REF615C-D Enhanced Ruggedized Busbar Protection Relay

Description

REF615C-D

The ABB REF615C-D operates as a next-generation protection and control device for busbar systems, building on proven differential protection principles with an upgraded processing platform. It continuously monitors current flows across bus sections, analyzing data from up to 28 current transformer (CT) inputs through its enhanced multi-core processor. This enables the relay to detect internal faults within 8-12 milliseconds, a 20% improvement over previous models, while maintaining strict security against false trips—critical for industrial environments where production downtime must be minimized.

REF615C-D

Designed specifically for evolving substation architectures, this relay strengthens digital integration with IEC 61850 Ed. 2.1 compliance, including enhanced GOOSE messaging and sampled value (SV) support, while retaining full compatibility with conventional hardwired inputs. It handles diverse busbar topologies, including complex sectionalized and ring configurations, with advanced logic for automated bus transfer schemes and breaker failure protection. The ABB REF615C-D features expanded event recording capacity, storing up to 500 fault records and 100 waveform snapshots for detailed post-incident analysis, supporting both troubleshooting and compliance reporting in industrial settings.

REF615C-D

Main features and advantages:

Selecting the ABB REF615C-D delivers significant advantages for industrial and hybrid substation modernization. Its upgraded processor architecture reduces fault detection time while increasing concurrent data processing capacity, enabling simultaneous protection, monitoring, and communication functions without performance degradation. The wide-range auxiliary power supply (24-250 V AC/DC) simplifies installation across diverse industrial environments, from older facilities with legacy power systems to new installations with modern standards.

Engineered for seamless digital transition, the ABB REF615C-D supports phased migration to digital substations, allowing organizations to adopt digital instrument transformers and smart sensors incrementally while maintaining protection integrity. Its intuitive configuration via the latest ABB PCM600 software includes enhanced templates for industrial busbar configurations, reducing engineering time by up to 30% during setup. The reinforced cybersecurity framework, compliant with IEC 62443-4-2, includes secure boot and encrypted communication, protecting against evolving threats in connected industrial networks.

REF615C-D

Application fields:

The ABB REF615C-D excels in applications where digital advancement and rugged performance converge. In large industrial complexes such as automotive plants and petrochemical facilities, it protects busbars supplying multiple production lines, leveraging faster fault detection to minimize production interruptions. Its enhanced electromagnetic interference (EMI) immunity makes it ideal for steel mills and welding facilities where electrical noise is prevalent.

In distributed generation environments, including solar parks and combined heat and power (CHP) plants, the ABB REF615C-D safeguards collector busbars, managing variable renewable energy flows while providing the digital connectivity needed for grid integration. Utility substations in the midst of modernization rely on the relay to bridge legacy and digital systems, ensuring consistent busbar protection throughout the transition. Its rugged design ensures reliable operation in both indoor switchgear and outdoor substation enclosures.

Related products:

REF615C-D/Y – Variant with integrated arc flash protection for high-risk industrial areas.

REF615C-D/R – Version with redundant power supplies for mission-critical applications.

REF615C_C HCFFAEAGANB2BAN1XC – Predecessor model with core ruggedization features.

REX640 – Advanced bay control unit for complete digital integration with REF615C-D.

REF610C11LCLR – Coordinated feeder protection relay for industrial network systems.

REF543KM127AAAA – Transformer protection relay for full substation protection coverage.

ABB PCM600 v4.0 – Updated configuration software optimized for REF615C-D features.

ABB Relion 670 Secure Gateway – Add-on for enhanced cybersecurity in connected networks.

Installation and maintenance:

Before installing the ABB REF615C-D, verify auxiliary power supply stability to ensure compatibility with its wide-range input (24-250 V AC/DC), paying special attention to voltage ripple in industrial environments. For hybrid installations, map existing CT and VT connections to determine optimal integration points for both hardwired and digital inputs. Confirm network infrastructure can support Gigabit Ethernet requirements for IEC 61850 communication, particularly for sampled value transmission if using digital instrument transformers.

Ensure mounting location provides at least 100mm clearance for ventilation, as the enhanced processor generates slightly more heat than previous models. Verify panel cutout dimensions (144x144mm) for panel mount installations or DIN rail compatibility (35mm standard). For time-critical applications, synchronize with a common substation clock source to ensure <1µs accuracy for GOOSE messaging and event timestamping.

For maintenance, conduct monthly reviews of the relay’s health status and event logs using PCM600 software, with special attention to communication status in digital sections. Quarterly, inspect CT connections for tightness and corrosion, especially in humid industrial environments, and clean ventilation ports to prevent dust accumulation. Annually, update firmware to access the latest protection algorithms and security enhancements, and validate protection settings against current system loads and configurations.

Perform primary injection testing every two years to verify differential protection operation, and calibrate analog inputs if using conventional CTs. Conduct semi-annual cybersecurity audits, including password rotation and verification of access controls, to maintain IEC 62443 compliance. In harsh environments, inspect the relay’s physical enclosure for signs of damage or ingress quarterly.

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