Siemens Low Voltage Low Voltage Distribution Dry-Type Transformers. 3-Phase transformer. Primary voltage (480V), secondary voltage (208Y/120) six taps 2.5pct (2 FCAN and 4 FCBN). Rated (225kVA). Special features K-Factor 1, copper windings, 115 DEG C temp rise (15pct overload tolerance), meets DOE 2016 energy efficiency standards.