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- ABB
- REJ603 REJ603BBB10NN3XB
- Digital Relays
- Sweden (SE)
- 177 x 177 x 150 mm
- 2.5 kg
- Xiamen, China
- New & In Stock
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
In modern medium-voltage electrical distribution systems, reliable protection equipment is essential for maintaining network stability, protecting electrical assets, and minimizing downtime caused by faults. The ABB REJ603 REJ603BBB10NN3XB Digital Relay is an intelligent protection device designed for medium-voltage feeder protection applications, providing reliable fault detection, monitoring, and protection functions.
The ABB REJ603 Digital Relay is developed for secondary distribution networks where fast response, simple installation, and dependable operation are required. It continuously monitors electrical conditions and identifies abnormal events such as overcurrent, short circuits, and earth faults, helping operators isolate faults and maintain stable power distribution.
Designed for industrial and utility applications, the REJ603 combines protection functions and diagnostic capabilities in a compact relay platform. It is suitable for medium-voltage switchgear, distribution substations, industrial power systems, and electrical automation applications.
With dimensions of 177 × 177 × 150 mm and a weight of 2.5 kg, the ABB REJ603 REJ603BBB10NN3XB Digital Relay provides a compact installation solution for protection panels and medium-voltage switchgear cabinets.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB |
| Model | REJ603 |
| Ordering Code | REJ603BBB10NN3XB |
| Product Type | Digital Relay |
| Application | Medium Voltage Feeder Protection |
| Main Function | Electrical Protection and Monitoring |
| Device Type | Intelligent Protection Relay |
| Protection Functions | Overcurrent and Earth Fault Protection |
| Installation Method | Panel Mounting |
| Dimension | 177 × 177 × 150 mm |
| Weight | 2.5 kg |
Function and Working Principle
The ABB REJ603 operates as a digital protection relay that continuously monitors electrical parameters within medium-voltage distribution systems.
During normal operation, the relay receives current measurement signals from connected current transformers. The internal processing unit analyzes these signals and compares the measured values with predefined protection settings.
When an abnormal electrical condition occurs, the relay quickly identifies the fault and activates the required protection response. The device can generate protection outputs, provide fault indications, and record operational information for troubleshooting.
The operating process includes:
- Receiving current measurement signals
- Processing electrical system data
- Evaluating protection parameters
- Detecting abnormal conditions
- Activating protection outputs
- Recording fault information
Main functions include:
- Feeder protection
- Overcurrent protection
- Earth fault protection
- Fault detection
- Event recording
- Diagnostic monitoring
Role in Industrial Power Protection Systems
The ABB REJ603 provides reliable protection for medium-voltage electrical networks by integrating essential protection functions into a compact digital relay.
It is commonly connected with:
| System Component | Function |
|---|---|
| Current Transformer | Provides feeder current measurement |
| Circuit Breaker | Performs fault isolation |
| Medium Voltage Switchgear | Controls electrical distribution |
| Ring Main Unit | Supports distribution protection |
| Control System | Provides monitoring functions |
| Maintenance System | Supports fault analysis |
The relay improves electrical system safety by detecting faults quickly and helping prevent damage to critical equipment.
Industrial Applications
The ABB REJ603 REJ603BBB10NN3XB Digital Relay is suitable for a wide range of industrial applications.
| Industry | Application |
|---|---|
| Power Utilities | Medium-voltage feeder protection |
| Manufacturing Plants | Industrial electrical networks |
| Oil and Gas | Power distribution protection |
| Petrochemical | Critical electrical systems |
| Mining Industry | Heavy-duty power applications |
| Renewable Energy | Medium-voltage collection systems |
| Water Treatment | Electrical distribution protection |
| Infrastructure Projects | Switchgear protection |
The relay is ideal for applications requiring reliable protection, compact design, and stable operation.
Installation and System Integration
Proper installation and configuration are important for achieving reliable protection performance.
