Connection device for providing an electrical contact between at least one electrical conductor and a busbar of an electrical connecting contact, having the features: the connection device has the electrical connecting contact between the busbar and at least one spring element; a bearing device for the spring element is formed on the busbar of the connecting contact; the spring element is formed and arranged in an actuable manner on the bearing device in such a way that the spring element can be brought from a first tension state to a second and third tension state; wherein, in the first tension state of the spring element, a freely projecting contact end of the spring element abuts against the busbar and, in the second tension state of the spring element, the conductor is fixed on the busbar by means of the contact end of the spring element and a contact connection for the conductor to the busbar is closed and, in the third tension state of the spring element, the contact connection for the conductor to the busbar is opened; the spring element is a meander-shaped or S-shaped spring having a first and second bend; a first and second bearing portion of the spring element are formed by means of the first and second bend, characterized by: a first and second opposing limb are angled on the busbar; a first and second bearing portion are provided on the busbar of the connecting contact by means of the first and second limb; a first and second bearing pin are provided on the first and second bearing portion; the bearing device for the spring element is formed on the connecting contact by means of the first and second bearing portion and the first and second bearing pin; wherein the first and second bearing pin are arranged in the bend of the first and second bearing portion of the spring element in each case. the connection device has the electrical connecting contact between the busbar and at least one spring element; a bearing device for the spring element is formed on the busbar of the connecting contact; the spring element is formed and arranged in an actuable manner on the bearing device in such a way that the spring element can be brought from a first tension state to a second and third tension state; wherein, in the first tension state of the spring element, a freely projecting contact end of the spring element abuts against the busbar and, in the second tension state of the spring element, the conductor is fixed on the busbar by means of the contact end of the spring element and a contact connection for the conductor to the busbar is closed and, in the third tension state of the spring element, the contact connection for the conductor to the busbar is opened; the spring element is a meander-shaped or S-shaped spring having a first and second bend; a first and second bearing portion of the spring element are formed by means of the first and second bend, characterized by: a first and second opposing limb are angled on the busbar; a first and second bearing portion are provided on the busbar of the connecting contact by means of the first and second limb; a first and second bearing pin are provided on the first and second bearing portion; the bearing device for the spring element is formed on the connecting contact by means of the first and second bearing portion and the first and second bearing pin; wherein the first and second bearing pin are arranged in the bend of the first and second bearing portion of the spring element in each case. a first and second opposing limb are angled on the busbar; a first and second bearing portion are provided on the busbar of the connecting contact by means of the first and second limb; a first and second bearing pin are provided on the first and second bearing portion; the bearing device for the spring element is formed on the connecting contact by means of the first and second bearing portion and the first and second bearing pin; wherein the first and second bearing pin are arranged in the bend of the first and second bearing portion of the spring element in each case.