VLT6005HT4C54STR3DLF00 by Danfoss

The VLT6005HT4C54STR3DLF00 is an AC variable-frequency drive produced by Danfoss for the VLT 6000 HVAC Drives series. It regulates motor speed by varying output frequency and voltage, allowing fans, pumps, and compressors to match changing building demand. This helps maintain stable airflow or fluid flow in heating and cooling systems. By adjusting motor speed instead of relying on constant-speed operation, the drive can reduce abrupt cycling in HVAC equipment and support smoother process response.

The drive accepts a line supply of 380 - 460 VAC, so it can connect to common three-phase distribution systems in commercial facilities. Its power section is rated at 3.0 kW, which corresponds to 4.0 HP. A compact enclosure with an IP54 rating helps protect the electronics from dust and splashing water in mechanical-room installations. This allows the unit to be mounted nearer to the controlled equipment when a separate large cabinet is not required. For conducted emissions control, the inverter includes a Class A1 and B filter, which helps reduce noise on supply conductors. Parameter access and local start and stop commands are available through a local control panel (LCP). The panel also supports status viewing and local adjustments during normal operation.

Application focus is confirmed by the HVAC designation, so the drive suits ventilation and chilled-water loops that need stable, adjustable motor speed. System integration is handled through standard terminals because the unit has no fieldbus options. The control approach fits applications where analog or digital signals provide the speed reference and run command. It is supplied as a standard unit, which keeps the configuration straightforward for installations that rely on hard-wired control. This layout is suitable for stand-alone operation or simple integration with external control signals.