175H9100 Danfoss
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The Danfoss 175H9100 is a variable speed drive in the VLT 3000 Variable Speed Drives series and provides a typical shaft output of 11.0 kW. It supports rated motor voltages of 380, 400, and 415 V with a supply frequency of 50 or 60 Hz, and has a power factor up to 1.0. The drive allows a maximum screened motor cable length of 150 meters at a carrier frequency up to 4.5 kHz, and up to 300 meters total motor cable length.
Internal Product Review
The 175H9100 from the VLT 3000 Variable Speed Drives series by Danfoss delivers reliable performance with a typical shaft output of 11.0 kW and a power factor up to 1.0. Its versatility is enhanced by the ability to handle rated motor voltages of 380/400/415 V and supply frequencies of 50/60 Hz. The drive stands out for supporting long motor cable runs up to 300 meters, making it suitable for a range of industrial installations.
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Product Description:
The 175H9100 variable frequency drive is produced by Danfoss within the VLT 3000 Variable Speed Drives series. Designed for cabinet mounting in industrial automation lines, it receives three-phase mains power, rectifies it, and issues a controlled AC waveform so induction motors can operate at commanded speeds rather than at the fixed utility frequency. This modulation allows precise torque control for conveyors, pumps, and ventilation equipment while lowering energy consumption and extending mechanical life.
This drive accepts a line input of 3 × 380/400/415 V AC (±10%), matching common plant distribution levels. Internal rectification and inverter stages operate with an incoming line frequency of 50/60 Hz, and the control logic then generates selectable output frequencies while delivering a shaft power of 11.0 kW when paired with a properly rated motor. At unity load, the displacement power factor reaches 0.9/1.0, meaning reactive current is minimized and upstream conductors are used efficiently. The output section can be configured for constant-torque or constant-horsepower regions across 50/60/87/100 Hz, while the rated motor voltage remains 380, 400, or 415 V to preserve magnetic flux in standard IEC windings.
Pulse-width modulation is limited to a carrier frequency of 4.5 kHz, a value that balances acoustic noise with semiconductor switching losses. To prevent thermal cycling in electromechanical contactors, the integrated DC link allows input switching only once per minute, so frequent start-stop sequences require an external bypass. For long motor leads, the unit supports shielded cable runs up to 150 m at or below the carrier frequency limit and unshielded lengths up to 300 m, permitting remote motor placement without excessive voltage drop. These cable allowances work with the specified motor voltage to maintain rise time within insulation limits and support stable current feedback to the drive.
