Schneider ATV71HC11N4

1. Overview

The ATV71HC11N4 is a high-performance variable speed drive (VSD) from Schneider Electric’s ATV71 series, engineered for medium-power industrial drive applications with a rated power of approximately 110 kW. This series is renowned for its modular design, high configurability, and robust construction tailored for harsh industrial environments, making it widely deployed across diverse industrial automation scenarios.

As a core component of industrial drive systems, the ATV71HC11N4 delivers stable and precise speed and torque control for three-phase motors, meeting the demanding operational requirements of modern industrial production and enhancing the efficiency and reliability of mechanical equipment.

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2. Technical Parameters

Parameter	Description
Power Rating	110 kW (approx. 150 HP)
Phase	3P (suitable for three-phase motors)
Voltage	380 VAC (480 V support is also available as standard)
Enclosure Rating	IP20 (open type, non-protected) or IP54 (protected type)
Protective Coating	Reinforced EMC coating
Control Panel	Chinese language panel option supported
Safety Functions	Safe Torque Off (STO) and other core safety features supported

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3. Product Features

• Modular Design: Adopts a fully modular structure, allowing users to flexibly configure power modules, control modules and power supply modules based on actual application needs. This design simplifies installation, commissioning, maintenance and later upgrades, reducing overall operational costs and improving equipment adaptability to diversified working conditions.
• Multiple Control Modes: Supports a full range of advanced control modes, including V/F control, Flux Vector control and Direct Torque Vector control, as well as sensor and sensorless operation modes. It achieves high-precision motor control, ensuring stable operation under no-load, light-load and heavy-load conditions, with outstanding dynamic response performance.
• Superior Communication Capabilities: Equipped with a wealth of communication interface options, such as Ethernet/IP, Profibus, Modbus Plus, CANopen and other mainstream industrial communication protocols. It enables seamless integration with industrial Ethernet and fieldbus networks, facilitating remote monitoring, data transmission and centralized control of the drive system, and adapting to intelligent industrial automation architectures.
• Comprehensive Safety Functions: Built-in dedicated safety function modules, supporting multiple safety logics including emergency stop, speed limitation and soft start. It complies with international industrial safety standards, effectively preventing equipment damage and personal safety hazards caused by abnormal operation, and enhancing the safety of the entire drive system.
• High Reliability: Certified for EMC compliance, with strong resistance to electromagnetic interference, making it highly adaptable to complex and harsh industrial on-site environments with heavy electromagnetic interference. The rugged hardware design and optimized heat dissipation structure ensure long-term stable and maintenance-free operation, reducing equipment downtime.

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4. Structure and Components

• Power Supply Module: Acts as the power core of the drive, responsible for converting the input industrial grid voltage into stable DC voltage, providing reliable power support for all internal circuits of the drive and ensuring the stable operation of core components.
• Power Module (IGBT): The core power execution component, mainly responsible for switching and regulating the motor current, and directly determining the output power and operational performance of the drive. It adopts high-quality IGBT chips to ensure efficient energy conversion and low loss.
• Control Module: The central control unit of the drive, equivalent to its "brain". It executes advanced control algorithms (such as vector control), processes external input signals, generates high-precision PWM signals, and transmits them to the power module to achieve precise control of motor speed and torque.
• Communication/Interface Module: Provides comprehensive external signal input/output, communication protocol conversion and network access functions. It realizes data interaction between the drive and upper computers, PLCs and other automation equipment, laying a foundation for system interconnection and intelligent control.
• Input/Output Terminals: Includes complete terminal configurations such as motor connection terminals, main power terminals, communication terminals and logic input/output terminals. The standardized terminal design ensures convenient and reliable wiring, meeting the wiring requirements of various industrial applications.

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5. Installation and Maintenance

 Installation Guidelines

• Electrical Connections: Strictly ensure that all wiring complies with international and industrial electrical standards. Focus on firm and reliable wiring of main power and motor terminals to avoid poor contact, virtual connection or short circuit. It is recommended to use standard coaxial cables conforming to MIL-C-17 or NF C 93-550 specifications to guarantee signal and power transmission stability.
• Heat Dissipation and Protection: If installed in a closed cabinet, reserve sufficient heat dissipation space around the drive to ensure smooth air circulation and prevent overheating damage. Keep all ventilation ports and connection ports unobstructed, and avoid dust, debris or moisture from entering the interior of the drive.
• Grounding: Standardized and reliable grounding is critical. Implement correct grounding operations in accordance with electrical safety specifications to effectively suppress electromagnetic interference (EMI), protect the drive from surge voltage damage, and ensure the personal safety of operators and stable equipment operation.

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