ABB REB670 1MRK002820-AC – Advanced Line Protection Relay for Substation Automatio

If you’re managing high-availability transmission networks or upgrading legacy substations, the ABB REB670 is one of those relays that tends to come up in conversation—and for good reason. It’s not just another IED; it’s a full-featured protection and control unit built around ABB’s Relion® platform, designed to handle complex feeder protection tasks with precision. From my experience working with utility-scale deployments, this model—specifically the 1MRK002820-AC variant—typically shows up in 66 kV to 400 kV applications where reliability under fault conditions is non-negotiable.

Key Features

• Comprehensive protection functions: Includes distance protection (mho, quadrilateral), directional overcurrent, auto-reclosing, synchrocheck, and voltage regulation—ideal for double-ended feeders.
• Digital substation ready: Supports IEC 61850-9-2 process bus communication and GOOSE messaging, which simplifies integration into modern SAS architectures.
• Redundant Ethernet interfaces: Dual 10/100 Mbps ports with RSTP support help maintain network integrity during topology changes or link failures.
• High-resolution measurement: Offers accurate RMS and sequence component monitoring, useful for post-fault analysis and power quality trending.
• Front-accessible USB port: One thing I appreciate is how easy it is to pull logs or update firmware in the field without needing to open the panel.

Technical Specifications

Application Fields

This relay is commonly deployed in high-voltage transmission lines, especially where dual-end coordination and fast fault clearance are critical. You’ll find it used by regional utilities protecting overhead lines across mountainous or remote terrain, where single-phase faults due to lightning strikes are frequent. It also sees use in industrial switchyards feeding large refineries or mines—environments where process continuity depends on selective tripping and quick system restoration via auto-reclose logic. In many cases, engineers choose this model when migrating from older electromechanical systems and need a drop-in replacement with digital diagnostics.

Advantages & Value

Procurement teams often favor the REB670 because of its long lifecycle and backward compatibility with existing ABB engineering tools like PCM600. That means reduced training costs and faster commissioning. The built-in disturbance recorder and COMTRADE export capability can save hours during incident reviews—something maintenance supervisors tend to highlight after an event. While it’s not the cheapest option on the market, its track record for uptime makes it a cost-effective choice over time. Spare inventory pooling across sites is easier too, since configuration files are modular and transferable.

Installation & Maintenance

Mounting should follow IEC 60255 standards for vibration and clearance. Ideally, install in a climate-controlled cabinet with adequate ventilation—especially if operating near the upper temperature limit. Keep fiber-optic connections clean and protected from bending; we’ve seen intermittent issues linked to micro-cracks in patch cables routed too tightly behind panels. For wiring, twisted-shielded pairs are recommended for analog signals, grounded at one end only. On the software side, periodic PCM600 updates ensure access to the latest security patches and feature enhancements. Calibration checks every 3–5 years typically suffice unless exposed to harsh electrical transients.

Quality & Certifications

The unit carries CE, UL 60950-1, and CSA certification, meeting global safety and EMC requirements (including IEC 60255-26 and -27). It complies with RoHS directives, so there are no concerns about restricted materials in environmentally sensitive installations. The firmware includes cybersecurity features such as user role management and audit logging, aligning with IEC 62351 recommendations. Each device comes with a standard 365-day warranty covering defects in materials and workmanship.

Note: Delivery is typically within one week for in-stock units; backorders take no more than a month. Payment terms require 50% upfront, with full balance due before shipment. We ship via FedEx, UPS, or DHL depending on destination and urgency.