What this output reactor does on the line
The SIDAC 4EU3052-0AN30-4BA0 is a 3-phase output reactor (output choke) rated for 450 V AC line voltage, with a maximum continuous current of 85 A at 1000 Hz fundamental frequency and a rated switching frequency of 6 kHz. Its 0.12 mH inductance limits the rate of current rise from the drive's PWM output, reducing motor insulation stress and bearing currents on long cable runs.
Sizing the reactor to the drive and motor
At 85 A maximum current, this reactor is sized for a drive output in the 37–45 kW range on 400 V three-phase, depending on the load profile and ambient temperature. The 40 °C ambient rating and thermal class H (180 °C insulation system) give headroom for continuous duty in a warm cabinet. The 6 kHz switching frequency matches standard IGBT drive outputs; the 0.12 mH inductance value is a common choice for motor cable lengths up to about 100 m before additional dv/dt filtering is needed.