ABB RED670 1MRK002246-BC Relion Line Differential Relay

Technical Overview

The ABB RED670 (1MRK002246-BC) is a high-performance Intelligent Electronic Device (IED) specifically engineered for the phase-segregated protection, control, and monitoring of overhead lines and underground cables. As a premier component of the Relion® 670 series, it is optimized for high-voltage (HV) and extra-high-voltage (EHV) transmission networks. 

Detailed Technical Specifications

The RED670 1MRK002246-BC is designed to meet the following industrial-grade benchmarks:

• Primary Function: Phase-segregated line differential protection.

• Network Compatibility: Rated for systems up to 765 kV.

• Current Capacity: Rated for primary currents up to 5,000 A.

• Measurement Precision: Industry-leading 0.2% protection accuracy.

• Communication Standards: Full compliance with IEC 61850-8-1, including high-speed GOOSE and client-server MMS protocols.

• Operating Temperature: Wide-range performance from -40 °C to +70 °C.

• Physical Profile: 230 mm x 160 mm x 100 mm.

• Weight: 3.5 kg.

• Environmental Tolerance: Operating humidity from 5% to 95% RH (non-condensing).

Advanced Features and Grid Protection

The 1MRK002246-BC variant delivers high-speed tripping logic, which is critical in EHV applications to maintain power system synchronism and minimize damage to expensive primary equipment. The module is versatile enough to support various system earthing methods—including isolated, compensated, or directly earthed networks. Its robust hardware design is purposefully built to endure the extreme electromagnetic interference (EMI) and mechanical stresses typical of high-voltage substation environments. Furthermore, it supports integrated bay control functionality, allowing for the centralized management of circuit breakers and disconnectors within a single, secure device.