ABB REM543CG216AAAA is a comprehensive protection terminal for rotating motors (microcomputer protection relay).
I. Model Basic Interpretation
Product Series: REM543 (Machine Protection Terminal, comprehensive protection device for motors / generators)
Complete Order Model: REM543CG216AAAA
Belongs to ABB 540 series substation automation protection products, originally produced by ABB (Legacy old model), current spare parts are circulated through inventory new machines, disassembly test / maintenance parts; Supporting setting software: CAP505.
Model Code Breakdown
REM543 = Rotating Motor Protection Unit (suitable for medium and high voltage motors, small and medium-sized hydroelectric / diesel generators)
C = Hardware Configuration Version
G = Power / Input Specifications
216 = DI/DO, RTD, communication hardware configuration code
AAAA = Software Version / No Special Customization
Core Functions
REM543 is specifically used for comprehensive relay protection, measurement, control, fault recording for medium and large power asynchronous / synchronous motors, small and medium-sized hydroelectric / diesel generators, power – transformer groups. It is commonly used for:
Protection of high-voltage motor cabinets for power plant fans, pumps, ball mills, crushers
Main protection for self-owned power stations, small generator sets
Motor protection for marine / ship use (with classification certification)
Built-in Main Protection Functions (Corresponding to ANSI Standards)
Overcurrent: Three-stage non-directional / directional overcurrent (50/51, 67), voltage locked overcurrent (51V)
Ground Fault: Three-stage zero-sequence overcurrent, directional ground fault (50N/51G, 67N), zero-sequence voltage protection (59N)
Voltage: Overvoltage, undervoltage, three-phase imbalance, low impedance backup (21)
Motor-specific protection: Statorage protection, start-up timeout, cumulative start-up times limit, thermal overload, negative sequence imbalance, loss of magnetism / under-magnetization, reverse power (to prevent motor from being reversed to generate electricity)
Generator-specific: Reverse power protection, excessive frequency / low frequency, stator / rotor differential protection
Temperature measurement expansion: Supports up to 8 RTD (Pt100 etc.) monitoring of winding, bearing temperature, with over-temperature alarm and trip
Measurement and Recording Capabilities
Real-time collection of three-phase current / voltage, zero-sequence quantity, active / reactive power / power factor, frequency
Fault recording: Sampling 2kHz (50Hz system), can record current voltage waveforms + switch quantity changes, export in COMTRADE format for post-fault analysis
SOE Event Sequence Recording, millisecond-level timestamp, facilitating trip traceability
Built-in programmable PLC logic, can customize interlocks, closing lock, linkage logic, reducing the need for external intermediate relays
Communication and IO Configuration (216 Configuration Corresponding Specifications)
Built-in digital input DI, trip / signal output DO relays, two trip circuits monitoring
Communication interfaces: Support SPA bus, LON, Modbus RTU; add SPA-ZC400 module to support IEC61850
Front panel local RS232 debugging port, can be connected to a laptop for downloading / uploading protection settings, reading fault records
With a local LCD display, can locally view current, temperature, alarms, trip events
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