Description
Product Introduction
In field deployments on transmission lines, the ABB RED670 1MRK002810-AB delivers reliable phase-segregated differential protection. This IED handles overhead lines and cables in complex multi-terminal setups, providing fast fault clearance even on high-resistance faults.
The unit stands out in applications needing secure operation across up to five line terminals. It offers typical operate times under 30 ms for internal faults while maintaining stability during external faults or power swings. Always verify the exact configuration and firmware against your system requirements before installation.
Key Selling Points & Differentiators
- Supports high-sensitivity differential protection with excellent resistive fault coverage, delivering secure phase selection in multi-terminal lines.
- Full live functional testing on Relion 670 test racks including comms handshake and >24-hour load run; test report and photos provided on request.
- Unlike basic overcurrent relays, this provides true current differential (87L) that remains stable during CT saturation events common in long lines.
- Not recommended for simple distribution feeders under 33 kV where a lighter 650 series unit would suffice and cost less.
- Tested per IEC 61850 and relevant protection standards; insulation resistance checked >10 MΩ where applicable.
- Passed incoming serial verification, visual inspection, and final QC sign-off with ESD-safe packaging.
Old-Hand Technical Pitfall Guide
Firmware revision mismatch remains the top cause of post-install headaches. The RED670 may refuse to energize or throw configuration errors if the loaded application does not match the existing bay logic. Always record the current firmware and configuration file name before removal and request matching version from the supplier. If mismatch occurs, use PCM600 to reconfigure — but test offline first.
❗ DIP switch / jumper misconfiguration can lock the unit out of service. Take clear photos of all settings and bus termination before swap. Incorrect termination on the communication fiber or inter-IED links often causes differential blocking.
Terminal block variations across hardware revisions create silent wiring errors. Check the exact connector type and pinout on the wiring diagram — do not wire by memory from an older RED670 unit.
Power budget differences matter in fully loaded racks. Keep at least 20% headroom; a typical fully optioned RED670 draws 20–35 W depending on modules. Overloading the DC supply leads to unexpected resets during fault events.
ESD handling is critical during replacement. One technician lost a board in dry winter conditions by skipping the wrist strap — simple but expensive. Use mat and strap every time.
Remember these and you’ll avoid most rework.
