FC-301P55KT4131B6110 Danfoss
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The Danfoss FC-301P55KT4131B6110 belongs to the VLT FC 301 Automation Drives series and operates with a supply voltage range of 380 to 480 VAC on three-phase power. This drive has a rated output current of 147 A at 380-440 V, an input current of 96 A, and an efficiency of 0.98 at rated current. It supports a frequency range up to 590 Hz and has a control principle of VVC+.
Internal Product Review
The FC-301P55KT4131B6110 is a Danfoss VLT FC 301 automation drive designed for three-phase power on 380–480 VAC systems. VVC+ control and a 0–590 Hz output range give the drive very smooth speed regulation and strong application flexibility. A 147 A rated output current and 0.98 efficiency make the package especially appealing for demanding industrial duty.
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Product Description:
The FC-301P55KT4131B6110 variable frequency drive is produced by Danfoss as part of the VLT FC 301 Automation Drives series in the VLT AutomationDrive FC product group. It converts fixed three-phase 380–480 VAC mains power into variable-voltage and variable-frequency output power, allowing controllers to match motor speed and torque to process demands on conveyors, pumps, and fan arrays. Designed for cabinet installation, the unit integrates power electronics, control logic, and interface terminals into a single component for motion control in industrial automation. This arrangement reduces the need for separate control and power-conversion components within the electrical cabinet.
At a 400 V operating point, the inverter handles an apparent power of 73.4 kVA while drawing 96 A from a 380–440 V supply. It can deliver up to 147 A to the motor while maintaining a programmable output frequency range of 0–590 Hz for constant-torque or variable-torque loads. Power conversion follows the VVC+ control principle, and the dedicated flux mode maintains linear operation between 0 and 300 Hz. With a mains frequency of 50/60 Hz ±5%, the drive tolerates a phase imbalance of 3.0%. Output voltage is adjustable from 0 to 100% of the line voltage to support soft starts and controlled acceleration. At maximum load, the electronics dissipate 1022 W, so the enclosure cooling system must remove the generated heat.
Overall efficiency reaches 0.98 at rated current, and the displacement power factor remains above 0.98 while the true power factor stays at 0.9 or higher under full load. The DC link issues a high-voltage warning at 810 V DC and disconnects the drive when an overvoltage alarm occurs at 820 V DC. An active brake circuit engages at 778 V DC to divert excess regenerative energy to an external resistor. This braking action helps control rising DC-link voltage when the connected motor decelerates or an overhauling load returns energy to the drive. The three-phase architecture also supports stable power conversion during permitted supply fluctuations.
