Description
At-A-Glance Executive Brief
- Model: REM543, full ordering code REM543CM216AAAA
- Brand: ABB
- Part Type: Bay control and protection IED
- Lifecycle status: OEM obsolescent, stocked for utility brownfield substation retrofits
- System compatibility: Substation bay panels, IEC 60870-5-103 communication
- Weight: 2.2 kg
Technical Introduction
Unplanned bay IED failure blocks local breaker control and remote SCADA signalling during network disturbances. This panel-mounted IED combines feeder protection, bay control, interlocking and fault recording functions in one compact unit. It handles overcurrent, earth fault and thermal protection for medium voltage feeders while managing breaker close/trip commands from local HMI or remote SCADA. Built-in disturbance records capture waveform data for post-fault analysis, and the serial interface integrates the device into existing substation DCS I/O mapping. Utility sites hold spare IEDs to cut outage duration during legacy substation migration.
- Best Suited For
- Medium voltage feeder bay control cubicles
- Substation panels with IEC 60870-5-103 SCADA links
- Direct replacement of aging REM543 series protection IEDs
Core Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | REM543CM216AAAA (short form REM543) |
| Device Type | Bay control & feeder protection IED |
| Protection Functions | Overcurrent, earth fault, thermal overload |
| Communication Protocol | IEC 60870-5-103 |
| Local Interface | Front panel HMI, status LEDs |
| Mounting | Panel flush mount |
| Fault Recording | Disturbance waveform capture |
| Weight | 2.2 kg |
| Environmental Details | Please refer to the OEM datasheet for complete environmental tolerances. |
Field Engineer’s Tech Notes
- Confirm the firmware revision before replacement. Mismatched firmware can lead to incorrect logic execution and failed SCADA point mapping even with matching ordering codes.
- Check auxiliary supply voltage range. Wrong control supply selection will not always blow fuses immediately; it may cause intermittent loss of breaker control under cold cabinet temperatures.
Adaptive QA & Testing Protocol
Each IED undergoes bench testing on a protection test set. We inject secondary current and voltage signals to verify overcurrent and earth fault element pickup and trip timing. Local HMI navigation and status LED operation are validated. IEC 60870-5-103 node handshake is verified with a SCADA simulator, and disturbance record capture is tested. Full test reports or bench test video clips are available upon request.
Buyer’s FAQ
Q: What does REM543CM216AAAA designate versus the short REM543? A: REM543 is the product series name. CM216AAAA defines hardware options, I/O layout and firmware package. Use the full code to confirm compatibility.
Q: What warranty applies for refurbished and NSFP REM543CM216AAAA? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes damage from miswiring, incorrect auxiliary supply or improper secondary injection testing.
Q: What lead time should I expect? A: Stocked units ship 3–7 business days. If inventory is depleted, lead time increases while we source available surplus IEDs.
Q: Can I reuse the existing configuration file from my old REM543? A: Configuration transfer is possible, but the file must match the hardware option set and firmware version of the replacement unit. Validate all protection settings before energizing the bay.
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