20.F6.K13-3421 KEB
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The KEB 20.F6.K13-3421 inverter belongs to the F6 Combivert Inverter Drives series and is rated for 37 kW motor power with a rated output current of 75 Amps and output power of 52 kVA. It features an integrated braking transistor, multi-encoder and CAN interfaces, and supports VARAN fieldbus communication. The unit measures 340 by 170 by 261 mm, is air-cooled, and has an IP20 protection rating.
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Product Description:
The 20.F6.K13-3421 is an inverter drive produced by KEB for the F6 Combivert Inverter Drives series. Designed for cabinet mounting, the unit converts three-phase mains power into a variable-frequency output that regulates induction or synchronous motors in automated machinery. By integrating power, control, and safety functions, the product provides a single-axis solution for conveyors, pumps, and processing lines within industrial automation.
Its power stage accepts a three-phase 400 V AC/DC input, which aligns with common plant distribution systems and removes the need for external transformers. At this supply voltage, the drive supports motors up to 37 kW, delivering continuous shaft power for medium-sized production equipment. The inverter can source up to 75 A of output current, while the apparent power at the terminals reaches 52 kVA. A switching frequency of 2 kHz is preset, balancing acoustic noise with manageable semiconductor losses. An integrated braking transistor dissipates regenerated energy through a matched resistor. The air-cooled heat sink removes internal heat without requiring external liquid circuits. The unit measures 340 × 170 × 261 mm, allowing placement in control panels.
Operational safeguards include the drive’s STO function, which removes power to the motor without relying on external contactors. The electronics are enclosed in an IP20 housing, so installation in a closed cabinet protects the system from dust and incidental contact. Dynamic events are managed by a software current ceiling of 150% of nominal current and a hardware turn-off threshold of 180%; these limits permit short overloads while protecting the power devices. Real-time control and diagnostics are available through an integrated CAN bus, a VARAN fieldbus port, and a multi-encoder interface. The feedback interface accepts resolver, EnDat, or incremental encoder signals. These communication and feedback channels allow the inverter to coordinate with PLCs and maintain accurate speed or torque control.
