Which outcome results when an arc flash occurs within an industrial power transformer's circuit breaker compartment?

💡 Explanation

An arc flash generates immense heat, leading to extremely rapid heating of surrounding air and vaporizing metallic components. This sudden **pressure wave propagation** causes a rapid expansion of gas because the breaker enclosure can't vent quickly enough, therefore a pressure rise occurs, rather than dielectric breakdown or harmonic effects which occur via different processes.

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