Schneider Electric ATV31HU11N4 Variable Frequency Drive

Telemecanique ATV31HU11N4 is a 1.1 kW (1.5 HP) variable frequency drive in the Altivar 31 family, designed to regulate the speed and torque of three-phase asynchronous motors in industrial automation systems. It accepts 380–500 V AC three-phase input and provides 380–500 V AC three-phase output with up to 3.0 A of output current, supports 50/60 Hz supply and 0.5–500 Hz output frequency, and uses sensorless flux vector control with PWM for smooth starting and accurate speed control. Key features include an integrated EMC filter, IP20 protection, and panel-mount with heat sink, making it suitable for conveyors, centrifugal pumps, ventilation equipment, mixers, packaging machines, and other production-line equipment where precise motor control and energy efficiency are important. Common replacements listed for this drive are Schneider Electric ATV312HU11N4 and ATV320U11N4C, reflecting its place in the broader Altivar line and compatible drive ecosystem.