Calculation of Overpressure in the Enclosure of a Hydroelectric Generator during a Phase-to-Phase short circuit with electric arc

Phase-to-phase short circuits involving electric arcs in generators are rare but highly energetic events. They pose a significant risk to equipment integrity and personnel safety particularly within enclosed generator chambers, as it is often the case for hydroelectric generators. Due to their infrequency, limited data and modelling approaches are available in both industrial documentation and scientific literature.