Product Description:

The 15.F4.F1G-4I00 belongs to the KEB F4 Combivert Frequency Inverters series. As a frequency inverter, it converts fixed-frequency three-phase line power into a variable output that lets automation equipment run induction or permanent-magnet motors over a controlled speed range. Within an installation, it sits between the plant power source and the motor, allowing control of torque, ramp profiles, and energy consumption. This arrangement also supports smoother starts, controlled acceleration, and more stable speed regulation during changing process loads.

The inverter can deliver an apparent output of 17 kVA, which suits industrial machines that require substantial reactive and active power. During continuous duty, the output phase current is limited to 24 A, while the input side draws a nominal 26.5 A. The maximum motor rating is 11 kW, which suits many mid-frame IEC motors used on conveyors or pumps. For high-resolution torque control, the carrier frequency can be raised to 16 kHz, but operation at that setting reduces thermal headroom, so the permitted stall current is lower than at the standard switching rate. A line conductor cross section of 6 mm² is suitable for these currents and helps limit cable heating during continuous operation.

Protective elements are integrated directly. The line side can be fused at 35 A, and an overcurrent trip activates if 43.2 A is detected to shut the inverter down before semiconductor damage occurs. Dynamic deceleration is handled by the included braking transistor, which requires a braking resistor of at least 22 Ω so regenerated energy can be dissipated safely during stopping. Power lost as heat in normal operation is held to 290 W, so enclosure ventilation must remove that load from the G housing. Field-oriented control maintains motor flux at the rated switching frequency of 8 kHz and at higher carrier settings, helping the drive keep torque response consistent at low speed.