The ABB 1MRK002122-ABR05 is a highly advanced, numerical Feeder Protection and Control Relay, specifically the REF615 model, from ABB’s industry-leading Relion® 615 series. This device represents a comprehensive solution for the protection, automation, measurement, and monitoring of medium-voltage (up to 40.5 kV) feeder circuits, overhead lines, and cable systems in electrical distribution networks and industrial power systems. It integrates a complete 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 systems with isolated or compensated neutrals. Beyond protection, the ABB REF615 serves as a powerful automation platform with its configurable logic (CFC — Continuous Function Chart), enabling engineers to implement custom control sequences, complex interlocking schemes, and advanced load management without additional hardware.
As a cornerstone of modern substation automation, the ABB 1MRK002122-ABR05 functions as an intelligent electronic device (IED) that enhances grid reliability and operational intelligence. It provides high-accuracy measurement of all critical electrical parameters—currents, voltages, power, energy, and power factor—while supporting extensive communication protocols including IEC 61850 (GOOSE and MMS), IEC 60870-5-103, and Modbus. The suffix -ABR05denotes a specific hardware configuration variant, typically indicating particular I/O counts, enhanced communication interface options, and dedicated power supply specifications tailored for demanding applications. For utility operators, industrial facilities, and critical infrastructure managers, this relay ensures selective and rapid fault clearance, minimizes outage impact, and delivers actionable data for condition-based maintenance and energy optimization strategies.
Technical Specifications
Parameter Name
Parameter Value
Product Model
ABB 1MRK002122-ABR05 (Relion® REF615)
Manufacturer
ABB
Product Family/Series
Relion® 615 Series
Product Type
Feeder Protection and Control Relay (IED)
Rated Current Input
1 A or 5 A secondary from CTs (configuration specific to order code)
Voltage Input
Supports 3-phase voltage measurement via VTs for full functionality
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 menu
Power Supply
24-48/60 V DC or 110-230 V AC/DC (specific to -ABR05variant)
Operating Temperature
-40°C to +70°C
Certifications
IEC 60255, IEC 61850, UL 508, CE
Key Features and Advantages
The ABB REF615 1MRK002122-ABR05 excels through its integrated multifunctionality and superior protection selectivity. It consolidates all essential feeder protection functions into a single, compact device, significantly reducing panel space, wiring complexity, and engineering time compared to traditional relay configurations. Its advanced sensitive directional earth-fault protection is particularly crucial for networks with isolated or Petersen-coil grounded neutrals, 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 thermal history, providing proactive asset management for critical cables.
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, from legacy serial systems to fully networked substations.
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-ABR05 (REF615) is specifically engineered for the protection, control, and monitoring of medium-voltage (MV) feeder circuits across multiple critical 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, significantly improving system reliability indices like SAIDI and SAIFI. 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 critical point of interconnection 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 for comprehensive asset protection.
ABB REB615: The busbar protection relay within the 615 family, providing complete substation protection schemes when combined with feeder and transformer protection.
ABB PCM600: The universal configuration and monitoring software platform for all Relion® protection relays, enabling efficient engineering and maintenance.
ABB CTs & VTs (Current & Voltage Transformers): The external sensing devices required to provide scaled current and voltage signals to the relay for accurate protection and measurement.
ABB IEC 61850 System Configuration Tool (SCT): Specialized software for engineering complete IEC 61850 system architectures involving multiple IEDs in digital substations.
ABB Relion® 670 Series: A more advanced platform for high-voltage bay-level protection and control applications, representing the next performance tier.
Industrial Ethernet Switches: Managed network switches for building the robust IEC 61850 station bus infrastructure to which the REF615 reliably connects.
Precision Time Synchronization Clocks (GPS/IEEE 1588): Essential for providing accurate time stamps for disturbance records and enabling system-wide event correlation in modern protection systems.
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