A system for transient over voltage protection of a three-phase transformer, the system comprising: a dry-type transformer including first, second and third windings, a first surge arrester; a second surge arrester; the first surge arrester and the second surge arrester being series-connected with each other and parallel-connected with the first winding, wherein a connection point between the first surge arrester and the second surge arrester is electrically connected to a location of the first winding; a third surge arrester; a fourth surge arrester; the third surge arrester and the fourth surge arrester being series-connected with each other and parallel connected with the second winding, wherein a connection point between the third surge arrester and the fourth surge arrester is electrically connected to a location of the second winding; a fifth surge arrester; and a sixth surge arrester; the fifth surge arrester and the sixth surge arrester being series-connected with each other and parallel-connected with the third winding, wherein a connection point between the fifth surge arrester and the sixth surge arrester is electrically connected to a location of the third winding, wherein each of the first, second and third windings (102, 104, 106) have first and second ends and the distance from the first end to the second end is length L, wherein the respective connection point is the middle location of the first, second and third windings (102, 104, 106), which is located in a range of from L/4 to 3 L/4, wherein the first, second and third windings are interconnected in a configuration of a delta-connected transformer, the system further comprising: a seventh surge arrester electrically connected at a first end to a connection point between the first and second windings; an eighth surge arrester electrically connected at a first end to a connection point between the first and third windings, and a ninth surge arrester electrically connected at a first end to a connection point between the second and third windings, wherein second ends of said seventh, eighth and ninth surge arresters are each electrically connected to ground, the system further comprising a first capacitor electrically connected in parallel with said seventh surge arrester; a second capacitor electrically connected in parallel with said eighth surge arrester; and a third capacitor electrically connected in parallel with said ninth surge arrester. a dry-type transformer including first, second and third windings, a first surge arrester; a second surge arrester; the first surge arrester and the second surge arrester being series-connected with each other and parallel-connected with the first winding, wherein a connection point between the first surge arrester and the second surge arrester is electrically connected to a location of the first winding; a third surge arrester; a fourth surge arrester; the third surge arrester and the fourth surge arrester being series-connected with each other and parallel connected with the second winding, wherein a connection point between the third surge arrester and the fourth surge arrester is electrically connected to a location of the second winding; a fifth surge arrester; and a sixth surge arrester; the fifth surge arrester and the sixth surge arrester being series-connected with each other and parallel-connected with the third winding, wherein a connection point between the fifth surge arrester and the sixth surge arrester is electrically connected to a location of the third winding, wherein each of the first, second and third windings (102, 104, 106) have first and second ends and the distance from the first end to the second end is length L, wherein the respective connection point is the middle location of the first, second and third windings (102, 104, 106), which is located in a range of from L/4 to 3 L/4, wherein the first, second and third windings are interconnected in a configuration of a delta-connected transformer, the system further comprising: a seventh surge arrester electrically connected at a first end to a connection point between the first and second windings; an eighth surge arrester electrically connected at a first end to a connection point between the first and third windings, and a ninth surge arrester electrically connected at a first end to a connection point between the second and third windings, wherein second ends of said seventh, eighth and ninth surge arresters are each electrically connected to ground, the system further comprising a first capacitor electrically connected in parallel with said seventh surge arrester; a second capacitor electrically connected in parallel with said eighth surge arrester; and a third capacitor electrically connected in parallel with said ninth surge arrester. a seventh surge arrester electrically connected at a first end to a connection point between the first and second windings; an eighth surge arrester electrically connected at a first end to a connection point between the first and third windings, and a ninth surge arrester electrically connected at a first end to a connection point between the second and third windings, wherein second ends of said seventh, eighth and ninth surge arresters are each electrically connected to ground, the system further comprising a first capacitor electrically connected in parallel with said seventh surge arrester; a second capacitor electrically connected in parallel with said eighth surge arrester; and a third capacitor electrically connected in parallel with said ninth surge arrester.