175Z7027 by Danfoss

The 175Z7027 is a variable-frequency drive built by Danfoss for the VLT 6000 HVAC Drives series. It is installed between the mains supply and a three-phase induction motor so that the delivered frequency and voltage match the real-time demand of ventilation, pump, or chiller equipment in industrial and commercial buildings. By trimming motor speed rather than using mechanical throttling, the unit helps reduce energy consumption, lowers acoustic output, and extends component life. Its footprint is suited for control cabinets where space is limited, allowing straightforward integration with existing switchgear and protective devices.

The application designation is HVAC, indicating preconfigured ramp profiles and PID regulation tuned for airflow and coolant circulation loops. The drive accepts a supply window of 380-460 VAC, enabling operation on common low-voltage three-phase networks worldwide. At the motor terminals, it can deliver up to 5.5 kW or 7.5 HP, which covers medium-sized air handlers or booster pumps. The electronics sit inside a compact IP 20 housing that provides touch protection when mounted inside a ventilated enclosure. To minimize conducted and radiated interference, the power stage includes an integral Class A1 and B filter, so additional external RFI components are usually unnecessary.

Operator interaction is handled through the detachable panel supplied with an LCP, giving parameter access, local start-stop control, and plain-text fault readouts without external tools. The construction is the baseline standard unit, and no extended I/O cards or sensor boards are fitted, which helps keep installed units consistent across multiple systems. Environmental protection relies on indoor cabinet mounting because the control board has no coating and should not be exposed to high humidity or airborne contaminants. Communication choices remain open because the fieldbus slot is supplied with no options installed, allowing only the required protocol hardware to be added later.