Schneider Altivar 21 ATV21WU55N4C Variable Frequency Drive

Description

The ATV21WU55N4C is a Variable Speed Drive from the Altivar 21 series, designed by Schneider Electric to deliver precise and energy-efficient motor control for commercial and industrial applications. This drive features a power rating of 5.5 kW (7.5 HP) and operates seamlessly at a supply voltage of 480 V. To minimize electromagnetic interference and comply with strict noise regulations, the unit features an integrated Class B EMC filter.

Engineered with an robust IP54-rated housing, the ATV21WU55N4C provides strong protection against dust ingress and water splashes, allowing for direct installation in demanding environments without requiring an additional protective cabinet. This makes it highly efficient for optimizing motor performance in HVAC, ventilation, and decentralized pumping operations. While currently classified in the phase-out lifecycle stage, it remains a trusted components for system upgrades and drop-in replacements.

Features

• Robust IP54 degree of protection for harsh or decentralized environments
• Integrated Class B EMC filter for optimal noise reduction
• High-performance speed regulation for three-phase motors
• Rated for 5.5 kW (7.5 HP) output at 480 V operation
• Tailored for energy savings in fan, pump, and HVAC applications

Applications

• Heating, ventilation, and air conditioning (HVAC) systems
• Decentralized industrial pump stations
• Commercial blower and exhaust fan systems
• Fluid distribution and cooling tower operations

Technical Specifications

Installation Guidelines

• Mounting: Mount the drive vertically on a flat, solid, non-flammable surface to maintain proper airflow and preserve the integrity of the IP54 environmental seal.
• Environment: Ensure the operating environment stays within specified thermal limits; protect the drive from direct exposure to corrosive chemicals or continuous outdoor solar loading.
• Grounding: Establish a secure, low-impedance earth ground connection to ensure safety and full operation of the Class B EMC filter.
• Wiring: Use screened/shielded motor cabling to comply with EMC guidelines, keeping power lines isolated from low-voltage control and communication wiring.
• Cooling: Keep the surrounding cooling fins clear of debris and maintain the recommended structural clearances above and below the device.