14.F4.F1G-4I14 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 14.F4.F1G-4I14 frequency inverter belongs to the F4 Combivert Frequency Inverters series and provides a motor power of 7.5 kW with a voltage class of 400 V. It has an apparent power of 11 kVA, an output current of 16.5 A, and features an integrated brake transistor. The inverter supports an IP20 rating, handles input currents up to 18.1 A, and has a maximum mains fuse rating of 25 A.
Internal Product Review
The 14.F4.F1G-4I14 is a KEB F4 Combivert frequency inverter with 7.5 kW motor power and a 400 V voltage class. An integrated brake transistor and 16 kHz rated switching frequency support precise speed control and clean drive response. IP20 protection and 16.5 A output current make this inverter a strong choice for dependable industrial motion control.
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Product Description:
The 14.F4.F1G-4I14 is a frequency inverter built by KEB as part of the F4 Combivert Frequency Inverters series. This unit is installed between the three-phase mains and an asynchronous motor, allowing the machine controller to adjust speed and torque by varying output frequency and voltage. It is used in automated conveyors, pumps, and processing equipment where precise electrical control is required instead of mechanical throttling. This method allows smoother acceleration and steadier operation when load conditions change during normal machine use. It can also improve process consistency by keeping motor speed closer to the commanded value during changing demand.
The drive operates in the 400 V voltage class and draws a nominal input of 18.1 A from the supply. Its inverter stage delivers 16.5 A of output current, corresponding to an apparent power of 11 kVA on the motor side. Conductors up to 4 mm² can be connected at the line terminals, and the input should be protected by a 25 A mains fuse. The IGBT bridge switches at a carrier frequency of 16 kHz; under these conditions, the stall current limit is 12 A, allowing short-term motor locking without immediate overcurrent trips. Internally, heat losses are produced during rated operation, so airflow across the aluminum heat sink is required to keep junction temperatures within limits.
The inverter matches machines equipped with a 7.5 kW motor and is enclosed to IP20, meaning it must be mounted inside a panel for dust protection. A power-electronic brake transistor is already integrated, and it can direct up to 21 A of regenerative current into an external resistor. This arrangement supports controlled deceleration without returning braking energy directly to the supply. For fast stops, the application may use a 39 Ω minimum resistor, while routine deceleration cycles are usually handled with a typical 85 Ω element. Produced heat is transferred to the sink, which may reach a maximum of 90 °C when the converter is delivering full torque and dissipating 260 W. Panel layout should allow clearance around the heat sink because the surface temperature rises substantially during continuous operation.
