ABB REF615E_1G

Product Description

The ABB REF615E_1G is a member of ABB’s 615 series of intelligent electronic devices (IEDs), specifically designed as a dedicated feeder protection and control relay. This unit is part of the REF615 family, which is widely recognized for its application in utility distribution networks, industrial power systems, and critical infrastructure. The ABB REF615E_1G combines comprehensive protection functions, advanced communication capabilities, and flexible configuration options within a compact, panel-mounted enclosure. It is engineered to protect and control overhead lines, cable feeders, and distribution networks, offering both overcurrent and earth fault protection with directional options. As a genuine OEM component from ABB’s grid automation portfolio, the ABB REF615E_1G provides reliable protection, measurement, and monitoring functionality essential for maintaining power system integrity.

Product Parameters

• Model: ABB REF615E_1G

• Type: Feeder Protection and Control Relay / Intelligent Electronic Device (IED)

• Protection Functions: Non-directional and directional overcurrent, earth fault protection, thermal overload, and optional voltage-based protection depending on configuration

• Current Inputs: 5A or 1A CT secondary inputs (configurable)

• Voltage Inputs: Typically 3-phase voltage inputs for directional protection, power metering, and voltage monitoring

• Control Capability: Integrated circuit breaker control with position indication, trip/close commands, and programmable logic

• Communication Protocols: IEC 61850 (including GOOSE messaging), Modbus RTU, Modbus TCP, DNP3, and IEC 60870-5-103

• Local Interface: Large graphical LCD with backlight, keypad for local operation and configuration

• Programmable Logic: Application Configuration Tool (ACT) for flexible logic design and custom protection schemes

• Power Supply: Wide-range auxiliary power supply (typically 24–250 V DC or 48–230 V AC)

• Mounting: Flush panel mount with rear terminals; also available for 19-inch rack mounting with optional adapters

• Environmental Rating: Designed for indoor and outdoor substation environments; wide operating temperature range

Advantages and Features

The ABB REF615E_1G offers a comprehensive set of features that make it a preferred choice for feeder protection applications:

• IEC 61850 Compliance: The ABB REF615E_1G fully supports IEC 61850 standards, including GOOSE messaging and horizontal communication between IEDs. This enables high-speed peer-to-peer communication, eliminating the need for hard-wired interlocking signals and reducing installation costs. Substation automation architectures benefit significantly from this advanced communication capability.

• Flexible Configuration: The ABB REF615E_1G utilizes ABB’s Application Configuration Tool (ACT), allowing users to design custom protection schemes, logic diagrams, and control sequences without requiring extensive programming knowledge. This flexibility enables the relay to adapt to a wide variety of distribution network configurations and utility requirements.

• Comprehensive Protection Suite: The ABB REF615E_1G provides robust protection functions including phase overcurrent, earth fault, and thermal overload protection. With optional directional elements, the relay can selectively identify fault direction, enabling coordinated protection schemes in looped or radial distribution networks.

• High-Accuracy Measurement: The relay offers high-precision measurement of current, voltage, power, energy, and power factor. The ABB REF615E_1G supports power quality monitoring functions, providing utilities and industrial facilities with valuable data for system analysis and optimization.

• User-Friendly Interface: The graphical LCD display with intuitive menu navigation simplifies local operation. The ABB REF615E_1G allows operators to view real-time measurements, event logs, and fault records directly at the panel, reducing the need for external tools during routine checks and troubleshooting.

• Event Logging and Disturbance Recording: The relay features comprehensive event logging (typically up to 200 events) and disturbance recording capabilities. The ABB REF615E_1G captures fault waveforms that are invaluable for post-fault analysis, system performance evaluation, and protection coordination studies.

Application Cases

The ABB REF615E_1G is deployed across a wide range of power distribution applications:

• Utility Distribution Networks: Used in primary and secondary distribution substations to protect overhead lines, underground cables, and distribution transformers. The ABB REF615E_1G provides selective fault clearing and communicates with substation automation systems via IEC 61850, enabling centralized monitoring and control.

• Industrial Power Systems: Deployed in manufacturing facilities, refineries, and chemical plants to protect medium voltage feeders supplying critical loads. The ABB REF615E_1G integrates with plant DCS and SCADA systems, providing real-time power system visibility and alarm management.

• Renewable Energy Generation: Installed in solar farms and wind power plants to protect collector systems and interconnection points. The ABB REF615E_1G supports grid code compliance with voltage and frequency protection functions essential for renewable energy integration.

