A transformer system includes a transformer and a transformer tank housing the transformer in a bath of a coolant; and a plurality of radiator systems operative to transfer heat from the coolant, each radiator system being in fluid communication with the transformer tank. The transformer system also includes means for determining an occurrence of a potential coolant leak in one or more radiator system of the plurality of radiator systems; and means for isolating only radiator systems of the plurality of radiator systems that are leaking, in response to a determination of the occurrence of the potential coolant leak.