17.F4.F1H-4019 KEB
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The KEB 17.F4.F1H-4019 is part of the F4 Combivert Frequency Inverters series and has a rated motor power of 18.5 kW with an output nominal current of 42 Amps. This inverter includes a housing type H, three input phases, and supports a rated mains voltage of 400 Volts. It offers a maximum operating frequency of 16 kHz and features an internal braking transistor.
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Product Description:
The 17.F4.F1H-4019 is an AC frequency inverter produced by KEB for the F4 Combivert Frequency Inverters series. It mounts in an H-style housing that provides airflow paths for high-power electronics while fitting standard control cabinets. By rectifying the incoming supply and modulating the resulting DC power, the unit delivers variable output frequency and voltage so production motors can match changing process demands without mechanical throttling. An internal braking transistor supports controlled energy dissipation during rapid deceleration. The inverter accepts motor cable conductors up to 16 mm², helping to limit conductor heating and voltage drop on long cable runs.
The input is designed for a three-phase 400 V supply and draws a continuous 46 A under rated operating conditions. On the output side, silicon IGBTs provide a continuous 42 A to the motor terminals. This output current corresponds to an apparent power of 29 kVA. When the inverter is paired with a properly ventilated motor, it supports a shaft output of 18.5 kW. A 63 A mains fuse protects the upstream conductors against short-circuit current, while the selected line conductor size must be coordinated with the fuse’s let-through energy. Brief torque peaks are managed by the control algorithm, but prolonged stall current is restricted to protect the motor windings and inverter power stage.
The switching devices operate at a rated carrier frequency of 8 kHz, while a maximum setting of 16 kHz supports quieter motor operation when sufficient thermal capacity is available. During a prolonged stall, the current limit is 30 A at the rated carrier frequency and 13.5 A at the maximum carrier frequency. At full load, the converter produces internal losses of 470 W, and this heat must be removed by the cabinet ventilation system to keep semiconductor junction temperatures within operating limits. The H-style housing directs warm air toward an external duct to improve heat removal from the power electronics. Dynamic braking increases heat generation during rapid stops, so the cabinet must maintain adequate airflow around the inverter and its exhaust path.