• Commercial Buildings and Data Centers: Used in large commercial facilities and data centers to protect electrical distribution systems. The ABB REF615E_1G provides reliable protection for critical power infrastructure while supporting energy management and power quality monitoring initiatives.

• Mining and Heavy Industry: Found in underground and surface mining operations where reliable power distribution is essential. The ABB REF615E_1G withstands harsh environmental conditions while providing the protection required for mine power systems.

Comparison with Competing Products

When compared to alternative feeder protection relays from other manufacturers, the ABB REF615E_1G offers distinct advantages:

• IEC 61850 Implementation: While many competing relays offer IEC 61850 support, the ABB REF615E_1G provides one of the most mature and widely field-tested implementations of GOOSE messaging and horizontal communication. This maturity translates to reliable performance in substation automation applications where communication integrity is paramount.

• Configuration Flexibility: Competing protection relays often require proprietary software with steep learning curves for custom logic development. The ABB REF615E_1G with its Application Configuration Tool (ACT) offers a more intuitive graphical approach to logic design, reducing engineering time and minimizing configuration errors.

• Lifecycle Support: The REF615 series, including the ABB REF615E_1G, benefits from ABB’s long-term product lifecycle commitment. This ensures consistent availability of spare parts, firmware updates, and technical support, providing advantages over competitors who may discontinue products with shorter notice.

• Integration with ABB Ecosystem: For facilities utilizing ABB’s broader automation portfolio, the ABB REF615E_1G integrates seamlessly with ABB’s MicroSCADA, ABB Ability™, and other grid automation platforms. This integration provides enhanced system-level functionality not easily achieved with mixed-vendor protection schemes.

• Form Factor Consistency: The ABB REF615E_1G maintains physical and electrical compatibility with the broader 615 series family, allowing for consistent panel design and simplified replacement strategies across different protection applications (feeder, motor, transformer, etc.) within the same facility.

Selection Suggestions and Precautions

When selecting and configuring the ABB REF615E_1G, consider the following guidelines:

• Verify Application Requirements: The ABB REF615E_1G is a feeder protection relay. Confirm that the specific variant (indicated by the “E_1G” suffix and full ordering code) includes the necessary hardware and software features for your intended application, including the number of current and voltage inputs, communication ports, and protection function set.

• CT and PT Sizing: Ensure that the current transformer (CT) and voltage transformer (VT) secondary ratings match the relay’s input specifications. The ABB REF615E_1G typically accepts 5A or 1A CT secondaries. Incorrect CT selection will result in inaccurate measurement and potential protection misoperation. Verify that CT accuracy classes are appropriate for protection and metering requirements.

• Auxiliary Power Supply: Confirm that the auxiliary power supply voltage matches the available station battery or AC supply. The ABB REF615E_1G supports a wide range, but applying incorrect voltage or polarity can damage the internal power supply module.

• Communication Network Planning: Determine the required communication protocol and network architecture before installation. The ABB REF615E_1G supports multiple protocols, but proper planning of IP addressing, GOOSE messaging configuration, and network redundancy (if applicable) is essential for reliable system integration.

• Protection Coordination Studies: Before commissioning, conduct a protection coordination study to ensure that the ABB REF615E_1G settings coordinate properly with upstream and downstream protection devices. Incorrect coordination can result in nuisance trips or failure to clear faults selectively.

• Firmware Compatibility: When integrating the ABB REF615E_1G into an existing system, verify that the relay’s firmware version is compatible with the system engineering tools, communication gateways, and SCADA platforms used. Firmware mismatches can cause configuration upload failures or communication errors.

• Testing and Commissioning: Perform comprehensive secondary injection testing using protection relay test equipment (e.g., Omicron, Doble) to verify that all protection elements operate correctly, trip outputs function as intended, and GOOSE communication is properly established. Document all test results for regulatory compliance and future reference.

• Configuration Backup: Before placing the ABB REF615E_1G into service, save a complete backup of the relay configuration, including protection settings, logic diagrams, and communication parameters. This backup is essential for rapid restoration in the event of relay failure or accidental configuration changes.

• ESD and Handling Precautions: Handle the ABB REF615E_1G with proper electrostatic discharge (ESD) protection during installation and maintenance. Use a grounded wrist strap and work on an ESD-safe surface to prevent damage to sensitive electronic components.

• Environmental Considerations: While the ABB REF615E_1G is designed for substation environments, ensure that the installation location meets the specified temperature, humidity, and ingress protection requirements. For outdoor applications, proper enclosures with appropriate environmental ratings are necessary.