The RED670 (part number 1MRK002810-AC) is a high-performance Intelligent Electronic Device (IED) from ABB’s Relion® 670 series, specifically engineered for line differential protection. It provides robust, selective, and high-speed protection for transmission and sub-transmission lines. By utilizing advanced algorithms, the RED670 can detect and clear faults with exceptional precision, even in complex grid topologies, ensuring the stability and safety of the power network.
Product Specifications
| Feature | Details |
| Model Number | RED670 |
| Part Number | 1MRK002810-AC |
| Device Type | Line Differential Protection IED |
| System Series | Relion® 670 |
| Primary Function | Current differential protection, distance protection, and teleprotection |
| Connectivity | IEC 61850-8-1, Modbus, DNP3, IEC 60870-5-103 |
| Weight | Approximately 5.5 kg – 9.0 kg |
| Country of Origin | Sweden |
Application Fields
The RED670 is a cornerstone for high-voltage line protection:
- Line Differential Protection: Protecting lines of varying lengths and characteristics with high sensitivity.
- Transmission Grids: Safeguarding key power corridors against phase and ground faults.
- Digital Substations: Supporting advanced communication protocols like IEC 61850 for seamless integration into smart grids.
- Complex Network Topology: Providing reliable operation even in multi-terminal line applications.
Product Usage Instructions
- Mounting: The unit is designed for standard 19-inch rack mounting. Ensure adequate space for ventilation and wiring access.
- Wiring: Carefully follow the connection diagram associated with the 1MRK002810-AC configuration. Pay special attention to the polarity of the CT (Current Transformer) circuits, as correct phasing is critical for differential protection.
- Communication Setup: Configure the fiber-optic communication channels between terminal ends using the PCM600 software. This is vital for accurate current vector comparison.
- Configuration & Logic: Utilize the PCM600 tool to define protection zones, relay characteristics, and interlocking schemes.
- Testing: Perform a differential current test during commissioning to ensure the relay correctly accounts for line charging currents and CT errors.
Frequently Asked Questions
Q: What does the “1MRK002810-AC” code represent?
A: This code defines the specific hardware and pre-configured software functional blocks for your RED670. It dictates the number of analog inputs, communication hardware, and specialized protection features included in the factory build.
Q: How does the RED670 maintain stability during power swings?
A: The device utilizes advanced bias current algorithms and fault-detection logic that can distinguish between internal line faults and external disturbances like power swings or system oscillations.
Q: Can this relay be used on underground cable lines?
A: Yes. Because differential protection is not hindered by the high capacitive charging currents inherent in long underground cables, the RED670 is an excellent choice for cable, overhead line, or hybrid circuits.
Q: How do I troubleshoot communication loss between relay ends?
A: Check the status of the fiber-optic link via the PCM600 tool or the front-panel HMI. A communication failure alarm usually indicates a broken fiber path, an issue with the optical transceiver, or a synchronization error between the two ends of the line.
