Description
Key Technical Specifications
- Model: REB500
- Brand: ABB
- Product type: Numerical busbar protection
- Application: MV, HV, and EHV busbar installations
- Nominal frequency: 50 Hz, 60 Hz, and 16.7 Hz
- 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
- Fault coverage: Phase and earth faults in grounded systems, phase faults in ungrounded systems
- Communication: IEC 61850-8-1, IEC 60870-5-103, LON, IEC 62439
- Process bus: IEC 61850-9-2 LE
- Architecture: Modular, centralized or distributed
- Firmware/version note: Version 8.3 referenced in ABB release note
Product Introduction
ABB REB500 is a numerical busbar protection system used in MV, HV, and EHV substations where fault isolation speed matters. ABB REB500 is built for selective busbar protection, so it is not the right choice for a generic relay swap unless the whole scheme and communications match.
The platform supports distributed or centralized layouts, with fiber-optic links between bay units and the central unit. Version 8.3 is a known release point, and the exact hardware code, software version, and bay configuration should be verified before replacement because the wrong revision can still fit the panel but fail the protection scheme.
Key Selling Points & Differentiators
- High-speed selective busbar protection for substations, with coverage for single, double, ring, and 1.5 breaker schemes.
- Supports up to 60 feeders and 32 busbar zones, which matters in larger yards and expansion projects.
- Fiber-optic links help keep data transfer stable near high-voltage conductors.
- Modular layout lets the system be installed in centralized or distributed configurations.
- We can support incoming inspection, serial and label review where available, visual condition checks, and a test record if the unit is bench-verified.
- Compared with a standard overcurrent relay, this platform is scheme-specific and should be matched to the busbar architecture, not just the voltage class.
- Not recommended for a blind replacement unless the CT circuit, bay unit arrangement, and communication path are confirmed from the drawing set.
- Verification should follow the OEM manual and protection coordination study; for this class, test method and wiring logic matter as much as the nameplate.
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