Product Description:

The 12.F0.R31-3429 cabinet is a variable-frequency inverter supplied by KEB within the F0 Combivert Control Cabinets series. It houses power electronics that convert a three-phase mains supply into a controlled AC output for induction or synchronous motors used in conveyors, pumps, and other automated machinery. By integrating protective fusing and drive control in one enclosure, it simplifies installation in control rooms and machine frames. It also centralizes power conversion and motor control inside a dedicated cabinet assembly.

The drive accepts a nominal three-phase input from 305 V to 500 V, allowing operation on 400 V systems with normal supply variation. Internally, a 0.4 A control fuse protects auxiliary circuits, while both the mains and the intermediate DC link are protected by 20 A fuses. Rated output is 6.6 kVA, corresponding to a continuous load current of 9.5 A at the terminals. An output frequency ceiling of 408 Hz allows higher motor speeds when required, and the cabinet can drive motors up to 4 kW within this operating range. This gives the inverter flexibility for equipment that needs broad speed adjustment without exceeding its current capacity. Field wiring must use conductors no smaller than 2.5 mm², and the design assumes a balanced supply from three line phases.

Continuous operation produces 115 W of heat, so the installation must provide panel airflow or ducting to remove it. The housing has an IP20 rating, which means it should be mounted inside a larger enclosure if dust or moisture exposure is expected. Operation is permitted at altitudes up to 3000 m, and the electronics tolerate ambient humidity up to 95 % when condensation is avoided. Adequate ventilation and dry mounting conditions help the cabinet maintain stable operation in enclosed industrial installations.