ABB RED670 1MRK004810-CC Line Differential Protection IED

Technical Overview

The ABB RED670 (1MRK004810-CC) is a flagship Intelligent Electronic Device (IED) within the Relion® 670 series, engineered for the phase-segregated protection, control, and monitoring of high-voltage overhead lines and underground cables. 

Detailed Technical Specifications

The ABB 1MRK004810-CC is built to the following industrial-grade performance benchmarks:

• Primary Function: Phase-segregated line differential protection for HV and EHV lines.

• Rated System Voltage: Supports transmission networks up to 765 kV.

• Rated Current: Handles primary current capacities up to 5,000 A.

• Measurement Accuracy: High-fidelity 0.2% protection accuracy for current and voltage.

• Communication Interface: Full compliance with IEC 61850-8-1, including GOOSE messaging and MMS protocols.

• Operating Temperature: Extreme environmental range of -40 °C to +70 °C.

• Environmental Range: 5% to 95% RH (non-condensing); IP-rated for indoor/cabinet use.

• Physical Profile: Compact dimensions of 230 mm x 160 mm x 100 mm.

• Weight: 3.5 kg.

• Tripping Logic: Ultra-high-speed execution for rapid fault clearance.

Advanced Protection and Substation Control

The RED670 1MRK002810-CC integrates versatile protection logic suitable for various system earthing methods, including isolated, compensated, or directly earthed networks. Beyond its core differential element, it serves as a comprehensive bay controller, managing circuit breakers and disconnectors with advanced interlocking logic. Its robust design is specifically hardened against the high electromagnetic interference (EMI) levels found in extra-high-voltage substations. The support for IEC 61850 GOOSE messaging enables fast horizontal communication with other IEDs, facilitating sophisticated protection schemes like busbar blocking without traditional hardwiring.