Schneider Electric ATV71HU55N4 Altivar 71 5.5kW Drive

Oiltech Controls Insight

The Schneider Electric ATV71HU55N4 delivers robust motor control for demanding industrial applications. This Altivar 71 drive handles 5.5 kW (7.5 hp) with advanced sensorless and flux vector algorithms. It supports both asynchronous and synchronous motors. The unit integrates an EMC filter and offers flexible communication via Modbus and CANopen.

Key Technical Specifications

• Brand: Schneider Electric
• Model: ATV71HU55N4
• Series: Altivar 71
• Power Rating: 5.5 kW (7.5 hp)
• Supply Voltage: 380…480 V three-phase (-15% to +10%)
• Output Frequency: 0.1…599 Hz
• Switching Frequency: 1…16 kHz (4 kHz nominal)
• Control Modes: Sensorless flux vector, flux vector with encoder
• Motor Types: Asynchronous, synchronous
• Max Cable Length: 50 m (shielded), 100 m (unshielded)
• Enclosure Rating: IP20
• Communication: Modbus, CANopen
• Weight: 5.5 kg (12.1 lb)

Performance & Control Features

• Speed Range: 1…100 (open-loop async), 1…1000 (closed-loop with encoder)
• Speed Accuracy: ±0.01% (closed-loop), ±10% of slip (open-loop)
• Torque Accuracy: ±5% (closed-loop), ±15% (open-loop)
• Transient Overtorque: 170% for 60s, 220% for 2s
• Braking Torque: Up to 150% with braking resistor
• Regulation Loop: Adjustable PI regulator
• Motor Slip Compensation: Automatic, adjustable

Installation & Electrical Data

• Input Line Current: 17 A (480V), 20.3 A (380V)
• Nominal Output Current: 11 A (460V), 14.3 A (380V)
• Max Transient Current: 21.5 A (60s), 23.6 A (2s)
• Apparent Power: 13.4 kVA at 380V
• Prospective Line Isc: 22 kA
• Tightening Torque: 0.6 N·m (control), 3 N·m (power)
• Mounting: Vertical ±10°, with heat sink

Compatibility & Connectivity

• Supported Motors: Asynchronous and synchronous
• Communication Protocols: Modbus (RS485), CANopen
• Option Cards: Profibus DP, DeviceNet, Ethernet/IP, Modbus TCP, CC-Link, and more
• Analog Inputs: 2 (bipolar voltage, configurable current/voltage)
• Analog Output: 1 (configurable current/voltage)
• Discrete Inputs: 7 (including PTC probe and safety input)
• Relay Outputs: 2 (configurable)

Protection & Diagnostics

• Protection Functions: Overvoltage, undervoltage, overcurrent, short-circuit, thermal, phase loss
• Diagnostic LED: 1 red LED for drive voltage status
• Insulation: Electrical separation between power and control
• STO (Safe Torque Off): Response time ≤100 ms
• Compliance: EN/IEC 61800-5-1, UL Type 1, EN 61800-3, CE, CSA, GOST

Environmental & Operating Conditions

• Operating Temp: -10…50°C (without derating)
• Storage Temp: -25…70°C
• Altitude: ≤1000 m without derating, up to 3000 m with derating
• Vibration: 1.5 mm peak (3…13 Hz), 1 gn (13…200 Hz)
• Shock: 15 gn for 11 ms
• Humidity: 5…95% without condensation
• Pollution Degree: 2

Typical Applications & Suited Equipment

• Suited For: Complex, high-power machines like conveyors, pumps, fans, extruders, and hoists.
• Industry: Material handling, packaging, metal processing, and water treatment.
• Motor Compatibility: Works seamlessly with standard IE2/IE3 asynchronous motors and permanent-magnet synchronous motors.

Professional FAQ

• Q: How do I select the right braking resistor for this drive?
• A: Choose a resistor that matches the drive’s braking torque requirement (up to 150%). Consider the duty cycle and thermal dissipation. For hoisting applications, use a higher-rated resistor.
• Q: Can I use this drive with a motor longer than 50 m?
• A: For shielded cable, the max is 50 m. For unshielded, up to 100 m. Beyond that, add an output filter or derate the switching frequency.
• Q: What is the difference between sensorless and flux vector control?
• A: Sensorless vector control provides good torque without an encoder. Flux vector with encoder gives higher accuracy (±0.01% speed) and is better for precise positioning.
• Q: Does the drive support 1-phase input?
• A: No, this model requires a three-phase 380…480V supply. For single-phase, consider the ATV12 or ATV32 series.
• Q: How do I set up communication with a PLC?
• A: Use the built-in Modbus (RJ45) for simple networks. For industrial fieldbuses, install an optional communication card (Profibus DP, DeviceNet, Ethernet/IP, etc.).

Why Buy From Oiltech Controls?

• Over 15 years supplying industrial automation spares.
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• Rigorous testing of surplus and refurbished units before shipment.
• 12-month warranty on all products.
• Technical verification ensures compatibility and performance.
• Expert support for obsolete and legacy control systems.

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