RED670 1MRK002810-AB | ABB Line Differential Protection Relay

Product Description

The RED670 (1MRK002810-AB) is a high-performance line differential protection relay from ABB’s Relion® 670 product family. It provides ultra-fast, selective, and secure protection for overhead lines and underground cables in transmission and sub-transmission networks—especially in multi-terminal or meshed configurations where traditional overcurrent schemes are insufficient.

Using time-synchronized current measurements from both ends of a protected line via IEC 61850-9-2 LE (sampled values) or legacy fiber-optic links, the RED670 detects internal faults within milliseconds while remaining stable during external disturbances, CT saturation, or inrush conditions.

Technical Specifications  

• Manufacturer: ABB

• Model / Part Number: RED670 (1MRK002810-AB)

• Product Series: Relion® 670

• Primary Function: Line current differential protection

• Standards Compliance: IEC 61850 Edition 2, IEEE C37.94, IEC 60255

• Communication Interfaces:

• Dual 100 Mbps Ethernet (IEC 61850-9-2 LE, GOOSE, MMS)

• Optional fiber-optic serial link (for legacy differential schemes)

• IRIG-B, PTP (IEEE 1588), or SNTP for precise time sync

• Sampling Rate: Up to 4 kHz per channel

• Operating Voltage: 24–250 VDC or 100–240 VAC (universal auxiliary supply)

• Application Range: Up to 400 kV systems

• Mounting: 19" rack, 6U height

• Origin: Designed and manufactured in Europe (typically Sweden or Finland)

Typical Applications  

• Protection of critical transmission feeders between substations

• Cable circuits in urban distribution networks

• Tie-lines in industrial power systems requiring high-speed tripping

FAQ
Q: Does it require GPS at both line ends?
A: Not necessarily—time synchronization can be achieved via PTP over IEC 61850 networks or IRIG-B from a local master clock. GPS is one option but not mandatory.

Q: How does it differ from the REL670?
A: The REL670 is a general-purpose line distance/overcurrent relay; the RED670 specializes exclusively in current differential protection with advanced stabilization algorithms.

Q: Can it work with non-ABB relays at the remote end?
A: Yes—if the remote device supports interoperable sampled values (IEC 61850-9-2 LE) or compatible differential protocols (e.g., IEEE C37.94 over fiber).