Schneider ATV71HD37N4 VFD | Altivar 71 Series Drive

ATV71HD37N4 – 37kW Variable Speed Drive

Schneider Electric ATV71HD37N4 belongs to the Altivar 71 series. This drive controls asynchronous and synchronous motors with precision. Rated at 37 kW (50 hp), it handles complex, high-power machines. Input voltage range is 380-480 V AC, 3-phase, 50/60 Hz. Integrated EMC filter ensures stable operation. The graphic terminal allows intuitive monitoring and configuration.

Key Technical Data

• Manufacturer: Schneider Electric
• Product Type: Variable Speed Drive
• Series: Altivar 71
• Part Number: ATV71HD37N4
• Motor Power: 37 kW / 50 hp
• Input Voltage: 380-480 V AC, 3-phase
• Nominal Output Current: 79 A at 380 V, 65 A at 460 V
• Max Transient Current: 130 A for 2s, 118.5 A for 60s
• Output Frequency: 0.1…599 Hz
• Switching Frequency: 1…16 kHz (adjustable)
• EMC Filter: Integrated
• Graphic Terminal: Included
• Max Motor Cable Length: 100 m (shielded), 200 m (unshielded)
• Weight: 34.02 kg (75.00 lbs)
• Dimensions (HxWxD): 550 x 240 x 266 mm

Control Performance

• Speed Range: 1…100 (open-loop), 1…1000 (closed-loop with encoder)
• Speed Accuracy: ±0.01% (closed-loop), ±10% (open-loop slip)
• Torque Accuracy: ±15% (open-loop), ±5% (closed-loop)
• Transient Overtorque: 170% for 60s, 220% for 2s
• Braking Torque: ≤150% (with resistor), 30% (without)
• Motor Control Profiles: ENA, V/F (2/5 points), FVC, SFVC
• Regulation Loop: Adjustable PI regulator
• Motor Slip Compensation: Automatic, adjustable, or suppressible

Inputs & Outputs Detail

• Analog Inputs: 2 (AI1 bipolar ±10V, AI2 configurable 0-20mA / 0-10V)
• Analog Output: 1 (AO1 configurable 0-20mA / 0-10V)
• Discrete Inputs: 7 (LI1-LI6 programmable, PWR safety input)
• Discrete Outputs: 2 relay outputs (R1, R2)
• Relay Contact Rating: 5A at 250V AC (resistive)
• Internal Supply: 10.5V DC for pot, 24V DC for sensors

Communication & Diagnostics

• Protocols: Modbus (RJ45), CANopen (SUB-D 9)
• Transmission Rate: Modbus up to 38.4 kbps, CANopen up to 1 Mbps
• Diagnostic LED: 1 red LED for drive voltage status
• Protections: Overvoltage, undervoltage, overcurrent, short-circuit, thermal, phase loss
• STO Response Time: ≤100 ms (Safe Torque Off)

Environmental & Installation

• Operating Temperature: -10…50°C (no derating)
• Storage Temperature: -25…70°C
• Relative Humidity: 5…95% (non-condensing)
• Operating Altitude: ≤1000m without derating; 1000-3000m with 1% derating per 100m
• IP Rating: IP20
• Vibration Resistance: 1.5mm peak (3-13Hz), 1gn (13-200Hz)
• Shock Resistance: 15gn for 11ms
• Certifications: UL, CSA, GOST, C-tick, NOM 117
• Standards: IEC 61800-5-1, IEC 61800-3, EN 55011 Class A

Oiltech Controls’s Insight

• The ATV71HD37N4 excels in demanding applications like cranes, hoists, and extruders.
• Its integrated EMC filter reduces installation complexity and cost.
• The graphic terminal provides real-time diagnostics and quick setup.
• We recommend this drive for retrofit projects due to its robust communication options.
• For high inertia loads, use the braking resistor to achieve 150% braking torque.

Typical Applications

• Conveyor Systems – precise speed control for material handling.
• Hoists & Cranes – high torque at low speed with encoder feedback.
• Extruders & Mixers – constant torque over wide speed range.
• Pumps & Fans – energy savings with variable flow control.
• Machine Tools – accurate positioning with PI regulation.

Professional FAQ

• Q: Can ATV71HD37N4 drive a synchronous motor without an encoder?
  Yes. It supports sensorless vector control for synchronous motors in open-loop mode. Speed range is 1…50.
• Q: What is the recommended cable type for long motor runs?
  Use shielded cable up to 100m. For 200m, use unshielded cable. Ensure cable capacitance does not exceed drive limits.
• Q: How do I select the right braking resistor?
  Calculate resistor value based on DC bus voltage and braking torque. Schneider offers matching resistors for ATV71 series. Choose a resistor that can handle the transient power.
• Q: Is this drive suitable for a retrofit of an old DC drive system?
  Yes. The ATV71HD37N4 can replace DC drives in many applications. You need to check motor compatibility and encoder interface (if used). We provide technical support for retrofit planning.
• Q: What communication options are available for PLC integration?
  Modbus and CANopen are built-in. Optional cards support Profibus DP, DeviceNet, EtherNet/IP, and Modbus TCP. Choose based on your PLC network.

Shipping & Logistics

• Ships within 24-28 hours after order confirmation.
• Shipping carriers: FedEx, UPS, DHL (express worldwide).
• Tracking number provided within 24 hours.
• All packages are insured and professionally packed.

Why Buy From Oiltech Controls?

• 15+ years in industrial automation spares.
• Worldwide shipping with real-time tracking.
• Tested surplus/refurbished options – quality assured.
• 12-month warranty on every product.
• Pre-shipment technical verification to ensure functionality.
• Expert help for obsolete control systems.

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