Application Scenarios
In a large petrochemical plant, a critical 3.3kV induced-draft fan motor, essential for furnace operation, experienced repeated, unexplained trips that halted production. The existing electromechanical relays provided limited data, making root cause analysis nearly impossible. Each shutdown resulted in significant production loss and costly restart procedures. The plant’s electrical team replaced the old protection scheme with the ABB REM615 HCMJAEADABC2BNN11E. The relay’s advanced thermal overload protection, using a precise motor thermal model, immediately provided insight: it revealed that the motor was not cooling adequately between successive start attempts during process upsets. Furthermore, its high-resolution event recorder captured a voltage dip from the grid that the old relay could not detect, which was stalling the motor. By configuring the REM615’s undervoltage restart inhibit and optimizing the start sequence, the nuisance trips were eliminated. The relay now provides continuous temperature monitoring and starts-per-hour counting, allowing for predictive maintenance and preventing costly failures.
Technical Principles and Innovative Values
Innovation Point 1: Adaptive Thermal Protection with Accurate Motor Modeling. The core intelligence of the ABB REM615 HCMJAEADABC2BNN11E lies in its advanced thermal overload protection. It doesn’t just monitor current; it runs a real-time, adaptive thermal model of the specific motor it protects. The model considers positive and negative sequence currents (for heating from unbalance), accounts for cooling during standstill and running, and uses pre-learned or user-inputted motor parameters. This allows it to accurately predict winding and rotor temperatures, preventing insulation degradation from overheating while maximizing the motor’s usable capacity, unlike traditional fixed-time relays that can be overly conservative or dangerously inaccurate.
Innovation Point 2: Integrated Sequence-of-Events and Advanced Diagnostics. The relay acts as a black-box recorder for the motor. Its high-speed event recorder with timestamp resolution better than 1ms captures not just trips, but all key events: start initiate, breaker close, protection activation. Combined with its fault waveform recording (oscillography), this allows engineers to perform detailed forensic analysis after any incident. This transforms maintenance from guesswork to precise science, drastically reducing Mean Time To Repair (MTTR) by pinpointing whether a fault was due to electrical supply, mechanical load, or motor issues.
Innovation Point 3: Modular, Code-Driven Configuration for Precise Application Fit. The suffix HCMJAEADABC2BNN11E is not a random string; it is a detailed hardware/software order code. This ensures the delivered REM615 has the exact combination of communication modules (e.g., dual Ethernet for IEC 61850. Profibus DP), binary I/O points, and software licenses (e.g., for differential protection, extended monitoring) required for the application. This “configure-to-order” principle eliminates the need for field hardware modifications, reduces panel footprint by avoiding unnecessary modules, and guarantees all features are tested and certified together as a system.
Application Cases and Industry Value
Case Study: Protecting Critical Pump Motors in a Seawater Desalination Plant.
A reverse osmosis desalination plant relied on high-pressure, multi-stage feed pumps driven by 6.6kV motors. A failure of any pump would reduce plant output by 25%. The existing protection was inadequate, having failed to prevent a previous burnout that caused a 3-week outage for rewind.
Solution: Each of the four high-pressure pump motors was fitted with an ABB REM615 HCMJAEADABC2BNN11E. The specific code ensured it had the necessary analog inputs for direct temperature RTDs from the motor bearings and windings, and the correct communication module for integration into the plant’s IEC 61850-based system.
Outcome and Value: The REM615’s bearing temperature monitoring provided an early warning for one pump, allowing scheduled bearing replacement during a planned stop, avoiding a forced outage. Its unbalance protection detected a broken rotor bar on another motor during a start, evidenced by a specific current signature, enabling repair before catastrophic failure. The plant engineer stated the REM615 HCMJAEADABC2BNN11E provided a tenfold return on investment within two years by preventing a single major motor failure. The detailed motor performance data also enabled optimized pump scheduling, reducing energy consumption.
Related Product Combination Solutions
ABB RET615: Transformer protection relay from the same 615 family. Used to protect the motor’s supply transformer, sharing the same engineering tool (PCM600) and communication philosophy for a unified bay solution.
ABB REF615: Feeder protection relay. Often used on the incomer or feeder circuits supplying the motor control center, providing backup protection and seamless integration with the REM615.
ABB REX615: Power quality and control device. Can be used in conjunction with the REM615 to provide comprehensive power monitoring (harmonics, flicker) for the entire motor bus.
ABB PCM600: The essential configuration, setting, and monitoring software for the entire Relion® 615 series. Used to program all logic, protection curves, and communication settings of the REM615 HCMJAEADABC2BNN11E.
ABB RIO600: Remote I/O module. Can be used to extend the I/O capability of the REM615. for example, to gather additional temperature or vibration signals from field sensors located far from the relay panel.
ABB Ability™ Condition Monitoring for Drives: A cloud-based analytics platform. Data from the REM615 (thermal capacity, starts, events) can be fed into such systems for fleet-wide motor health analysis and predictive maintenance strategies.
Installation, Maintenance, and Full-Cycle Support
Installation of the ABB REM615 HCMJAEADABC2BNN11E follows standard panel mounting practices. Its modular terminal blocks simplify wiring for CTs, VTs, binary signals, and communication cables. The most critical step is the correct configuration using PCM600 software. This involves entering the exact motor nameplate data (FLA, service factor, thermal limits) to “teach” the relay’s thermal model, setting all protection thresholds, and configuring the communication protocol stacks (e.g., setting up the IEC 61850 data model and GOOSE messaging for interlocking).
Maintenance is primarily data-driven and predictive. The relay requires no periodic calibration. Instead, maintenance teams should regularly download operational statistics (starts, thermal history, running hours) and review event logs. The health of the relay itself is continuously self-monitored. Firmware updates can be applied via the front USB or over the network. Should a hardware fault occur, the modular design allows for swift replacement of the communication or I/O module, or the entire unit. Due to the code-specific configuration, a replacement HCMJAEADABC2BNN11E unit or a correctly matched spare module can be re-commissioned rapidly by downloading the saved configuration file.
We provide complete lifecycle support for the ABB REM615 HCMJAEADABC2BNN11E. From verifying the order code against your application requirements, to supplying genuine, factory-tested relays with documented firmware. Our support includes assistance with PCM600 configuration file reviews, guidance on integration with DCS/SCADA systems via Profibus DP or IEC 61850. and help interpreting diagnostic data. We ensure you have a reliable partner for protecting your most critical motor assets.
Contact us for genuine ABB REM615 units, configuration support, and to discuss your specific motor protection challenges.
