Schneider Electric 300T3HB Three Phase Transformer

Schneider Electric’s Square D 300T3HB three-phase transformer is a dry-type, 300 kVA unit designed to interface a 480 V three-phase supply with a 208Y/120 V secondary. It uses copper-wound windings and operates at 60 Hz, with 2 high-voltage taps and 4 low-voltage taps to fine-tune output, and it weighs approximately 2,100 lb. Historically associated with the Sorgel transformer line, the 300T3HB model represents Square D’s 300 kVA dry-type family for commercial and light-industrial power distribution. The 208Y/120 V secondary supports feeding distribution panels, switches, and receptacle circuits from a 480 V bus, enabling compact, robust step-down power in facilities that require reliable low-voltage power from a three-phase 480 V source. This variant aligns with other 300 kVA dry-type transformers commonly used in industrial and commercial settings to deliver safe, consistent 120/208 V service.