A transformer arrangement comprising: a transformer having a winding; a surge arrester arrangement configured to be connected to the winding of the transformer, and wherein the surge arrester arrangement comprises a surge arrester arranged to be connected across at least a section of the winding of the transformer and a switch, and wherein the switch is operable between a closed state and an open state, such that in the closed state, the surge arrester is electrically connected across at least the section of the winding of the transformer, and in the open state, the surge arrester is electrically disconnected from at least the section of the winding of the transformer, characterized in that the surge arrester arrangement further comprises: at least one further surge arrester arranged to be connected across at least one further section of the winding of the transformer; at least one further switch; and wherein the at least one further switch, is operable between a closed state and an open state, such that in the closed state the at least one further surge arrester is electrically connected across the at least one further section of the winding of the transformer, and in the open state, the at least one further surge arrester is electrically disconnected from the at least one further section of the winding of the transformer. a transformer having a winding; a surge arrester arrangement configured to be connected to the winding of the transformer, and wherein the surge arrester arrangement comprises a surge arrester arranged to be connected across at least a section of the winding of the transformer and a switch, and wherein the switch is operable between a closed state and an open state, such that in the closed state, the surge arrester is electrically connected across at least the section of the winding of the transformer, and in the open state, the surge arrester is electrically disconnected from at least the section of the winding of the transformer, characterized in that the surge arrester arrangement further comprises: at least one further surge arrester arranged to be connected across at least one further section of the winding of the transformer; at least one further switch; and wherein the at least one further switch, is operable between a closed state and an open state, such that in the closed state the at least one further surge arrester is electrically connected across the at least one further section of the winding of the transformer, and in the open state, the at least one further surge arrester is electrically disconnected from the at least one further section of the winding of the transformer. at least one further surge arrester arranged to be connected across at least one further section of the winding of the transformer; at least one further switch; and wherein the at least one further switch, is operable between a closed state and an open state, such that in the closed state the at least one further surge arrester is electrically connected across the at least one further section of the winding of the transformer, and in the open state, the at least one further surge arrester is electrically disconnected from the at least one further section of the winding of the transformer.