the electric power field is the quality, education and training of specialists. When connecting and disconnecting the electrical circuits using circuit breakers, voltages and currents occur that differ from those in stationary or quasi-permanent regimes, generating high stress working conditions of the electrical appliances. We present an application made to simulate the short-circuit current and the transient recovery voltage, under certain simplifying conditions. Flash code and Action Script programming language was used to the completion of the simulator software. The items exhibited in the paper highlight a real solution to achieve a suitable interface for graphic analysis of dynamic phenomena in electric networks. Our application is meant to improve the electric engineering education with modern simulation methods.