Three Phase Oil Immersed Transformer for Utility Grid is used in public power networks where balanced three-phase voltage is required for substations, feeders, industrial customers, and community distribution systems. The oil immersed structure provides effective cooling and insulation for continuous load operation. Three Phase Oil Immersed Transformer for Utility Grid can be configured with Dyn11 or Yyn0 vector groups, 6kV to 35kV service voltage, copper or aluminum windings, CRGO core, ONAN cooling, tap changer, sealed oil tank, and protection devices for utility distribution requirements.