Schneider Electric 15T3HCU Insulated Transformer

Schneider Electric's Square D EXN15T3HCU transformer, commonly marketed as the 15T3HCU insulated transformer, is a 15 kVA, three‑phase dry‑type unit with a 480 V delta primary and a 208Y/120 V secondary. It uses copper windings and Sorgel insulation, and is designed to meet DOE 2016 energy‑efficiency requirements with a 150 C rise rating. The transformer is compatible with Square D equipment, with terminals sized to accommodate standard wiring for Square D breakers, switches, and panelboards, and its enclosure dimensions are 23.98 in high x 21.50 in wide x 21.18 in deep. This configuration steps 480 V supply down to 120/208 V circuits for use in commercial or industrial electrical distributions.