Square D 75T3H Transformer

Square D 75T3H is a 75 kVA dry‑type, three‑phase transformer from Schneider Electric’s Square D line designed for indoor general‑purpose power distribution. It accepts a 480 V delta primary and provides a 208Y/120 V secondary at 60 Hz, making it suitable for stepping down higher‑voltage service to standard low‑voltage circuitry in commercial and light industrial installations. TheEXN75T3H/EX75T3H/EE75T3H family aligns with DOE 2016 energy‑efficiency requirements, with the EE variant delivering high efficiency (around 98.5%) and a 150°C rise rating for winding insulation, ensuring reliable performance under heavy loading. The enclosure is intended for floor mounting and typically offered in a NEMA 2 configuration for indoor environments, with six voltage‑tap options to fine‑tune the secondary output. Typical footprint runs near 37 inches tall, 30 inches wide, and 20 inches deep, reflecting Square D’s compact, robust design that fits alongside panels and switchgear in electrical rooms. This transformer is widely used as a general‑purpose distribution device to power panelboards, switchgear, and other low‑voltage equipment from a 3‑phase 480 V source, backed by a steel enclosure and compatibility with Square D mounting accessories for easy installation and service.