Ferroresonance is a phenomenon that occurs in voltage in the form of aperiodic oscillations that cause transient overvoltages, mainly in transformers. This phenomenon must be considered in the design of electrical systems, since it presents high levels of distorted voltages in a system. In the present article simulations are shown in ATPDraw, presenting serial type ferroresonances through different scenarios, observing the behavior of voltage signals. For the presence of ferroresonance, certain capacitive values are considered in cables and power supply voltage levels of the system, in addition, the impact on the location of switches is analyzed, observing how ferroresonance behaves under different operating conditions.