ABB REM543 Machine Protection Terminal (Rotating Machine Terminal)

Description

Technical Specifications

Core System & Performance

• Processing Platform: High‑performance microprocessor with digital signal processing (DSP) for real‑time protection and measurement
• Sampling Rate: 16–32 samples per power cycle for precise fault detection
• Operating Frequency: 45–65 Hz (supports 50/60 Hz systems)
• Measurement Accuracy: Current ±0.5%; Voltage ±0.5%; Power ±1.0%
• Setting Groups: 4 independent setting groups for operational mode switching
• Fault Recording: Disturbance recorder with analog waveform capture and 100+ event storage
• Typical Trip Time: Differential protection ≤ 20 ms; Overcurrent protection ≤ 30 ms
• Event Logging: 10,000+ time‑stamped events with 1 ms resolution
• Programmable Logic: Built‑in PLC with logic gates, timers, and counters for custom automation

Power Supply

• Nominal Voltage: 90–264 V AC / 24–250 V DC (universal wide‑range input)
• Power Consumption: < 15 W (quiescent); < 20 W (operating)
• Isolation: Full galvanic isolation between power, I/O, and communication circuits
• Voltage Ride‑Through: < 50 ms power interruption without relay reset

Analog Inputs

• Phase Current: 3 channels, programmable for 1 A or 5 A nominal (CT secondary)
• Residual Current: 1 channel (5 A/1 A) for earth‑fault detection
• Voltage Inputs: 3 phase voltage + 1 neutral voltage (60–210 V AC nominal)
• Optional RTD Inputs: 8 galvanically isolated channels (Pt100, Pt1000, Cu10) for stator, bearing, and ambient temperature monitoring
• Thermal Withstand: Continuous 20 A; 1 s 500 A (current inputs)
• Dynamic Withstand: Half‑wave 1250 A (current inputs)
• Sensor Compatibility: Conventional CT/VT, Rogowski coils, and voltage dividerseero

Digital I/O

• Binary Inputs: 15 galvanically isolated 24–250 V DC inputs (configurable for pulse counting, 0–100 Hz)eero
• Power Outputs (PO/HSPO): 4 high‑speed power outputs (HSPO) for tripping; 8 general power outputs (PO) for control; double‑pole contacts rated 250 V AC / 30 V DC, 5 Aeero
• Signal Outputs (SO): Configurable NO/NC contacts for alarms and status indicationeero
• HMI: Large graphical LCD display with backlight; 16 dedicated LEDs for status indication
• Local Controls: Pushbuttons for local/remote toggle, reset, and manual operation

Communication Interfaces

• Front Port: Optical RS‑232 for local PC configuration (CAP501 software)
• Rear Ports:
  • RS‑485: Modbus RTU, SPA, LON, IEC 60870‑5‑103
  • Optional: IEC 61850 via SPA‑ZC 400 adapterABB
• Time Synchronization: IRIG‑B input for high‑accuracy time stamping
• Client Capacity: Simultaneous connection to multiple SCADA/control systems

Physical & Environmental

• Dimensions: 266 mm (H) × 144 mm (W) × 280 mm (D)
• Weight: Approx. 3.5 kg
• Mounting: Flush‑mount or rack‑mount (19” rack compatible)
• Protection Rating: IP54 (front); IP20 (rear terminals)
• Operating Temperature: -25 °C to +70 °C
• Storage Temperature: -40 °C to +85 °C
• Humidity: 5%–95% RH (non‑condensing)
• EMC Compliance: IEC 61000 series, EN 50081‑2, CISPR 11
• Certifications: CE, IEC 60255, IEEE C37.90, Marine/Offshore certificationsABB

