ABB REJ603BBB10NN3XC Self-Powered Feeder Protection Relay
Description
ABB REJ603BBB10NN3XC Self-Powered Feeder Protection Relay is a self-powered digital relay designed for selective short-circuit and earth-fault protection in secondary distribution networks, eliminating the need for external auxiliary power.
| Specification | Value |
|---|---|
| Power Source | Derived from current transformers |
| Protection Characteristics | DMT and IDMT for overcurrent and earth-fault |
| IDMT Curves | 4 standard curves (compliant with BS142 and IEC 60255) and 3 special curves (RI, HR fuse, FR fuse) |
| Earth-Fault Measurement Modes | Internal vector summation, external CBCT input |
| Indicator LEDs | Green “Ready” LED, red “IRF” (Internal Relay Fault) LED |
Key Features:
- Self-powered operation, ideal for remote locations without auxiliary power
- Three-phase non-directional overcurrent and earth-fault protection with DMT and IDMT characteristics
- Dual earth-fault measurement modes for flexible configuration
- Integrated IEC and special IDMT curves to meet secondary distribution protection coordination requirements
- Protection blocking via second harmonic measurement to ensure stability during transformer magnetizing inrush
- Capacitive discharge pulse output for low-energy trip coils
- Built-in manually resettable mechanical flag for trip indication
- Easy configuration via DIP switches with protective transparent cover
- Compact design suitable for ring main unit (RMU) installations
- Internal self-monitoring with fault indication via red LED
Applications:
- Feeder protection in secondary distribution networks
- Transformer protection in utility and industrial sectors
- Ring main unit (RMU) installations in distribution grids
Related Models:
- ABB REJ603BB401NN3XE
- ABB REJ603 Series Protection Relays
- ABB REF630 Feeder Protection Relay