An electrical switch comprising: a frame; a first stationary contact stationary mounted relative to the frame; a second stationary contact stationary mounted relative to the frame; a roll element rotatable around a rotation axis between a first position and a second position relative to the frame, wherein the roll element is adapted to transfer from the first position to the second position in an opening event; and a movable contact mounted to the roll element, and comprising a first contact portion and a second contact portion, wherein in the first position of the roll element the first contact portion is in its first position in which the first contact portion is in contact with the first stationary contact, and the second contact portion is in its first position in which the second contact portion is in contact with the second stationary contact such that the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first contact portion and second contact portion are in their second positions such that the first stationary contact is electrically disconnected from the second stationary contact, wherein there is a first breaking zone between the first stationary contact and the second position of the first contact portion, and a second breaking zone between the second stationary contact and the second position of the second contact portion, wherein the first contact portion and the second contact portion are located on opposite sides of a centre plane perpendicular to the rotation axis, and wherein the movable contact is made of electrically conducting material such that the first contact portion and the second contact portion are electrically conductively connected, characterized in that the electrical switch comprises an isolator system electrically isolating the first breaking zone from the second breaking zone, the centre plane passing through the isolator system, wherein the isolator system is adapted to prevent transfer of electrical arcs from one side of the isolator system to the other during the opening event of the electrical switch. a frame; a first stationary contact stationary mounted relative to the frame; a second stationary contact stationary mounted relative to the frame; a roll element rotatable around a rotation axis between a first position and a second position relative to the frame, wherein the roll element is adapted to transfer from the first position to the second position in an opening event; and a movable contact mounted to the roll element, and comprising a first contact portion and a second contact portion, wherein in the first position of the roll element the first contact portion is in its first position in which the first contact portion is in contact with the first stationary contact, and the second contact portion is in its first position in which the second contact portion is in contact with the second stationary contact such that the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first contact portion and second contact portion are in their second positions such that the first stationary contact is electrically disconnected from the second stationary contact, wherein there is a first breaking zone between the first stationary contact and the second position of the first contact portion, and a second breaking zone between the second stationary contact and the second position of the second contact portion, wherein the first contact portion and the second contact portion are located on opposite sides of a centre plane perpendicular to the rotation axis, and wherein the movable contact is made of electrically conducting material such that the first contact portion and the second contact portion are electrically conductively connected, characterized in that the electrical switch comprises an isolator system electrically isolating the first breaking zone from the second breaking zone, the centre plane passing through the isolator system, wherein the isolator system is adapted to prevent transfer of electrical arcs from one side of the isolator system to the other during the opening event of the electrical switch.