Description
Product Core Brief
- Model: REF545
- Order Code: REF545KC133AAAA
- Brand: ABB
- Core Function: Medium-voltage feeder protection terminal integrating protection, control, measurement, monitoring and programmable logic.
- Product Type: MV Feeder Protection and Control IED
- Key Specs: Phase and earth-fault protection | Directional/non-directional overcurrent | Voltage and frequency protection | CBFP and auto-reclose | PLC programmable logic | LON communication | IEC 61850 via SPA-ZC 400
- Condition: New Original / New Surplus
Product Introduction
The ABB REF545 is a medium-voltage feeder protection and control terminal from the REF54x family. It is designed for distribution and industrial power systems, providing protection, control, measurement, monitoring and automation logic for feeders, transformers, motors and capacitor banks.
REF545 supports non-directional and directional overcurrent and earth-fault protection, overvoltage and undervoltage protection, residual voltage protection, thermal overload protection, breaker failure protection and auto-reclose. It also provides synchrocheck, frequency protection, fault location, event recording and disturbance recording. With built-in PLC logic, automation and interlocking functions can be integrated directly into the terminal. Communication options include LON, IEC 60870-5-103, DNP 3.0, Modbus and IEC 61850 through the SPA-ZC 400 gateway.
The order code REF545KC133AAAA defines the specific hardware and function configuration. Because ABB REF54x terminals can differ by I/O count, communication options, measurement inputs and protection packages, the full type code must be verified against the installed nameplate before procurement.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Name | REF545 Feeder Protection Terminal |
| Order Code | REF545KC133AAAA |
| Brand | ABB |
| Product Family | REF541 / REF543 / REF545 series |
| Primary Function | Feeder protection, control, measurement, monitoring and PLC logic |
| Typical Applications | MV feeders, transformer feeders, motor feeders, capacitor banks, distribution substations |
| Communication | LON, IEC 60870-5-103, DNP 3.0, Modbus, SPA; IEC 61850 via SPA-ZC 400 |
| Configuration | Local HMI and PC engineering tool |
| Condition Available | New Original / New Surplus |
Note: Public sources confirm REF545 as an ABB medium-voltage feeder protection terminal with protection, control, measurement, PLC logic and multi-protocol communication. However, the exact I/O configuration, auxiliary voltage, measurement modules and protection package for order code REF545KC133AAAA are not fully confirmed in open sources. Always verify the installed nameplate, software version and engineering data before replacement.
Quality Control Process
Each REF545 unit is inspected for housing condition, front-panel HMI, terminal blocks, communication ports, mounting points and nameplate data. Where test conditions allow, auxiliary power, LED indicators, HMI display and communication interfaces are checked to confirm basic readiness. The unit is packed with anti-static and shock-resistant protection to prevent damage to terminals, connectors and display components during transit.
Replacement Pitfall Guide
❗ Confirm the full order code. REF545KC133AAAA must match the original device. Other REF54x order codes may differ in I/O configuration, communication options and protection packages.
❗ Verify the protection package. Check whether the original unit is configured for feeder, transformer, motor or capacitor protection, and whether directional overcurrent or earth-fault functions are enabled.
❗ Check communication configuration. LON, IEC 60870-5-103, DNP 3.0, Modbus or IEC 61850 support depends on the installed hardware and gateway configuration.
❗ Review PLC and interlocking logic. Automation sequences, bay interlocking, auto-reclose logic and I/O mapping must be restored from the original engineering data.
❗ Back up configuration before removal. Export protection settings, PLC logic, communication parameters, event records and fault recordings. Photograph terminal wiring, HMI status and module configuration before replacement.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Related Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| ABB | ABB REF545, same order code | Direct | Confirm protection package, I/O and communication |
| ABB | Other REF545 variants | Needs Adaptation | Verify I/O count, communication and protection functions |
| ABB | ABB REF543 / REF541 | Needs Adaptation | Different I/O and function configuration within same family |
| ABB | ABB REF542plus | Not Direct | Different platform; wiring, HMI and configuration differ |
| ABB | ABB REF615 / REF620 | Needs Engineering | Newer platform; panel cutout, wiring and engineering must be reviewed |
Benchmarks
- Platform: ABB REF54x medium-voltage feeder protection terminal.
- Typical use: MV feeder, transformer, motor and capacitor protection with integrated control and PLC logic.
- Key advantage: combines protection, measurement, control, fault location and automation logic in one configurable terminal.
If you can share a nameplate photo, existing I/O list, communication configuration and protection package, I can help confirm whether REF545KC133AAAA is a direct drop-in for your feeder bay.
