The ABB RED670 (1MRK002810-AC) is a high-performance Intelligent Electronic Device (IED) specifically engineered for the protection, control, and monitoring of overhead lines and cables. As a key component of the Relion 670 series, this model provides phase-segregated line differential protection, making it ideal for complex power grids where high-speed fault clearance and sensitivity are required.

 

Technical Specifications

 

Operational Precautions

• Fiber Communication Link: For differential protection to function, the dedicated communication link between the local and remote IEDs must be synchronized. Ensure the fiber optic cables meet the C37.94 standard and are free of excessive signal attenuation.
• CT Saturation: Verify that the Current Transformer (CT) requirements are met for high-speed differential protection; internal algorithms provide saturation detection, but proper CT sizing is critical for stability during external faults.
• Redundancy Management: If using PRP (Parallel Redundancy Protocol), ensure both LAN ports are connected to independent network switches to maintain zero-recovery-time communication.
• Configuration Locking: Use the PCM600 tool to lock the protection parameters once commissioning is complete to prevent accidental logic changes via the local HMI.

Common Q&A

Q: What is the benefit of “phase-segregated” differential protection? A: It allows the relay to measure the current in each phase independently at both ends of the line, providing superior sensitivity for evolving faults and single-phase tripping/reclosing capabilities.

Q: Can it be used on lines with a transformer “in-zone”? A: Yes, the RED670 includes sophisticated algorithms to compensate for the transformation ratio and phase shift of in-zone power transformers.

Q: Does it support synchro-check functions? A: Yes, the 1MRK002810-AC variant typically includes integrated synchro-check and energizing check (25) for safe manual or automatic reclosing of the circuit breaker.

 

Recommended Similar Models

1. REL670: The companion distance protection IED, often used as back-up for the RED670.
2. REC670: A dedicated bay control IED for managing breaker and isolator positions.
3. RED650: A standardized, less complex version of line differential protection for distribution levels.
4. 1MRK004812-DC: A related Relion 670 hardware variant with alternative I/O mapping.
5. CI854A: PROFIBUS communication interface for integration into ABB’s 800xA system architecture.