The ABB 1MRK002122-ABR03 is a sophisticated numerical Feeder Protection and Control Relay, specifically the REF615 model from ABB’s renowned Relion® 615 series. This device is engineered to provide comprehensive protection, automation, measurement, and monitoring for medium-voltage feeder circuits, overhead lines, and cable systems in distribution networks and industrial power applications. It integrates a full suite of protection functions including overcurrent (definite and inverse time), directional and non-directional earth-fault, thermal overload for cable protection, and sensitive directional earth-fault protection for isolated or compensated neutral systems. The ABB REF615 transcends traditional protection by incorporating advanced programmable logic (CFC) that enables engineers to implement custom automation sequences, interlocking schemes, and load management logic without additional hardware.
As a key component in modern substation automation, the ABB 1MRK002122-ABR03 serves as an intelligent electronic device (IED) that enhances grid reliability and operational intelligence. It delivers high-accuracy measurement of all critical electrical parameters including currents, voltages, power, energy, and power factor, while supporting extensive communication protocols such as IEC 61850 (GOOSE and MMS), IEC 60870-5-103, and Modbus. The suffix -ABR03indicates a specific hardware configuration variant, which typically includes particular I/O counts, communication interface options (likely with enhanced Ethernet capabilities), and power supply specifications. For utilities, industrial facilities, and critical infrastructure operators, this relay ensures selective fault clearance, minimizes outage durations, and provides valuable operational data for condition-based maintenance and energy optimization initiatives.
Technical Specifications
Parameter Name
Parameter Value
Product Model
ABB 1MRK002122-ABR03 (Relion® REF615)
Manufacturer
ABB
Product Family/Series
Relion® 615 Series
Product Type
Feeder Protection and Control Relay (IED)
Current Input
1 A or 5 A secondary from CTs (specific to order configuration)
Currents, voltages, active/reactive power, power factor, frequency, energy (kWh, kVARh) with Class 0.5/1.0 accuracy
Communication Ports
2 x Ethernet (IEC 61850-8-1, Modbus TCP), 2 x RS485 (Modbus RTU, IEC 60870-5-103), 1 x USB (service)
Disturbance Recorder
Extended fault recording with pre- and post-fault waveforms
HMI
Large graphical LCD with multilingual interface
Power Supply
24-48/60 V DC or 110-230 V AC/DC (specific to -ABR03variant)
Operating Temperature
-40°C to +70°C
Certifications
IEC 60255, IEC 61850, UL 508, CE
Key Features and Advantages
The ABB REF615 1MRK002122-ABR03 distinguishes itself through integrated multifunctionality and superior protection selectivity. It consolidates all essential feeder protection functions into a single device, significantly reducing panel space, wiring complexity, and engineering time compared to traditional relay configurations. Its advanced sensitive directional earth-fault protection is particularly valuable for networks with isolated or compensated neutral grounding, enabling precise identification and selective isolation of faulted feeders. The thermal overload protection employs a sophisticated cable thermal model that prevents damage based on actual load current and duration, providing proactive asset protection.
1MRK002122-ABR02
Advanced automation capabilities and seamless communication are fundamental to its design. The powerful CFC (Continuous Function Chart) logic enables the creation of complex, application-specific control schemes directly within the relay, eliminating the need for external PLCs or extensive hardwired logic for functions like busbar transfer, interlocking, and load management. Native support for IEC 61850 (including GOOSE for fast peer-to-peer communication) makes it an ideal component for modern digital substations, enabling efficient engineering, interoperability, and reduced copper wiring. The dual Ethernet and serial ports provide flexible integration options for virtually any network architecture.
Comprehensive diagnostics and user-centric operation deliver significant operational benefits. The relay functions as a high-class power quality analyzer and energy meter, providing detailed insights for efficiency improvements and condition monitoring. The extensive disturbance recorder with time-synchronized waveforms and sequence of events is invaluable for rapid post-fault analysis and root cause determination. The intuitive graphical local HMI combined with the powerful PCM600 engineering tool simplifies configuration, setting management, and maintenance procedures. For asset managers, the ABB REF615 transforms from a simple protection device into an intelligent grid asset that maximizes reliability, provides actionable operational data, and supports predictive maintenance strategies.
Application Areas
The ABB 1MRK002122-ABR03 (REF615) is specifically designed for the protection, control, and monitoring of medium-voltage (MV) feeder circuits across multiple sectors.
In utility distribution networks, it is extensively deployed in primary and secondary substations to protect overhead lines and underground cable feeders. Its auto-reclosing function is particularly valuable for quickly restoring service after transient faults. Within industrial facilities (chemical plants, mining operations, manufacturing complexes), it protects incoming utility feeders, main plant transformers, and critical distribution feeders to process units, ensuring selective coordination to minimize production disruption during electrical faults.
For renewable energy installations such as solar PV farms and wind parks, it protects the collector feeders that aggregate power from multiple inverters or turbines, and the connection point to the main grid. In critical infrastructure projects including data centers, airports, and hospitals, it secures medium-voltage ring main units (RMUs) and ensures high power availability through selective protection. The relay is also commonly used in water and wastewater treatment facilities for protecting pump station feeders and distribution systems. Essentially, any application requiring reliable, selective, and intelligent protection for three-phase AC feeders up to 40.5 kV represents an ideal application for the REF615 relay.
Related Products
ABB RET615: The transformer protection relay from the same Relion® 615 series, frequently used in conjunction with REF615 in substation applications.
ABB REB615: The busbar protection relay within the 615 family for comprehensive substation protection schemes.
ABB PCM600: The universal configuration and monitoring software platform for all Relion® protection relays.
ABB CTs & VTs (Current & Voltage Transformers): The external sensing devices required to provide scaled current and voltage signals to the relay.
ABB IEC 61850 System Configuration Tool (SCT): Specialized software for engineering complete IEC 61850 system architectures involving multiple IEDs.
ABB Relion® 670 Series: A more advanced platform for high-voltage bay-level protection and control applications.
Industrial Ethernet Switches: Managed network switches for building the IEC 61850 station bus infrastructure to which the REF615 connects.
Precision Time Synchronization Clocks (GPS/IEEE 1588): To provide accurate time stamps for disturbance records and system-wide event correlation.
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