Product Description:

The 175L2039 is a variable frequency drive produced by Danfoss as part of the VLT 3000 Variable Speed Drives series. It modulates the AC supply delivered to an induction motor so that speed, torque and energy use match process demands in industrial automation lines. By converting fixed-frequency mains power into a regulated output, the unit enables controlled acceleration, deceleration and steady-state running without mechanical gear changes, making it suitable for conveyors, pumps and similar constant or variable torque loads.

The drive delivers a constant-torque output current of 27.9 A, and for variable-torque applications it can supply 24.2 A while maintaining thermal limits. Mains can be connected at 3×440/460/500 V (±10%), giving flexibility for different plant voltages. Output frequency is adjustable from zero up to 500 Hz, which broadens motor speed range well beyond the nominal 50 or 60 Hz region. At rated constant-torque loading the inverter presents an apparent power of 38.6 kVA to the motor terminals. Short, high-demand events can be handled because the electronics tolerate 44.6 A for 60 s without tripping. Electronic thermistor feedback inside the motor provides thermal protection, and the control logic accepts one start–stop command per minute as indicated by the 1/min limit.

Overall system efficiency is supported by an operating efficiency of 0.96, so only four percent of input energy becomes heat at rated load. The inverter synchronises with plant mains at 50/60 Hz, and its design expects a 3-Phase supply to minimise conductor current and harmonics. When matched to machinery demanding 15.0 kW of shaft power, the converter operates beneath its current and power ceilings, allowing continuous duty. These characteristics let plant engineers select smaller cabling, reduce panel ventilation needs, and achieve predictable thermal behaviour across constant and variable torque processes.