REB103 ABB High-Speed Busbar Protection Relay
Description
REB103 3-Phase Bus Differential Relay is a relay-type busbar protection device manufactured by ABB, designed to monitor and protect electrical busbar systems with a unique “sum current” differential wiring configuration distinct from microprocessor-based busbar protection relays.
| Specification | Value |
|---|---|
| Product Type | 3-Phase Bus Differential Relay |
| Wiring Configuration | True “sum current” differential circuit |
| System Compatibility | Dual-bus, dual-section busbar systems |
| Version | 4.0-00 |
Key Features:
- Uses auxiliary current transformers to convert secondary currents before sum calculation for differential current measurement
- Requires switch auxiliary contacts to switch current circuits, creating a more complex wiring layout
- Separate protection panels for each bus section (Bus I and Bus II), with inter-connected current circuits via cable
- Integrated ratio braking function to handle current transformer saturation scenarios during external faults
- Supports detailed analog measurements and follows defined busbar protection principles for reliable operation
Applications:
- 220kV and similar voltage class electrical substations with dual-bus or dual-bus dual-section configurations
- Industrial power distribution systems with centralized busbar networks requiring dedicated differential protection
Related Models:
- REB101
- REB102
- REB104