ABB REM543CG214AAAA
ABB REM543CG214AAAA
ABB REM543CG214AAAA
ABB REM543CG214AAAA

ABB REM543CG214AAAA | REM543 Series Generator/Motor Protection Terminal

  • Brand: ABB
  • Model: REM543CG214AAAA
  • Product Type: Medium Voltage Motor Protection Relay
  • Series: REM543 Series
  • Core Function: Provides comprehensive protection (overcurrent, differential, negative sequence, under/overvoltage) and control for medium-voltage motors/generators; enables fault detection, isolation, and operational parameter monitoring.
  • Key Specs: 6-10kV voltage range, 100A-800A current range, RS485 (MODBUS-RTU/Profibus-DP) communication.
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Description

REM543CG214AAAA: Product Overview
The REM543CG214AAAA is a medium voltage motor protection relay within ABB’s REM543 series, designed for deployment in industrial power distribution systems to safeguard 6-10kV asynchronous/synchronous motors and generators. Its role is to act as a dedicated protection and control unit, positioned between the motor/generator and upstream circuit breakers. In continuous process industries—such as power generation, metallurgy, and petrochemicals—it mitigates equipment damage by detecting electrical faults (e.g., short circuits, overloads) and mechanical anomalies (e.g., rotor imbalance) in real time.
Functionally, the relay processes three-phase current and voltage signals from current transformers (CTs) and voltage transformers (VTs), applying algorithms for overcurrent, differential, negative sequence, undervoltage, and overvoltage protection. It executes trip commands to disconnect faulty equipment via integrated control outputs, while logging fault data for post-event analysis. As part of the REM543 series, it leverages a platform optimized for medium-voltage applications, offering modular configurability, compliance with IEC 60255 protection standards, and integration with industrial communication networks. Benefits include reduced unplanned downtime, extended motor lifespan, and simplified compliance with safety regulations.

ABB REM543CG214AAAA

ABB REM543CG214AAAA

REM543CG214AAAA: Technical Specifications
  • Model Number: REM543CG214AAAA
  • Manufacturer: ABB
  • Product Type: Medium Voltage Motor Protection Relay
  • Voltage Range: 6-10kV (line-to-line)
  • Current Range: 100A-800A (adjustable per motor rating)
  • Frequency: 50Hz/60Hz
  • Overcurrent Protection: Definite time (0.5-10s), inverse time (1-100s, IEC 60255-compliant)
  • Differential Protection: 0.1-1.0Ie (Ie = rated current), trip time ≤30ms
  • Negative Sequence Current Protection: 0.1-1.0Ie
  • Undervoltage Protection: 0.3-0.9Ue (Ue = rated voltage)
  • Overvoltage Protection: 1.1-1.5Ue
  • Communication Interface: RS485 (MODBUS-RTU, Profibus-DP)
  • Operating Temperature: -25°C to +70°C
  • Ingress Protection: IP54
  • Mounting: 35mm DIN rail or wall-mount

    ABB REM543CG214AAAA

    ABB REM543CG214AAAA

Core Features & Customer Value​
Comprehensive protection suite: Integrates five core protection functions (overcurrent, differential, negative sequence, under/overvoltage) to address common motor failure modes. For customers, this eliminates the need for multiple standalone relays, reducing panel space, wiring complexity, and maintenance overhead. The differential protection’s ≤30ms trip time minimizes damage from internal winding faults, critical for high-value assets like generator stators.
Flexible control and monitoring: Supports local/remote start/stop commands, 8-segment speed control, and linkage with upstream breakers. Engineers can configure protection setpoints (e.g., overcurrent thresholds) via software, adapting to varying motor loads without hardware changes. Real-time monitoring of current, voltage, power, and frequency—paired with 10-event fault logging—streamlines troubleshooting, reducing mean time to repair (MTTR) by up to 40%.
Robust environmental design: Industrial-grade components and IP54 rating ensure reliability in harsh settings (e.g., dusty cement plants, humid refineries). Wide temperature tolerance (-25°C to +70°C) and EMC compliance (IEC 61000-4) prevent nuisance trips from electrical noise. For procurement teams, this extends service life and lowers replacement costs compared to non-industrial alternatives.
Typical Applications​
In power generation plants, the relay protects 6-10kV generator auxiliaries (e.g., boiler feedwater pumps), coordinating with excitation systems to trip on stator winding faults. Its RS485 interface feeds data to the plant’s SCADA, enabling remote adjustment of protection setpoints during load changes.
At a steel mill, it safeguards高炉风机 (blast furnace fans) by detecting negative sequence currents from unbalanced loads, preventing rotor overheating. The 8-segment speed control integrates with the mill’s DCS to adjust fan speed based on blast furnace demand.
In a petrochemical refinery, the relay protects 10kV compressor motors, using differential protection to isolate turn-to-turn shorts in motor windings. Its fault log helps identify recurring issues, such as insulation degradation from prolonged exposure to hydrocarbon vapors.

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