SCHNEIDER ELECTRIC ALTIVAR 312 ATV312HD11N4 VARIABLE FREQUENCY AC SPEED DRIVE

SCHNEIDER ATV312HD11N4 is a 3-phase Altivar 312 series VFD, rated 11kW (15HP), 380–500V AC input, nominal output current 27.7A, integrated built-in EMC filter, designed for asynchronous motor variable speed control in marine, pump, fan and industrial machinery systems. The ac speed drive adopts sensorless flux vector control algorithm, delivering adjustable output frequency and torque for circulating pumps, ventilation fans and auxiliary marine motors. The ac speed drive has embedded Modbus and CANopen fieldbus communication ports, exchanging running data, speed setpoint and fault codes with PLC, marine automation and HMI consoles. The ac speed drive provides comprehensive protection functions including overcurrent, overvoltage, undervoltage, motor overload, phase loss, overheat and short-circuit protection; it stores fault history for maintenance diagnosis. The ac speed drive is fitted with local front panel keypad and display for parameter setup, manual speed adjustment and real-time operating data reading.

SCHNEIDER ATV312HD11N4 is IP20 protection rating for cabinet mounting, compact metal frame structure, side-by-side installation without power derating. The variable frequency drive unit supports adjustable acceleration/deceleration ramps, automatic motor tuning and slip compensation to maintain stable motor speed under variable load conditions. The variable frequency drive unit accepts analogue 4–20mA / 0–10V or digital contact control commands for remote operation. The variable frequency drive unit is a discontinued legacy model; its successor is Altivar 320 series. The variable frequency drive unit can withstand moderate humidity and temperature variation, and marine approved versions are available for shipboard auxiliary machinery control panels.

SCHNEIDER ATV312HD11N4 is widely deployed on cargo ships, tankers and offshore platforms for ballast pump, fire pump, ventilation fan and bilge pump variable speed control systems. The industrial spare part can replace faulty VFD units to restore motor speed regulation, fieldbus communication and multi-level electrical protection rapidly. The industrial spare part matches original mounting dimensions and power/logic terminal pin definition for direct cabinet replacement. The industrial spare part has clear part marking for fast identification and stock management. The industrial spare part reduces vessel downtime during motor drive cabinet overhaul and marine survey inspection.