175Z7368 by Danfoss

The 175Z7368 is a variable-frequency drive produced by Danfoss for the VLT 6000 HVAC Drives series. Installed between the mains supply and the fan or pump motor, it varies output frequency to regulate flow in building automation loops, letting plant controllers match ventilation or hydronic capacity to real-time demand. The product serves as an energy-saving actuator in industrial and commercial climate-control systems where electronic speed adjustment replaces mechanical throttling.

Electrically, the drive accepts three-phase input of 380-460 VAC, matching standard low-voltage switchgear found in mechanical rooms. Its continuous output is rated at 22 kW / 30 HP, allowing it to power medium-size air handlers or primary pumps without auxiliary gearboxes. The enclosure is a Compact NEMA 1 housing, suitable for indoor wall or panel mounting while providing basic personnel protection. Operators configure parameters through a detachable interface supplied with an LCP. This Local Control Panel shows speed, current, and alarm codes and can be door-mounted when the drive sits inside a cabinet. The factory profile marked Graham loads default HVAC sequences so initial setup requires only minor adjustment of setpoints.

For electromagnetic compliance planning, the unit ships without an integrated filter, so any required RFI suppression must be implemented with external line chokes or filters. Circuit boards have no protective coating, which calls for installation in clean, dry air. The power stage uses the standard unit layout found across other frames in the series, maintaining a consistent internal arrangement. Communication slots remain empty because there are no fieldbus options fitted, so speed reference is delivered through analog inputs or entered on the keypad. This arrangement allows the drive to operate through local commands or standard hardwired control signals.