The ABB REF543K is a key component in the automation and protection of electrical power systems, specifically in medium-voltage applications.

Product Name

ABB REF543K (or REF543KM127AAAA for specific configurations)

Product Description

The ABB REF543K is an intelligent relay designed for protection, control, and monitoring of medium-voltage networks. It offers comprehensive protection features for transformers, feeders, and generators, along with additional functionalities for automation, control, and communication within electrical systems.

Product Parameters and Specifications

• Protection Functions:
  • Overcurrent protection (phase and earth)
  • Differential protection (for transformers and generators)
  • Transformer protection with thermal overload monitoring
  • Voltage protection (over and under voltage)
  • Frequency protection (over and under frequency)
  • Directional protection functions
  • Instantaneous, definite time, and inverse time functions
• Control Functions:
  • Control of circuit breakers and functioning in digital substations
  • Capable of executing protection functions with programmable logic
• Communication Protocols:
  • Supports IEC 61850 for communication in digital substations
  • Modbus for integration with other systems
  • Other protocols such as DNP3 and IEC 60870-5-104
• User Interface:
  • LCD display for easy navigation and monitoring
  • Front panel with programmable function keys
  • Remote access capabilities for monitoring and control
• Power Supply:
  • Typically powered from the power supply network or auxiliary supply with a wide voltage range
• Mechanical and Environmental:
  • Compact design suitable for installation in control panels
  • Designed for robust operation under various environmental conditions
• Dimensions and Weight:
  • Specific dimensions may vary based on the configuration

Product Use

The ABB REF543K is primarily used in the following applications:

• Medium-Voltage Substations: It is suitable for the protection and control of medium-voltage transformers, switchgear, and other equipment in substations.
• Industrial Applications: Ideal for industrial plants where reliable power distribution and protection from faults are crucial.
• Renewable Energy: Can be integrated with renewable energy sources like wind and solar, providing protection and control functionalities.
• Smart Grids: Supports the development of smarter electrical grids with advanced communication capabilities.
• Automation Systems: Can be used in conjunction with other automation systems for improved operational efficiency and reliability.