The transformer need to run in parts with relative humidity underneath ninety five% to avoid insulation degradation. Puchaced a reconditioned three phase 30KVA 480^ - 208/120Y dry type basic X-former for an inexpensive price. Shipping was swift and packaging was restricted with all of the KO punched in the past http://myworldgo.com/profile/okok0972/action_id/3407189/show_comments/1