ABB NBRA-656C
ABB NBRA-656C
ABB NBRA-656C
ABB NBRA-656C
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  • Lifecycle status

    Discontinued / Obsolete by OEM
    Apter Power provides verified, surplus ABB NBRA-656C replacement hardware, offering heavy industries a reliable supply channel for obsolete components to sustain dependable plant machinery operation.

NBRA-656C

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The ABB NBRA-656C is a external braking chopper designed to prevent DC bus overvoltage faults in heavy-duty industrial drive systems by dynamically routing regenerative energy to external braking resistors.
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Technical specifications for NBRA-656C

  • Manufacturer:
    ABB
  • Part Number:
    NBRA-656C
  • Product Family:
    ABB Drives
  • Product Type:
    Braking Chopper Drive Accessory
  • Stock:
    2
  • Nominal Supply Volts:
    Adjustable settings for 230V AC, 400V AC, and 500V AC lines
  • 400V Power Performance:
    Short-term: 79.5 kW (60s on / 10 min cycle) | Continuous: 9 kW
  • 500V Power Performance:
    Short-term: 88.4 kW (60s on / 10 min cycle) | Continuous: 6 kW
  • 230V / 320V DC Performance:
    Short-term: 45.7 kW (60s on / 10 min cycle)
  • Diagnostic I/O Interfaces:
    1 x Enable Input (Overtemp Interlock), 1 x Relay Output (Fault Signal)
  • Communication / Sync Link:
    Dual Fiber-Optic Ports (Transmitter / Receiver for master-slave cascading)
  • Ambient Operating Temp:
    0°C to +50°C (Derating applies above +40°C)
  • Storage & Transit Temp:
    -40°C to +70°C (Factory sealed, non-condensing atmosphere)
  • Weight:
    2.16 kg
  • Estimated shipping dimensions:
    14.5x15.5x17.5cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Sweden
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Applications Certifications Safety & Compliance

Features:

  • Dynamic Overvoltage Protection & High-Torque Braking Control
  • Onboard Safe-Interlock Guard and Reliable Thermal Diagnostic Relay
  • Fiber-Optic Cascade Link for Scalable Master-Slave Synchronization
The ABB NBRA-656C continuously tracks intermediate DC bus fluctuations to dynamically route destructive regenerative voltages straight into external resistors. This active regulation guarantees uninterrupted operation during rapid deceleration or heavy load rejection cycles, directly safeguarding internal drive capacitors from structural overvoltage breakdown.

Equipped with an autonomous hardware-level thermal switch evaluation input and an isolated form-C fault relay, the ABB NBRA-656C creates an instant safety loop. It allows for immediate hardware interlocking to isolate the main incoming three-phase power line the second an external resistor element begins to overtemperature.

Featuring high-speed onboard fiber-optic terminal ports, the ABB NBRA-656C supports advanced multi-module cascading networks for extremely high-horsepower processes. This design enables multiple choppers to synchronize their switching cycles perfectly to spread thermal dissipation across multiple resistor banks evenly without lag.

The NBRA-656C ABB Braking Chopper Drive Accessory may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
ABB NBRA-656C Braking Chopper Drive Accessory Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
ABB NBRA-656C Braking Chopper Drive Accessory

General

  • Manufacturer ABB
  • Model NBRA-656C
  • Condition New Original ready stock
  • Product Family NBIO-21CU,NBIO-31,NBIM01
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Industrial Hoists, Cranes, and Material Winches: Manages massive regenerative gravitational potential energy during downward vertical movements, ensuring steady, non-slipping mechanical deceleration curves.
  • High-Inertia Industrial Centrifuges and Decanters: Provides rapid emergency and operational braking for massive high-speed separation drums, optimizing processing loop cycle times.
  • Long-Distance Downhill Mining Conveyor Belts: Continually absorbs steady-state regenerative back-EMF power induced by gravity feeding bulky materials down steep inclines over extended operational shifts.
  • Large-Scale Air Handling and Industrial Fan Units: Controls windmilling effects and absorbs large backward inductive spikes when braking high-mass fan impellers during ventilation cycles.
  • CE Low Voltage Directive Compliance: Validated in accordance with EN 61800-5-1 safety standards regarding electrical, thermal, and energy hazards for adjustable speed electronic power drive systems.
  • UL / cUL Certification Standards: Manufactured with components conforming to rigorous North American safety listings for industrial control accessories, easing system-level panel certification.
  • RoHS Environmental Directives: Formulated and assembled using materials that comply with global restrictions on hazardous substances, preventing environmental contamination in end-of-life recycling.
  • Marine Type Approvals (System-Level context): Designed to satisfy standard industrial vibration and shock baselines, allowing integration into Type-Approved marine and offshore system enclosures.
  • Isolation and Discharging Compliance (IEC 61800-5-1): Features highly prominent high-voltage warnings requiring strict verification of zero residual energy before opening terminal guard shields.
  • Fail-Safe Interlock Thermal Protection Loop: Engineered to integrate directly with external bimetallic or PTC thermal sensors embedded inside resistor banks, executing an unconditional system stop if ventilation fails.
  • Flammaibility and Material Compliance: Constructed utilizing high-grade, self-extinguishing plastics and structural insulating components rated to UL 94 V-0 to suppress internal fire hazards.
  • Electromagnetic Compatibility (EMC) Integration: Designed to operate inside shielded cabinet systems to safely route high-frequency switching currents back to ground lines without creating cross-talk on adjacent signal lines.
Description
The ABB NBRA-656C braking chopper serves as the ultimate line of defense for industrial variable speed drives experiencing intense regenerative energy. When a high-inertia motor decelerates rapidly, it acts as a generator, pushing power back into the drive's intermediate DC circuit. The ABB NBRA-656C continuously monitors this DC bus voltage and instantaneously switches on to shunt excess energy away from the sensitive drive electronics into external power resistors, completely eliminating costly overvoltage tripping and unplanned production downtime.

