Disconnection device for a withdrawable unit comprising - a contact module with an electrical contact; - a shaft arranged to rotate around a rotation axis; - a member, wherein the contact module is fastened to the member, the member being arranged to be moveable parallel to a contacting direction for connecting and disconnecting the electrical contact, - a slider arranged to be driven by the shaft in a direction parallel to the rotation axis by the rotation of the shaft, the member comprising a slot comprising a first edge and a second edge facing the first edge, the angles between the first edge and the rotation axis and the contacting direction and the angles between the second edge and the rotation axis and the contacting direction having values larger than zero, such that driving of the shaft results in pushing the member parallel to the contacting direction; and wherein the slider is arranged to engage with at least one of the first edge and the second edge while being driven in the direction parallel to the rotation axis, the disconnection device further comprising: - an auxiliary contact module with an auxiliary electrical contact; - an auxiliary member, wherein the auxiliary contact module is fastened to the auxiliary member, the auxiliary member being arranged to be moveable parallel to the contacting direction for connecting or disconnecting the auxiliary electrical contact, the auxiliary member comprising an auxiliary slot comprising a auxiliary first edge and an auxiliary second edge facing the auxiliary first edge, both the auxiliary first edge and the auxiliary second edge having angles to both the rotation axis and the contacting direction with values larger than zero, such that driving of the shaft results in pushing the auxiliary member parallel to the contacting direction; and - an auxiliary slider arranged to be driven by the shaft in a direction parallel to the rotation axis by the rotation of the shaft, wherein the auxiliary slider is arranged to engage with at least one of the auxiliary first edge and the auxiliary second edge while being driven in the direction parallel to the rotation axis. - a contact module with an electrical contact; - a shaft arranged to rotate around a rotation axis; - a member, wherein the contact module is fastened to the member, the member being arranged to be moveable parallel to a contacting direction for connecting and disconnecting the electrical contact, - a slider arranged to be driven by the shaft in a direction parallel to the rotation axis by the rotation of the shaft, the member comprising a slot comprising a first edge and a second edge facing the first edge, the angles between the first edge and the rotation axis and the contacting direction and the angles between the second edge and the rotation axis and the contacting direction having values larger than zero, such that driving of the shaft results in pushing the member parallel to the contacting direction; and wherein the slider is arranged to engage with at least one of the first edge and the second edge while being driven in the direction parallel to the rotation axis, the disconnection device further comprising: - an auxiliary contact module with an auxiliary electrical contact; - an auxiliary member, wherein the auxiliary contact module is fastened to the auxiliary member, the auxiliary member being arranged to be moveable parallel to the contacting direction for connecting or disconnecting the auxiliary electrical contact, the auxiliary member comprising an auxiliary slot comprising a auxiliary first edge and an auxiliary second edge facing the auxiliary first edge, both the auxiliary first edge and the auxiliary second edge having angles to both the rotation axis and the contacting direction with values larger than zero, such that driving of the shaft results in pushing the auxiliary member parallel to the contacting direction; and - an auxiliary slider arranged to be driven by the shaft in a direction parallel to the rotation axis by the rotation of the shaft, wherein the auxiliary slider is arranged to engage with at least one of the auxiliary first edge and the auxiliary second edge while being driven in the direction parallel to the rotation axis.