Schneider Altivar 21 ATV21HD37N4 Variable Frequency Drive

Description

The ATV21HD37N4 is a Variable Speed Drive from the Altivar 21 series, designed by Schneider Electric to provide precise motor control for demanding industrial applications. This drive is rated for an output power of 37 kW (50 HP) and is engineered for operation with a 480 V supply. It incorporates an integrated Class A EMC filter to minimize electromagnetic interference, supporting reliable operation in standard industrial electrical environments.

The ATV21HD37N4 is specifically optimized for applications requiring efficient speed and torque regulation, such as HVAC systems, centrifugal pumps, and fan control. The unit is housed in an IP20-rated enclosure, providing a compact footprint that allows for efficient installation within electrical cabinets and control panels. As a phase-out product, this drive remains a dependable choice for maintenance and upgrades in existing industrial control architectures.

Features

• Optimized for HVAC, pump, and fan control applications
• Integrated Class A EMC filter for reliable electrical performance
• High-performance motor speed and torque regulation
• Compact design for simplified integration into electrical panels
• Rated for 37 kW (50 HP) output at 480 V operation

Applications

• HVAC ventilation and climate control systems
• Centrifugal pump operations
• Industrial blower and compressor systems
• Fluid circulation and process cooling equipment

Technical Specifications

Installation Guidelines

• Mounting: Install the drive in a vertical position on a clean, solid, non-flammable surface.
• Ventilation: Ensure adequate clearance is maintained above and below the drive to facilitate effective airflow and heat dissipation.
• Grounding: Connect the drive to a secure, low-impedance earth ground to ensure safe operation and maximize the effectiveness of the integrated EMC filter.
• Wiring: Keep motor cables as short as possible and route them separately from sensitive control signal wiring to prevent electromagnetic interference.
• Environment: Do not operate the unit in areas exposed to corrosive gases, high humidity, or temperatures exceeding the specified operational limits.