The ATV312HU75N4 belongs to Schneider Electric’s Altivar 312 range of compact general‑purpose drives for three‑phase asynchronous motors. It is designed for a 3‑phase 323–550 V AC supply and provides a rated output voltage of 380–500 V with a motor power rating of 7.5 kW (10 hp) and 18 kVA apparent power. The drive’s nominal output current is 17 A, which suits a wide variety of 400 V‑class motors used in industrial machinery, pumps, fans and conveyors.
The Altivar 312 platform offers V/f and sensorless flux vector control, giving good torque at low speed and stable speed regulation without an encoder. It integrates Modbus RTU and CANopen as standard on the control terminals, enabling simple connection to PLCs and other controllers without additional communication cards. Typical overload capability on ATV312 drives is 150% of nominal current for 60 seconds, and 185% for 2 seconds, suitable for starting and accelerating most industrial loads.
Mechanically, the ATV312HU75N4 is a compact wall‑mount drive with an IP20 or IP21/IP41 protection level depending on mounting and accessories, and can be installed side‑by‑side with other drives to save panel space. A built‑in EMC filter (category depends on region and version) simplifies compliance with EMC standards, and a detachable local control panel with 4‑digit display and navigation keys allows local start/stop, speed setting and parameter adjustment.
Standard I/O on the Altivar 312 includes 5 or 6 programmable logic inputs, 1 logic or analog input, 1 analog input, 1 analog output, and 1 or 2 relay outputs (exact count per frame size), providing flexible wiring for run commands, speed references, status signals and alarms. Built‑in application functions cover multi‑speed operation, acceleration and deceleration ramps with S‑curve, PID control, automatic restart, flying restart, catch‑on‑the‑fly and fault management features, making the drive suitable for a wide range of OEM and retrofit applications.
According to Schneider’s product page, ATV312HU75N4 is now discontinued, with the suggested replacement being Altivar Machine ATV320U75N4B (7.5 kW, 380–500 V, 3‑phase, book format). However, many distributors still stock the ATV312HU75N4 or offer refurbished units as spares, and it remains widely used in installed machinery.
