A transformer installation (90; 290), comprising: at least one non-liquid immersed transformer (100; 200; 300), comprising: a magnetic core (104; 204) comprising at least two core legs (110, 111, 112; 210, 211, 212) each having a winding axis; at least two coil windings (115, 120) wound around at least one of the core legs (110, 111, 112; 210, 211, 212) of the magnetic core (104; 204) about the winding axis; at least one coil cooling tube (125, 130) defining a coil cooling channel (126, 131) for guiding a dielectric cooling fluid, wherein the at least one cooling tube (125, 130) is wound about at least one of the at least two coil windings (115, 120); at least one core cooling channel arranged within the core, the core cooling channel being configured to guide a dielectric cooling fluid through the core; at least one heat exchanging device (145; 345) fluidically connected to the transformer, wherein the heat exchanging device (145; 345) is arranged outside of and distinct from the transformer (100; 300); and at least one intermediate heat exchanging device arranged outside of the transformer and fluidically connected to the heat exchanging device via a coolant feed pipe and a coolant return pipe and to the transformer, wherein the intermediate heat exchanging device is configured to transfer heat absorbed from the transformer by the dielectric cooling fluid to a transfer medium and guide the transfer medium to the heat exchanging device to dissipate heat absorbed from the transformer to the environment. at least one non-liquid immersed transformer (100; 200; 300), comprising: a magnetic core (104; 204) comprising at least two core legs (110, 111, 112; 210, 211, 212) each having a winding axis; at least two coil windings (115, 120) wound around at least one of the core legs (110, 111, 112; 210, 211, 212) of the magnetic core (104; 204) about the winding axis; a magnetic core (104; 204) comprising at least two core legs (110, 111, 112; 210, 211, 212) each having a winding axis; at least two coil windings (115, 120) wound around at least one of the core legs (110, 111, 112; 210, 211, 212) of the magnetic core (104; 204) about the winding axis; at least one coil cooling tube (125, 130) defining a coil cooling channel (126, 131) for guiding a dielectric cooling fluid, wherein the at least one cooling tube (125, 130) is wound about at least one of the at least two coil windings (115, 120); at least one core cooling channel arranged within the core, the core cooling channel being configured to guide a dielectric cooling fluid through the core; at least one heat exchanging device (145; 345) fluidically connected to the transformer, wherein the heat exchanging device (145; 345) is arranged outside of and distinct from the transformer (100; 300); and at least one intermediate heat exchanging device arranged outside of the transformer and fluidically connected to the heat exchanging device via a coolant feed pipe and a coolant return pipe and to the transformer, wherein the intermediate heat exchanging device is configured to transfer heat absorbed from the transformer by the dielectric cooling fluid to a transfer medium and guide the transfer medium to the heat exchanging device to dissipate heat absorbed from the transformer to the environment.