ABB RED670 1MRK004810-CB Line Differential Protection IED

Product Overview

The ABB RED670 A32 (1MRK004810-CB) is a specialized Intelligent Electronic Device (IED) designed for high-speed line differential protection in transmission networks. Optimized for Single Breaker configurations with 1-Phase Tripping capability, it ensures maximum grid stability by clearing faults on individual phases without disconnecting the entire line. 

Technical Specifications

• Product ID: 1MRK004810-CB.

• Global Commercial Alias: RED670 A32.

• Version: 1.1.

• Function: Line Differential Protection.

• Breaker Configuration: Single Breaker (1CB).

• Tripping Mode: Single-Phase (1Ph) Tripping.

• Communication: IEC 61850 compliant.

• Protection Logic: Phase-segregated line differential and backup distance protection.

Key Features and Engineering Advantages

• Phase-Segregated Differential Protection: Measures current at both ends of the line for each phase independently. This allows for extremely high sensitivity and the ability to detect high-resistance faults.

• Single-Phase Tripping Capability: In the event of a single-phase-to-ground fault, the RED670 can trip only the affected phase. This maintains partial power flow and improves system stability during transient faults.

• High-Speed Communication: Utilizes fiber-optic communication channels to exchange current vector data between local and remote terminals in real-time.

• Comprehensive Backup Logic: Includes integrated distance protection and overcurrent functions to ensure the line remains protected even if the communication channel is lost.

• IEC 61850 Integration: Supports high-speed GOOSE messaging for interlocking and station-wide communication, facilitating the transition to fully digital substations.

• Sequence of Events (SOE) Recording: Captures millisecond-accurate data during disturbances, providing essential information for post-fault analysis and grid reliability improvements.