Description
Key Technical Specifications
- Model: REB670
- Brand: ABB
- Product type: Busbar protection relay (IED)
- Application: MV to EHV busbars, T-connections, meshed corners
- Rated frequency: 50/60 Hz (±10%)
- Rated current Ir: 1 A or 5 A
- Operating range: 0–100 × Ir
- Thermal withstand: 100 × Ir for 1 s; 30 × Ir for 10 s; 10 × Ir for 1 min; 4 × Ir continuously
- Burden: < 20 mVA at Ir = 1 A; < 150 mVA at Ir = 5 A
- Auxiliary DC voltage: 24–60 V DC ±20% or 90–250 V DC ±20%
- Power consumption: Typically 50 W
- Binary inputs: 16 channels
- Binary input voltages: 24/30 V, 48/60 V, 110/125 V, 220/250 V DC ±20%
- Dimensions: 483 mm (W) × 132 mm (H) × 215 mm (D)
- Operate time: Typically 12 ms for internal faults
Product Introduction
ABB REB670 is a high-performance busbar protection relay for complex substation topologies from medium to extra-high voltage. It is designed for single and double busbars, with or without transfer bus, and supports 1.5 breaker and double breaker arrangements.
The unit is built for fast, stable operation, with a typical 12 ms operate time for most internal faults and stability under external faults even with heavy CT saturation. Its low CT requirement and flexible dynamic zone selection make it a practical choice where CT circuits may be shared or bay assignments change.
