Installation device having power-engineering or building-services modules, and method for removing a module from an installation device of this type

An installation device comprising power-engineering or building-services-engineering modules (16), which comprises at least two side walls (12) and a removable front cover (14) which enclose a plurality of stackable modules (16), wherein the side walls (12) have a frame (26), two longitudinal rails (36) arranged therein, and a transverse rail (44), wherein the longitudinal rails (36) are arranged along the corners of the modules (16) remaining in the device for servicing of a module (16′), in order to secure the one or more modules (16) arranged above the module (16′) to be serviced, wherein the two frames (26) are arranged along two longitudinal rails (36) on the front side and can be connected, via pulleys (42) attached to the upper frame segment (30), to the transverse rails (44), on which the module (16′) to be serviced rests, so that said module is removable from the installation device (10) once the one or more modules (16) arranged above the module (16′) to be serviced is/are secured to the longitudinal rails (36).