ABB ACS550-01-125A-4 Inverter Drive – 45kW/55kW, IP21

The ABB ACS550-01-125A-4 inverter drive is a high-capacity, industrial-grade VFD designed for motors up to 55 kW. Delivering precise and efficient control, it is ideal for large-scale HVAC systems, pumping stations, conveyors, and heavy-duty automation environments.

With selectable VxF or sensorless vector control, integrated Modbus RTU communication, and a robust R5 frame, this ABB drive ensures long-term performance under demanding operating conditions.

Technical Specifications

Model: ACS550-01-125A-4
Series: ACS550
Type: Variable Frequency Drive (VFD)
Power Output: 45 kW (60 HP) at High Overload / 55 kW (75 HP) Fan & Pump Duty
Enclosure: IP21
Mounting: Wall or Cubicle Mount
Application: Pumps, fans, HVAC, water treatment, material handling, and heavy process systems

Electrical Specifications

• Input Voltage: 380–480 V AC (±10%)
• Phase: 3-phase
• Frequency Range: 50–60 Hz (±5%)
• Output Frequency: 0–500 Hz
• Output Current (HO / ND): 87 A (High Overload) / 125 A (Normal Duty)
• Overload Capacity: 150% for 60 s (HO) / 110% for 60 s (ND)
• Control Type: VxF and Sensorless Vector Control
• Brake Chopper: Not included (external braking unit optional)
• Heat Dissipation: Max 1.44 kW

I/O and Communication

• Digital Inputs: 6 programmable
• Analog Inputs: 2
• Analog Outputs: 2
• Relay Outputs: 3 contact sets
• Keypad: Assistant Control Panel (included)
• RS-485 / Modbus RTU: Built-in

Mechanical and Environmental

• Mounting Type: Wall or cubicle-mounted
• Frame Size: R5
• Weight: 34 kg
• Dimensions: 736 × 265 × 286 mm (H × W × D, incl. gland kit)
• Cooling: Internal fan (ventilation: 200 mm above/below, 0 mm sides)
• Mounting Holes: 4 × 6.5 mm slotted holes (238 mm × 588 mm centres)
• Operating Temp: Up to +40 °C ambient

Compliance and Certifications

• CE Certified
• UL / cUL Listed
• EMC Compliance: IEC EN61800-3:2004 (C3/C2)
• RoHS Compliant
• Manufacturing Standards: ISO 9001, ISO 14001

Replacement Information

The ABB ACS550 series has been replaced by the ABB ACS580 as of January 2018
ACS580 equivalents offer improved efficiency, diagnostics, and connectivity

Key Benefits of the ABB ACS550-01-125A-4

✅ High-Power Motor Control: Designed for motors up to 55 kW.

✅ Built-In Communication: RS-485 Modbus for easy system integration.

✅ Flexible Mounting: Supports wall or cubicle installations.

✅ Efficient Cooling Design: Manages 1.44 kW of heat with built-in ventilation.

✅ ABB Reliability: Trusted by industry professionals worldwide.

📦 In Stock Now at Drive Outlet Megastore

At Drive Outlet Megastore, we offer unbeatable prices on the ABB ACS550-01-125A-4 inverter drive.

This high-output ABB VFD delivers performance, efficiency, and dependability—built for your most critical motor control needs.

Request a quote or contact us today

Trusted ABB Drives. Fast Delivery. Lowest UK Prices – Only at Drive Outlet Megastore.