Product Core Brief
- Model: REC670 1MRK004814-AG
- Brand: ABB
- Series: REC670 (Relion 670 series)
- Core Function: Provides feeder and distribution protection, control, and monitoring as a numerical protection IED in a Relion 670 panel.
- Product Type: Numerical protection relay / IED
- Key Specs: Relion 670 hardware platform | Order number 1MRK004814-AG | Panel or flush-mount installation
- Condition: New Original / New Surplus (condition stated per line item on quotation)
Transparency note: The 1MRK order number identifies the hardware article and revision; the protection function set is defined by the license and configuration, not the order number alone. Confirm both from the nameplate of the unit being replaced.
Key Technical Specifications
| Category | Parameter | Value |
|---|---|---|
| Identification | Full Model | REC670, order number 1MRK004814-AG |
| Identification | Platform | ABB Relion 670 series |
| Function | Device Type | Numerical protection / control IED |
| Function | Typical Application | Feeder and distribution protection, control, monitoring |
| Compatibility | Replacement Rule | Order number, revision, and license set must match the original |
| Mounting | Installation | 19″ panel or flush-mount cutout per OEM drawing |
| Electrical | Supply | Auxiliary voltage per Relion 670 specification |
| Communication | Interfaces | IEC 61850 process/station bus; serial and Ethernet ports per variant |
| Maintenance | Hot Swap | Not a hot-swap article — protection function must be blocked before removal |
| Configuration | Firmware | Rev-dependent; verify against the engineering tool project file |
| Environment | Operating Condition | Substation or control room enclosure; temperature limits apply |
| Supply | Lead Time | In-stock articles ship within 48 hours |
Product Introduction
The REC670 1MRK004814-AG is an ABB Relion 670 protection IED used in feeder and distribution protection schemes. It executes protection functions, controls breakers, and reports to the station bus.
Two things cause most replacement failures: a firmware revision mismatch against the engineering project file, and a missing function license. The order number alone does not guarantee the replacement will behave like the original.
QA & Testing SOP
Same sequence for new original and surplus.
- Inbound verification. Order number, revision, serial number, and license labels photographed and matched against the customer’s Relion project documentation. Mismatched revisions are quarantined.
- Physical inspection. Rear connector, pins, and housing examined under magnification for rework, oxidation, or bent-pin damage.
- Auxiliary power-up. Powered through a current-limited supply; startup sequence, display, and self-diagnostics logged.
- Functional exercise. Secondary injection on the analog inputs with a calibrated test set; trip thresholds and output contacts verified against the OEM settings file. Event and communication logs captured.
- Anti-static packaging. Moisture-barrier bag, desiccant, ESD label. Signed test record packed with the unit.
Installation Pitfalls & Guide
❗ Blocking before removal. Pulling a protection IED from a live scheme without blocking the associated trip outputs risks an unwanted breaker operation. Follow the OEM blocking procedure first.
❗ Firmware and license mismatch. A replacement with a different firmware revision or missing license will power up and communicate, then fail during a fault. Verify both against the project file before commissioning.
❗ CT/PT polarity and burden. Reversing a current transformer polarity during rewire produces a relay that passes self-test and misoperates on a real fault. Check polarity and burden with a secondary injection test.
❗ Ground loops on analog inputs. Mixing substation ground and panel ground on the analog return path creates erratic measurements that look like relay failure.
Replacement sequence:
- Pre-install — Confirm safe grid state, block protection function, apply lockout/tagout, photograph nameplate and rear wiring.
- Removal — De-energize auxiliary supply, release mounting hardware, extract without stressing the rear connector.
- Install — Mount to panel, torque fasteners to OEM specification, reconnect wiring against the photographed reference.
- Power-on test — Verify startup and communication, download the correct settings and license, run secondary injection and a trip test, then unblock the function.
Technical FAQ
Can I substitute a different 1MRK revision if the exact one is unavailable? Only after checking the Relion project file. Revision differences can change firmware behavior or license compatibility, and a mismatch may pass self-test yet misoperate on a real fault.
Is this relay hot-swappable? No. It is a protection device with direct trip outputs. Block the function and de-energize the auxiliary supply before removal.
Why does the replacement relay alarm after install? Most often it is not the relay. Check rear connector seating, firmware revision, license status, CT/PT polarity, and the station bus configuration.
What warranty applies? New original relays carry standard coverage as stated on the quotation. Surplus units carry a shorter, disclosed term confirmed before payment.
Is the REC670 still supported by ABB? The Relion 670 platform remains in the portfolio, but individual order numbers move toward channel inventory over time. That makes revision, license, and lead-time confirmation more decisive than unit price on this part.
