ABB NBRA-656 Braking Chopper

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 1. Product Overview

The ABB NBRA-656 Braking Chopper is a key power electronic device used in drive systems. Its main function is to absorb and dissipate the regenerative energy generated by the motor during deceleration or braking, preventing the DC bus voltage from exceeding its rated value. NBRA-656 provides efficient and reliable braking control, suitable for various industrial motor drive systems, enhancing system safety and stability.

2. Main Technical Parameters

Electrical Data

• Model: NBRA-656

• Rated DC Bus Voltage: 600–1200 V DC (depending on drive system)

• Maximum Absorption Power: Typically 10–100 kW (based on system selection)

• Control Mode: Automatic start/stop braking

• Response Time: Fast response to protect DC bus voltage

• Protection Features: Overvoltage, short-circuit, overtemperature protection

• Interface: Connects with drive control board or control system

Mechanical & Installation

• Dimensions: Standard modular design

• Weight: approx. 5–12 kg (depending on power rating)

• Mounting: Inside drive cabinet or control cabinet

• Cooling: Forced air or natural convection

• Terminals: High-power screw terminals

Environmental & Operating Conditions

• Operating Temperature: 0°C to +50°C

• Storage Temperature: -20°C to +70°C

• Relative Humidity: 5%–95% (non-condensing)

• Protection Level: Suitable for installation inside control cabinets

• Interference Immunity: Industrial-grade EMI/RFI design

Standards & Certifications

• IEC/EN 61800 series standards

• CE, UL, RoHS certified

3. Advantages and Features

• Efficient braking energy absorption: Quickly absorbs regenerative energy and protects the DC bus

• Industrial reliability: Overvoltage, short-circuit, and overtemperature protection ensures safety

• Modular design: Easy to install, maintain, and replace

• Strong compatibility: Suitable for various ABB drives and motor systems

• Fast response: Improves system dynamic performance and safety

• Compact design: Saves space inside cabinets

4. Typical Applications

• ABB industrial drives and inverter systems

• Braking control for high-inertia loads

• Motor braking in industrial automation production lines

• Elevators, cranes, and conveyor equipment braking

• Industrial robot drive systems

• Motor drive and power module safety control

5. Application Notes

• Ensure braking chopper voltage rating is compatible with the drive DC bus

• Install in locations with adequate ventilation and cooling

• Avoid continuous operation beyond rated absorption power

• Regularly inspect terminals and device status

• Disconnect power before installation or maintenance for safety

• Avoid exposure to corrosive gases or liquids

The structure and details of the product：

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