ABB REJ603 Self-Powered Feeder Protection Relay for Relion 605 Series Distribution Systems
ABB REJ603 Self-Powered Feeder Protection Relay for Relion 605 Series Distribution Systems
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Brand:ABB PLC Item No.:ABB REJ603 Product Origin:Sweden Product Dimensions:96 × 160 × 150 mm Product Weight:0.9 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The ABB REJ603 Self-Powered Feeder Protection Relay is a compact and reliable protection device designed for medium-voltage distribution networks, ring main units (RMUs), and secondary substations. As part of the ABB Relion 605 Series, the REJ603 offers dependable feeder protection using a self-powered design that draws operating energy directly from current transformers (CTs).
This relay is specifically engineered for installations where auxiliary power supply is unavailable or unreliable, such as remote distribution substations, pole-mounted switchgear, and compact RMUs. By eliminating the need for external power sources, the REJ603 ensures continuous protection even during power outages.
The REJ603 integrates essential protection functions including overcurrent protection, earth-fault protection, and thermal overload monitoring, allowing utilities and industrial operators to detect and isolate feeder faults quickly. Its simple configuration, compact form factor, and robust design make it an ideal solution for modern distribution protection applications.
Technical Specifications
Parameter
Specification
Product Model
REJ603
Manufacturer
ABB
Product Type
Self-Powered Feeder Protection Relay
Series
Relion 605 Series
Rated System Frequency
50 / 60 Hz
Current Inputs
1 A / 5 A CT inputs
Power Supply
Self-powered via current transformers
Overcurrent Protection
Three stages (50/51)
Earth-Fault Protection
Two stages (50N/51N)
Trip Output
1 normally open trip contact
Binary Inputs
1 digital input
Binary Outputs
1 digital output
Event Recording
Up to ~100 events
Operating Temperature
−25°C to +55°C
Protection Class
IP40 front
Mounting Method
Panel mounting / switchgear integration
Dimensions (H × W × D)
Approx. 96 × 160 × 150 mm
Weight
Approx. 0.9 kg
Specifications may vary depending on configuration and system design.
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Applications
The ABB REJ603 relay is widely used in medium-voltage distribution protection systems where reliable feeder protection is required without an auxiliary power supply.
Typical applications include:
Ring Main Units (RMU)
Medium-voltage distribution feeders
Compact secondary substations
Pole-mounted switchgear installations
Industrial distribution networks
Remote power distribution stations
Renewable energy feeder protection systems
Its self-powered design makes it particularly suitable for rural or remote grid infrastructure.
Advantages
Self-Powered Operation
The relay operates directly from current transformer energy, eliminating the need for external auxiliary power supplies.
Compact and Robust Design
The small footprint makes it ideal for installation in compact switchgear panels and ring main units.
Reliable Feeder Protection
Three-stage overcurrent and two-stage earth-fault protection ensure accurate detection and isolation of faults.
Simplified Installation and Commissioning
Preconfigured protection functions enable faster setup and easier deployment in distribution systems.
Cost-Effective Distribution Protection
By removing the need for additional power supply equipment, the relay reduces installation and operational costs.
Technical FAQs
1. What is the primary function of the ABB REJ603 relay?
It provides feeder protection for medium-voltage distribution networks using overcurrent and earth-fault protection.
2. Does the REJ603 require an external power supply?
No, the relay is self-powered using energy from current transformers.
3. Which product series does the REJ603 belong to?
It belongs to the ABB Relion 605 series.
4. What protection functions are included?
The relay includes overcurrent protection, earth-fault protection, and thermal overload protection.
5. Where is the REJ603 typically installed?
It is commonly installed in ring main units, secondary substations, and medium-voltage distribution panels.
6. Can the relay record fault events?
Yes, it includes event recording for system diagnostics.
7. What current transformer ratings are supported?
The relay supports 1 A and 5 A CT inputs.
8. What temperature range can the relay operate in?
The typical operating range is −25°C to +55°C.
9. Is the REJ603 suitable for remote substations?
Yes, its self-powered design makes it ideal for locations without auxiliary power.
10. Why choose the ABB REJ603 relay?
Because it provides reliable feeder protection with a compact design and independent power operation.
