The Schneider Electric VW3A4522 is a DC choke sized for a 287 A rated current with 0.19 mH inductance, designed to reduce current harmonics on the DC bus of a variable speed drive. The 0.19 mH value determines the impedance at the switching frequency — higher inductance flattens the DC ripple more but increases voltage drop and physical size. For a 287 A drive, this choke sits in the DC link between the rectifier and the inverter section, smoothing the pulsed current from the three-phase input into a steadier DC supply to the IGBTs. The 1.65 x nominal current overload rating for 60 seconds means the choke can ride through a short-term motor acceleration or load transient without saturating the core — useful for high-inertia loads like centrifuges or crushers where the inrush exceeds steady-state for a defined window.
Sourcing reality for an obsolete line item
Schneider has marked the VW3A4522 as Obsolete.