About ABB REM543 CG214AAAA PROTECTION RELAY

ABB REM543 CG214AAAA PROTECTION RELAY

The REM 543 machine protection terminals are used as the main protection system of generator and generator-transformer units in power plants.

The REM 543 machine terminals are used as the main protection system of generator and generator-transformer units in small and medium-power diesel, hydroelectric and steam power plants. The protection for large and/or important MV synchronous and asynchronous motors used, for example, in pumps, mills and crushers during start-up and normal run, forms another application area.

The protection functions of REM 543 are designed for selective short-circuit and earth-fault protection of rotating machines. Unlike most other power system components, rotating machines also need protection against abnormal operating conditions such as over-current, unbalanced load, over-temperature, over-voltage, over and under-excitation, under-impedance, over and under-frequency and generator motoring. For motor protection start-up supervision, there are also stall protection and cumulative start-up counter features.
Product benefits

• Extensive protetion for motors and generators
• Programmable logic functions (PLC)
  
• Optical communication for fast disturbance-free communication
• Flexible connectivity and IEC 61850 support
• Certified for marine and off-shore use

Product features

• Voltage and current measurement via conventional measuring transformers or current sensors and voltage dividers
  
• Support for IEC 61850 protocol through the SPA-ZC 400 adapter
• 15 binary inputs and 12 output relays and optional RTD

Versatile Protection Capabilities

The ABB REM543 CG214AAAA offers extensive protection features including differential, overcurrent, and earth fault protection, ensuring safety and operational stability in generator and motor systems. With fast, adjustable operate times and integrated disturbance/fault recording, operators can maintain optimal system reliability under varied conditions.


Advanced Communication and Integration

Supporting RS232, RS485, fibre optic, and Ethernet communication ports, this relay integrates easily with modern SCADA and substation automation systems. The multilingual interface and configurable settings via the HMI make it convenient for operators worldwide to tailor its performance, minimizing training and deployment efforts.


Durable and User-Friendly Design

Constructed for harsh environments, the relay features an IP54-protected front, high dielectric strength, and robust screw-type terminals. The LCD alphanumeric display enhances usability, while firmware upgradability and modular logic inputs provide room for system growth as technology or requirements advance.