ABB REM543CG212AAAA Motor Protection Terminal

Technical Specifications

• Rated Current: 1A or 5A (field-selectable)
• Rated Voltage: 24-250V DC / 48-230V AC (auxiliary power supply)
• Frequency Range: 45-65Hz
• Sampling Rate: 1.6kHz (16-bit A/D conversion)
• Protection Functions:
  • Overcurrent protection (50/51) with定时限 (definite time) and反时限 (inverse time) characteristics
  • Earth fault protection (51N) for detecting zero-sequence current
  • Negative sequence current protection (46) to monitor motor imbalance
  • Overvoltage/undervoltage protection (59/27)
  • Voltage-controlled overcurrent protection
  • Thermal overload protection (49) based on the I²t model with ambient temperature compensation
  • Differential protection (87) for internal motor faults
  • Underexcitation protection (48)
  • Frequency abnormal protection (81)
  • Motor start supervision
• Measurement Functions:
  • Phase currents, line voltages, phase voltages
  • Zero-sequence current and voltage
  • Frequency, power factor, active/reactive power, and energy measurement
• Control Functions:
  • Local and remote control of circuit breakers and isolators
  • Synchronization check for parallel operation
  • Interlocking functions for switchgear
• Communication Interfaces:
  • 1 x RS-485 (Modbus RTU / IEC 60870-5-103)
  • Optional PROFIBUS-DP interface
• Display: 4-line, 20-character LCD with backlight, supporting Chinese menus
• Operating Temperature: -25°C to +70°C
• Protection Class: IP52 (front panel)
• Mounting Options: Flush panel mounting (96×96×135mm) or DIN rail mounting (90×70×115mm)
• Weight: 0.65kg

Key Features

• Comprehensive Protection: Offers a wide range of protection functions to detect and isolate faults quickly, preventing motor damage.
• High Precision Measurement: Accurate measurement of electrical parameters ensures reliable monitoring of motor performance.
• Flexible Configuration: Users can customize protection settings, control logic, and communication parameters to meet specific application requirements.
• User-Friendly Interface: The large LCD display and intuitive menu system simplify parameter setting, status monitoring, and fault diagnosis.
• Advanced Communication: Supports multiple communication protocols for seamless integration with DCS/SCADA systems and other automation devices.
• Robust Design: Designed for harsh industrial environments with high reliability and long service life.
• Energy Efficiency: Passive cooling design reduces power consumption (<5W) and minimizes heat generation.

Application Scenarios

• Power Generation: Protects motors in diesel, hydroelectric, and steam power plants, ensuring stable operation of generators and auxiliary equipment.
• Industrial Automation: Used in critical motor protection applications such as pumps, fans, mills, and crushers to prevent costly downtime.
• Marine Environments: Provides compact and reliable motor protection solutions for shipboard applications.
• Oil and Gas: Monitors and protects motors in offshore platforms and refineries, ensuring safety and operational continuity.
• Water Treatment: Safeguards motors in pumping stations and water treatment facilities, preventing water hammer and other damaging conditions.
• Mining: Protects motors in conveyor systems, crushers, and other heavy-duty equipment used in mining operations.