ABB 1MRK002814-AB Relion 670 Bay Automation Unit
The ABB 1MRK002814-AB, also cataloged as the REC670 Bay Control IED, operates as a dedicated hardware component for bay-level primary equipment control and interlocking execution within ABB Relion 670 platforms. The device captures 1 A or 5 A current transformer secondary signals along with voltage transformer inputs up to 110 VAC across 50/60 Hz networks. It processes multi-bay logic sequences and executes switching commands for circuit breakers, disconnectors, and earthing switches over deterministic IEC 61850 station bus architectures.
Suffix Breakdown & Model Matrix
| Code / Suffix | Designation | Specification Description |
|---|---|---|
| REC670 | Base Model | Bay Control IED within the Relion 670 Series |
| 1MRK002814-AB | Hardware Ordering Code | Specific hardware build with universal power supply and digital I/O |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1MRK002814-AB |
| Brand | ABB |
| Origin | Sweden |
| Weight | 3.0 kg |
| Dimensions | 190 x 170 x 200 mm |
| Operating Temp | -25 to +70 deg C |
| Power Consumption | Universal 24-250 VDC or 48-240 VAC |
| Module Type | Bay Automation Unit |
| Rated Current Input | 1 A or 5 A (Selectable) |
| Rated Voltage Input | Up to 110 VAC (Secondary) |
| Nominal Frequency | 50 / 60 Hz |
| Communication Protocols | IEC 61850 Ed 1 & 2, IEC 60870-5-103, Modbus, DNP3 |
| Time Synchronization | SNTP, IRIG-B, GPS |
| Storage Temp | -40 to +85 deg C |
Substation Automation and Deterministic Network Integration
The unit incorporates dedicated Ethernet hardware to handle deterministic IEC 61850 GOOSE messaging and Sampled Values across substation local area networks. High-speed processor hardware guarantees low-latency trip and interlock signal propagation, preventing conflicting breaker operations across adjacent substation bays. Internal firmware flash memory maintains non-volatile sequence-of-events recording and fault logs, synchronizing timestamps down to sub-millisecond precision via SNTP or IRIG-B signals.
Frequently Asked Questions
Q: How is the secondary current transformer rating configured on the unit?
A: CT inputs handle 1 A or 5 A nominal secondary currents via terminal selection and software parameters configured through the relay management tool.
Q: What protocols are supported for direct communication with higher-level SCADA systems?
A: In addition to native IEC 61850, the IED supports legacy substation protocols including IEC 60870-5-103, DNP3, and Modbus RTU/TCP over serial or Ethernet interfaces.
Q: How does the auxiliary power supply accommodate fluctuating substation DC battery banks?
A: The wide-range universal power supply operates seamlessly across an input band of 24 to 250 VDC or 48 to 240 VAC, absorbing voltage sags without dropping internal logic state memory.
Field Installation Guidelines
Mount the chassis into a standard 19-inch relay panel cutout or flush-mount opening using the designated front-flange screw points. Ensure adequate clear space above and below the rear heat dissipation fins to allow natural convection cooling. Ground the chassis frame directly to the primary substation copper earth bar using a short, low-impedance braided strap before applying auxiliary power.
Route incoming CT and VT measurement secondary wiring through dedicated test blocks to allow safe current injection and isolation during commissioning. Shield all Ethernet communication and binary input cables, grounding the shield braids at the cabinet entry gland plate to prevent high-voltage switching surges from degrading signal integrity.
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