1. Product Overview
The ABB RED670 is a high-performance numerical line differential protection relay belonging to ABB Relion® 670 series protection and control product family. As a core protection device for medium and high-voltage transmission lines, it provides full-scope differential protection, fault location, measurement and control functions for overhead lines and underground cables, and is widely deployed in 110 kV – 765 kV power transmission grids, large industrial power plants and renewable energy collection station grid connection points.
2. Core Technical Specifications
- Manufacturer: ABB
- Product Type: Numerical Line Differential Protection Relay
- Supported Voltage Levels: 110 kV to 765 kV transmission lines
- Protection Functions: Line current differential, distance protection, overcurrent protection, earth fault protection, auto-reclosing, fault recording
- Differential Protection Operating Time: ≤ 15 ms
- Fault Location Accuracy: ≤ ±2% of line length
- Communication Interfaces: 2 × 10/100 Mbps Ethernet ports, IEC 61850, IEC 60870-5-103, Modbus protocols supported
- Power Supply: 85–265 V AC / 88–300 V DC wide range input
- Operating Temperature Range: -25 °C to +70 °C
- Certifications: IEC 61850 Edition 2 certified, IEC 61508 SIL 2 functional safety compliance
- Mounting Form: Standard 19-inch panel / rack mounting
- Net Weight: ~3.5 kg
- Warranty: 12 months standard for new units
3. Key Features & Advantages
- Ultra-Fast Differential Protection Response: The ≤15 ms operating time can quickly isolate line faults, drastically reducing the impact of short-circuit faults on the power grid and improving the transient stability of the power system.
- High-Precision Fault Location: The ±2% fault location accuracy helps operation and maintenance teams quickly pinpoint the fault point on the transmission line, drastically shortening the line troubleshooting and recovery time.
- IEC 61850 Edition 2 Native Support: It fully complies with the latest IEC 61850 communication standard, supports seamless interconnection with modern digital substation systems, and realizes efficient information sharing between protection devices and the substation monitoring platform.
- Strong Anti-Interference Performance: The industrial-grade EMC design and -25 °C to +70 °C ultra-wide operating temperature range ensure long-term stable operation in harsh outdoor substation environments.
- Rich Built-In Protection Logic: It integrates all required protection, measurement, control and fault recording functions for transmission lines in a single device, eliminating the need for multiple separate protection devices and drastically reducing substation hardware investment.
4. Typical Industrial Applications
This protection relay is a mission-critical spare part for facilities operating ABB Relion 670 series protection systems, delivering tangible power grid reliability benefits.
- In large 220 kV / 500 kV main transmission line protection scenarios, it provides high-speed and reliable differential protection for the line, effectively preventing large-scale power grid accidents caused by line short-circuit faults.
- In new energy wind farm and photovoltaic station grid connection points, it quickly isolates grid faults on the transmission line side, ensuring that the new energy power generation units will not be affected by external faults and maintaining stable grid-connected operation.
- For operation and maintenance teams managing existing ABB RED670 protection devices, the module is fully backward compatible with the original substation protection system, no complex modification work is required after replacement, allowing users to restore the full protection function of the transmission line at a very low hardware investment.
- In large industrial enterprise self-owned power plant transmission outgoing line scenarios, the relay ensures the reliable operation of the enterprise’s self-provided power grid, avoiding production shutdown losses caused by power grid faults.
