Product Description:

The 19.F4.C1H-4K00 is a variable-frequency inverter produced by KEB within the F4 Combivert Frequency Inverters series. It is designed to regulate three-phase induction motors by converting fixed mains frequency into an adjustable output, so conveyor speeds, pump flow, or spindle rate can match process demands. The unit combines motor control, protection, and a braking transistor in one compact housing for industrial automation use. This type of drive is useful where a fixed-speed motor would limit process flexibility or waste energy during partial-load operation. Because the output frequency can be adjusted, the same machine can run at different operating speeds without mechanical changes.

The analog input is sampled at 10-bit depth, allowing 1,024 discrete voltage levels for reference handling. Internal logic processes parameters with 15-bit digital resolution, providing 32,768 increments of set-point data. That resolution helps the control stage respond to reference changes with smaller adjustment steps instead of coarse jumps. On the power side, the inverter draws a rated phase current of 66 A from the mains and delivers 60 A continuously to the motor, which suits moderate-torque equipment. Its apparent power is 42 kVA, so the supply network must be sized for that load. The carrier frequency is fixed at 16 kHz, which supports quiet motor operation and fine torque modulation.

The drive can operate machines up to 30 kW of mechanical output and can withstand overloads of 90 A for 30 seconds during the startup of high-inertia loads. The heat sink may reach 80 °C at full load, so cabinet airflow or supplemental fans are needed to remove heat effectively. Under normal operation, the inverter dissipates 850 W of power loss, which should be managed within the enclosure. During deceleration, the integrated braking transistor routes regenerated energy to an external resistor instead of allowing that energy to remain on the DC bus. The IP20 enclosure is intended for protected panel installation. Shielded motor cables up to 100 m help maintain electromagnetic compatibility between the inverter and the motor.