Product Description:

The 175H4131 is an AC 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 lets industrial controllers adjust induction motor speed and torque in pumps, fans, or conveyor sections. By regulating motor voltage and frequency, the unit supports process control while fitting into panel systems that use Danfoss drive components and fieldbus options.

The drive delivers a nominal shaft output of 1.1 kW, and in constant torque mode, it supplies a phase current of 2.8 A with an apparent power of 2.0 kVA. Overall efficiency reaches 0.96, so only 4% of the input power is dissipated as heat. Control electronics are powered by a dedicated 24 VDC rail that draws 140 mA, while the operator keypad can source reference signals from a 10 VDC potentiometer tap. Analog command channels present an input resistance of 10 kΩ in voltage mode and 188 Ω in current mode, allowing a direct interface with PLC analog outputs without excessive loading. The open-style heat sink housing carries an enclosure rating of IP00, so the unit must be installed inside a protected cabinet where convection airflow can remove the specified 60 W of internal power loss.

For short-term overloads, the inverter can supply a peak motor current of 3.5 A, raising the apparent output to 2.5 kVA for 60 seconds during acceleration or transient load spikes. Upstream protection is provided by a 16 A time-delay fuse, and field wiring can be terminated in spring or screw clamps that accept conductors up to 2.5 mm². Continuous thermal stability is supported by the aluminum baseplate and a total mass of 7.4 kg, which provides enough thermal inertia to keep semiconductor junction temperatures within acceptable limits during normal duty cycles.