ABB NBRA-658C Universal External Braking Chopper Module

Description

Technical Specifications

Core Braking Performance

• Peak Braking Power (400V System): 229kW for 60 seconds every 10 minutes
• Continuous Braking Power (400V System): 21kW
• Peak Braking Power (500V System): 220kW for 60 seconds every 10 minutes
• Continuous Braking Power (500V System): 13.5kW
• Maximum Braking Power (Absolute): 268kW (system and cycle dependent)
• Minimum External Braking Resistance: 1.7Ω (400V); 2.0Ω (500V)
• Voltage Compatibility: 230VAC / 400VAC / 500VAC three-phase input systems
• DC Bus Voltage Threshold: Adjustable for precise overvoltage protection

Electrical & Interface

• DC Bus Connection: Direct connection to VFD DC+ and DC- terminals
• Control Interface: Simple enable/disable signal input for integration with drive control systems
• Isolation: Full galvanic isolation between power and control circuits
• Protection Features: Over-temperature, over-current, short-circuit, and reverse polarity protection
• Status Indicators: LED indicators for power, active braking, and fault conditions

Mechanical & Environmental

• Enclosure Rating: IP00 (open-frame, for indoor cabinet installation)
• Mounting: Surface mounting (wall or panel mount)
• Dimensions: 334mm (W) × 240mm (D) × 583mm (H)
• Weight: Approx. 15kg (module only, excluding resistors)
• Operating Temperature: -10°C to +50°C
• Storage Temperature: -25°C to +70°C
• Relative Humidity: 5%–95% RH, non-condensing
• EMC Compliance: Conforms to IEC 61800-7 standards for industrial drive systems
• Certifications: CE marked; manufactured in Finland/Estonia

Key Functional Features

Universal Voltage Compatibility

• Operates with 230V, 400V, and 500V three-phase VFD systems, eliminating the need for multiple chopper models.
• Adjustable DC bus voltage threshold ensures compatibility with various drive manufacturers and models.

High Power Braking Capacity

• Delivers up to 268kW peak braking power, suitable for heavy industrial loads with high inertia.
• Supports parallel connection of multiple NBRA-658C units to achieve even higher braking power for large-scale systems.
• Optimized duty cycle (60s on / 10min off) handles frequent, high-energy braking events.

Seamless System Integration

• Direct connection to VFD DC bus terminals for straightforward installation.
• Compatible with ABB ACS550, ACS800, ACS850 drives and third-party VFDs with accessible DC links.
• Simple control interface enables easy integration with PLCs and drive control logic.

Robust Protection & Reliability

• Comprehensive built-in protection safeguards the module, VFD, and braking resistors from damage.
• Self-diagnostic functions monitor temperature, current, and voltage for fault detection.
• Industrial-grade construction ensures stable operation in harsh factory environments.

Cost-Effective Retrofit Solution

• Enables high-performance dynamic braking for existing VFD systems without replacing the drive.
• Reduces downtime by preventing DC bus overvoltage trips during critical deceleration cycles.

Application Scenarios

Heavy Industrial Machinery

• Mining & Quarrying: Controls conveyors, crushers, and hoists with high overhauling loads.
• Metal Processing: Provides rapid braking for rolling mills, extruders, and coil winders.
• Cement & Raw Materials: Brakes large rotary kilns, mills, and bucket elevators.

Material Handling & Logistics

• Crane & Hoist Systems: Ensures safe, controlled stopping for overhead cranes, gantries, and winches.
• Elevators & Lifts: Delivers smooth regenerative braking for high-rise building elevators.
• Port & Terminal Equipment: Brakes ship-to-shore cranes, straddle carriers, and bulk handling machinery.

Manufacturing & Production Lines

• Paper & Printing: Controls high-speed unwind/rewind stands and web processing lines.
• Textile Machinery: Brakes warp beams, draw frames, and high-speed looms.
• Plastics & Rubber: Provides dynamic braking for extruders, injection molding machines, and calenders.

Test & Simulation Equipment

• Dynamometers & Test Rigs: Dissipates energy during motor and powertrain testing.
• Motion Simulators: Enables precise, high-speed braking for flight and driving simulators.

Marine & Offshore

• Shipboard Cranes & Winches: Brakes heavy lifting equipment on vessels and offshore platforms.
• Propulsion & Thruster Systems: Supports regenerative braking for marine drive systems.

Power Transmission & Distribution

• Large Fans & Pumps: Controls rapid shutdowns in water treatment, HVAC, and power plant auxiliary systems.
• Compressed Air Systems: Brakes high-power compressors during emergency stops.