ABB REB670 en-US IEC User Documentation 1.0.3

ABB Technology Ltd. presents the REB670, an advanced numerical transformer protection and control relay designed for power utility applications. This relay provides a comprehensive range of protection, control, monitoring, and communication features to improve reliability and efficiency of power grids.

Key Features

• Extensive protection functions include differential protection, earth fault protection, overcurrent protection, and more.
• Advanced communication interfaces including IEC 61850 protocol for seamless integration with existing power systems.
• Highly customizable settings allow for tailored operation to meet specific application requirements.
• User-friendly interface and tools make configuration and monitoring of the relay easy and efficient.
• Detailed event and fault recording allows for accurate analysis and troubleshooting.

Applications

The REB670 is suitable for various applications in power transmission, distribution, and generation. It can be used for various transformers including two-winding, three-winding, autotransformers, reactors, etc. Some typical applications include:

• Transformer protection with multiple functions (REF, DIR+, DIR-, SEF).
• Transformer differential protection using percentage or harmonic-restraint methods.
• Busbar protection for different types of bus configurations.
• Generator protection using voltage controlled overexcitation protection (24/27) or field ground fault protection (64G).
• Transmission line protection with distance or overcurrent principles.

In summary, the REB670 provides advanced transformer protection and control features suitable for various power system applications. It is a reliable solution for improving power grid performance and ensuring safe and stable power supply.