The ABB REL670 (1MRK004812-DC) is a high-performance Intelligent Electronic Device (IED) specifically designed for the protection, control, and monitoring of overhead lines and cables. Part of the Relion 670 series, this model provides sub-cycle distance protection and supports complex grid configurations, ensuring rapid fault clearance and maximum system stability.
Technical Specifications
| Feature | Details |
| Model Number | REL670 / 1MRK004812-DC |
| Main Function | Full-scheme Distance Protection (21) |
| Series | Relion 670 Series |
| Communication | IEC 61850-8-1, IEC 61850-9-2 LE, DNP3, IEC 60870-5-103 |
| Country of Origin | Sweden |
| Dimensions (WxHxD) | 448 x 266 x 249 mm (Standard 6U Rack) |
| Weight | Approx. 8.2 kg (Base Configuration) |
| Power Supply | 24-60V DC or 90-250V DC |
Operational Precautions
- CT/VT Circuit Integrity: Ensure Current Transformer (CT) circuits are never opened while primary power is active; use dedicated test switches for isolation.
- Redundancy Configuration: When utilizing PRP or HSR communication redundancy, verify that both fiber optic ports are securely connected to compatible switches.
- Firmware Lifecycle: Before replacing the 1MRK004812-DC, ensure the version matches the existing station configuration files in the PCM600 software.
- Earthing Requirements: The IED casing must be connected to the station ground bar using a short, low-impedance conductor to prevent EMI interference.
Common Q&A
Q: Does this model support multi-breaker (1-1/2 breaker) arrangements? A: Yes, the REL670 is natively designed to handle complex bay topologies including multi-breaker and double-breaker systems with integrated synchrocheck.
Q: Can it provide protection for both compensated and uncompensated lines? A: Yes, the distance protection algorithm includes compensation for mutual induction and series-compensated transmission lines.
Q: Is there an integrated fault recorder? A: The REL670 includes a high-resolution disturbance recorder capable of capturing both analog waveforms and binary events for post-fault analysis.
Recommended Similar Models
- RED670: Specialized line differential protection IED for high-speed unit protection.
- REC670: A dedicated bay control IED often paired with the REL670 in transmission substations.
- RET670: High-performance transformer protection for the same hardware platform.
- REB670: Ultra-fast busbar protection IED compatible with 670 series communication.
- REL650: A compact, standardized version of distance protection for less complex applications.
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