Description
ABB REM545 MACHINE TERMINAL REM545BM222BAAA
REM545 Machine Terminal (Model Code: REM545BM222BAAA) Full Introduction
1. Product Overview
REM545BM222BAAA is an all-in-one integrated machine protection, control, measurement and condition monitoring terminal within the Relion 545 series, dedicated to rotating equipment including medium-voltage synchronous/asynchronous motors and small-to-medium generator-transformer units. It integrates protection logic, programmable automation logic, local human-machine interaction and multi-channel signal acquisition into a single panel-mounted unit, eliminating the need for numerous auxiliary relays and separate monitoring devices. This specific model variant is equipped with built-in RTD analog input channels for winding and bearing temperature monitoring, matched digital I/O layout and multi-standard communication hardware for industrial power and marine power applications. The unit is designed for indoor cabinet installation with IP20 protection rating, and it is a legacy series now only available as spare parts for maintenance replacement.
ABB REM545 MACHINE TERMINAL REM545BM222BAAA
2. Hardware Structure & Front Panel Interface
The terminal adopts a standard embedded panel mounting structure with a metal casing for industrial anti-interference performance.
Front panel layout includes a graphical LCD display for real-time electrical measurements, custom single-line mimic diagrams, fault event records and setting parameters. Multiple dedicated LED status indicators separately display running status, protection trip signals, alarm events, communication faults and power supply status. A full set of navigation and function buttons supports local parameter modification, fault history browsing and manual control operations without external software tools.
Rear terminal blocks are divided into independent isolated groups: analog measurement terminals for CT/PT secondary signals, RTD temperature input terminals, digital binary input terminals, relay output terminals, power supply terminals and multi-type communication ports. All analog input circuits carry galvanic isolation to block industrial switching surges and electromagnetic noise. This model provides abundant binary input channels and multi-group isolated relay output contacts for breaker control, remote signalling and interlock logic.
3. Core Electrical Specifications
- Auxiliary power supply: Wide-range universal AC/DC power input covering common substation control voltage grades
- Current measurement input: Compatible with 1A or 5A secondary current transformers
- Voltage measurement input: Matches standard 100V voltage transformer secondary circuits
- Analog monitoring: Integrated RTD temperature input channels for stator winding and bearing thermal supervision
- Digital I/O: Sufficient binary inputs for collecting breaker, disconnector and external fault contact signals; multiple isolated relay dry contact outputs for trip, alarm and interlock control
- Sampling performance: High-speed DSP waveform sampling engine for accurate RMS value, harmonic component and symmetrical component calculation
- Operating temperature range: -20°C to +70°C for continuous cabinet operation
- Communication interfaces: Supports SPA bus, LON bus, Modbus serial protocols; optional adapter enables IEC 61850 series communication for substation automation systems
- Environmental certification: Compliant with marine and offshore working condition standards for ship power distribution systems
4. Complete Functional Modules
4.1 Protection Functions
Full protection suite for rotating machinery: three-stage phase overcurrent, directional earth fault protection, thermal overload protection with thermal memory curve, unbalanced load and negative sequence protection, stall protection, start-up time supervision with cumulative start counter, under/over voltage, over/under frequency, over-temperature trip and alarm based on RTD data. For generator applications, it adds under-excitation, loss of excitation, reverse power motoring protection and impedance backup protection. All protection elements feature configurable time delay and blocking logic to avoid misoperation during motor startup or transformer energization.
4.2 Measurement & Condition Monitoring
Real-time acquisition of three-phase currents, line and phase voltages, zero-sequence current and voltage, active/reactive/apparent power, power factor and system frequency. It records maximum/minimum electrical demand values, accumulates forward and reverse electric energy, and monitors winding and bearing temperature via connected RTD sensors. Built-in disturbance recorder captures pre-fault and post-fault voltage/current waveforms for post-event fault analysis, and stores a complete event log of protection startup, trip actions and switch position changes.
4.3 Control & Programmable Logic
Embedded PLC-style programmable logic function supports custom sequential control, equipment interlock and automatic sequence logic, which greatly reduces hard-wiring between protection terminals. It provides local and remote control authority for circuit breakers, with trip circuit supervision function to detect broken trip coil wiring in real time. Custom mimic diagram editing allows users to display equipment status, measurement data and alarm prompts matching on-site primary system layout.
4.4 Communication Functions
Multi-channel independent communication supports horizontal interbay data exchange and vertical connection with upper monitoring systems. Optical communication options eliminate electromagnetic interference for long-distance transmission. Uploadable data includes real-time measurements, fault records, disturbance waveforms and protection setting groups; remote parameter modification and signal interrogation are fully supported.
5. Typical Application Scenarios
- Medium-voltage large asynchronous and synchronous motors used in pumps, fans, mining mills, crushers and metallurgical rolling equipment
- Small and medium hydroelectric, diesel and steam turbine generator sets and generator-transformer units in power plants
- Marine and offshore power distribution systems for shipboard rotating machinery protection
- Industrial plant medium-voltage distribution cabinets, compact box-type substations requiring integrated motor protection and automation control
- Sites demanding unified temperature monitoring, fault recording and multi-device interlock logic for rotating equipment
6. Basic On-Site Fault Diagnosis
- Power LED off: Loss of auxiliary supply, internal power circuit damage or poor wiring connection
- Protection trip LED illuminated: Overcurrent, earth fault, thermal overload, stall or temperature over-limit triggered trip; detailed fault values and timestamps can be checked via local display
- Communication link failure: Damaged communication cable, mismatched communication address or protocol parameter setting error
- RTD temperature reading abnormal: Broken temperature sensor wiring, short-circuit of RTD channels or sensor failure
- Unstable signal jitter: Insufficient cable shielding, inadequate circuit isolation or severe electromagnetic interference from nearby high-current switching devices
