ABB REB 500 | Distributed Busbar Protection Relay | Relion Series

Product Description

The ABB REB 500 is a distributed busbar protection relay engineered for medium, high, and extra-high voltage substations. As part of the Relion® product family, it delivers fast, selective, and reliable busbar protection while integrating control and monitoring functions. Its modular architecture supports a wide range of configurations, making it suitable for complex grid applications where scalability and precision are critical.

Technical Specifications

• Model: REB 500

• Type: Distributed Busbar Protection Relay

• Weight: 2.04 kg

• Busbar Zones: Up to 32 zones supported

• Bay Capacity: Configurable from 2 to 60 bays

• Nominal Frequencies: 50 Hz / 60 Hz

• Operating Temperature: -25°C to +70°C

• Protection Principles: Low-impedance protection, stabilized differential current, directional current comparison

• Brand: ABB

• Compliance: IEC standards for EMC and safety, RoHS compliant

Functional Highlights

• Scalability: Flexible design supporting small to large substation configurations

• Advanced Algorithms: Reliable operation even under heavy CT saturation during external faults

• High-Speed Protection: Ensures rapid fault isolation to minimize system disruption

• Environmental Resilience: Wide operating temperature range for harsh industrial conditions

• Integration: Compatible with modern substation automation systems

Application Scenarios

• Busbar protection in medium-voltage substations

• High-voltage and extra-high voltage transmission substations

• Complex grid installations requiring selective and distributed protection

FAQ

Q: How many busbar zones can the REB500 manage?  A: It supports up to 32 busbar zones.

Q: What is the maximum bay capacity?  A: The relay can be configured for 2 to 60 bays.

Q: How does the REB500 handle CT saturation?  A: It uses stabilized differential current algorithms to maintain reliability during external faults.