Product Core Brief
- Model: REJ603B2NN1NB44NNJ
- Brand: ABB
- Series: Relion 605
- Core Function: Self-powered overcurrent and earth-fault protection
- Product Type: Protection Relay
- Key Specs: CT-powered | DIP switch | RMU compatible
- Condition: New Original (New Surplus)
Key Technical Specifications
- Protection Functions: Three-stage non-directional overcurrent, two-stage earth-fault
- Power Source: Self-powered from phase current transformers
- Current Inputs: Special ring-type CTs (1 A or 5 A compatible)
- Trip Output: Capacitor discharge for low-energy trip coils
- Setting Method: DIP switches with transparent cover
- Communication: Bi-stable signal output for trip indication
- Additional Features: Second harmonic blocking, inrush detection
- Mounting: Compact design for Ring Main Units
- Standards: IEC 60255 compliant
- Operating Temperature: -25°C to +55°C
- Event Recording: Basic disturbance and trip records
Product Introduction
ABB REJ603B2NN1NB44NNJ is a self-powered numerical feeder protection relay from the Relion 605 series. It delivers selective short-circuit and non-directional earth-fault protection for feeders in secondary distribution networks and transformers in utility and industrial applications.
This variant operates without auxiliary supply by drawing power from current transformers. It enables simple commissioning through DIP switch settings and suits compact Ring Main Unit installations where auxiliary power is unavailable.
