175H1236 Danfoss
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The Danfoss 175H1236 is part of the VLT 3000 Variable Speed Drives series and supports a maximum output frequency of 500 Hz. It features a maximum input current of 30.7 A in continuous mode and 41.5 A in variable mode, with an output current of 44 A in variable mode. The drive handles max apparent power of 23.0 kVA in continuous mode and 31.6 kVA in variable mode, and supports a max wire size of 6 AWG.
Internal Product Review
The 175H1236 from the VLT 3000 Variable Speed Drives series by Danfoss delivers reliable performance with a maximum output frequency of 500 Hz and output current up to 44 A. This drive handles demanding applications with up to 31.6 kVA output apparent power and secure operation through a 63 A max pre-fuse. Overall, the 175H1236 stands out for high output capacity and excellent frequency control.
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Product Description:
The 175H1236 drive is an AC variable-frequency unit manufactured by Danfoss within the VLT 3000 Variable Speed Drives series. It converts fixed mains power to a controlled three-phase output so that induction or permanent-magnet motors can be regulated in industrial automation, ventilation, and pumping systems. By adjusting output frequency and voltage, the device allows process planners to match motor speed to load demand, reduce energy use, and improve mechanical lifespan.
The control terminal accepts a cycle-by-cycle input current up to 30.7 A in constant-torque mode and up to 41.5 A in variable-torque mode; upstream circuit breakers must accommodate those peaks. When driven at its maximum carrier setting the inverter produces up to 500 Hz, allowing high-speed spindles or servo-duty motors to run above base speed. In constant-torque service the output apparent power reaches 23.0 kVA, while variable-torque applications can draw a continuous 44 A without derating. The drive may be switched on or off up to five times per minute, and its wire lugs accept conductors as large as 6 AWG to minimize voltage drop at rated load.
Ramp handling and protective limits complete the performance profile. The programmable acceleration or deceleration interval can be extended to 3600 s, supporting slow starts for large inertia loads or gradual stops that prevent hydraulic transients. For short bursts the inverter withstands an overload of 51.2 A for 60 s, giving machines enough torque reserve to break static friction or handle momentary shocks. In variable-torque operation the apparent power ceiling rises to 31.6 kVA, so centrifugal pumps or fans can be driven at full volume when demanded. Coordination with upstream protection is simplified because the recommended pre-fuse is rated at 63 A.
