FC-301P37KT2131B8981 Danfoss
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The Danfoss FC-301P37KT2131B8981 is part of the VLT FC 301 Automation Drives series and offers a power rating of 37 kW with an efficiency of 0.97. It operates on three phase power at 200 - 240 VAC and has a horsepower of 50 HP. The drive offers a maximum cable cross-section of 95 mm² and provides a 24 V output with a maximum load of 200 mA.
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Product Description:
The FC-301P37KT2131B8981 is an adjustable-speed drive produced by Danfoss as part of the VLT FC 301 Automation Drives series. The unit rectifies the incoming AC supply and converts it into a controlled DC bus. It then inverts the DC power to supply three-phase motors with adjustable frequency and voltage, allowing industrial process equipment to match motor speed to real-time load demands. This regulation supports applications such as conveyors, pumps, fans, and production machinery that require controlled acceleration and consistent speed.
The drive accepts a three-phase input of 200–240 VAC and delivers up to 37 kW of mechanical output, which corresponds to 50 HP. With a 230 V supply, the apparent input demand is 57 kVA, which assists with the selection of upstream transformers and protection devices. Electrical conversion efficiency reaches 0.97, helping limit heat generation inside control cabinets. A high-voltage warning occurs at 405 V DC, while an overvoltage alarm activates at 410 V DC. Both thresholds are above the 390 V DC brake-chopper activation level, allowing regenerative energy to be diverted before a fault shutdown occurs. The control terminals supply 10 V at 15 mA for analog potentiometers and 24 V at 200 mA for sensors, while the digital inputs tolerate levels up to 28 V DC. Logic outputs can sink 40 mA, and each STO channel draws 50 mA rms for safety-relay load calculations.
The modulation stage can generate carrier frequencies up to 32 kHz, and its pulse train for encoder interfaces reaches 110 kHz, supporting precise torque control on high-speed machinery. Motor leads may extend up to 50 m when shielded or 75 m when unshielded. These cable limits help prevent excessive capacitive loading at the inverter output. The power terminals accept copper conductors with a maximum cross-sectional area of 95 mm², providing capacity for the rated motor current. A mains phase monitor prevents the drive from starting when an input phase is missing. This protection reduces the risk of operating the rectifier stage with an unbalanced supply and helps protect the connected motor system.
