Product Description
The ABB ACS-BRK-A is a robust braking chopper designed for seamless integration with ABB's ACS series of variable frequency drives, ensuring optimal braking performance and enhanced motor control. This braking resistor unit facilitates rapid deceleration of motors by dissipating excess energy generated during braking, preventing overvoltage faults and improving overall system reliability. The ACS-BRK-A is engineered for demanding industrial applications, providing a cost-effective solution for dynamic braking needs, and its compact design allows for easy installation within existing drive systems. With its advanced thermal management capabilities and durable construction, this braking chopper guarantees consistent performance and prolonged operational lifespan, making it an indispensable component for applications requiring precise and efficient motor control.
Is Your Device Showing These Signs?
ABB ACS-BRK-A brake resistor units commonly experience failures due to thermal overload, resulting in tripped drives and system downtime. Technicians address issues such as degraded braking performance stemming from damaged resistor elements, necessitating replacement to restore proper dynamic braking functionality. Overheating is often attributed to inadequate cooling fan operation or blocked ventilation pathways, requiring fan repair/replacement and clearing obstructions to ensure sufficient heat dissipation. Inadequate wiring connections and corrosion on terminals also contribute to malfunctions; therefore, technicians inspect and rectify wiring, clean terminals, and apply protective coatings to prevent future issues. Parameter configuration errors within the drive settings are corrected to optimize braking torque and prevent premature resistor failure.
Technical specifications
The ABB ACS-BRK-A is a robust braking chopper designed for dynamic braking of AC drives, providing a controlled and efficient method for dissipating regenerative energy. This unit features a high-power insulated-gate bipolar transistor (IGBT) to rapidly switch a braking resistor, enabling precise control over deceleration rates and preventing overvoltage faults on the DC bus of the drive. The ACS-BRK-A includes comprehensive protection features such as overcurrent, overvoltage, and thermal overload protection, ensuring reliable operation and preventing damage to the braking chopper and connected drive system. It supports a wide range of braking resistor values, allowing for customization based on specific application requirements and motor characteristics. Installation is straightforward with clearly labeled terminals and a compact design suitable for integration into existing control cabinets. The ACS-BRK-A is essential for applications requiring frequent starts and stops, high-inertia loads, or precise speed control, enhancing overall system performance and extending the lifespan of mechanical components.
Our Repair Process for the
ACS-BRK-A
Our repair process for ABB ACS-BRK-A brake resistor units begins with a comprehensive assessment to pinpoint the failure's root cause. Technicians address degraded braking performance by replacing damaged resistor elements, restoring dynamic braking functionality. Overheating issues are resolved through cooling fan repair or replacement and clearing any obstructions to ensure proper heat dissipation. Wiring connections are meticulously inspected and rectified, terminals are cleaned to remove corrosion, and protective coatings are applied to prevent future corrosion. Finally, drive parameters are corrected to optimize braking torque and prevent premature resistor failure, ensuring the unit operates within specified limits.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.

Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.

















