The VW3AE0718 is a cable-entry accessory for the top of an Altivar floor-standing enclosure, specifically the version with separate air flows or the compact variant. It belongs to the Altivar 61 Plus and Altivar 71 Plus drive ranges.
Cable entry via the top means the gland plate or brush strip mounts on the enclosure roof, routing cables down into the drive compartment. This is the typical arrangement for top-entry installations where bottom cable access is blocked or where the drive sits on a raised plinth.