ATV71HU55N4Z – 5.5 kW / 7.5 HP Variable Speed Drive (Altivar 71)

Product Overview

The ATV71HU55N4Z from Schneider Electric belongs to the Altivar 71 series. It is a high-performance variable speed drive for complex, high-power 3-phase motors. This drive delivers 5.5 kW (7.5 HP) and operates across 380…480 V AC. It features integrated EMC filter, CANopen and Modbus control interfaces, and a robust IP20 enclosure. Built for industrial environments, it supports asynchronous and synchronous motors with sensorless or closed-loop vector control. The ATV71HU55N4Z ensures reliable operation from -10 °C to 50 °C without derating up to 1000 m altitude.

Key Technical Specifications

• Manufacturer: Schneider Electric
• Series: Altivar 71
• Part Number: ATV71HU55N4Z
• Motor Power: 5.5 kW / 7.5 HP (3-phase, 380…480 V)
• Input Voltage: 380…480 V AC –15…+10 %
• Input Current: 17 A (480 V) / 20.3 A (380 V)
• Nominal Output Current: 11 A (460 V) / 14.3 A (380 V) at 4 kHz
• Max Transient Current: 21.5 A (60 s) / 23.6 A (2 s)
• Output Frequency: 0.1…599 Hz
• Switching Frequency: 1…16 kHz (4…16 kHz with derating)
• Control Modes: V/f (2/5 points), Sensorless FVC, Closed-loop FVC
• Communication: CANopen, Modbus (RJ45, RS485)
• Protection: IP20 (upper part), IP21/IP41 with kits
• Operating Temperature: -10…50 °C (no derating)
• Storage Temperature: -25…70 °C
• Altitude: ≤1000 m without derating; 1000…3000 m with 1% derating per 100 m
• Weight: 5.5 kg (12.1 lbs)
• Dimensions (H×W×D): 295 × 175 × 187 mm

Measurement & Control Performance

• Speed range: 1…100 (open-loop async) / 1…1000 (closed-loop with encoder)
• Speed accuracy: ±0.01 % (closed-loop) / ±10 % slip (open-loop)
• Torque accuracy: ±15 % (open-loop) / ±5 % (closed-loop)
• Transient overtorque: 170 % for 60 s / 220 % for 2 s
• Braking torque: ≤150 % with resistor / 30 % without
• Frequency resolution: 0.024/50 Hz (analog) / 0.1 Hz (display)
• Linearity error: ±0.15 % (AI) / ±0.2 % (AO)
• Accuracy precision: ±0.6 % over 60 °C variation

Environmental & Immunity

• Vibration resistance: 1 gn (13…200 Hz) / 1.5 mm (3…13 Hz)
• Shock resistance: 15 gn for 11 ms
• Relative humidity: 5…95 % without condensation
• EMC immunity: Level 3 surge, burst, ESD, RFI (IEC 61000-4)
• Standards: IEC 61800-3 (C3), EN 55011 Class A, UL Type 1
• Dielectric strength: 3535 V DC (earth/power) / 5092 V DC (control/power)
• Pollution degree: 2 (IEC 61800-5-1)

Installation & Mounting Guide

• Mounting style: With heat sink, vertical position ±10°
• Cable length: Up to 50 m shielded / 100 m unshielded
• Terminals: 2.5 mm² (AWG 14) for control / 6 mm² (AWG 8) for power
• Tightening torque: 0.6 N·m (control) / 3 N·m (power)
• Enclosure kits: IP21, IP31, IP41, IP54 (optional)
• Electrical connection: L1/R, L2/S, L3/T, U/T1, V/T2, W/T3, PA/+, PC/-, PO

Debugging, Maintenance & Diagnostics

• Diagnostic: 1 red LED for drive voltage
• Protection: Overvoltage, undervoltage, overcurrent, short-circuit, thermal, motor phase loss, input phase loss
• Regulation: Adjustable PI regulator, automatic slip compensation
• Ramps: Linear, S, U or customized (0.01…9000 s), auto adaptation
• Braking: DC injection, resistor braking
• Response time: ≤100 ms for STO (Safe Torque Off)

Compatibility & Communication

• Protocols: Modbus (RTU, 2-wire RS485), CANopen (up to 1 Mbps)
• Connectors: 2× RJ45 (Modbus), SUB-D 9 (CANopen)
• Option cards: Profibus DP, DeviceNet, EtherNet/IP, CC-Link, Modbus TCP, Interbus-S, Fipio, Encoder interface, I/O extension
• Motor types: Asynchronous and synchronous motors
• Control profiles: V/f, sensorless FVC, closed-loop FVC, vector control for synchronous

Certifications & Compliance

• Product certifications: UL, CSA, GOST, NOM 117, C-tick
• Marking: CE
• Standards: IEC 61800-5-1, IEC 60721-3-3 (Class 3C1, 3S2)
• EMC: IEC 61800-3 environment 1 & 2 category C3

Package Contents & Warranty

• 1 × ATV71HU55N4Z Variable Speed Drive
• 1 × Quick start guide (multilingual)
• 1 × CD-ROM with software and manuals
• Warranty: 12 months against manufacturing defects
• Shipping: via FedEx, UPS, or DHL (tracking provided)

Typical Applications

• High-power conveying systems, hoists, cranes
• Pumps, fans, compressors with variable torque
• Extruders, mixers, and textile machinery
• Metal processing, woodworking, and packaging lines
• Automated assembly and positioning systems

Diagnostic Capabilities

• Real-time monitoring of output current, voltage, frequency, torque
• Fault logging with history (overvoltage, undervoltage, overcurrent, overheating)
• Automatic restart after fault, configurable via Modbus/CANopen
• Built-in STO (Safe Torque Off) for functional safety (ISO 13849-1 level d)

Frequently Asked Questions (FAQ)

• Q: Does the drive support single-phase input?
  A: No. It requires 3-phase 380…480 V AC.
• Q: What is the maximum motor cable length?
  A: 50 m shielded, 100 m unshielded.
• Q: Is an EMC filter included?
  A: Yes, it has an integrated EMC filter.
• Q: Can I use this with a synchronous motor?
  A: Yes, it supports synchronous motors in open-loop vector control.
• Q: Does it have a built-in braking resistor?
  A: No, but it supports external braking resistors (≤150 % torque).
• Q: Which communication cards are optional?
  A: Profibus DP, DeviceNet, EtherNet/IP, Modbus TCP, CC-Link, Interbus-S, Fipio, and more.

Why Buy From Oiltech Controls?

• 15+ years in industrial automation spare parts
• Global shipment with FedEx, UPS, DHL
• Tested industrial surplus / refurbished options
• 12-month warranty on all products
• Technical verification before dispatch
• Support for obsolete control systems

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