The ABB RED670 (part number 1MRK004810-AC) is a premier line differential protection IED within the Relion 670 series. It provides high-speed, phase-segregated differential protection for overhead lines and cables, offering robust stability against external faults and high sensitivity for internal faults in complex transmission networks.
Technical Functionality
The RED670 utilizes a patented differential algorithm that compensates for charging currents in long cables and high-voltage lines. It supports multi-terminal applications (up to five line ends) and integrates full distance protection as a backup, ensuring comprehensive coverage and seamless communication via the IEC 61850 protocol.
Key Specifications
| Parameter | Specification |
| Model | RED670 |
| Ordering Code | 1MRK004810-AC |
| Main Protection | Phase-segregated line differential (87L) |
| Backup Protection | Full 5-zone distance protection (21) |
| Communication | IEC 61850-8-1 (GOOSE/MMS), PRP/HSR Redundancy |
| Terminal Ends | Supports 2 to 5 terminal configurations |
Operational Precautions
- Communication Latency: Ensure the dedicated fiber optic or communication link meets the specified jitter and delay requirements to maintain differential synchronization.
- CT Supervision: The relay must be configured with CT (Current Transformer) supervision to prevent accidental tripping in the event of a secondary circuit failure.
- Firmware Consistency: When used in multi-terminal schemes, all IEDs at different line ends should ideally run the same firmware version to ensure algorithmic compatibility.
Common Questions Q&A
Q: Can the RED670 protect lines with an integrated power transformer? A: Yes, the RED670 includes specialized transformer differential features to compensate for vector group shifts and CT ratio mismatches within the protected zone.
Q: Does it support single-phase tripping? A: Absolutely. The RED670 is designed for independent phase-segregated evaluation, allowing for single-pole tripping and auto-reclosing to maximize system stability.
Recommended Similar Models
- REL670: A dedicated distance protection IED for applications where differential protection is not required.
- REC670: A bay control IED often used in tandem with the RED670 for comprehensive breaker management.
- RET670: Optimized specifically for high-capacity power transformer protection.
- REB670: A high-speed busbar protection IED for substation safety.
- REG670: A specialized generator protection IED for large power plant units.
Detailed technical data and current stock for the ABB 1MRK004810-AC are available through our current protection and control inventory.
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