22.F4.F1R-3440 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 22.F4.F1R-3440 is a field-oriented frequency inverter from the F4 Combivert Frequency Inverters series with a protection rating of IP20. It supports a maximum rated motor power of 55 kW and operates at a nominal input current of 127 Amps. The inverter includes a brake transistor and works at a voltage class of 400 Volts.
Internal Product Review
The 22.F4.F1R-3440 is a KEB F4 Combivert frequency inverter with field-oriented control and a 400 V class design. Three-phase input and 115 A nominal output current give the drive stable, precise behavior in demanding motor applications. An included brake transistor improves deceleration performance, and 55 kW motor capability makes this inverter a strong choice for higher-load systems.
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Product Description:
The 22.F4.F1R-3440 is a frequency inverter manufactured by KEB for the F4 Combivert Frequency Inverters series. It converts constant-frequency three-phase mains power into the variable output required to control industrial AC motors in conveyors, pumps, and fans. Within an automation cell, the device sits between the supply and the motor, adjusting voltage and frequency so that motion commands from a supervisory controller are translated into controlled mechanical torque.
The inverter uses field-oriented control to align stator current with rotor flux, improving response at low speed and reducing harmonic losses. It accepts a three-phase input, and the wiring lugs accommodate conductors up to 50 mm², while the nominal input current is 127 A during continuous operation. A built-in brake transistor directs regenerated energy to an external 8.6 Ω braking resistor for rapid deceleration. For connected motors, the unit can provide a maximum rated mechanical output of 55 kW with an output nominal current of 115 A. Switching devices operate at 8 kHz, producing smoother waveforms at the cost of a constant heat dissipation of 1500 W. The open-style housing carries an IP20 protection rating, so it must be installed inside a control cabinet.
During transient events, the power stage can furnish a short-time current of 172.5 A, supporting acceleration or load surges without dipping below the commanded speed. The electrical section is rated for an apparent output of 80 kVA, and upstream protection is provided by a 160 A mains fuse to clear faults rapidly. Operation is classified in the 400 V voltage class, and the drive trips at an overcurrent threshold of 207 A to protect the IGBTs. This combination suits high-inertia conveyors and centrifugal fans that require frequent, controlled cycling.
