The VW3AE0728 is a cable-entry accessory for the top of an Altivar floor-standing enclosure, designed for the Altivar 61 Plus and Altivar 71 Plus drive ranges. It routes incoming power and control cables through the top plate rather than the bottom, which matters when the enclosure sits tight against a back wall or on a raised plinth where bottom access is blocked.
This accessory is specific to the Altivar floor-standing enclosure with separate air flows or the compact version. If you are retrofitting a top cable entry onto an existing Altivar 61 or 71 cabinet, this is the factory part that matches the gland-plate cutout and mounting hole pattern. No field modification of the enclosure top is needed — it bolts in place of the standard blanking plate.