FC-301P75KT4134L2928 Danfoss
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The Danfoss FC-301P75KT4134L2928 is part of the VLT FC 301 Automation Drives series and supports three phase power at a mains voltage range of 380 to 480 VAC. It delivers a rated power of 75 kW at 400 V and features a high overload apparent power of 102 kVA. The drive has a maximum input current of 133 A and output current of 147 A under high overload for voltages between 380 to 440 V.
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Product Description:
The FC-301P75KT4134L2928 is an AC variable-frequency drive manufactured by Danfoss within the VLT FC 301 Automation Drives series. The unit converts fixed utility power into a modulated output that lets controllers regulate induction motor speed, torque, and process throughput in industrial automation cells. By adjusting output frequency and voltage, the drive supports energy-efficient operation of pumps, fans, and material-handling conveyors while providing the electrical protection features built into the series.
This frame size is rated at 75 kW when supplied from a 400 V line, giving the inverter a continuous power ceiling for medium-to-large motors. The input section accepts three-phase power from 380–480 VAC, and the internal control loops maintain the required output with a line imbalance of up to 3.0%. Under high-overload duty, the converter can deliver 147 A of motor current, while the corresponding input current reaches 133 A and the peak capability reaches 221 A during transient acceleration. Apparent power under the same operating profile is 102 kVA. Total conversion losses are limited by an efficiency of 0.99. Power quality is supported by a displacement power factor greater than 0.98, reducing reactive loading on the supply network and allowing appropriately sized upstream contactors and cabling.
During emergency deceleration, the internal brake chopper activates at 778 V DC, redirecting surplus energy to an external resistor before the high-voltage warning threshold of 810 V DC is reached. An overvoltage alarm trips at 820 V DC to protect the device from excessive electrical stress. Continuous heat dissipation is limited to 1232 W, so cabinet ventilation must accommodate this thermal load under worst-case operating conditions. The inverter withstands symmetrical fault currents up to 100,000 A RMS. Only one power-up per minute is permitted to protect the precharge network from repeated inrush current. A true power factor of at least 0.9 is maintained across the modulation range, helping provide consistent loading for upstream generators and uninterruptible power supply systems without excessive harmonic content.
