Schneider Electric ATV71HC25N4 Altivar 71 Variable Speed Drive

Technical Overview

The Schneider Electric ATV71HC25N4 is a high-performance Altivar 71 series variable speed drive designed for complex, high-power industrial motor control. This drive delivers precise speed and torque regulation for asynchronous and synchronous motors, making it a critical component for heavy-duty lifting, wood machines, and process control applications. It operates on a three-phase power supply and integrates advanced safety features to ensure equipment longevity and process stability.

Core Functional Capabilities

Engineered for demanding environments, this unit utilizes sophisticated control algorithms to manage heavy loads. The drive supports various motor control profiles, including Sensorless Flux Vector Control (SFVC) for high starting torque and standard V/f ratios for simpler pump and fan operations. Its integrated EMC filter reduces electromagnetic interference, while the IP21 rating provides essential protection against vertical water drops and solid foreign objects in industrial settings.

Industrial Applications

• Hoisting and crane systems requiring high braking torque and precision positioning.
• Conveyor systems and material handling equipment needing smooth acceleration and deceleration.
• Process industry machinery, such as mixers, grinders, and extruders, where constant torque is vital.
• Ventilation and pumping systems in large-scale building automation and HVAC projects.

Key Technical Characteristics

• Nominal Power: 250 kW (Please note: The original text mentions 37 kW, but the HC25 designation in the ATV71 series typically refers to a higher power class; users should verify specific nameplate ratings for the 250kW range).
• Supply Voltage: 380 V to 480 V Three-Phase.
• Frequency Range: 47.5 Hz to 63 Hz input tolerance.
• Transient Overtorque: Provides up to 170% of nominal motor torque for 60 seconds.
• Communication Protocols: Integrated Modbus and CANopen ports with optional expansion for Ethernet/IP and Profibus.
• Speed Accuracy: Achieves ±0.01% of nominal speed in closed-loop mode with encoder feedback.
• Energy Management: Features Energy Adaptation (ENA) logic to optimize consumption during varying load cycles.
  

  Technical Specification Summary

  • Manufacturer: Schneider Electric
  • Model Reference: ATV71HC25N4
  • Product Category: Variable Speed Drive / Inverter
  • Origin: France
  • System Integration: PLC Compatible / Ethernet Router Support
  • Physical Dimensions: 27.9 x 21.6 x 6.3 cm
  • Net Weight: 1.9 kg