Product Core Brief
- Model: REJ603
- Brand: ABB
- Series: Relion 605
- Core Function: Self-powered overcurrent and earth-fault protection
- Product Type: Protection Relay
- Key Specs: CT-powered | No aux supply | DIP switch setting
- Condition: New Original (New Surplus)
Key Technical Specifications
- Protection Functions: Non-directional overcurrent (DMT/IDMT), earth-fault (internal/external CBCT)
- Power Source: Self-powered from current transformers
- Current Inputs: Three phase current inputs with special ring-type CTs
- Trip Output: Capacitor discharge impulse for low energy trip coils
- Communication: Limited (trip indication signal)
- Setting Method: DIP switches with transparent cover
- Mounting: Compact design for Ring Main Unit (RMU) applications
- Standards: IEC 60255 compliant
- Operating Temperature: -25°C to +55°C typical
- Additional Features: Second harmonic blocking, hand-reset flag, disturbance recording
- Event Recording: Trip indication and basic fault records
Product Introduction
ABB REJ603 is a self-powered numerical feeder protection relay from the Relion 605 series. It provides selective short-circuit and non-directional earth-fault protection for feeders in secondary distribution networks and for transformers in utility and industrial applications.
This relay operates without external auxiliary supply by harvesting power from the current transformers. It supports fast commissioning via DIP switch settings and suits compact installations such as Ring Main Units.
