The subject of this paper is the analysis of the influence of the network voltage regulation on the control of the excitation voltage of the synchronous generator in case of three-pole short circuits in the looped transmission network. The procedure and calculation of transients for a three-phase short circuit are presented, as well as the analytical expression for the short-circuit current under the influence of voltage regulation through generator excitation control. After that, it is moved on to simulation verification, where the process of implementation of synchronization and regulation is explained in details. Finally, the waveforms of interest during the short-circuit fault event were recorded, providing experimental validation of the theoretical background that short-circuit currents attain higher values when excitation-based voltage regulation is applied.