Product Overview

The ATV71HD55N4 is a premium-tier frequency inverter from the Schneider Electric Altivar 71 range, specifically engineered for high-performance motor control in complex industrial machinery. Rated for 55kW (75HP), this drive excels in managing constant torque applications that require significant starting effort and precise speed regulation. It is compatible with both 3-phase asynchronous and synchronous motors, providing a versatile interface for high-inertia loads. Built to ensure operational continuity, the Altivar 71 series integrates advanced diagnostic capabilities and flux vector control, making it a cornerstone for heavy-duty automation systems that demand both power and intelligence.

Technical Performance Matrix and Hardware Profile

The ATV71HD55N4 is designed for high-density cabinet integration, prioritizing thermal stability and electrical noise suppression. (Note: While standard control modules are compact, the 55kW power assembly utilizes a specific industrial frame for heat dissipation).

• Power Capacity: 55 kW (Normal Duty) / 45 kW (Heavy Duty)

• Horsepower Rating: 75 HP (Normal) / 60 HP (Heavy)

• Input Voltage: 380V to 480V AC (Three-Phase)

• Frequency Range: 50/60 Hz

• Overload Endurance: 150% for 60 seconds / 220% for 2 seconds

• Integrated Filtering: Built-in Class A EMC filter as standard

• Control Algorithm: Vector control (with or without sensor) and ENA (Energy Adaptation) system

• External Dimensions: 16.8 x 13.6 x 6.0 cm (Control module footprint)

• Unit Net Weight: 0.7 kg (Control interface weight; total power assembly approx. 44 kg)

• Thermal Management: Integrated cooling fan with vertical mounting support (+/- 10°)

• Safety Integration: Power removal safety function for protection against unintended motor restarts

High-Torque Industrial Deployment Scenarios

The Altivar 71 series is the industry benchmark for heavy-duty torque applications where precision under load is non-negotiable.

• Hoisting and Crane Systems: Delivering the extreme starting torque and smooth braking control required for vertical lifting and material handling.

• Complex Process Machinery: Driving industrial extruders, mixers, and crushers where maintaining constant speed despite variable torque demand is critical.

• Large-Scale Centrifuges: Managing high-inertia loads with controlled acceleration and deceleration ramps to prevent mechanical stress.

• Mining and Metal Processing: Controlling heavy conveyors and grinding mills in harsh environments where dust and vibration resilience are essential.

• Wood and Paper Industry: Regulating high-speed saws and tensioning rollers that require high-response speed regulation to maintain product quality.