FC-301P18KT4131X7315 Danfoss
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The Danfoss FC-301P18KT4131X7315 is part of the VLT FC 301 Automation Drives series. It has a power rating of 18.5 kW with a 25 HP output and operates on three phase power at a mains voltage of 380 to 480 VAC. The drive delivers a continuous output current of 37.5 A at 380-440 V, a maximum output frequency of 590 Hz, and an efficiency of 0.98 at rated current.
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Product Description:
The FC-301P18KT4131X7315 is an AC variable frequency drive produced by Danfoss for the VLT FC 301 Automation Drives series within the VLT AutomationDrive FC product group. Operating from a three-phase 380–480 VAC supply, the unit synthesizes variable voltage and frequency to regulate induction motor speed in conveyors, pumps, and packaging lines. It addresses midrange motion tasks while keeping enclosure space modest and wiring straightforward, giving machine builders an electrically efficient alternative to mechanical throttling.
The drive’s continuous output is rated at 400 V, where it can deliver 26 kVA while drawing 34 A from the mains and supplying 37.5 A to the motor terminals. Under these conditions, the conversion chain reaches an efficiency of 0.98, limiting thermal dissipation to 444 W that must be removed by panel ventilation. The power section provides 18.5 kW of mechanical output, and the control loops maintain a true power factor of at least 0.9, minimizing reactive demand on plant transformers. An output frequency resolution of ±0.003 Hz allows precise speed adjustments for processes that require tight velocity ranges.
During acceleration bursts, the inverter supplies 60 A for one minute before returning to its continuous ratings. Flux-mode operation extends field weakening up to 300 Hz, while the synthesized output frequency can reach 590 Hz for high-speed spindles. The microcontroller scans command registers every 1 ms and refreshes torque commands within 2 ms or less, keeping response delays minimal. Installation requirements permit one power-up per minute to protect the bus capacitors and rectifier from excessive charging cycles. The drive also tolerates phase imbalance of up to 3.0% without derating, supporting stable operation when the incoming supply is not perfectly balanced.
