ABB ACS550-01-072A-4

The ABB ACS550-01-072A-4 is an industrial-grade variable frequency drive (VFD) designed for controlling three-phase AC induction motors in general-purpose applications such as pumps, fans, and conveyors. This model is part of the ACS550 series and is now considered obsolete, with the ACS580 series serving as its successor.

Key Specifications

• Power Rating: 37 kW (50 HP)

• Input Voltage: 380–480 V, 3-phase

• Output Current: 72 A (standard load)

• Frequency Range: 0–500 Hz

• Overload Capacity:

  • 150% for 60 seconds every 10 minutes (high overload)

  • 110% for 60 seconds every 10 minutes (fan/pump rated)

• Control Modes: Sensorless Vector Control (SVC), V/f Control

• Enclosure: IP21 (indoor use)

• Dimensions: 203 mm (W) × 689 mm (H) × 262 mm (D)

• Weight: 24 kg

• Ambient Temperature Range: -15°C to +40°C

• EMC Compliance: IEC EN61800-3:2004 Category C3/C2

I/O and Communication Features

• Analog Inputs: 2 (0–10 VDC or 4–20 mA)

• Analog Outputs: 2 (4–20 mA)

• Digital Inputs: 6

• Relay Outputs: 3

• RS-485 (Modbus RTU): Yes

• PID Control: Yes

• Braking Unit: Optional

 Installation and Maintenance

• Mounting: Wall-mounted (cubicle mount)

• Cooling: Natural convection; requires 200 mm clearance above and below

• Heat Loss at Max Output: 1.12 kW

• Maintenance Recommendations:

  • Heatsink temperature check and cleaning: Every 6–12 months

  • Main cooling fan replacement: Every 6 years

  • Capacitor reforming: Annually when stored