Engineered for supreme flexibility across international power grids, the ABB NBRA-656C features an adjustable voltage hardware setting that easily accommodates nominal drive supply lines of 230V, 400V, and 500V. This wide input adaptability makes it an invaluable multi-application universal component for global plants running diverse automation lines. System engineers can configure the chopper's exact voltage triggering limits to seamlessly align with the specific operational parameters of their local electrical network.

Built to withstand severe cyclic thermal stresses, the ABB NBRA-656C stands out with its industrial-grade short-term power ratings, capable of handling up to 79.5 kW for 60 seconds at a 400V supply and peaking at 88.4 kW at 500V lines. This heavy-duty capacity ensures that high-torque applications—such as cranes, hoists, centrifuges, and downhill conveyors—can stop safely and reliably within tightly controlled ramp times without compromising the mechanical or electrical integrity of the system.

Beyond raw power routing, the ABB NBRA-656C features built-in intelligence for proactive drive network health monitoring. Equipped with dedicated thermal protection enable inputs, a fault-signaling relay output, and integrated fiber-optic ports, it allows for smart interlocking with the drive's main contactor. For exceptionally high-power systems requiring scalable energy dissipation, multiple ABB NBRA-656C modules can be linked via fiber optics to operate in perfect master-slave synchronization, balancing the thermal load evenly.
Alternative Names
NBRA656C 58974650 NBIO-21CU NBIO-31 NBIM01
Technical notes
The ABB NBRA-656C braking chopper requires an explicit 5-minute discharge window after mains power isolation before any physical handling or wiring adjustments are made to its DC bus terminals. Furthermore, when integrating the ABB NBRA-656C into a high-inertia application, it is highly recommended to interlock its onboard fault relay directly to the upstream main line contactor to provide instant system-wide isolation in the event of resistor overtemperature or chopper failure.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What happens if I connect a dynamic braking resistor with a resistance value lower than the specified limit on the ABB NBRA-656C?
Connecting an external resistor below the strict minimum limits of the ABB NBRA-656C (4.0Ω at 400V or 6.0Ω at 500V) will draw excessive currents during switching cycles. This directly violates the peak overcurrent threshold of the chopper's internal semiconductor switches, leading to immediate hardware trip failures or permanent thermal damage to the switching IGBT components.
Can the fiber-optic ports on the ABB NBRA-656C be used to map diagnostic variables directly to an external PLC network via fieldbus?
No, the onboard fiber-optic connections on the ABB NBRA-656C are dedicated strictly to time-synchronized master-slave cascading signals between multiple choppers. For digital PLC monitoring and system-wide diagnostic feedback, engineers must wire the physical dry-contact fault relay output (which changes state during overtemperature or component fault trips) into the digital input cards of their control architecture.
Is the ABB NBRA-656C safe to deploy in highly corrosive or hazardous marine and oil and gas environments without an extra outer cabinet?
The ABB NBRA-656C is manufactured natively with an IP00 open-chassis mechanical rating, meaning it provides zero protection against solid objects, dust, or moisture penetration. For reliable deployment in rugged offshore, chemical, or mining sectors, the ABB NBRA-656C must be securely mounted inside a properly cooled, climate-controlled, NEMA 4/12 or IP54 industrial cabinet assembly.

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