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Phone: +86 16626708626Description
2. Product Core Brief
- Model: 1MRK004816-AB (RET670 ver. 1.1)
- Brand: ABB (Hitachi Energy)
- Series: Relion 670
- Core Function: Protects, monitors, and controls power transformers (differential, REF, overcurrent, thermal)
- Product Type: Transformer Protection IED
- Key Specs: Two-winding single-breaker config, high-impedance differential support, Ethernet/IEC 61850 comms, binary I/O expandable, PCM600 configurable
- Condition: New Surplus / New Original (mature/obsolete variant, limited spares available)
3. Key Technical Specifications
- IED Type: RET670 Transformer Protection (pre-configured for 2-winding, single-breaker)
- Protection Functions: Transformer differential (87T), restricted earth fault (87N), overcurrent (50/51), thermal overload (49), overexcitation (24), etc.
- Inputs/Outputs: Configurable binary/optical inputs, relay outputs (high-speed tripping), analog channels for CT/VT
- Communication: IEC 61850-8-1 (Ethernet), DNP3, Modbus, IEC 60870-5-103; optional redundant PRP/HSR
- Power Supply: 24–60 VDC or 100–250 VDC/AC (variant-dependent)
- Accuracy: High-precision differential (typically <1% for current)
- Operating Temperature: –25 to +70 °C (extended range)
- Mounting: 19-inch rack or panel (half 19″ or full depending on config)
- Configuration Tool: PCM600 (Protection and Control IED Manager)
- Status: Mature/obsolete by manufacturer – spares only
- 1MRK004816-AB
4. Product Introduction
The ABB 1MRK004816-AB is a Relion RET670 IED dedicated to transformer protection. It mounts in substation racks and delivers fast, selective protection for two-winding transformers with single-breaker arrangements, including differential, restricted earth fault, and backup overcurrent functions in utility and industrial power systems.
This pre-configured unit simplifies setup for standard applications while supporting advanced features like adaptive differential for phase-shifting transformers and integrated monitoring. Substation engineers rely on it for reliable operation in legacy 670 series installations—direct replacements preserve settings, CT/VT wiring, and IEC 61850 mappings without full reconfiguration or system migration.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No power-up (no LEDs) | Supply missing or fuse blown | ✅ High | Measure PSU terminals (24–250 V range) | Verify input voltage; check fuses |
| Differential not picking up | CT polarity wrong or ratio mismatch | ✅ High | Check CT wiring; view harmonic/blocking in PCM600 | Correct polarity; verify settings |
| Trip output no activation | Logic not enabled or contact fault | ✅ High | Force binary output in PCM600; measure contacts | Test relay card; confirm trip circuit |
| Communication lost (IEC 61850) | Network cable/IP conflict | ✅ High | Ping IED IP; check front HMI network status | Verify Ethernet cable; reconfigure IP |
| REF or overcurrent false trip | Harmonic restraint fail or setting error | ✅ Medium | Review event recorder; check 2nd harmonic | Adjust restraint; analyze waveforms |
| IED fault LED on | Internal self-test fail | ✅ High | Read disturbance/fault records in PCM600 | Download records; likely hardware issue |
| Overheating or fan alarm | Blocked vents or high ambient | ❌ Low | Check enclosure temp; clean filters | Improve cooling; monitor environment |
RET670 issues typically trace to CT/VT wiring, settings mismatches, comms config, or external faults—not IED hardware failing outright. Always pull event/disturbance records via PCM600 first. Capture HMI screenshots, LED states, and fault logs—send them if needed; we can spot common config traps quickly.
6. Frequently Asked Questions (FAQ)
What application is the 1MRK004816-AB suited for? It’s pre-configured RET670 for two-winding transformer protection with single-breaker setup. Handles differential, REF, backup overcurrent, and more—ideal for substation transformers, autotransformers, or generator-step-up units.
Is this IED still manufactured new by Hitachi Energy? No, Relion 670 series variants like this are mature/obsolete. We source new surplus—unused, sealed or new-old-stock from spares. They run to original spec but without active manufacturer backing.
How do I configure or set the RET670? Use PCM600 software over Ethernet or front port. Import .scd files for IEC 61850; set protection parameters (CT ratios, zones, harmonics). Always back up existing config before changes—easy reload after swap.
Can I hot-swap or replace without downtime? No—power down the IED for hardware swaps (e.g., I/O cards or unit). Settings store in non-volatile memory; power up pulls config automatically. Use redundant setups for minimal outage if available.
Will swapping lose protection settings? No—parameters reside in flash/EEPROM. Swap unit, power up; it boots with stored config. If corrupted (rare), reload from PCM600 backup. Verify CT/VT connections match.
Why surplus over refurbished RET670 units? Surplus has zero runtime—no component aging, no relay contact wear, no firmware glitches from field use. Refurbs often from service failures with partial testing. We bench-test every 1MRK004816-AB: power-up, HMI check, comms ping, output forcing, and basic protection simulation.
What warranty do you offer? 1-year functional when installed per RET670 manual. Covers defects, not miswiring, overvoltage, or setting errors. Test reports with power-up photos, comms verification, and config read available on request.
