Product Description:

The FC-301P4K0T4131B0991 is an AC variable-frequency drive manufactured by Danfoss for the VLT FC 301 Automation Drives series. It connects to a three-phase power supply and modulates motor speed for conveyors, pumps, and other industrial loads. This control enables soft starts, controlled acceleration, and energy-efficient operation without mechanical throttling.

The drive accepts a three-phase input range of 380–480 VAC with a maximum phase imbalance of 3.0%, keeping rectifier stress within acceptable limits. Continuous shaft output is rated at 4.0 kW, and the displacement power factor remains greater than 0.98 while the true power factor remains at or above 0.9, reducing reactive demand on switchgear. One analog output with 12-bit resolution can supply 0–10 V at up to 15 mA for external indicators or regulators. Two programmable digital outputs handle up to 40 mA each, and one relay output provides Form C contact feedback to connected control circuits. The scan-based control structure supports consistent processing of input commands and output states. Flux-vector regulation operates at frequencies up to 300 Hz, allowing stable torque control in the constant-power region.

The controller refreshes its control logic every 1 ms, supporting precise response in high-cycle processes. A 24 V auxiliary bus can deliver up to 200 mA to field sensors, which can reduce the need for separate sensor power supplies. Extended voltage-to-frequency operation reaches 590 Hz, allowing the inverter to control high-speed spindles as well as standard industrial pumps. Mechanical output is also rated at 5.0 HP for installations that use customary units. Operating controls restrict the unit to two power-ups per minute to reduce stress from repeated energization. Series identifier 301 associates this model with the applicable parameter structure, compatible option cards, and service components used within the AutomationDrive product line.