FC-301P18KT2131B8970 Danfoss
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The Danfoss FC-301P18KT2131B8970 is part of the VLT FC 301 Automation Drives series and is rated for 25 horsepower and a power rating of 18.5 kilowatts. It supports a mains voltage range of 200 to 240 VAC with three phase power and features a maximum output frequency of 590 Hz. The drive offers an open-loop speed accuracy of ±8 RPM and a closed-loop speed accuracy of ±0.15 RPM, with a system response time of up to 2 milliseconds.
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Product Description:
The FC-301P18KT2131B8970 is a variable-frequency drive manufactured by Danfoss for the VLT FC 301 Automation Drives series. It converts a 200–240 VAC three-phase supply into regulated output power that allows controllers to vary motor speed and torque in automated conveyors, pumps, and material-handling cells. By modulating the inverter bridge, the unit manages induction or permanent-magnet motors without mechanical throttling, which can reduce wasted energy in applications with changing speed or load requirements.
On the power side, the integrated brake chopper activates at 390 V DC, allowing rapid deceleration while protecting the DC link. Closed-loop regulation keeps shaft speed error within ±0.15 rpm, and the digital inputs accept up to 28 V DC for direct connection to compatible PLC I/O cards. The inverter section is sized for 25 HP, and its vector algorithm can reach a maximum output frequency of 590 Hz. A dedicated flux-mode range of 300 Hz is available for field-oriented control. The drive issues an overvoltage alarm at 410 V DC to protect the bus capacitors. Pulse-width modulation reaches 110 kHz and supports an output frequency resolution of ±0.003 Hz. Open-loop speed drift is limited to ±8 rpm, while start and stop commands repeat within ±0.1 ms for predictable index timing. Internal regulators use a 1 ms scan interval to process control parameters and update the commanded output.
The drive provides a continuous power capability of 18.5 kW. Its total system response does not exceed 2 ms, helping the motor follow rapid command changes with minimal delay. The safe torque off inputs draw 50 mA rms at 24 V and allow the drive to disable torque through a dedicated safety circuit. Shielded motor leads can extend to 50 m, while unshielded leads can reach 75 m when the installation permits their use. These cable allowances provide routing flexibility between the drive enclosure and motor without requiring the two components to be installed next to each other.
