Description
Product Core Brief
- Model: REM545
- Order Code: AG228AAAA
- Brand: ABB / Hitachi Energy REM545 series
- Core Function: Machine protection terminal for medium-voltage motors and small/medium generators, integrating protection, control, measurement, monitoring and communication.
- Product Type: MV Motor and Generator Protection Relay
- Key Specs: Overcurrent and earth-fault protection | Thermal overload and locked-rotor protection | Differential protection option | Voltage, frequency and power protection | Programmable logic | IEC 61850 / Modbus / Profibus support | RTD and analog I/O options | Local HMI with single-line diagram display
- Condition: New Original / New Surplus
Product Introduction
The ABB REM545 is a machine protection and control terminal designed for medium-voltage rotating equipment. It is typically applied to large synchronous and asynchronous motors, such as pumps, mills, crushers, fans and compressors, and can also be used for small and medium generators or generator-transformer units in industrial and utility power systems.
REM545 provides comprehensive protection functions, including overcurrent protection, earth-fault protection, thermal overload protection, locked-rotor protection, start-up supervision, negative-sequence protection, under/over-voltage protection, under/over-frequency protection, reverse/low forward power protection and optional differential protection. It also supports measurement of current, voltage, active/reactive power, power factor, frequency and energy, together with event recording and fault recording.
The order code AG228AAAA defines the hardware configuration, I/O arrangement, communication options, auxiliary supply and firmware features. Because REM545 variants differ by application package and module configuration, the full type code must be verified against the installed nameplate before procurement.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Name | REM545 Machine Protection and Control Terminal |
| Order Code | AG228AAAA |
| Brand | ABB / Hitachi Energy REM545 series |
| Primary Function | Motor and generator protection, control, measurement and condition monitoring |
| Typical Applications | MV synchronous/asynchronous motors, generator units, pumps, mills, crushers, fans, compressors |
| Communication | Modbus, Profibus, IEC 61850 via SPA-ZC adapter; options depend on configuration |
| Engineering Tool | CAP 501 / CAP 505; PCM600 support depends on hardware/firmware version |
| Condition Available | New Original / New Surplus |
Note: Public sources confirm REM545 as an ABB machine protection terminal for MV motors and generators, with overcurrent, earth-fault, thermal overload, differential, voltage, frequency and power protection functions. However, the exact auxiliary voltage, I/O count, communication ports, RTD/analog modules and firmware for order code AG228AAAA are not fully confirmed in open sources. Always verify the installed nameplate, hardware version and configuration before replacement.
Quality Control Process
Each REM545 unit is inspected for housing condition, front-panel HMI, terminal blocks, communication ports, mounting hardware 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. AG228AAAA must match the original device. Other REM545 order codes may differ in I/O count, communication options, RTD modules and protection functions.
❗ Verify the engineering tool. REM545 has been configured with CAP 501 / CAP 505 in earlier versions, while newer Relion 545 variants may use PCM600. Confirm compatibility before migration.
❗ Check I/O and RTD configuration. Confirm the number of binary inputs/outputs, RTD channels and analog I/O, especially if stator winding, bearing or ambient temperature monitoring is used.
❗ Review communication protocol. Modbus, Profibus and IEC 61850 availability depends on the installed communication module and firmware.
❗ Back up configuration before removal. Export protection settings, PLC logic, I/O mapping, communication parameters, event records and fault recordings. Photograph terminal wiring and HMI status before replacement.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Related Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| ABB | ABB REM545, same order code | Direct | Confirm hardware version, I/O and communication |
| ABB | Other REM545 variants | Needs Adaptation | Verify I/O, RTD, communication and protection functions |
| ABB | ABB REM543 | Needs Adaptation | Smaller form factor; I/O and features may differ |
| ABB | ABB REF615 / REF620 | Not Direct | Feeder protection platform; not a direct motor/generator protection replacement |
| ABB | ABB REG670 | Not Direct | Generator-specific protection platform; application scope differs |
Benchmarks
- Platform: ABB / Hitachi Energy REM545 machine protection terminal.
- Typical use: MV motor and small/medium generator protection with integrated control, measurement and condition monitoring.
- Key advantage: comprehensive rotating-machine protection library, flexible I/O and communication options, programmable logic and strong integration with MV switchgear and automation systems.
