Product Description:

The 175H4453 is an AC variable frequency drive in the VLT 3000 Variable Speed Drives series from Danfoss. Designed for cabinet or wall mounting, the drive converts fixed three-phase mains power into an adjustable output that matches induction motor speed to process demand. It serves conveyors, pumps, and fan systems where precise speed regulation and soft starting can reduce mechanical stress and energy consumption. The adjustable output also allows connected equipment to operate at the speed required by the application rather than continuously running at full speed.

Its continuous rating is 4.0 kW, delivered in constant-torque duty with an input current of 17.5 A. Under variable-torque duty, the input current rises to 23.1 A. The converter produces 7.6 kVA of apparent power in constant-torque operation, while the variable-torque channel can supply 10.0 kVA. The IP54 enclosure allows installation in dusty workshops and areas subject to water spray. At 96% efficiency, the unit dissipates 270 W in constant-torque use and 425 W in variable-torque use, so most of the supplied energy reaches the motor. Continuous-torque output current is 19 A and may reach 30 A for 60 seconds, providing short-term capacity for acceleration or sudden load increases.

Copper conductors with cross-sectional areas up to 16 mm² can be connected to the terminal block, and branch protection can use a 40.0 A prefuse to clear faults without nuisance trips. When the variable-torque channel operates at maximum load, it dissipates 425.0 W of heat, so adequate airflow is required around the drive. The drive weighs 34.0 kg, which should be considered when selecting mounting hardware and the supporting structure. Output current in variable-torque mode reaches 25 A. In constant-torque operation, apparent power can reach 12 kVA for one minute, extending the available torque during startup or brief overload conditions.