Alpha 400 DIN, quick-mount assembly kit for installing devices with a row spacing of 125 mm with N/PE rail, with longitudinal beams, H=600 B=500. The Alpha installation distributors are a complete system of wall and floor distributors for the installation of devices up to 1250 A. The system concept is key. The Alpha distribution systems are tested according to IEC 61439 and are based on a common platform structure with extensive designs up to 1250 A. Due to the platform structure and modular design, device-specific installation kits can be integrated into various distributor variants. This facilitates planning and assembly. The configuration is carried out individually and project-specifically. The Simaris Configuration software supports the planning and documentation of the Alpha energy distributors and installation distributors. Siemens Alpha installation distributors are particularly characterized by their simple and quick assembly.