Configured for frequency regulation in three-phase motor applications, the Schneider Electric ATV312HU40N4 (ATV312HU40N4 Variable Speed Drive) provides direct physical and electrical execution of variable speed control for asynchronous motors within industrial automation platforms.

Model Suffix & Configuration

• ATV312: Altivar 312 series product family identifier.

• HU40: 4 kW power rating designation for high-density motor control.

• N4: Three-phase 380 V to 500 V input voltage range compatibility.

Hardware Specifications

Industrial Control & Network Communication

The drive architecture supports deterministic network integration through Modbus and CANopen protocols. Firmware flash compatibility allows for version synchronization with PLC control logic. I/O density scaling is achieved via programmable analog and digital terminals, ensuring that remote feedback loops and speed references are maintained within system-wide control parameters. The internal logic provides high-speed acceleration and deceleration ramps to mitigate transient mechanical stress on rotating equipment during startup and shutdown cycles.

Ordering Information

• 1 x ATV312HU40N4 Variable Speed Drive

• 1 x Installation and commissioning instruction manual

• 1 x Terminal cover set

Field Installation Directives

• Mounting: Ensure vertical installation on a grounded metal panel to maintain thermal dissipation efficiency.

• Clearance: Maintain a minimum of 100 mm of unobstructed space above and below the chassis for optimal airflow.

• Grounding: Connect the drive frame to the cabinet ground bus using a short, low-impedance copper strap to minimize EMI coupling.

• Shielding: Use shielded motor cables with the shield grounded at both the drive and motor ends to comply with EMC requirements.

Frequently Asked Questions

• Does this unit support external braking resistors? Yes, the drive includes dedicated terminals for connection to external braking modules to manage regenerative energy.

• Can the drive communicate via Profibus? No, this specific model is limited to Modbus and CANopen unless an optional communication gateway is utilized.

• What is the default switching frequency? The drive operates with a default switching frequency between 2 kHz and 16 kHz to balance noise and heat.

• Does the drive require a line reactor? External line reactors are recommended for high-distortion power networks to reduce harmonic content.

• How does the unit handle phase loss? The integrated protective logic triggers a fault state if input phase loss is detected during operation.

• Is the control I/O galvanically isolated? Yes, control signals are isolated from the power circuit to prevent ground loop noise.

• How do I reset the unit after a fault? Faults can be cleared via the HMI interface, the Modbus control command, or by cycling the power supply.

• Can this drive be used with permanent magnet motors? No, this drive is specifically engineered for three-phase asynchronous induction motors.