ABB 15/20 MVA Three-Phase Power Transformer – 12.47kV to 4160Y/2400V (Dyn1) Late-model ABB three-phase unit substation transformer, manufactured in October 2023 and built for high-reliability industrial and utility applications. This transformer features natural ester fluid insulation (environmentally friendly) and is designed for both KNAN and KNAF cooling, offering flexible operation depending on load requirements. Key Specifications: Manufacturer: ABB Type: Unit Substation Transformer Phase: Three-Phase Cooling Class: KNAN / KNAF Primary Voltage (HV): 12,470 V Secondary Voltage (LV): 4160Y / 2402 V Frequency: 60 Hz Ratings: 15,000 / 16,800 kVA (KNAN) 20,000 / 22,400 kVA (KNAF) Temperature Rise: 55/65°C Construction & Features: Natural ester fluid insulated (enhanced fire safety & biodegradable) Dyn1 vector group configuration Unit substation design for industrial power distribution On-load tap changer with multiple voltage adjustment positions UL listed liquid-filled distribution transformer Additional Details: Fluid Volume: 2,462 gallons Impedance: 6.38% Manufacture Date: 10/2023 Made in USA Approx. total weight: ~69,400 lbs *See attached Spec Sheets