PLUG-IN APPLIANCE COMBINATION

The presnet invention relates to a plug-in appliance combination with an appliance base and a plug-in module. The appliance base has a base housing with a recess for receiving the plug-in module, a linkage terminal for a conductor of a power grid to be protected, and a plug-in contact. The plug-in module has a plug housing, A protective element arranged in the plug-in housing, and a linkage plug-in contact corresponding to the plug-in contact. In the apparaut combination, unlocking and replacement of the plug-in module are executed thereby. At least one recess delimiting wall of the appliance base is provided with a flexible locking arm, at least one end side of the plug housing is provided with a locking recess, an unlocking element is arranged on the end side, wherein in the fully plugged state of the plug-in module in the recess, the locking arm is not deflected in a first, lower position of the unlocking element, so that the free end of the locking arm in the detent recess; engages, during the locking arm is deflected in a second, upper position of the unlocking element so that the free end of the latching arm does not extend into the locking recess.