Schneider ATV71HU55N4Z Inverter

Overview: The ATV71HU55N4Z is a general-purpose inverter of Schneider‘s Altivar 71 series, with a rating of 5.5kW/7.5HP, compatible with 380-480V three-phase power supply. It features a built-in EMC filter and Modbus/CANopen communication, without a graphic terminal, and is suitable for constant torque loads. This model has been discontinued, and the ATV340 or ATV930 series are recommended as replacements.

1. Full Model Interpretation

2. Parametrii tehnici de bază

3. Product Features & Avantaje
4. High Dynamic Performance: Achieves 100% rated torque at zero speed (150% rated torque) output under closed-loop vector control, suitable for high-demand scenarios such as hoisting and lifting.
5. Comprehensive Safety Integration: Standard STO (Oprire sigură a cuplului) function, no additional modules required for safety circuit construction.
6. Flexible Communication Expansion: Plug-in communication cards compatible with mainstream industrial fieldbuses, enabling seamless interconnection with Siemens, Rockwell, Omron PLCs.
7. Robust and Durable Design: Standard coating for resistance to harsh industrial environments, with comprehensive protection mechanisms for over-temperature, over-voltage, over-load, etc.
8. Easy Operation & Întreţinere: Optional graphic terminal, “Easy Start” menu, parameter protection, and intuitive fault diagnosis.
9. Scenarii tipice de aplicare

The ATV71 series is designed exclusively for constant torque loads. Typical applications of ATV71HU55N4Z include:

Hoisting and lifting equipment (crane, elevator, winch)

Material conveying systems (belt conveyor, chain conveyor)

Packaging machinery, woodworking machinery, wood-based panel equipment

Process control equipment, mixere, compressors and other constant torque loads

Start-up and speed control of high-inertia loads

5. Discontinuation & Replacement Solutions

The ATV71 series has been discontinued, and Schneider officially recommends the following replacement paths:

5.1 Schneider Original Replacements

First Choice: ATV340U55N4 (5.5kW, 380-480V, built-in EMC, Modbus/CANopen)

Heavy-Duty/Complex Applications: ATV930U55N4 (higher performance and richer functions)

Key Replacement Notes: Match power, Voltaj, control mode, communication requirements, safety functions and installation method.

5.2 Cross-Brand Replacement Recommendations

6. Selecţie & Replacement Notes
7. Load Type Matching: Confirm the load is constant torque; for variable torque loads (fans/water pumps), economical series such as ATV610 are recommended.
8. Accessory Compatibility: Original ATV71 I/O expansion cards, encoder interface cards, etc., may need to be replaced with models adapted to the new series.
9. Parameter Migration: Use Schneider’s parameter conversion tool to ensure correct migration of key parameters (de ex., acceleration/deceleration time, torque limit, PID parameters).
10. Funcții de siguranță: The STO function of the new series needs to be reconfigured to meet the safety class requirements of the original system.
11. Installation Space: The dimensions of ATV340/ATV930 are slightly different from ATV71; confirm the installation space is compatible.

Schneider ATV71HU55N4Z Replacement Models

Overview: The ATV340U55N4 (general/economical) is the first choice for original factory replacement, and ATV930U55N4 (high-performance/full-function) is for heavy-duty/complex applications; cross-brand options include 5.5kW models of the same specification such as Siemens MM440, ABB ACS550, Mitsubishi FR-A840, and Rockwell PowerFlex 525.

1. Official Original Factory Replacement Solutions (Schneider Recommended)

The ATV71 series has been discontinued, and Schneider officially provides two core replacement paths:

1.1 Standard Replacement (First Choice): ATV340U55N4 (Altivar Machine Series)

Scenarii aplicabile: Constant torque loads such as general machinery, material conveying, and packaging equipment, pursuing a balance between cost performance and functions.

1.2 High-Performance Replacement: ATV930U55N4 (Altivar Process Series)

Scenarii aplicabile: High-demand applications such as hoisting, lifting and high-precision positioning, requiring advanced safety functions and communication capabilities.

1.3 Special Application Replacements

Fan/Water Pump Applications: ATV610U55N4 (Altivar Process Series, optimized for variable torque, higher energy efficiency)

Explosion-Proof Environment: ATV340U55N4 + explosion-proof enclosure (certification required)

Ultra-Compact Installation: ATV320U55N4 (miniaturized design, simplified function version)

2. Cross-Brand Replacement Model Recommendations (5.5kW/380-480V, Same Specification)

3. Key Replacement Notes

3.1 Load Type Matching

Confirm the original load is constant torque (the design target of ATV71); for variable torque loads (fans/water pumps), it is recommended to use the ATV610 series for higher efficiency.

For heavy-duty applications (de ex., hoisting), ATV930 or heavy-duty inverters of other brands must be selected to ensure 150% torque output capacity.

3.2 Key Parameter Migration Points

Key parameters: Acceleration/deceleration time, torque limit, PID parameters, motor nameplate data (must be re-entered).

Communication settings: Modbus address, baud rate and data format must be consistent with the original system.

Safety functions: STO parameters need to be reconfigured to meet the safety class requirements of the original system (ISO 13849 PL e).

3.3 Hardware Compatibility

Installation Dimensions: ATV340 is slightly smaller and ATV930 is slightly larger than ATV71; confirm the installation space is compatible.

Terminal Layout: The terminal positions of the new series have changed, requiring rewiring.

Accessory Adaptation: Original ATV71 I/O expansion cards and communication cards cannot be directly used for ATV340/930 and need to be replaced with corresponding models.

3.4 Utilization of Function Upgrades

ATV340/930 are equipped with a standard encoder interface (optional for ATV71), enabling higher precision control.

The new series supports industrial Ethernet such as EtherNet/IP, facilitating system upgrade to Industry 4.0.

Enhanced diagnostic functions can early warn of faults and reduce downtime.

4. Recommended Replacement Implementation Steps

4.1 Preparations

Record all parameters of the original ATV71 (backup with Schneider SoMove software is recommended).

Confirm motor nameplate data (power, Voltaj, actual, viteză, numărul de pol).

Evaluate load characteristics (constant torque/variable torque, starting torque requirements, braking needs).

4.2 Selection Confirmation

Select ATV340 or ATV930 series according to the application scenario.

Confirm accessory requirements (communication expansion card, brake resistor, filter, etc.).

4.3 Instalare & Commissioning

Install the new inverter with power off and ensure correct wiring (pay special attention to phase sequence).

Enter motor parameters and perform auto-tuning (mandatory step).

Migrate key control parameters and test basic operation.

Verify communication connection and safety functions.

Conduct load test and adjust parameters to the optimal state.