Product Description:

The 14.F4.F1E-4004 frequency inverter is manufactured by KEB as part of the F4 Combivert Frequency Inverters series. This controller supplies variable voltage and frequency to a 400 V class motor so speed, acceleration, and braking can be adjusted through the drive’s field-oriented control. The unit serves in automated lines where closed-loop torque regulation and integrated braking energy dissipation are required.

Incoming power is accepted from a three-phase supply, and the inverter draws a nominal input current of 18.1 A. Internally, a braking transistor directs excess regenerative energy to an external resistor so the DC bus voltage stays within safe limits during deceleration. At the output side, the drive delivers a nominal current of 16.5 A and a continuous apparent power of 11 kVA, which establish the thermal rating of the power stage and help with cable sizing. When operating under field-oriented control, the closed-loop algorithm can reach a motor shaft torque of 103.5 Nm for short overload periods. The rated motor circuit uses 400 V line voltage and a rated current of 10.5 A. Together with a power factor of 0.89, these values indicate the real power drawn from the mains and help size protective devices.

When the connected machine runs at the nominal point, the drive supplies a fundamental frequency of 50 Hz that results in 5.5 kW of mechanical power on the shaft. At this operating point, the motor turns at 1440 rpm and maintains a continuous torque of 36.4 Nm, matching the thermal capability of standard IEC frame sizes. Because magnetizing current has already been accounted for in sizing, heat rise in the windings remains moderate and the internal braking transistor intervenes only during deceleration or load reversals. These values can be used to check motor-drive compatibility and set protective thresholds without repeated field measurements.