A center break switch having a contact system for electrical current conduction and bus transfer switching, the contact system comprising: two moving contacts , wherein a first moving contact comprises a finger contact , and a second moving contact comprises a fist contact , wherein each moving contact comprises a contact for bus transfer switching, wherein during engagement, the two contacts for bus transfer switching engage prior to the engagement of the finger contact with the fist contact, wherein a first contact of the two contacts for bus transfer switching, is a contact finger comprising a spherical contacting element provided at an end of an auxiliary finger formed with a cylindrical rod , wherein the auxiliary finger is attached with a first supporting base with a spring , wherein the first supporting base is mounted on the corresponding moving contact, characterised in that the attachment is such that the cylindrical rod turns according to a turning movement of the corresponding moving contact, and the cylindrical rod moves relative to the first supporting base along a first axis (AA') on being pushed by a second contact of the two contacts during switching, and wherein the second contact of the two contacts for bus transfer switching, comprises a rectangular contacting element , wherein the second contact is attached with a second supporting base mounted on the corresponding moving contact, wherein the attachment is such that the second contact turns according to the movement of the corresponding moving contact, and wherein the rectangular contacting element is positioned to engage with the spherical contacting element during switching for the bus transfer, and stay in contact with the spherical contacting element when the finger contact is engaged with the fist contact for electrical current conduction. two moving contacts , wherein a first moving contact comprises a finger contact , and a second moving contact comprises a fist contact , wherein each moving contact comprises a contact for bus transfer switching, wherein during engagement, the two contacts for bus transfer switching engage prior to the engagement of the finger contact with the fist contact, wherein a first contact of the two contacts for bus transfer switching, is a contact finger comprising a spherical contacting element provided at an end of an auxiliary finger formed with a cylindrical rod , wherein the auxiliary finger is attached with a first supporting base with a spring , wherein the first supporting base is mounted on the corresponding moving contact, characterised in that the attachment is such that the cylindrical rod turns according to a turning movement of the corresponding moving contact, and the cylindrical rod moves relative to the first supporting base along a first axis (AA') on being pushed by a second contact of the two contacts during switching, and wherein the second contact of the two contacts for bus transfer switching, comprises a rectangular contacting element , wherein the second contact is attached with a second supporting base mounted on the corresponding moving contact, wherein the attachment is such that the second contact turns according to the movement of the corresponding moving contact, and wherein the rectangular contacting element is positioned to engage with the spherical contacting element during switching for the bus transfer, and stay in contact with the spherical contacting element when the finger contact is engaged with the fist contact for electrical current conduction. <EOS>