Product Description:

The 175H7283 is an AC variable frequency drive produced by Danfoss for the VLT 3000 Variable Speed Drives series. The device converts fixed-frequency, three-phase mains power into a pulse-width-modulated output that regulates induction motor speed in conveyors, pumps, and ventilation systems. By adjusting frequency and voltage, it allows the process to follow actual demand while reducing mechanical wear. A built-in brake chopper enables controlled deceleration of high-inertia loads, while the factory-installed RFI filter supports compliance with conducted-emission requirements in industrial automation environments.

In constant-torque mode, the rectifier draws 21.8 A, and the inverter can deliver up to 24.0 A to the motor terminals. These values affect conductor sizing and heat generation, with the drive dissipating 425 W that control-panel ventilation must remove. The drive supplies a rated mechanical output of 11.0 kW, which is adequate for typical 15 hp machines. It operates at an energy conversion efficiency of 0.96, so approximately four percent of the incoming power is lost as heat. Even with its open housing, the unit meets an IP20 touch-safe rating, allowing installation inside standard electrical enclosures without additional finger guards.

For variable-torque loads, the input stage tolerates up to 31.0 A, and the inverter can supply 32.0 A, providing the headroom needed to accelerate centrifugal fans or pumps. Field wiring may use conductors up to 16.0 mm², with motor leads permitted to reach 300 m when unshielded or 150 m when shielded to maintain electromagnetic compatibility. A 63 A gL/gG prefuse protects the power section against short circuits, and the drive can withstand vibration levels up to 0.7 g. The unit has a mass of 26.0 kg, which must be considered when it is mounted in elevated panels or swing-out cabinets.