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One of the most serious problems in measurements electrical power systems is the possibility of over-voltages resulting from ferroresonance phenomenon. This can result in high overvoltages that can cause insulation failures in transformers, cables, and arresters. Ferroresonance is a general term applied to a wide variety of interactions between capacitors and iron-core inductors that result in unusual voltages and/or currents.This work is aimed at proposing a simplified model of ferroresonance phenomenon in single phase power transformers and analyzing the instantaneous wave shapes of voltage...