Transformer for Indoor Electrical Room is used in dedicated power rooms inside commercial buildings, factories, hospitals, schools, hotels, apartments, and public facilities. Indoor electrical rooms often require compact size, safe insulation, heat control, and accessible maintenance. Transformer for Indoor Electrical Room can be supplied as a dry type or cast resin transformer with protective enclosure, cooling fan, temperature controller, low-noise design, cable box, bus duct connection, and customized voltage ratio for building distribution systems.