Schneider Electric ATV71HU55N4 Variable Frequency Drive

Schneider Electric ATV71HU55N4 is a 5.5 kW (7.5 HP) Altivar 71 variable frequency drive engineered for 3‑phase 480 V motors, delivering precise speed and torque control in compact form. It ships with an EMC filter and a graphical operator terminal for straightforward setup, and it includes an internal DC inductance to smooth DC bus transients, with an IP20 enclosure suitable for indoor mounting. As part of the Altivar 71 family, it offers sensorless vector control with the option of full torque at zero speed, enabling smooth starts for demanding loads such as pumps, fans, conveyors, and other machine systems without the need for an encoder. When applied to 480 V three‑phase motors, the ATV71HU55N4 provides reliable, scalable speed regulation across a broad operating range while maintaining a compact footprint. Note that Schneider Electric discontinued production of ATV71HU55N4 on October 18, 2023; migration recommendations include the ATV340U55N4E (5.5 kW, IP20, Ethernet-enabled) or the ATV930U55N4 (5.5 kW, IP21, with braking unit), chosen based on enclosure needs and integration requirements.