Description
Key Technical Specifications
- Model: REB500CU03
- Brand: ABB
- Product type: Central unit
- Series: REB500 distributed busbar protection
- Application: MV, HV, and EHV busbar installations
- Protection scope: Single busbar, double busbar, transfer bus, ring bus, 1.5 breaker schemes
- Capacity: Up to 60 feeders
- Busbar zones: Up to 32 busbar zones
- Communication: IEC 61850-8-1, IEC 60870-5-103, LON
- Redundant station bus: IEC 62439
- Process bus: IEC 61850-9-2 LE
- Layout: Centralized or distributed
- Revision note: Version 8.3 is referenced in ABB release material
Product Introduction
ABB REB500CU03 is the central unit in the REB500 distributed busbar protection system. It is the processor and coordination point for the protection scheme, so it belongs in substations where the bay units and station communications already follow the REB500 architecture.
This unit is used in MV, HV, and EHV busbar protection layouts with fiber-optic bay links and IEC 61850-based communications. The system supports up to 60 feeders and 32 busbar zones, but the actual replacement still depends on the exact hardware revision, firmware level, and scheme drawing.