Recommended installation procedures:
- Install the relay inside a suitable protection panel
- Connect current transformer input circuits
- Configure protection parameters
- Connect trip and alarm outputs
- Verify relay status indicators
- Perform commissioning tests
During commissioning, engineers should check:
- Current measurement accuracy
- Protection settings
- Output operation
- Alarm indications
- Fault recording functions
- Device status
Correct installation ensures accurate fault detection and dependable protection operation.
Protection Functions
The ABB REJ603 provides essential protection functions for medium-voltage feeder applications.
| Function | Description |
|---|---|
| Overcurrent Protection | Protects against excessive current conditions |
| Earth Fault Protection | Detects grounding faults |
| Short Circuit Protection | Provides fast fault response |
| Fault Indication | Displays protection events |
| Event Recording | Stores operational information |
| Diagnostic Monitoring | Supports maintenance activities |
These protection functions help improve electrical safety and increase system reliability.
Monitoring and Diagnostic Functions
The ABB REJ603 provides useful information for operation and maintenance teams.
| Function | Description |
|---|---|
| Fault Monitoring | Identifies electrical abnormalities |
| Event Recording | Stores fault history |
| LED Indication | Displays relay status |
| Self Diagnostics | Monitors device condition |
| Parameter Monitoring | Supports system analysis |
These features help engineers quickly identify problems and reduce troubleshooting time.
Communication and Connectivity
The ABB REJ603 supports integration into medium-voltage protection and automation environments.
| Function | Description |
|---|---|
| Protection Information | Provides fault data |
| Monitoring Data | Supports system supervision |
| Diagnostic Information | Helps maintenance analysis |
| Control Interface | Supports protection operations |
The relay can be used in both new installations and retrofit projects requiring dependable feeder protection.
Compatible Automation Systems
| System | Application |
|---|---|
| Medium Voltage Switchgear | Feeder protection |
| Ring Main Units | Distribution protection |
| Industrial Power Networks | Electrical safety protection |
| Utility Substations | Network monitoring |
| Distribution Automation Systems | Power management |
Recommended Alternative Models
| Model | Type | Application |
|---|---|---|
| ABB REJ603 | Digital Relay | Medium-voltage feeder protection |
| ABB REF601 | Feeder Protection Relay | Distribution applications |
| ABB REF615 | Feeder Protection and Control Relay | Advanced feeder systems |
| ABB REF620 | Feeder Protection Relay | Industrial power networks |
Key Advantages
- Reliable medium-voltage feeder protection
- Compact digital relay design
- Fast fault detection capability
- Supports industrial power applications
- Provides diagnostic monitoring functions
- Simple installation and commissioning
- Improves electrical system safety
- Reduces equipment damage risks
- Suitable for distribution automation systems
Technical FAQs
What is the ABB REJ603 REJ603BBB10NN3XB used for?
The ABB REJ603 REJ603BBB10NN3XB is a digital relay designed for medium-voltage feeder protection and electrical monitoring applications.
What protection functions does the ABB REJ603 provide?
It provides overcurrent protection, earth fault protection, fault detection, event recording, and diagnostic monitoring functions.
What are the dimensions of the ABB REJ603?
The dimensions are 177 × 177 × 150 mm.
What is the weight of the ABB REJ603?
The total weight is 2.5 kg.
Where is the ABB REJ603 commonly installed?
It is commonly installed in medium-voltage switchgear, distribution substations, industrial power systems, and feeder protection applications.
Conclusion
The ABB REJ603 REJ603BBB10NN3XB Digital Relay is a dependable protection solution designed for medium-voltage electrical distribution systems.
With reliable fault detection, compact design, and essential protection functions, the REJ603 helps improve power system safety, enhance equipment protection, and support stable operation of industrial and utility electrical networks.
For electrical engineers, automation specialists, and maintenance professionals, the ABB REJ603 provides an effective solution for feeder protection, fault monitoring, and medium-voltage power distribution management.