Jefferson Electric 421-7186-304 is a 25 kVA single-phase power transformer with a 480 V primary and a 277 V secondary, enclosed in a NEMA 3R housing for outdoor installation. It steps down from 480 V to 277 V to feed 277 V loads in commercial or industrial settings. The NEMA 3R enclosure provides weather-resistant protection for exterior electrical distribution equipment.
