Product Description:

The FC-301P75KT4131B8631 is an AC variable-frequency drive manufactured by Danfoss for the VLT FC 301 Automation Drives series. Designed for plant conveyors, pumps, and general motion tasks, the unit modulates three-phase motor voltage and frequency so a controller can match shaft speed to process demand. This electronic control eliminates the need for mechanical throttling or separate soft-starter hardware while providing adjustable motor operation.

This drive delivers 75 kW of continuous output, allowing it to run medium-sized induction motors at their rated torque. It accepts an input range of 380–480 VAC, which covers common industrial mains, and it is wired for three-phase power. The line frequency tolerance is 50/60 Hz ±5%, so the electronics remain synchronized when the supply frequency varies slightly. Reactive current is minimized by a displacement power factor above 0.98, while the true power factor remains at or above 0.9 under nominal load. Motor speed can be set up to 590 Hz, and a dedicated flux-mode ceiling of 300 Hz supports field-oriented control at lower carrier ratios. The torque rise time is 1 ms for responsive dynamic changes, and the inverter tolerates a phase imbalance of 3.0% without tripping.

The control section supports an intermittent overload of 150% for one minute during each 10-minute interval, providing additional acceleration torque during startup or process disruptions. Full power is available at altitudes up to 1000 m without derating, and the heat sink maintains its rated performance at ambient temperatures up to 45 °C. Efficiency meets the IE2 classification to limit operating losses. Shielded motor leads may extend up to 50 m, while unshielded cable may extend up to 75 m before reflected-wave concerns arise. Internal timers restrict power cycling to once per minute to protect the capacitors.