FC-301PK37T4134L2638 Danfoss
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The Danfoss FC-301PK37T4134L2638 is part of the VLT FC 301 Automation Drives series and offers a power rating of 0.37 kW with 0.50 horsepower. It operates on three phase 380 to 480 VAC mains voltage and supports a maximum output frequency of 590 Hz. This drive features VVC+ control principle and 12-bit analog output resolution.
Internal Product Review
The FC-301PK37T4134L2638 is a Danfoss VLT FC 301 automation drive built for three-phase power at 380 to 480 VAC. VVC+ control and a 590 Hz maximum output frequency give the drive smooth motor response and strong application flexibility. A 12-bit analog output with 0.5% FS accuracy makes this unit a very capable choice for precise automation duty.
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Product Description:
The FC-301PK37T4134L2638 is a variable frequency drive built by Danfoss for the VLT FC 301 Automation Drives series. It converts fixed-frequency three-phase power into a modulated output that allows process controllers to adjust induction motor speed without mechanical throttling. Within automated material-handling cells, the drive stabilizes torque, reduces inrush current during starts, and provides parameter access through the series’ standard keypad or fieldbus options.
The drive’s motor output is rated at 0.50 HP, which is equivalent to 0.37 kW, making it suitable for light-duty pump or fan applications. It accepts a three-phase supply of 380–480 VAC and tolerates a line-supply imbalance of 3.0%. The VVC+ control algorithm maintains constant-flux regulation as the load changes. The maximum synthesized fundamental frequency at the terminals reaches 590 Hz, while a separate 300 Hz flux output ceiling supports field-weakening operation when required. The inverter can reduce its IGBT pulse width to 4.5 µs, supporting stable pulse-width modulation at low speeds. Shielded motor leads may run up to 50 m, while unshielded leads may run up to 75 m without exceeding the drive’s reflected-wave limits.
The analog output has an accuracy of 0.5% FS at 12-bit resolution, allowing a PLC to track motor variables precisely. Each digital input withstands up to 28 V DC through a 4 kΩ internal resistor, and logic transitions are detected when pulses exceed 4.5 ms. The inputs source a maximum of 40 mA, while the Safe Torque Off circuit draws 50 mA RMS at 24 V. The carrier frequency reaches 32 kHz, providing flexibility when balancing switching losses and acoustic noise. The motor cable ground shield should be bonded at both ends to contain switching harmonics and meet the electromagnetic compatibility guidance for the VLT AutomationDrive FC group.
