The VW3AE0427 is a panel-mount ammeter accessory for Altivar 61 Plus, Altivar 61 Plus-LH, Altivar 71 Plus, and Altivar 71 Plus-LH drives — specifically the floor-standing enclosure variants with separate air flows or the compact version. It reads the 6-pulse DC bus current on the drive, giving the commissioning engineer a local current indication without needing to pull up the drive's HMI or a remote SCADA point.
This is a control accessory that mounts inside the Altivar floor-standing enclosure — not a DIN-rail panel component. It's wired into the DC bus measurement circuit of the 6-pulse rectifier section. If you're sourcing this for a line-down replacement, verify the enclosure variant: the accessory is listed for floor-standing enclosures with separate air flows or the compact version, not the standard IP23 or IP54 wall-mount enclosures.