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Key Technical Specifications
- Product Model: REF615C_E (configuration HCFDACADABC2BAN11E)
- Manufacturer: ABB / Hitachi Energy
- Product Family: Relion® 615 series
- Application Scope: Feeder, transformer, motor, and capacitor bank protection in MV networks (up to 36 kV)
- Protection Functions: Includes 50/51 (phase overcurrent), 50N/51N (earth fault), 27/59 (under/overvoltage), 46 (negative sequence), and configurable logic (protection matrix)
- Inputs: 5 current inputs (3-phase + neutral + earth), 4 voltage inputs (line-to-line or line-to-earth)
- Outputs: 6 binary outputs (trip/close/contact), 4 binary inputs
- Communication: Dual Ethernet ports with IEC 61850 Edition 2 (GOOSE, MMS), Modbus TCP, DNP3
- Cybersecurity: Role-based access, audit trail, secure firmware update (IEC 62351 compliant options)
- Standards Compliance: IEC 60255, IEC 61850, IEEE C37.90, EN 61000-4 (EMC)
Core Performance and Selection Advantages
The REF615C_E delivers significant engineering and operational value in modern power systems through three key dimensions: performance, functionality, and total cost of ownership.
In terms of performance, the relay features a high-speed 32-bit DSP architecture with a typical operating time of <25 ms for overcurrent elements, ensuring rapid fault clearance that minimizes equipment stress and improves system stability. Its sampling rate (up to 48 samples/cycle) supports accurate harmonic analysis and disturbance recording—capabilities that surpass many legacy electromechanical and early digital relays.
Functionally, the REF615C_E integrates protection, control, monitoring, and metering into a single device. Its built-in programmable logic (using PCM600’s graphical tool) eliminates the need for external interposing relays or PLCs in many applications. The native IEC 61850 implementation—including GOOSE messaging for fast interlocking—enables seamless integration into digital substations without protocol converters. Additional features like automatic circuit breaker wear monitoring and event-triggered waveform capture enhance predictive maintenance capabilities.
From a total cost of ownership (TCO) perspective, the relay reduces project expenses by consolidating multiple devices into one footprint (saving panel space and wiring), accelerating commissioning via pre-tested configuration templates, and minimizing lifecycle costs through remote diagnostics and firmware updates. Engineering time is further reduced by standardized libraries in PCM600, which support automated testing and documentation generation.
ABB REF615C_E HCFDACADABC2BAN11E
System Integration and Expandability
Integration of the REF615C_E into utility or industrial power systems is streamlined through ABB’s PCM600 engineering tool, which provides a unified environment for configuration, simulation, testing, and reporting. PCM600 supports version control, configuration comparison, and automated compliance checks—critical for large-scale deployments and regulatory audits.
On the network side, dual Ethernet interfaces enable redundant ring topologies (e.g., PRP or RSTP) for high availability. The relay supports direct connection to SCADA via IEC 61850 MMS or Modbus TCP, and can publish real-time data to enterprise systems using OPC UA (via gateway or future firmware). For cloud-based asset management, data can be routed through Hitachi Energy’s Asset Suite or third-party platforms using standard protocols.
Expandability is addressed at both the system and application levels. Within a substation, multiple REF615 units can exchange status and trip commands via GOOSE over IEC 61850, enabling decentralized busbar or breaker failure protection without hardwiring. At the functional level, unused binary inputs/outputs and flexible logic allow adaptation to changing requirements—such as adding arc flash detection or integrating with local HMI—without hardware changes. While the relay itself is fixed-hardware, its software-defined functionality ensures long-term adaptability across evolving grid codes and operational needs.
