The VW3AE0129 is a 110 V motor for the circuit-breaker inside Altivar 61 Plus and Altivar 71 Plus floor-standing enclosures — the compact or separate-airflow versions. It's a protection accessory that drives the breaker open or closed as part of the drive's internal disconnect scheme.
The motor is specific to the floor-standing enclosure variant of the Altivar 61 Plus and 71 Plus drives — not the IP20 panel-mount or wall-mount versions. It mounts inside the cabinet's breaker compartment and operates on a 110 V control supply. If you're retrofitting a drive that has the separate-airflow or compact cabinet, this is the breaker motor that matches.