FC-301P18KT4131B3699 Danfoss
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The FC-301P18KT4131B3699 is an automation drive from Danfoss, part of the VLT FC 301 Automation Drives series. It offers a power rating of 18.5 kW and operates with three-phase power at a mains voltage of 380 to 480 VAC. This unit achieves an efficiency of 0.98 at rated current and has a maximum output frequency of 590 Hz.
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Product Description:
The FC-301P18KT4131B3699 is an AC variable frequency drive produced by Danfoss for the VLT FC 301 Automation Drives series. The unit converts fixed three-phase mains power into a modulated output so plant controllers can vary induction motor speed on conveyors, pumps, and general machinery. By controlling both voltage and frequency, it matches motor torque to process demand, lowering energy consumption and reducing mechanical stress in industrial automation lines. The compact housing is intended for cabinet mounting in OEM panels.
Under standard duty, the drive provides a motor output rating of 18.5 kW, equivalent to 25 HP, while operating from a three-phase supply of 380–480 VAC. In high-overload mode, the input demand rises to 34 A, and the inverter can supply 37.5 A to the motor terminals for short acceleration periods. Output frequency is adjustable up to 590 Hz, while a dedicated flux-mode ceiling of 300 Hz supports field-oriented control at very low shaft speeds. Electrical conversion reaches an efficiency factor of 0.98 at rated current, assisted by a 778 V DC active brake link that handles regenerated energy. Protective thresholds issue a high-voltage warning at 810 V DC and an overvoltage alarm at 820 V DC. The logic interface accepts digital command signals up to 28 V DC, and incoming phase imbalance must remain below 3.0% to avoid derating.
Thermal performance is based on a full-load power loss of 444 W, so enclosure airflow must remove the generated heat to maintain proper operating temperatures. The drive sustains a minimum true power factor of 0.9, helping limit current demand on upstream breakers and filters. Motor connection distances can reach 50 m with shielded cable, allowing the drive to be installed away from the connected load while maintaining protection against electrical interference. Where unshielded cable is permitted, the maximum motor connection distance increases to 75 m. Cable routing, grounding, and separation from control wiring should follow the applicable installation requirements to reduce conducted interference and preserve stable motor operation.
