106 A LO rating anchors the load envelope
The 6SL3220-2YD40-0UB0 is a SINAMICS G120XA AC drive rated for 106 A in Low Overload (LO) duty. That LO figure is the continuous current the drive delivers without tripping on thermal overload — it sets the motor frame size and cable cross-section for the driven load, whether a pump, fan, or conveyor. The input section accepts 380... 440 V three-phase AC, 47... 63 Hz, with a tolerance band of +10 % / -20 %. That wide sag tolerance means the drive stays online through brownout conditions that would drop a tighter-range supply — relevant for sites with weak grid or long feeder runs.
Commissioning and panel fit notes
The 106 A LO rating at 380-440 V input means the upstream branch circuit protection and input reactor (if fitted) must be sized for that continuous current plus the drive's harmonic content. Coordination with a motor thermal model in the drive's parameter set avoids nuisance trips on cyclic loads.