Square D 45T3H Industrial Three Phase Power Transformer

Square D 45T3H is a 45 kVA dry‑type, three‑phase power transformer from Schneider Electric’s Square D line. It accepts a 480 V primary (delta configuration) and provides a 208Y/120 V three‑phase secondary at 60 Hz, making it a compact solution for stepping down higher‑voltage utility or silo feeds to common 120/208 V service for equipment, panel boards, and control systems in industrial facilities. This ventilated dry‑type transformer is designed for general‑purpose power distribution in commercial and industrial environments, delivering reliable voltage transformation while minimizing oil‑filled equipment in favor of a maintenance‑friendly solid‑state winding construction. Variants in the EX/EXN family carry the 45T3H designation and share the same basic voltage pairs (480 V delta to 208Y/120 V) and 60 Hz operation, with model nuances that determine enclosure, mounting, and installation options. Typical applications include feeding control panels, motor control centers, switchgear, and other 3‑phase loads that require a robust, code‑compliant transformer to convert 480 V down to 208Y/120 V for downstream equipment.