Schneider Electric ATV320U40N4B AC Variable Frequency Drive

The Schneider Electric ATV320U40N4B Altivar Machine is a 4.0 kW, three-phase AC variable-frequency drive designed to precisely control motor speed for ventilation, pumping, and other compact automation tasks in HVAC, industrial equipment, and retrofit projects. It accepts a 380–500 V AC three-phase supply and delivers a rated current around 9.5 A, housed in a compact book-form enclosure (IP20) suitable for panel installations and space-constrained environments, with advanced connection options that support quick wiring and integration. The drive supports both asynchronous and synchronous motors, including IE2, IE3 and PM motors, making it compatible with a wide range of motor types while maintaining efficient operation; it belongs to Schneider Electric’s ATV320 family, known for straightforward parameterization and built-in protection features. In ventilation and pumping applications, the ATV320U40N4B is marketed to deliver energy savings through optimized speed control, with up to about 30% potential reduction in energy use under certain load profiles, while providing reliable, easy commissioning and long-term motor control success.