Connection arrangement for fastening an electrical contact element to an electrical conductor

A connection arrangement, comprising:

• a conductor rail having a through hole;
• an electrical contact element;
• an expansion ferrule insertable in a slidable manner into a central opening of the electrical contact element;
• a clamping contact ferrule receiving the expansion ferrule and the electrical contact element, the clamping contact ferrule has a conductor portion inserted into the through hole of the conductor rail and a contacting portion extending from the conductor portion and positioned above the conductor rail along a longitudinal axis;
• and
• an expansion element inserted into the expansion ferrule along the longitudinal axis, the electrical contact element is positioned in a contact receptacle defined between the expansion ferrule and the contacting portion of the clamping contact ferrule in a direction perpendicular to the longitudinal axis and is slidable in the contact receptacle with respect to the expansion ferrule and the clamping contact ferrule along the longitudinal axis, the expansion ferrule is expanded when the expansion element is fully inserted into the expansion ferrule to clamp the electrical contact element in the contact receptacle between the expansion ferrule and the clamping contact ferrule and fasten the electrical contact element to the conductor rail.