73 A LO on a 380-440 V line — what it means for your motor
The 6SL3220-1YD36-0UB0: This SINAMICS G120XA is a 3-phase VFD rated for a line voltage of 380 to 440 VAC (+10 % / -20 %), 47-63 Hz, delivering a low-overload rated current of 73.00 A. That LO figure is the continuous rating for pump, fan, and compressor duty — the drive can run at that current indefinitely without tripping on thermal overload, which is exactly what a water booster or HVAC air handler demands.