FC-301PK55T4134L2639 Danfoss
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The Danfoss FC-301PK55T4134L2639 is part of the VLT FC 301 Automation Drives series and supports three-phase power with a mains voltage of 380 to 480 VAC. It has a power rating of 0.55 kW, a maximum output current of 1.8 A at 400 V, and an efficiency of 0.95 at rated current. The drive features an analog input resolution of 10 bit and can use unshielded motor cables up to 75 meters.
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Product Description:
The FC-301PK55T4134L2639 is an AC variable frequency drive built by Danfoss and offered in the VLT FC 301 Automation Drives series. In an automation cell, it sits between the three-phase supply and a squirrel-cage motor, converting constant line frequency into a programmable waveform that regulates shaft speed and torque. The drive can replace mechanical dampers or gear changes, supporting coordinated motion, improved energy use, and reduced maintenance for conveyors, mixers, or fan arrays.
The inverter has a rated output of 0.55 kW, which corresponds to 0.75 HP of mechanical shaft power. It connects to industrial three-phase supplies rated at 380–480 VAC, draws 1.6 A, and delivers 1.8 A to the motor. Its apparent-power output is 1.3 kVA, providing capacity for vector-controlled operation. Frequency setpoints can be adjusted in increments of ±0.003 Hz, allowing precise proportional-integral tuning. The inverter withstands an overload of 160% for 1 minute every 10 minutes, allowing brief torque increases without triggering a fault. Control electronics limit energization to two power-ups per minute, helping protect the capacitors and soft-charge resistors from excessive electrical stress.
The speed regulator has a response time of 2 ms or less, while internal tasks are resampled every 1 ms to support stable current control. Conversion efficiency reaches 0.95, and the drive produces 42 W of heat at maximum electrical load, reducing panel ventilation demands. The analog interface provides 10-bit resolution and 0.5% full-scale accuracy for process variables. A brake chopper activates at 728 V DC to route regenerated energy to a connected braking resistor. Motor cables may extend up to 50 m when shielded or 75 m when unshielded, giving installers flexibility when routing conductors between the drive and motor. The control platform uses series identifier 301 for compatibility with the parameter structure of the FC 301 product line.
