Product Description:

The 19.F4.C0H-3421 is a frequency inverter from the F4 Combivert Frequency Inverters series manufactured by KEB. It is intended for cabinet installation where it converts fixed-frequency three-phase mains power into a variable output that regulates induction motor speed in automated machinery. The unit belongs to the 400 V supply class and is delivered without optional accessories, giving the system a compact control element for conveyor, pump, or fan applications. This arrangement allows the drive to adjust motor speed smoothly without relying on mechanical throttling or stepped gearing.

This inverter accepts a 3-phase AC supply and communicates with higher-level controls through the InterBus fieldbus interface. When connected to a motor, it can drive up to 30 kW of mechanical output while drawing a nominal input current of 66 A. On the output side, the continuous current capability is 60 A, and the apparent power reaches 42 kVA at rated conditions. The internal IGBTs switch at 4 kHz, balancing electromagnetic compatibility with thermal loading. A maximum mains fuse size of 80 A protects the supply, and the line terminals accommodate conductors up to 25 mm². Overcurrent supervision trips at 108 A, while short-time overloads are tolerated briefly during acceleration demands. The drive also supports shielded motor leads, which helps limit conducted noise in nearby control wiring.

The housing has an IP20 protection class, so the inverter must be installed inside a closed electrical enclosure. The permitted shielded motor cable length is 100 m without derating, which supports remote motor placement on large machines or separated machine sections. During transient load peaks, the inverter can supply a short-time current of 90 A, providing added torque for startup or step-change events. Its compact construction simplifies panel layout, and the lack of accessory modules helps reduce cabinet depth for dense multi-drive arrangements.