ABB REJ603BBB10NN3XB Numerical Feeder Protection Relay Technical Specifications
Manufacturer: ABB
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Part Number: REJ603 REJ603BBB10NN3XB
Condition：New with Original Package
Product Type: Protection Relays
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB REJ603 Protection Relay
The ABB REJ603BBB10NN3XB, also cataloged as the REJ603 Numerical Protection Relay, operates as a dedicated hardware component for feeder and transformer protection within secondary distribution switchgear platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | REJ603BBB10NN3XB |
| Brand | ABB |
| Origin | China |
| Weight | Refer to Nameplate |
| Dimensions | Compact module for RMU integration |
| Operating Temp | -25 deg C to +55 deg C |
| Power Consumption | Self-powered (from CTs) |
| Power Supply | CT-derived (optional auxiliary/USB) |
| Core Performance | Overcurrent (Low/High), Earth-Fault (Low/High), Inrush Detection |
Power Supply and Protective Relay Logic
The REJ603 utilizes a self-powered architecture, deriving operating energy directly from phase current and earth-fault measurement transformers. This eliminates the requirement for an external auxiliary power source, enabling deployment in remote or unmanned distribution substations. The relay executes non-directional overcurrent and earth-fault logic across configurable stages, with integrated transformer inrush detection to prevent spurious tripping during magnetizing surges. Firmware settings are managed via ABB Relion software tools, allowing for the creation of distinct setting groups. Galvanic isolation is maintained between the primary CT inputs and the internal low-energy trip coil output to ensure protection against electromagnetic transients.
Frequently Asked Questions
Q: Can the REJ603 operate if the current transformer input falls below the minimum threshold?
A: The relay requires a minimum primary current to energize the internal circuitry. Below this threshold, the relay cannot execute protection functions unless an optional auxiliary or USB power source is connected.
Q: Is the impulse output compatible with standard circuit breaker trip coils?
A: No, the output is specifically designed for low-energy trip coils. It is not suitable for driving standard high-power trip coils without appropriate interface or conversion circuitry.
Field Installation Guidelines
- Mounting: Install the relay into the designated cutout on the Ring Main Unit (RMU) or secondary switchgear panel. Ensure the chassis is securely bonded to the cabinet protective earth (PE) point to mitigate high-frequency interference.
- Wiring: Connect the phase current and earth-fault CT secondaries to the appropriate input terminals. Ensure correct phase rotation and polarity, as incorrect wiring will lead to malfunctioning of the directional or earth-fault detection logic.
- Trip Coil Connection: Connect the impulse output to the specified low-energy trip coil. Verify the coil resistance is within the relay's specified operating range to ensure successful trip signal transmission.
- Configuration: Perform initial settings verification using ABB Relion software. Test the protection stages using a secondary injection test set to validate trip thresholds and timing characteristics before placing the feeder into active service.