The oil immersion technologies makes sure remarkable cooling and insulation, enabling the transformer to work proficiently under a variety of load circumstances. This design also contributes to an extended lifespan and reduced maintenance requirements as compared to dry-type alternate options. Puchaced a reconditioned 3 phase 30KVA 480^ - 208/120Y dry https://www.dostally.com/post/344845_these-transformers-are-pivotal-in-stepping-down-voltage-from-medium-voltage-dist.html