Functional Features

Comprehensive Protection Functions

Generator Protection

• Differential Protection (87G): Flux‑balance differential for stator winding short‑circuits; high sensitivity for interturn faults
• 100% Stator Earth‑Fault: Sensitive detection for ground faults across the entire stator winding
• Rotor Earth‑Fault (64R): Injection‑based detection for rotor insulation faults
• Overcurrent (50/51): 4‑stage non‑directional overcurrent with definite/inverse time characteristics
• Earth‑Fault (50N/51N): Sensitive residual overcurrent for ground fault detection
• Negative Sequence Overcurrent (46): Protects against unbalanced loads and open‑phase conditions
• Thermal Overload (49): Dual‑time‑constant thermal model for stator/rotor overheating protection
• Over/Undervoltage (27/59): Two‑stage protection against voltage anomalies
• Over/Underexcitation (40): Protects against loss of excitation and overexcitation
• Reverse Power (32): Prevents generator motoring and turbine damage
• Frequency Protection (81): Over/underfrequency and rate‑of‑change‑of‑frequency protection
• Breaker Failure (50BF): Backup tripping for failed circuit breakers

Motor Protection

• Locked Rotor (51/66): Protection during start‑up with start‑per‑hour limiting
• Stall Protection: Detects mechanical jams during operation
• Thermal Modelling: Real‑time rotor/stator temperature estimation
• Starting Supervision: Monitors start‑up duration and prevents excessive starts
• Phase Unbalance (46): Protects against voltage/current unbalance
• Short‑Circuit (50): Instantaneous overcurrent for phase‑to‑phase faults
• Earth‑Fault (50N): Sensitive ground fault detection
• Underload Protection: Detects loss of load or broken coupling

Advanced Control & Automation

• Circuit Breaker Control: Local/remote close/trip with synchrocheck (25) for safe parallelingeero
• Interlocking Logic: Configurable PLC logic to prevent unsafe operations
• Sequence Control: Timed and logic‑based switching sequences
• Trip Circuit Supervision (TCS): Monitors breaker trip‑circuit integrity
• Condition Monitoring: RTD‑based temperature tracking; start‑up counter; wear monitoring

Measurement & Diagnostics

• Real‑Time Measurements: Phase/residual current/voltage, power (P/Q/S), energy, power factor, frequency, and harmonicseero
• Disturbance Recording: Pre/post‑fault waveform capture in standard formats for analysis
• Self‑Diagnostics: Continuous hardware/software monitoring with fault alarms
• Event Logging: Detailed records of all operations, faults, and alarms
• Graphical HMI: Customizable single‑line diagrams and real‑time trends

Flexibility & Integration

• Modular Design: Expandable I/O and optional RTD/mA modules
• Multi‑Protocol Support: Seamless integration with legacy and modern SCADA systems
• Sensor Compatibility: Works with conventional and modern sensing technologies
• Marine Certification: Suitable for offshore and marine power systems
• Legacy Compatibility: Easy retrofit into existing power plant and industrial systems

Application Scenarios

Power Generation Plants

• Small‑to‑Medium Generators: Primary protection for diesel, hydro, and steam turbine generators
• Generator‑Transformer Units: Integrated protection for generator and step‑up transformer blocks
• Cogeneration Plants: CHP unit protection with grid interconnection control
• Backup Power Systems: Standby generator protection for critical facilities

Industrial Motor Applications

• Pumps & Compressors: Large MV motor protection in water treatment, oil & gas, and manufacturing
• Mills & Crushers: Heavy‑duty motor protection in mining and cement production
• Fans & Blowers: Industrial ventilation and process fan motor protection
• Conveyors & Drives: Material handling motor protection in manufacturing plants

Marine & Offshore

• Shipboard Power Systems: Generator and propulsion motor protection
• Offshore Platforms: Power generation and large motor protection in harsh environments
• Subsea Systems: Remote power system protection for subsea installations

Specialized Applications

• Retrofit Projects: Upgrade of legacy protection systems with modern IED technology
• Isolated Power Systems: Standalone generator/motor protection in remote locations
• Industrial Complexes: Integrated protection for multiple rotating machines in a single facility