Schneider ATV71HD18N4 Variable Speed Drive

Product Introduction

The Schneider Electric ATV71HD18N4 Variable Speed Drive is a mid-power industrial drive from the Altivar 71 series, designed for complex, high-power machinery. It provides precise speed and torque control, reliable operation, and flexible motor management for a wide range of industrial automation applications.

This drive is suitable for three-phase motors up to 18.5 kW (25 hp) at 380–480 V, making it ideal for pumps, fans, conveyors, and other process machines. Its compact design with an integrated heat sink allows installation in tight control panels, while the built-in EMC filter and robust protections ensure stable and safe operation in harsh industrial environments.

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Product Specifications

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Applications

• Industrial machinery such as pumps, fans, conveyors, and mixers requiring precise speed and torque control

• Process automation systems, where flexible motor speed management is critical

• Compact control panel installations, benefiting from space-saving design

• Pumping, ventilation, and conveyor systems, operating under variable load conditions

• Retrofit or modernization projects, replacing older mid-power drives

• Distributed control environments, providing coordinated motor management across multiple units

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Advantages

• Mid-power capacity, supporting up to 18.5 kW / 25 hp

• Compact design with integrated heat sink, suitable for tight panel mounting

• Integrated EMC filter, ensuring minimal electrical interference and stable operation

• Stable and precise speed and torque control, improving process consistency

• High transient current tolerance, capable of handling temporary overloads

• Wide output frequency range (0.1–599 Hz), enabling versatile motor operation

FAQ

1. What motor power can the ATV71HD18N4 handle?
   It supports three-phase motors up to 18.5 kW / 25 hp, providing precise and stable speed control across the full power range.

2. Is this drive suitable for continuous operation?
   Yes, it is designed for reliable, continuous industrial use, maintaining consistent performance under extended workloads.

3. What is the maximum motor cable length supported?
   The drive can handle up to 50 m of shielded cable and 100 m of unshielded cable, allowing flexible installation without performance loss.

4. Does the drive include EMC filtering?
   Yes, an integrated EMC filter reduces electromagnetic interference, ensuring stable operation in industrial environments.

5. What is the nominal output current and transient capacity?
   Nominal output current is 34 A @ 460 V / 41 A @ 380 V, with transient capability of 61.5 A for 60 seconds or 67.7 A for 2 seconds.

6. What output frequency range is available?
   The drive provides 0.1–599 Hz, allowing smooth motor operation from very low to high speeds.

7. Can the drive handle variable or high-inertia loads?
   Yes, it features torque control and dynamic load compensation, maintaining stability under varying loads or high-inertia applications.

8. Are acceleration and deceleration ramps configurable?
   Yes, ramps can be adjusted to enable smooth starts and stops, minimizing mechanical stress and ensuring stable operation.

9. Is this drive compatible with industrial automation systems?
   Yes, it integrates with PLC systems and Altivar 71 networks, supporting standard communication protocols for monitoring and control.

10. What protection features are included in the ATV71HD18N4?
    It includes overcurrent, overvoltage, undervoltage, and thermal protections, safeguarding both the motor and the drive from abnormal conditions.

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