ABB VFD 3 phase ACH550 / ACH580 20HP - 60HP Drive W/Bypass "refurbished"


Size: ACH550-VCR-078A-4

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Removed from service fully functional

The ACH550-VCR is a model of AC drive manufactured by ABB, a global leader in power and automation technologies. These drives are used to control the speed and torque of electric motors, which can significantly enhance the efficiency and performance of various industrial processes. Below is a detailed technical overview of the ACH550-VCR-078A-4:

Key Specifications:

  1. Power Rating:

    • Voltage: 3-phase, 380-480V ±10%
    • Current: Nominal output current of 78A
    • Power: Suitable for motors with a power rating typically around 45 kW (60 HP) depending on application and motor efficiency.
  2. Frequency Range:

    • Input Frequency: 48-63 Hz
    • Output Frequency: 0 to 500 Hz
  3. Control Methods:

    • Scalar Control (V/Hz): Suitable for simple applications requiring basic speed control.
    • Vector Control: For applications requiring higher performance, including better torque control and dynamic response.
  4. User Interface:

    • Control Panel: An alphanumeric keypad with an LCD display for programming and monitoring drive parameters.
    • Communication: Options for various fieldbus protocols like Modbus, BACnet, N2, and FLN.
  5. Protection Features:

    • Overvoltage and Undervoltage Protection: Ensures the drive and motor are protected from fluctuations in power supply.
    • Overcurrent Protection: Prevents damage due to excessive current.
    • Thermal Protection: Monitors the temperature of the drive and motor to avoid overheating.
    • Ground Fault Protection: Detects and protects against ground faults.
  6. Environmental Ratings:

    • Operating Temperature: Typically -15°C to +40°C without derating; up to 50°C with derating.
    • Enclosure Protection: Generally IP21 (for standard indoor use) or IP54 (for more demanding environments).
  7. Certifications and Standards:

    • CE Marked: Complies with European safety, health, and environmental requirements.
    • UL Listed: Complies with Underwriters Laboratories standards for safety.

Features and Capabilities:

  1. Energy Savings:

    • Optimized motor control algorithms for energy efficiency.
    • Energy optimization function to adjust the voltage and frequency for maximum efficiency at all loads.
  2. Flexibility and Integration:

    • Multiple I/O options including analog and digital inputs/outputs for integrating with various control systems.
    • Integrated PID control for process control applications.
  3. Ease of Use:

    • User-friendly setup with pre-configured macros for common applications.
    • Extensive diagnostics and fault logging for easy troubleshooting and maintenance.
  4. Performance:

    • High starting torque capability.
    • Smooth and precise speed control even at low speeds.

Typical Applications:

  • HVAC Systems: Controlling fans, pumps, and compressors to maintain optimal environmental conditions and reduce energy consumption.
  • Water and Wastewater Treatment: Pump control to manage water flow and pressure efficiently.
  • Industrial Automation: Controlling conveyors, mixers, and other machinery to enhance process control and productivity.

Installation Considerations:

  • Ensure adequate ventilation and cooling as per the drive's specifications to avoid overheating.
  • Proper grounding and electrical isolation to prevent electrical noise and interference.
  • Following ABB's guidelines for wiring, programming, and commissioning to ensure safe and efficient operation.


The ABB ACH550-VCR-078A-4 is a versatile and robust AC drive suitable for a wide range of industrial applications. Its advanced control features, combined with ease of use and comprehensive protection mechanisms, make it an excellent choice for enhancing motor performance and efficiency.

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