RED670 Line differential protection equipment
RED670 is a line differential protection device produced by ABB.
It is suitable for various voltage levels of power systems, mainly used to protect, control and monitor overhead lines and cables. The RED670 is versatile and flexible to meet the requirements of a wide range of applications. It uses split-phase differential dynamic protection technology, which is highly sensitive to high-resistance faults and provides safe phase selection for up to five line terminals. In addition, the RED670 can also include two or three winding power transformers in the protection range.
The main functions and features of RED670 include:
Line differential protection: The split line differential protection in RED670 can reliably achieve single-phase/two-phase/three-phase trip and automatic reclosing, with synchronization and simultaneous inspection functions.
Back-up distance protection: When the communication channel is interrupted, distance protection can be used as an optional back-up protection.
Current protection: The RED670 is equipped with current protection to effectively detect fault currents in the line.
Voltage protection: The RED670 also has voltage protection to monitor voltage changes on the line.
Power system Monitoring: RED670 can also monitor the power system, including secondary system monitoring and frequency protection functions.
The use of RED670 improves the reliability of power systems and provides integrated protection, control and monitoring solutions.
RED670 is a line differential protection device produced by ABB, and its design and application reasons are mainly based on the following points:
The need for power system protection: In a power system, the protection of lines and equipment is critical. RED670, as a line differential protection device, can provide reliable protection functions to ensure the stable operation of the power system. It uses advanced differential protection technology, which can accurately distinguish line faults and external faults, so as to quickly remove faults and reduce the impact of faults on the system.
Improved protection performance: RED670 has a variety of protection functions, such as line differential protection, backup distance protection, current protection and voltage protection. These functions can ensure that in the event of various failures in the power system, RED670 can respond in time and take appropriate protective measures. At the same time, RED670 also has the power system monitoring function, which can monitor the operating status of the power system in real time, and discover and deal with potential security risks in time.
Flexibility and customizability: The RED670 is highly flexible and customizable. Users can set parameters and configure logic based on actual requirements to meet the protection requirements of different power systems. In addition, RED670 also supports a variety of communication protocols, making it easy to exchange data and communicate with other smart devices.
Improve the reliability of the system: RED670 uses advanced technology and high-quality components, with a high degree of reliability and stability. It can operate stably in harsh environment for a long time, providing a strong guarantee for the safety of the power system. At the same time, RED670 also has fault diagnosis and event recording functions, which can detect and handle potential security risks in a timely manner to improve system reliability.
In summary, RED670, as a line differential protection equipment produced by ABB, is designed and applied mainly to meet the needs of power system protection and improve protection performance, flexibility and reliability. 
