Transformer tank rupture - A protection engineer's challenge

According to a recent draft IEEE PC 57.156 Guide for Tank Rupture Mitigation of Liquid Immersed Power Transformers and Reactors published by the IEEE PES Transformer committee “There are combinations of arc energy, location, and duration which overwhelm the capacity of the standard pressure relief to protect the tank. It has also been demonstrated, theoretically and from field tests, that for low impedance faults with energy levels susceptible to cause the rupture of the tank, the rate of pressure rise is too high and the Pressure Relief Device (PRD) have, at best, little effect in preventing the rupture.” Later in the document, in Annex B, titled “Other Items Relating to Prevention of and Responses to Arcing Rupture”, under the heading Transformer and System Design Considerations it states. “Inclusion of an appropriately rated protective relay may allow for prompt isolation from the energy source of the fault.” The ball seems to be in the protective relay engineer's court.