Product Description:

Danfoss builds the 137U6546 as part of the VLT EZ FC 321 Automation Drives series. It is a variable-frequency converter used to regulate induction motors in conveyor lines, pumps, and similar equipment. The unit belongs to the VLT AutomationDrive EZ product group and provides a standardized chassis-mount platform for speed and torque adjustment without mechanical gear changes. In automated systems, it changes motor output to match process demand more closely than fixed-speed operation can provide. Standard cable entries under Adaptation A also simplify field wiring in cabinet installations.

The drive delivers a continuous power rating of 110 kW, equivalent to 150 HP, so it can start and accelerate large fan or compressor loads directly from the line supply. That power level suits larger motor applications where stable acceleration is important. It is designed for three-phase 575-690 VAC networks and has an IP20 / chassis protection level, so it must be installed inside a cabinet to prevent contact with live parts. Dynamic stopping energy can be redirected through the integrated brake chopper, which helps prevent DC-bus overvoltage during rapid deceleration. Because no adaptation B is specified, the baseplate remains unmodified.

Electromagnetic compliance is handled by the built-in RFI Class A2 (C3) filter, while moisture resistance is supported by the factory-applied coated PCB. The filter helps limit conducted interference, and the coated board supports operation where humidity or airborne contamination is a concern. A graphical local control panel provides direct parameter access, event logs, and manual run capability without external tools. The listed configuration uses the standard language pack and does not include added software or extra option boards beyond the core drive functions. Version tracking is tied to the series number 321.