Schneider Electric ATV71HD11N4 Variable Speed Drive

The Schneider Electric Telemecanique ATV71HD11N4 Variable Speed Drive is an 11 kW (15 HP) VFD in the Altivar 71 family designed to regulate speed and torque of three-phase asynchronous and synchronous motors. It accepts 380–480 V AC three-phase input and provides 380–480 V AC three-phase output, with a nominal output current of 21 A at 460 V / 27.7 A at 380 V and line currents of 30 A at 480 V / 36.6 A at 380 V; it operates on 50/60 Hz input and delivers 0.1–599 Hz output. Control options include sensorless flux vector, flux vector with encoder, V/F control, and Energy Adaptation (ENA), with a switching frequency between 1 and 16 kHz (4 kHz nominal). The drive includes integrated EMC filtering, Modbus and CANopen communications, IP20 protection, and panel-mounting with a heat sink. It is commonly used for precise motor speed regulation in pumps, fans, conveyors, compressors, mixers, and general industrial automation, with widespread applications in water and wastewater treatment, HVAC, material handling, mining, process manufacturing, and production lines. Common replacements include ATV630D11N4, ATV930D11N4, and Siemens SINAMICS G120X 11 kW.