Schneider Altivar 21 ATV21HD18N4 Variable Frequency Drive

Description

The ATV21HD18N4 is a Variable Frequency Drive (VFD) from the Altivar 21 series, engineered for precise speed and torque management of three-phase asynchronous motors. Designed for a power rating of 18.5 kW (25 HP) at an operating voltage of 480V, this drive provides high-performance control for industrial motor applications. The ATV21HD18N4 includes an integrated EMC filter (Class A) to minimize conducted emissions and is housed in an IP20-rated enclosure, making it suitable for mounting within clean, protected electrical control panels.

Features

• Dedicated control for three-phase asynchronous motors
• Integrated EMC filter (Class A) for electromagnetic compatibility
• Compact and robust design for rack or cabinet mounting
• Energy-efficient operation for pump and fan control
• Reliable speed and torque regulation

Applications

• HVAC systems (commercial and industrial fans)
• Industrial pumping and fluid distribution
• Building automation systems
• Centrifugal process machinery
• Light-duty manufacturing conveyors

Technical Specifications

Installation Guidelines

• Mounting: Mount the drive in a vertical orientation within a clean, ventilated electrical enclosure. Ensure clear space above and below the unit for air intake and exhaust.
• Environmental: The IP20 rating requires installation in an environment protected from moisture, dust, and conductive particles.
• Wiring: Use shielded cabling for motor leads to comply with EMC Class A requirements. Connect power and motor terminals firmly according to the specified torque settings.
• Grounding: A secure, high-integrity chassis ground is necessary to maintain safety and ensure effective EMC filtering.
• Ventilation: Do not obstruct the integrated cooling fans. Monitor the ambient temperature within the cabinet to prevent thermal derating.