Product Description:

The 175H7433 is a variable frequency drive built by Danfoss for the VLT 3000 Variable Speed Drives series. It accepts three-phase mains and produces a synthesized output whose voltage and frequency are adjusted in real time, letting automation engineers trim motor speed, reduce energy demand, and match torque to process conditions. The device targets conveyors, pumps, and ventilation equipment scattered across factory and utility installations and consolidates control, protection, and diagnostics inside a single compact enclosure for simplified commissioning.

Under constant-torque duty the inverter delivers an apparent output of 17.3 kVA and can provide a continuous motor current of 24.0 A. Its full-load efficiency is 96%, which limits thermal stress on internal components. The rectifier section draws up to 21.8 A from the supply, data that guides breaker and cable sizing. Speed control ranges from zero to a maximum of 500 Hz, enabling oversynchronous operation where the connected machine permits. In this mode the drive supports a constant-torque motor rating of 15 HP, suitable for positive-displacement equipment that requires steady shaft power.

For quadratic-torque profiles typical of centrifugal pumps, the drive handles 23.0 kVA and a 20 HP motor without derating. Upstream protection is secured with a pre-fuse limit of 63 A. During short overloads it can source 38.4 A for sixty seconds, giving extra start-up torque. Power dissipation peaks at 425 W at maximum load, easing enclosure cooling design. Programmable acceleration and deceleration extend to 3600 s, allowing gentle speed transitions for mechanically sensitive loads. An integrated RFI filter suppresses conducted emissions to help installations meet EMC guidelines.