Product Description:

The 175H4425 is a variable frequency drive produced by Danfoss for the VLT 3000 Variable Speed Drives series. It converts fixed-frequency three-phase mains power into a modulated output that allows pumps, fans, and conveyors to match real-time process requirements. By adjusting motor speed electronically instead of through mechanical gear changes, the unit improves energy use and reduces wear in automated plant equipment.

For electrical integration, the drive accepts three-phase supplies in the 380/400/415 V range and can power motors designed for 50, 60, 87, or 100 Hz service. Under constant-torque duty, its input demand is 41.9 A, so upstream feeders must be sized to carry that current. Danfoss recommends an upstream fuse rated at 80.0 A to provide coordinated fault interruption. When heavy acceleration or overload is needed, the inverter can supply 70.4 A for sixty seconds, whereas variable-torque loads are supported up to 61.0 A. Copper conductors up to 35.0 mm² fit the power terminals, and internal switching devices dissipate 880 W of heat. The drive has an efficiency of 0.96 at rated load, reducing the proportion of input power lost as heat during operation.

The chassis carries an IP20 ingress rating, which provides basic protection against contact with internal components. Because this enclosure is not sealed against dust or moisture, the drive must be installed in a filtered cabinet when either contaminant is present. During continuous constant-torque operation, the inverter delivers 44.0 A to the motor and produces 22.0 kW of mechanical output at the shaft. Under variable-torque duty, the available mechanical power increases to 30.0 kW for applications such as pumps and fans, where torque demand typically changes with speed. The assembly weighs 49.0 kg and requires a mounting structure capable of supporting its mass while maintaining the clearances needed for cooling airflow.