The VW3A4627 is a Schneider Electric passive filter rated 72 A at 400 V three-phase, designed to reduce current harmonics on Altivar ATV61 and ATV71 variable-speed drives. It's a line-reactor style filter — no active switching — so it drops in ahead of the drive and handles the full motor current. The 72 A rating covers the 30 kW and 37 kW drive frames listed in the compatibility table, and the 50 mm² terminal connection matches the power wiring those frames typically pull.
The THDI numbers tell you exactly what you'll get per drive model: 10 % for the ATV61HD30N4 (30 kW/40 hp) and ATV71HD30N4, and 5 % for the ATV61WD30N4 (30 kW/40 hp) compact variant. That's the residual harmonic distortion after the filter — not the filter's own rating, but the system result. If your site has a 5 % THDI spec from the utility or a power-quality audit, the ATV61W models hit it; the ATV71H and ATV61H models land at 10 %. The filter's efficiency is 98 %, so you lose about 2 % of the motor power as heat in the reactor — negligible for most lines, but worth factoring if you're running near the drive's thermal limit. Cos phi varies with load: unity (1.0) at 150 % of line current, 0.99 at full load, and 0.85 at 75 % load. That means the filter doesn't degrade the drive's power factor at normal operating points — it stays near unity where it matters most.
Deployment context
IP20 enclosure means it's for clean indoor panels only — no washdown, no dust. Mount it in the drive cabinet ahead of the VFD, one filter per drive as specified. The 50 mm² terminals handle the power wiring for 72 A continuous; torque them to the drive manufacturer's spec for the lug size.