Transformers 1500 KVA Rex Magnetics Transformers Outdoor application. Voltage 13,800 DELTA TO 480/277 WYE, 60 HZ rating, New Surplus/ Unused Transformers with Heavy Duty Outdoor NEMA 3R Ventilated Outdoor Enclosure. Year of Manufacture 2013, Seven (7) Transformers Available from Cancelled Project.