ABB REG670

Description

Product Description

The ABB REG670 is a sophisticated generator protection relay from ABB’s Relion® 670 series, designed specifically for comprehensive protection, control, and monitoring of generators in power generation applications. As part of ABB’s advanced protection and control portfolio, this IED (Intelligent Electronic Device) provides complete protection for generators of all sizes, from small industrial generators to large utility-scale units in thermal, hydro, and gas turbine power plants. The core function of the ABB REG670 is to continuously monitor generator electrical parameters and initiate rapid, selective tripping when fault conditions are detected, protecting expensive generation equipment from damage. It provides a comprehensive suite of protection functions including differential protection (87G), loss of field (40), out-of-step (78), overexcitation (24), stator ground fault (64S), rotor ground fault (64R), overcurrent (50/51), negative sequence overcurrent (46), reverse power (32R), and many others. Additionally, the ABB REG670 provides extensive monitoring, control, and communication capabilities for integration into modern power plant automation systems.

Product Parameters

• Model Number: ABB REG670
• Type: Generator Protection Relay
• Series: ABB Relion® 670 Series
• Application: Generator protection, control, and monitoring
• Protection Functions: Differential (87G), loss of field (40), out-of-step (78), overexcitation (24), stator ground (64S), rotor ground (64R), overcurrent (50/51), negative sequence (46), reverse power (32R), etc.
• Monitoring: Thermal monitoring, mechanical stress monitoring, voltage/frequency ratio monitoring
• Control Functions: Automatic synchronizing, breaker failure protection
• Communication Protocols: IEC 61850 (process bus and station bus), IEC 60870-5-103, Modbus, DNP3
• I/O: Configurable analog inputs, binary inputs and outputs
• HMI: Local LCD display and keypad for data access and configuration
• Mounting: 19-inch rack mount or panel mount
• Operating Temperature: -25°C to +55°C
• Certification: IEC, IEEE, CE, UL, etc.

Advantages and Features

The primary advantage of the ABB REG670 lies in its comprehensive protection functionality and high reliability for any type of generator application. Using the ABB REG670, power plant operators benefit from ABB’s decades of experience in power generation, ensuring critical assets are properly protected. The relay supports IEC 61850 communication, enabling seamless integration into modern digital substations with GOOSE messaging for fast tripping and process bus communication. The modular hardware design of the ABB REG670 allows users to select the exact I/O configuration needed for their application, minimizing cost and complexity. Powerful disturbance recording capabilities capture pre- and post-fault waveforms, providing valuable data for post-incident analysis. Additionally, the ABB REG670 incorporates advanced monitoring functions that assess generator thermal and mechanical stress in real-time, supporting predictive maintenance strategies.

Application Cases in Application Fields

The ABB REG670 is essential across various types of power generation facilities requiring comprehensive generator protection.

• Thermal Power Plants: In a large coal-fired power plant, the ABB REG670 provides complete protection for 600 MW steam turbine generators, including differential protection, loss of field, and out-of-step protection.
• Hydroelectric Power Stations: In a pumped storage plant, the ABB REG670 protects reversible generator-motors, handling the different fault characteristics in both generating and pumping modes.
• Gas Turbine Power Plants: At a peaking gas turbine plant, the ABB REG670 provides fast fault detection essential for frequent start-stop operation.
• Wind Farms: In large offshore wind farms, the ABB REG670 protects main transformers and collectors within the substation.
• Industrial Cogeneration: At a chemical plant’s self-generation facility, the ABB REG670 protects extraction steam turbine generators, integrating with the plant DCS via Modbus.

Comparison with Competing Products

When compared to other generator protection relays such as the Siemens 7UM62 series or the GE G60 generator management relay, the ABB REG670 offers specific advantages for users invested in ABB’s Relion® ecosystem. It provides seamless integration with ABB’s protection and control systems, including common engineering tools and consistent user interfaces. For facilities already using ABB protection equipment, selecting the ABB REG670 ensures compatibility with existing systems and simplifies spare parts management and personnel training. The relay’s proven reliability in extreme environments makes it a preferred choice for many critical generation projects worldwide.

Selection Suggestions and Precautions

When selecting the ABB REG670 for your application, first verify the specific protection functions and I/O configuration required for your generator based on its ratings (capacity, voltage, connection) and grounding method. Use ABB’s CAP software tool to properly configure the ABB REG670 and generate setting files. When installing the relay, ensure correct CT and VT connections, paying particular attention to polarity for proper differential protection operation. Before commissioning, thoroughly test all protection functions using secondary injection testing to verify correct settings. When configuring communication, ensure proper ICD/SCD files if using IEC 61850. Regularly back up the ABB REG670 configuration files and maintain final setting documentation for future maintenance or replacement needs. For critical applications, consider maintaining a spare ABB REG670 relay on hand to minimize downtime in case of failure

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