Designed for underground rail environments, this switchgear for metro stations uses halogen-free busbar insulation and intumescent fire barriers to maintain 400 A emergency feeders for 90 minutes at 850 °C. Dual incomers fed from separate substations interlock via PLC logic to prevent back-feeding. Draw-out MCCBs up to 1600 A are fitted with shunt trips linked to the station’s FAS (Fire Alarm System) for instant load shedding.