20 HP HVAC VFD with 480 V input and 31 A output, ideal for efficient control of commercial fans and pumps.

ABB ACH550-UH-031A-4 | 3AUA0000004054

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ABB ACH550-UH-031A-4 | 20 HP HVAC VFD, 480 V, 31 A, NEMA 1 Enclosure

Global Commercial Alias: ACH550-UH-031A-4
Product ID: 3AUA0000004054
ABB Type Designation: ACH550-UH-031A-4
Catalog Description: HVAC AC Drive, 3-phase, 20 HP, 31 A, 480 V, NEMA 1 enclosure

Overview

The ABB ACH550-UH-031A-4 is a strong and energy-saving variable frequency drive (VFD) crafted for HVAC applications. Delivering 20 HP power with 480 V input and 31 A output, this drive ensures precise motor control for fans, pumps, and air handling systems.

Key Features

Motor Power: 15 kW (20 HP)
Input Voltage: 380–480 V AC, 3-phase
Output Current: 31 A
Frequency Range: 0 to 500 Hz
Control Modes: Scalar (V/f), Sensorless Vector
Overload Capacity: 110% for 60 seconds (light duty)
EMC Filter: Integrated (C2 compliant)
Safety Function: Safe Torque Off (STO)
Communication: Built-in Modbus RTU, BACnet MS/TP, N2
User Interface: HVAC-specific control panel with LCD
Enclosure: NEMA 1 (UL Type 1)
Cooling Method: Forced air cooling

Technical Specifications

Model Number: ACH550-UH-031A-4
Input Frequency: 50/60 Hz
Analog Inputs: 2
Digital Inputs: 6
Analog Outputs: 2
Relay Outputs: 3
Operating Temperature: -10°C to +40°C
Dimensions (H x W x D): 610 mm x 203 mm x 229 mm
Weight: Approx. 14.1 kg
Certifications: UL, cUL, CE

Applications

HVAC control in commercial buildings
Fans, pumps, and VAV systems
Energy-saving motor operation in automation
Building management systems integration

Product Description

The ABB ACH550-UH-031A-4 VFD is tailored for HVAC needs, offering reliable performance and intelligent control. It simplifies setup, supports multiple communication protocols, and optimizes energy use while extending motor life.

Why Choose ABB ACH550-UH-031A-4?

20 HP drive built for HVAC precision
Seamless installation with built-in BACnet and Modbus
Durable NEMA 1 design for indoor applications
ABB’s industry-leading reliability and efficiency

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1-Year Warranty Coverage Every new product purchased from PLCVERSE includes a full 1-year warranty. We stand behind the quality and durability of our automation components, providing protection against manufacturing defects under normal use. Our commitment is to ensure you receive dependable, high-performance parts with complete peace of mind.

PLCVERSE is an independent seller of industrial automation equipment. We are not an authorized distributor, partner, or representative of any of the manufacturers featured on this website. All brand names, trademarks, and logos remain the property of their respective owners. PLCVERSE has no association or endorsement from ABB, Fanuc, B&R, Rockwell Automation, Schneider Electric, Siemens, or any other brands mentioned.