Siemens 3FY015C Dry-Type Transformer Outdoor Unit

Siemens 3FY015C is a dry-type, ventilated three-phase transformer rated for 15 kVA, configured for outdoor service with a 480 V primary and a 208Y/120 V secondary. It arrives in a NEMA 3R outdoor enclosure (LD-designated variants appear in some listings) and uses aluminum windings with a six-tap voltage adjustment range of 2.5% (two FCAN, four FCBN). The unit carries a 115°C temperature-rise rating and is aligned with DOE 2016 energy-efficiency standards, reflecting Siemens’ approach to efficiency in distribution transformers. Typically used to derive 120/208 V loads from a 480 V source in outdoor commercial or light-industrial installations, this transformer is designed to endure outdoor exposure while delivering reliable, configurable step-down power for downstream equipment and circuits.