Compared to 200V AC systems, 400V AC systems are deployed for distribution circuits in stations with especially large loads to suppress voltage drops and reduce distribution loss, to efficiently power elevators
The disaster showed that--more than an inconvenience--losing power is life threatening to those who need electricity to power elevators
, mobility devices, medical equipment, and refrigeration for medicine.
Most generators are considered inadequate to power elevators
, air-conditioning, room lights, and complex life-support equipment.