The role of the distribution transformer in the transference of voltage surges

Distribution transformer is a very important equipment that allows the delivery of electricity with a high degree of capillarity. As a consequence, all of the conductors of a distribution network become a way for bringing into a transformer voltage surges, especially those yielded by lightning. These effects have been intensively studied along the last decade in attempt to clarify how a transformer allows transference of voltage surges as well as to understand what happens inside it. One of the most used methodologies for its analysis is based on its frequency response. Thus, the aim of this work is to analyze some of the most usual premises for experimental tests of frequency response, by discussing their applicability as well as its usefulness. An experimental case is presented.