ABB NBRA-659C Braking Chopper

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• 1. Product Overview

  ABB NBRA-659C Braking Chopper is an energy dissipation and braking protection device for motor drive systems, suitable for ABB inverters and DC drive systems. It converts excess energy generated during motor braking into heat and dissipates it through a braking resistor, preventing DC bus overvoltage and improving motor braking performance and system safety.

  NBRA-659C is compact, easy to install, and modular, widely used in industrial automation, elevators, conveyors, cranes, and other motor braking applications.

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  2. Main Technical Data

  General

  • Product type:
    Braking Chopper

  • Model:
    NBRA-659C

  • Applicable equipment:
    ABB inverters, DC drive systems

  • Control method:
    Intelligent automatic chopper control

  • Output power:
    5–50 kW (depending on application and configuration)

  • Control voltage:
    24–230 V AC/DC

  • Braking resistor:
    External resistor, matched to power

  Electrical Characteristics

  • DC bus voltage range:
    100–690 V DC (depending on model)

  • Overvoltage protection:
    Automatic chopper operation when DC bus voltage exceeds set limit

  • Operating frequency:
    50/60 Hz (control circuit)

  • Response time:
    ≤ 2 ms (typical)

  Mechanical & Environment

  • Mounting:
    Panel or control cabinet, modular arrangement

  • Housing:
    Industrial-grade flame-retardant plastic/metal

  • Operating temperature:
    -25°C to +60°C

  • Protection rating:
    IP20 (standard installation)

  Standards & Certification

  • Compliance:
    IEC 60204-1, IEC 60947-4-3, EN 60204-1

  • Operating environment:
    Industrial automation, motor drive systems, cranes, conveyors

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  3. Key Advantages and Features

  1. Overvoltage protection
     Prevents DC bus overvoltage, enhancing drive system safety.

  2. Efficient braking
     Quickly dissipates braking energy, improving motor braking performance.

  3. Intelligent control
     Automatic chopper operation adjusts braking output dynamically according to load.

  4. Modular design
     Compact and easy to install; seamless integration with ABB inverters and control systems.

  5. Durable and reliable
     Industrial-grade construction resists heat, vibration, and harsh environments.

  6. High scalability
     Configurable for different power ratings and braking resistors to meet diverse applications.

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  4. Typical Applications

  • Industrial automation production line motor braking

  • Conveyors, hoists, and cranes drive braking

  • Elevators and escalators motor braking

  • Fans, pumps, and compressors drive systems

  • Power and infrastructure automation control systems

  • Metallurgy, mining, and heavy industry motor braking

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  5. Installation and Application Notes

  1. Verify braking resistor match
     Ensure external braking resistor matches chopper power and load before installation.

  2. Correct wiring
     Connect DC bus, power, and control circuits according to the manual.

  3. Cooling requirements
     Ensure ventilation around the chopper and resistor to prevent overheating.

  4. Environmental conditions
     Avoid moisture, dust, and corrosive gases for long-term stable operation.

  5. Periodic inspection
     Check terminals, module status, and resistor temperature to ensure safe operation.

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The structure and details of the product：

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