VLT6006GT4C54STR1DLF00A00 by Danfoss

Danfoss positions the VLT6006GT4C54STR1DLF00A00 in the VLT 6000 HVAC Drives series as a compact AC variable-frequency drive intended to modulate fan and pump motors for building-services automation. By varying motor speed instead of relying on mechanical throttling, the unit allows airflow or hydronic flow to follow changing demand. This approach can reduce electrical consumption and equipment wear in air-handling and pumping systems.

The drive connects to three-phase mains rated at 380-460 VAC, which lets it run standard induction motors found in commercial ventilation systems without an external transformer. A continuous output capability of 4.0 kW / 5.0 HP is the maximum mechanical power the inverter can deliver, making it suitable for mid-sized supply fans or booster pumps. For electrical protection in mixed-use environments, the enclosure is a Compact IP 54 housing, which blocks dust ingress and splashing water when wall-mounted near the air handler. Parameter entry and local start-stop commands are handled through the integrated keypad and display identified as With LCP. The panel also shows operating frequency and fault codes for quick diagnostics. Conducted emissions toward the grid are limited by the built-in Class A1 filter, so additional line filters are unnecessary in most commercial switchboards. Internally, the model is built as a Standard unit, meaning no special thermal or conformal-coating options are fitted.

The Graham application coding provides predefined parameter groups for common building ventilation sequences, which can simplify setup when the drive is used with airflow sensors and VAV boxes. Because it is classified under HVAC Drives, the drive includes proportional-integral regulators tailored for temperature or pressure loops instead of basic speed control alone. The device has no fieldbus options, so it is intended to exchange analog setpoints or hardwired digital signals with the building management system rather than bus-based commands.