Motor Modules Booksize format are installed in the factory as Booksize Cabinet Kits in Booksize Base Cabinets. This complete unit contains all of the components necessary for operation.

Several Booksize Cabinet Kits can be installed in one Booksize Base Cabinet, depending on the installation width requirements, which in turn depend on the power rating. The number of Booksize Cabinet Kits that can be installed in a Booksize Base Cabinet is determined solely on the basis of the available cabinet width. By changing the way in which the cabinet width is used (i.e. the equipment that is installed), it can be adapted to suit system requirements.

Each Motor Module is connected separately to the DC busbar of the SINAMICS S120 Cabinet Module via a separate fuse switch disconnector with integrated fuses. The DC connecting busbar integrated in the units is not used.

The basic version of the Booksize Cabinet Kit comprises the following components:

• Motor Module in booksize format
• Fuse switch disconnector for each Motor Module installed
• Customer interface -X55.1 located in the connection area of the Booksize Base Cabinet
• Shield connection plate
• Complete electrical connection to the Booksize Base Cabinet interfaces

The Booksize Base Cabinets can be operated up to and including IP54 degree of protection without additional temperature derating. However, some values need to be taken into account that differ from those of the chassis format. For derating data, see System overview > Characteristic curves.