TheABB RED670 (1MRK002810-AB)is a premier line differential protection relay specifically engineered for the high-speed, selective protection of overhead transmission lines and underground cables. As a key member of theRelion® 670 series, it utilizes a phase-segregated comparison method to detect internal faults with extreme sensitivity.
Technical Specifications
Manufacturer:ABB
Model Number:RED670 (Part: 1MRK002810-AB)
Auxiliary Voltage:Universal support for 48-250V DC/AC (Supports 110V/220V DC standards).
Frequency:50/60 Hz (Dual-frequency compatible).
Operating Temperature:Reliable performance from -40°C to +70°C.
Protection Speed:Optimized for sub-cycle fault detection.
Physical Dimensions:135 x 186 x 119 mm.
Weight:Lightweight 1.2 kg design (compact variant).
Application Scope:High-voltage overhead lines, underground cables, and substation bay protection.
Key Features & Engineering Advantages
Phase-Segregated Protection:By comparing current values for each phase independently, the RED670 achieves superior accuracy during single-phase-to-earth faults and asymmetrical fault conditions.
Multi-Terminal Support:The relay is designed for complex grid topologies, capable of providing secure phase selection and protection for lines with up to five terminals.
Adaptive Charging Current Compensation:On long underground cables, the relay automatically compensates for the natural capacitive charging current, preventing nuisance trips and allowing for more sensitive settings.
Advanced Digital Connectivity:Supports a wide array of communication protocols, including IEC 61850, allowing for seamless integration into modern digital substations and remote SCADA control.
Flexible Logic Configuration:The relay’s internal logic is highly customizable, allowing engineers to tailor the protection scheme to the specific operational requirements of the utility or industrial plant.
