12.F4.F1D-3480 KEB
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The KEB 12.F4.F1D-3480 is a frequency inverter from the F4 Combivert Frequency Inverters series, with a rated motor power of 4 kW and a voltage class of 400 V. It supports three-phase input, has a rated input current of 10.5 A, and can handle a peak current of 17.1 A. The inverter features field-oriented control and a carrier frequency of 16 kHz, with an output nominal power of 6.6 kVA.
Internal Product Review
The 12.F4.F1D-3480 is a KEB F4 Combivert frequency inverter designed for precise drive performance, featuring field-oriented control and a 400 V class design. Rated for 4 kW motor power and a 16 kHz carrier frequency, the inverter delivers smooth operation and strong application flexibility.
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Product Description:
The 12.F4.F1D-3480 frequency inverter is manufactured by KEB and belongs to the F4 Combivert Frequency Inverters series. In industrial automation, a device of this type modulates the voltage and frequency supplied to an AC motor so that speed, acceleration, and torque follow command values issued by a PLC or motion controller. By placing this electronic stage between the power supply and the machine, the system gains tighter control over cycle times, positioning accuracy, and energy consumption across conveyor lines, fan arrays, and general-purpose production equipment.
The unit operates in the 400 V class and is designed for a three-phase power connection. Inside its IGBT bridge, the PWM carrier is set to 16 kHz, which reduces audible motor noise while keeping switching losses manageable. Under nominal conditions, it draws 10.5 A from the supply and delivers 9.5 A to the motor, corresponding to an apparent output of 6.6 kVA. Field-oriented control algorithms adjust the stator flux vector in real time, supporting smooth torque down to zero speed. With a recommended cable section of 2.5 mm² and a rated motor power of 4 kW, the inverter matches compact asynchronous machines used in packaging or material-handling cells.
A programmable overcurrent trip activates at 20.9 A, yet the hardware can tolerate a transient drive demand of 17.1 A peak without interruption. Upstream protection is satisfied when the feeder is limited by a 20 A input fuse. Continuous switching losses equal 130 W, a value used for enclosure heat calculations. When shielded motor cable lengths up to 100 m are installed, the integrated filters maintain acceptable dV/dt levels. Thermal headroom is monitored against a Toh temperature of 73 °C to help avoid insulation stress, and the topology keeps current symmetry during balanced and unbalanced load steps.
