Product Introduction
The Schneider ATV71HD55N4 Variable Speed Drive is part of the Altivar 71 series, developed for advanced motor control in complex industrial environments. It combines strong overload performance, flexible control algorithms, and integrated protection functions in a compact panel-mount platform.
Unlike standard drives intended only for basic speed variation, this model is designed for applications where process precision, load stability, and long-term reliability directly impact plant performance. Its advanced motor control helps improve production consistency, reduce equipment stress, and optimize energy use.
From a maintenance perspective, the ATV71HD55N4 also offers long-term operational value through clear status feedback, accessible commissioning tools, and dependable performance in continuous-duty applications.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Variable Speed Drive |
| Model | ATV71HD55N4 |
| Series | Altivar 71 |
| Motor Power | 55 kW / 75 hp |
| Input Voltage | 380–480 V AC |
| Phase | 3 Phase |
| Line Current | 120 A at 380 V / 101 A at 480 V |
| Nominal Output Current | 116 A at 380 V / 96 A at 460 V |
| Maximum Transient Current | 174 A for 60 s / 191 A for 2 s |
| Output Frequency | 0.1–500 Hz |
| Switching Frequency | 1–16 kHz Adjustable |
| EMC Filter | Integrated |
| Protection Rating | IP20 |
| Mounting Type | Wall / Panel Mount |
| Dimensions | 630 × 290 × 320 mm |
| Weight | 44 kg (97.00 lb) |
Engineered for High-Power Process Control
The Schneider ATV71HD55N4 Variable Speed Drive is built for industrial systems that require precise speed regulation, stable torque delivery, and dependable operation under demanding load conditions. It is commonly used in:
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Heavy-duty conveyor and transfer systems
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High-capacity pumps and booster stations
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Industrial compressors and ventilation units
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Extruders and process machinery
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Hoisting and lifting systems
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Mixers, agitators, and mechanical handling equipment
Its robust control platform makes it especially suitable for facilities where smooth acceleration, reliable overload handling, and uptime are critical to production efficiency.
Practical Advantages for Industrial Operations
The ATV71HD55N4 is designed to optimize motor performance while protecting mechanical systems and simplifying maintenance.
Main advantages
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55 kW / 75 hp power capacity for demanding industrial motors
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Sensorless flux vector control for accurate low-speed torque
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Integrated EMC filter for improved electrical compatibility
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Wide output frequency range for flexible process tuning
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High overload capacity for startup and transient loads
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Support for both asynchronous and synchronous motors
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Built-in graphic terminal for easier setup and diagnostics
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Adjustable switching frequency to balance efficiency and acoustic performance
For plant engineers, one of its biggest strengths is consistent performance in high-inertia systems without introducing unnecessary stress on motors, couplings, or driven equipment.
Technical FAQs
1. What motor power is this drive designed for?
It is rated for 55 kW (75 hp) motors on 380–480 V three-phase systems.
2. Does it support vector control?
Yes. It supports both sensorless flux vector control and closed-loop vector control.
3. Is it suitable for high-inertia applications?
Yes. It is specifically designed for complex, high-power machines.
4. What is the output frequency range?
The drive supports output frequency from 0.1 Hz up to 500 Hz.
5. Is an EMC filter included?
Yes. The ATV71HD55N4 includes an integrated EMC filter.
6. Can it control synchronous motors?
Yes. It supports both asynchronous and synchronous motor applications.
7. What is the overload capability?
It can deliver up to 174 A for 60 seconds and 191 A for 2 seconds during transient conditions.
8. Does it support long motor cable runs?
Yes. It supports up to 100 m shielded cable and 200 m unshielded cable.
9. Is it suitable for process automation?
Yes. It is widely used in industrial process systems requiring stable speed control.
10. How does it help reduce maintenance issues?
Its controlled ramp profiles, integrated diagnostics, and protection features reduce mechanical wear and simplify troubleshooting.
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