Remote de-energizing of an installation switching device

The invention relates to a trigger unit (1) for attachment to an installation switching device, comprising a coupling apparatus (4) which can take an ON position and a trigger position, and which can be coupled to a trigger apparatus of the installation switching device upon attachment to an installation switching device, wherein the trigger unit (1) comprises a signal current path which contains a hammer armature system (5). Said trigger unit is characterized in that the trigger unit (1) comprises a transmission building block (6), having a movement element (2) which is supported for longitudinal displacement for being coupled to the coupling apparatus (4), a locking member (7) for locking the movement of the movement element (2), a switching member (8) for alternately moving and releasing the movement element (2), a drive member (10) for alternately driving and releasing the switching member (8), wherein the switching member (8) and the locking member (7) are mounted so as to rotate about a common axis and