ABB REM545AG228AAAA | ABB REM54 Series Intelligent Machine Protection Terminal

ABB REM545AG228AAAA | ABB REM54 Series Intelligent Machine Protection Terminal

  • Model: REM545AG228AAAA
  • Brand: ABB
  • Series: REM54 Machine Terminals (REM545)
  • Core Function: Provides integrated motor and generator protection, measurement, control, and monitoring functions for rotating electrical machines.
  • Product Type: Numerical Machine Protection Relay / Motor Management Terminal
  • Key Specs:
    • Current transformer inputs: 1A/5A
    • Voltage measurement inputs: 100V class
    • Integrated protection, control logic, disturbance recording, and communication functions
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Category: SKU: ABB REM545AG228AAAA

Description

Key Technical Specifications

Parameter Value
Manufacturer ABB
Model REM545AG228AAAA
Product Type Machine Protection Terminal
Series REM54 / REM545
Application Motor and generator protection
Current Inputs CT inputs for 1A / 5A secondary currents
Voltage Inputs Voltage transformer inputs, 100V class
Frequency 50/60Hz
Auxiliary Power Supply 110/120/220/240VAC or 110/125/220VDC (PS1/240V configuration)
Digital Inputs Up to 25 binary inputs depending on hardware configuration
Relay Outputs Multiple trip, control, and alarm outputs
Analog Inputs RTD / analog measurement options depending on configuration
Communication Serial communication options; system-dependent protocols
Protection Functions Overcurrent, earth fault, motor thermal protection, voltage and frequency protection
Control Functions Motor start/stop logic, breaker/contactor control, programmable logic
Disturbance Recording Integrated fault recording
Configuration Software ABB PCM600 / compatible engineering tools
Mounting Panel mounting, modular half-rack enclosure
Display Integrated graphical HMI display

 

Product Introduction

 

ABB REM545AG228AAAA Overview

The ABB REM545AG228AAAA is a REM545 machine terminal designed for protection, control, and monitoring of medium-voltage motors and generators. It combines electrical protection functions, measurement, programmable logic, and operator interface capabilities into a single panel-mounted relay platform.

The ABB REM545AG228AAAA is commonly used in industrial power systems where rotating equipment availability is critical. Its integrated protection functions reduce the need for multiple standalone relays while providing event records and operating data for maintenance analysis.

REM545AG228AAAA

Application Scenarios & Field Pitfalls (The Engineer’s Perspective)

 

Engineering Pain Point

A large process motor trips during operation, causing production interruption. The immediate assumption is often a motor winding problem, but the actual cause may involve protection settings, starting sequence logic, CT wiring errors, or incorrect thermal model parameters.

The REM545AG228AAAA sits at the protection and control layer. A replacement relay must match the original hardware configuration, application logic, and protection settings. Installing the hardware without restoring configuration data can leave the motor inadequately protected.

 

Typical Applications

  • Oil & Gas Facilities – Protection and control of compressor motors, pumps, and auxiliary rotating equipment.
  • Power Generation Plants – Generator auxiliary motors, boiler feed pumps, cooling system motors, and large drives.
  • Mining Operations – Protection of conveyor motors, crushers, and mill drive systems.
  • Chemical Processing Plants – Medium-voltage motors used for pumps, mixers, and process equipment.

 

Technical Pitfalls to Avoid

  1. Verify CT and VT Configuration

    Incorrect current transformer ratios or voltage transformer settings can cause incorrect protection operation. Always compare relay parameters with the original commissioning documents.

  2. Backup Protection Settings Before Replacement

    REM545 units contain application-specific logic and protection settings. Save the complete configuration before removing an existing relay whenever possible.

  3. Check Hardware Variant Code

    REM545 ordering codes define I/O boards, power supply type, and analog interface options. A relay with a similar model name may not have identical hardware.

 

Related Products

  • ABB REM543
    Smaller REM54 series machine terminal designed for motor protection applications requiring fewer I/O points. Suitable for less complex motor control systems.
  • ABB REM545B Series
    Related REM545 hardware family with different ordering configurations for motor and generator protection applications.
  • ABB REF545
    Feeder protection relay platform from the same generation. Used for electrical distribution protection rather than rotating machine protection.
  • ABB RET545
    Transformer protection relay within the same relay family generation. Designed for transformer differential and related protection functions.
  • ABB REC545
    Bay control and protection terminal used in substation automation applications.
  • ABB PCM600
    Engineering tool used for configuring protection relays, managing settings, and maintaining application databases.
  • ABB REF615
    Modern feeder protection relay platform used in migration projects replacing older ABB protection equipment.
  • ABB REM615
    Modern motor protection relay platform for applications replacing legacy REM54 machine terminals.

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