The VW3A28821 is an exchange kit S1 for the Schneider ATV18 drive series, specifically listed as compatible with the ATV28HU09M2 and ATV28HU18M2 speed drive models. This is a service-part kit, not a standalone drive — it contains the components needed to refurbish an existing ATV18 unit in the field.
What to verify before ordering
Because this is an exchange kit for a specific drive frame (ATV28HU09M2 and ATV28HU18M2), the fit depends on the exact drive model and revision in your panel. The kit is designed for the ATV18 series enclosure — if your drive is a later Altivar variant or a different frame size, this kit will not physically match. The ATV28HU09M2 is a 0.75 kW / 1 HP unit and the ATV28HU18M2 is a 1.5 kW / 2 HP unit, both 230 V single-phase input drives; the exchange kit contains the power board and control interface specific to those ratings.