Description
Key Technical Specifications
- Model: REB670 1MRK004822-AC
- Brand: ABB
- Product type: Busbar and multipurpose differential protection relay
- Application: MV to EHV busbars, T-connections, meshed corners
- Zones: Up to six zones
- Fault detection: Phase-to-phase, phase-to-earth, multi-phase faults
- Voltage levels: Medium to extra-high voltage
- Protection schemes: Single, double, triple busbar with/without transfer bus
- Breaker arrangements: Double-circuit breaker and one-and-half breaker
- Rated frequency: 50/60 Hz (±10%)
- Rated current Ir: 1 A or 5 A
- Auxiliary voltage: 24–60 V DC ±20% or 90–250 V DC ±20%
- Communication: IEC 61850, GOOSE, PRP, HSR
Product Introduction
ABB REB670 1MRK004822-AC is a busbar and multipurpose differential protection IED for MV to EHV applications. ABB REB670 1MRK004822-AC is used in substation busbars, T-connections, and meshed corners, and it handles phase-to-phase and phase-to-earth faults in solidly or low-impedance earthed systems, plus multi-phase faults in isolated or high-impedance earthed systems.
This unit is chosen when the system needs selective, fast fault clearance across up to six zones, with a typical 12 ms operate time for internal faults. Confirm the exact CT circuits, zone configuration, and auxiliary supply before installation, because the wrong zone logic or CT burden can cause instability even if the hardware fits.
