Abstract: An electrical contact element for electrically contacting a mating contact element includes: a plurality of contact lamellae which are arranged around a plug opening into which a mating contact element is pluggable along a plug direction and which together form a groove that encircles the contact lamellae around the plug direction; and a spring element that is arranged on the groove and engages the contact lamellae to provide an elastic clamping force on the contact lamellae. The contact lamellae each have an inner surface which faces the plug opening and is straight in cross section transversely to the plug direction.

Abstract: A plug connector part for electrical connection to a counter plug connector part includes: a housing; and a plurality of contacts arranged on the housing such that the plurality of contacts are electrically contactable from different plugging directions by counter contacts of the counter plug connector part. An angular location of the contacts relative to the housing is fixed.

Abstract: An electrical contact element for electrically contacting a mating contact element includes: a plurality of contact lamellae which are arranged around a plug opening into which a mating contact element is pluggable along a plug direction and which together form a groove that encircles the contact lamellae around the plug direction; and a spring element that is arranged on the groove and engages the contact lamellae to provide an elastic clamping force on the contact lamellae. The contact lamellae each have an inner surface which faces the plug opening and is straight in cross section transversely to the plug direction.

Abstract: A plug connector, having a housing that has at least one slot for accommodating an exchangeable function module. The housing is configured for accommodating a supply unit and/or a locking unit in order to fasten the function module to the housing in a form-fit and/or force-fit manner.

Abstract: A connection terminal for connecting at least one conductor to a current bar, which is accommodated on a mount, in an electrically contacting manner, includes at least one clamping spring for applying a clamping force, the at least one clamping spring including a pivotable clamping lever for clamping the conductor. The clamping spring has a first leg and at least a second leg, is hingedly coupled to the clamping lever by the first leg, and is hingedly coupled to an auxiliary lever by the second leg, the clamping lever and the auxiliary lever being arranged pivotally on the mount.