Abstract: A transformer installation including at least one non-liquid immersed transformer having a magnetic core including at least two core legs each having a winding axis. The transformer further includes at least two coil windings wound around at least one of the core legs of the magnetic core about the winding axis. The transformer installation further includes at least one coil cooling tube defining a coil cooling channel for guiding a dielectric cooling fluid. The at least one cooling tube is wound about at least one of the at least two coil windings. The transformer installation further includes at least one core cooling channel arranged within the core. The core cooling channel is configured to guide a dielectric cooling fluid through the core.