Product Description:

The 12.F0.R11-4A09 is a drive-mounted inverter rack supplied by KEB within the F0 Combivert Control Cabinets series. The unit forms the core of a multi-axis control cabinet, converting three-phase mains power into regulated outputs for asynchronous or synchronous motors used in conveyors, winders, and compact machine modules. By integrating gating electronics with protective fusing, it provides a centralized enclosure that simplifies installation inside industrial automation panels.

Control electronics are safeguarded with a 0.4 A micro-fuse, while the logic section draws only 30 mA from the internal supply. That supply is stabilized at +15 V, and a separate reference signal of +10 V is available for analog speed setpoints. During rated operation the rack dissipates 115 W of heat, a figure that determines enclosure airflow requirements. Motor speed regulation is possible up to a maximum output frequency of 408 Hz, so high-speed spindles can be driven without external step-up gearboxes. Line power is presented on three phases, and minimum conductor size for those feeds is 2.5 mm² to limit voltage drop.

The power channel is dimensioned for a continuous motor rating of 4 kW and a corresponding inverter output current of 9.5 A; together they translate to an apparent output of 6.6 kVA under sinusoidal conditions. Upstream protective devices can be selected up to 20 A without exceeding the converter’s semiconductor limits. Reliable performance is maintained up to 3000 m installation altitude and within 95 % relative humidity, provided condensation is avoided. The enclosure carries an IP20 protection rating, weighs 4 kg, and must be installed inside a ventilated cabinet frame. For code compliance wiring must remain within the stated fuse size and the three-phase bus conductors must respect the minimum cross-section.