An electrical connector for connecting a first conductor with a second conductor, comprising: a first connecting part comprising a first portion and a second portion, the first portion of the first connecting part comprising towards one extremity of the first portion a hollow right cylinder portion that is opened along the axis of the cylinder, the cylinder comprising towards a terminal end of the cylinder at least one protruding portion extending from an outer wall of the cylinder in a radial direction; the cylinder being adapted for receiving the first conductor, and the second portion of the first connecting part comprising an opening for receiving an extremity of the second conductor; a second connecting part (200, 300, 400) which is adapted to slip over at least the first portion of the first connecting part; wherein the first connecting part and second connecting part (200, 300, 400) each comprise a means configured to prevent a decoupling of the second connecting part (200, 300, 400) from the first connecting part when the first connecting part and the second connecting part (200, 300, 400) are in a first predetermined relative position to each other; and to allow a decoupling when the first connecting part and second connecting part (200, 300, 400) are in a second predetermined relative position to each other; characterized in that the second connecting part (200, 300, 400) comprises an essentially circular ring shaped through-hole (204, 304, 404) mating an outer radius of the cylinder and comprises at least one groove (206, 208, 306) in an inner surface extending along the axis of the ring shaped through-hole (204, 304, 404); and wherein the second connecting part (200, 300, 400) is further comprising a positioning ensuring means for keeping the first and the second (200, 300, 400) connecting parts in the first predetermined position; the positioning ensuring means comprising a screw positioned in a threaded through-hole extending essentially in a radial direction of the ring shaped through-hole (204, 304, 404) inner surface of the second connecting part (200, 300, 400) and ensuring the first predetermined position when the screw extends by a predetermined length into an inner volume of the ring shaped through-hole (204, 304, 404). a first connecting part comprising a first portion and a second portion, the first portion of the first connecting part comprising towards one extremity of the first portion a hollow right cylinder portion that is opened along the axis of the cylinder, the cylinder comprising towards a terminal end of the cylinder at least one protruding portion extending from an outer wall of the cylinder in a radial direction; the cylinder being adapted for receiving the first conductor, and the second portion of the first connecting part comprising an opening for receiving an extremity of the second conductor; the first portion of the first connecting part comprising towards one extremity of the first portion a hollow right cylinder portion that is opened along the axis of the cylinder, the cylinder comprising towards a terminal end of the cylinder at least one protruding portion extending from an outer wall of the cylinder in a radial direction; the cylinder being adapted for receiving the first conductor, and the second portion of the first connecting part comprising an opening for receiving an extremity of the second conductor; a second connecting part (200, 300, 400) which is adapted to slip over at least the first portion of the first connecting part; wherein the first connecting part and second connecting part (200, 300, 400) each comprise a means configured to prevent a decoupling of the second connecting part (200, 300, 400) from the first connecting part when the first connecting part and the second connecting part (200, 300, 400) are in a first predetermined relative position to each other; and to allow a decoupling when the first connecting part and second connecting part (200, 300, 400) are in a second predetermined relative position to each other; characterized in that the second connecting part (200, 300, 400) comprises an essentially circular ring shaped through-hole (204, 304, 404) mating an outer radius of the cylinder and comprises at least one groove (206, 208, 306) in an inner surface extending along the axis of the ring shaped through-hole (204, 304, 404); and wherein the second connecting part (200, 300, 400) is further comprising a positioning ensuring means for keeping the first and the second (200, 300, 400) connecting parts in the first predetermined position; the positioning ensuring means comprising a screw positioned in a threaded through-hole extending essentially in a radial direction of the ring shaped through-hole (204, 304, 404) inner surface of the second connecting part (200, 300, 400) and ensuring the first predetermined position when the screw extends by a predetermined length into an inner volume of the ring shaped through-hole (204, 304, 404).