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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Model | REC670 1MRK004814-AG |
| Product Type | Numerical Protection Relay / Substation IED |
| Protection Functions | Line differential (87L) |
| Communication Protocols | IEC 61850 (GOOSE/MMS), DNP3, Modbus, IEC 60870-5 |
| Power Supply | 48–250 V DC or 88–300 V AC |
| Current Inputs | 1 A or 5 A configurable |
| Sampling Rate | 80 samples per cycle (~4.8 kHz) |
| I/O Capacity | Approx. 24 binary inputs |
| Operating Temperature | −40 to +70 °C |
| Enclosure Rating | IP52 standard (IP65 optional) |
| Typical Applications | Transmission lines, substations, power plants |
| Lifecycle Status | Mature protection platform; lifecycle planning recommended |
These relays integrate protection, control, monitoring, and communication in a single substation automation device used for high-voltage grid protection and control.
4. Product Introduction & Supply Chain Strategy
The ABB REC670 1MRK004814-AG is a numerical protection relay from the Relion 670 series used for transmission line protection, bay control, and substation automation. It combines differential protection, distance protection, measurement, disturbance recording, and IEC 61850 communication within a single intelligent electronic device deployed in power plants and transmission substations.
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. Maintaining a small buffer stock (1–2 units) is a standard reliability strategy because utility-grade protection relays often face lead time variability exceeding 20–30 weeks once production slows. Holding verified New Surplus inventory avoids emergency purchases and protects grid reliability while lowering long-term Total Cost of Ownership (TCO).
5. Installation & Configuration Guide
Stage 1 — Pre-Installation (Prep & Safety)
- Apply lock-out/tag-out (LOTO) to the protection panel supply.
- Wear a grounded ESD wrist strap before touching the relay electronics.
- Export the current relay configuration from the engineering software (PCM600 or equivalent).
- Photograph terminal wiring, CT/VT connections, and communication ports.
Stage 2 — Removal
- Isolate auxiliary power and fiber/Ethernet communication lines.
- Remove front mounting screws securing the relay in the panel cutout.
- Carefully slide the relay forward to avoid stressing terminal blocks and fiber connectors.
Stage 3 — Installation (Clone & Seat)
- Insert the new relay into the panel mount frame.
- Reconnect CT, VT, binary I/O, and Ethernet connections exactly as documented.
- Restore configuration using the exported engineering file.
- Verify I/O mapping and protection settings.
Stage 4 — Power-On & Testing
- Energize the auxiliary supply.
- Confirm front-panel LEDs show RUN / READY state without protection alarms.
- Check communication with the SCADA or substation automation system.
- Perform secondary injection testing to verify protection elements.
6. Firmware/Software Versions & Upgrade Notes
- Recommended configuration environment: ABB PCM600 engineering software.
- Firmware revisions must align with the existing IEC 61850 system configuration file (SCL).
- Jumping between firmware branches can affect GOOSE messaging and protection logic mapping.
- When replacing hardware, the safest method is to clone the original firmware version and configuration from the previous relay.
- Upgrading firmware during a field replacement should occur only during a scheduled maintenance outage because protection schemes may require revalidation testing.
- REC670 1MRK004814-AG
7. Frequently Asked Questions (FAQ)
Q1: Are these relays truly new if they are called surplus?
Yes. New Surplus means the relay was produced by ABB and stored in supply channels but never installed. The device shows no connector wear, no repairs, and retains OEM manufacturing integrity.
Q2: Why is the price lower than ordering directly from ABB?
OEM procurement includes manufacturing scheduling and distributor margins. Surplus units already exist in the supply chain, allowing pricing typically 20–30% below OEM list while remaining completely new.
Q3: Is the REC670 platform approaching end-of-life?
The Relion 670 family remains widely deployed, but utilities are gradually introducing newer protection platforms. Plants operating these relays should maintain buffer stock or execute a last-time-buy strategy.
Q4: Can this relay be replaced without reprogramming protection settings?
Yes, if you upload the existing configuration file from the previous unit. Protection logic, communication mapping, and disturbance recording parameters will transfer directly.
Q5: Can it be replaced while the panel remains energized?
No. Protection relays should not be hot-swapped in energized protection panels. Removing power ensures CT circuits and protection logic remain stable during replacement.
Q6: What warranty coverage is included?
Each relay includes a 12month warranty, serialized traceability, and documented QC inspection verifying communication ports, power supply rails, and functional diagnostics.
