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Phone: +86 18059884790
E-mail: plc66@qq.com
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- Part number：ABB REX-B871NN-CS1B1
- Product Origin：America
- HS CODE：8708299000
- Warehouse: Spot
- Warranty： 365 days
- Quality: Original module
- Condition： New
- Shipping method: Courier delivery
- Contact person: LI MING
- Contact number: +86 18059884790
- WeChat：18059884790
- E-mail: plc66@qq.com
ABB REX-B871NN-CS1B1 Excitation Control Unit
The ABB REX-B871NN-CS1B1 is a compact, high-precision excitation control unit specifically designed for synchronous generators in medium-to-large power generation systems, including industrial backup generators, hydroelectric units, and gas turbine power plants. As a key component of ABB's generator control solutions, this unit integrates advanced closed-loop voltage regulation algorithms, real-time monitoring capabilities, and configurable protection logic to maintain stable terminal voltage, optimize reactive power output, and ensure seamless grid synchronization under dynamic load conditions. Equipped with built-in protection functions against overvoltage, undervoltage, overcurrent, loss-of-field, and field winding overheating, it safeguards generator assets from critical operational faults. The REX-B871NN-CS1B1 supports seamless communication with turbine control systems, SCADA platforms, and upper-level grid management systems via standard industrial protocols, enabling centralized remote monitoring and parameter adjustment. Its ruggedized industrial design features wide temperature tolerance, robust EMI/EMC shielding, and resistance to vibration and humidity, ensuring reliable performance in harsh on-site environments. With a modular, space-saving form factor and user-friendly configuration interface, this control unit simplifies installation, commissioning, and maintenance, making it an ideal choice for both new generator installations and retrofitting projects.
| Specification Item | Details |
|---|---|
| Product Model | ABB REX-B871NN-CS1B1 |
| Product Type | Synchronous Generator Excitation Control Unit |
| Rated Control Voltage | 110 VDC / 220 VDC (Configurable); 24 VDC Auxiliary Power |
| Field Current Regulation Range | 0–600 A DC (Dependent on Exciter Configuration) |
| Voltage Regulation Accuracy | ±0.2% of Rated Terminal Voltage |
| Control Modes | Automatic Voltage Regulation (AVR), Manual Field Control, VAR/PF Control |
| Protection Functions | Overvoltage, Undervoltage, Overcurrent, Loss-of-Field, Field Winding Overheating, Reverse Power |
| Communication Interfaces | RS-485 (Modbus RTU); Optional Ethernet (Modbus TCP/IP) |
| Operating Temperature | -20°C ~ +65°C (-4°F ~ +149°F) |
| Mounting Type | DIN Rail Mount; 19-inch Rack Mount (Optional Adapter) |
| Application Scenarios | Industrial Backup Generators, Hydroelectric Units, Gas Turbine Power Plants, Grid-connected Small Power Stations |
Important Note: The ABB REX-B871NN-CS1B1 excitation control unit must be configured and calibrated by qualified personnel with expertise in generator excitation systems. Proper synchronization with the grid and turbine control system is essential to ensure safe and efficient generator operation. Before commissioning, verify that all wiring connections comply with ABB installation guidelines and local electrical safety standards. For detailed calibration procedures, protection setting parameters, and troubleshooting steps, please refer to the official ABB product documentation or contact an authorized technical support provider.
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