ABB REF542PLUS

ABB REF542PLUS

The ABB REF542PLUS is a compact and versatile feeder protection relay designed for use in medium voltage distribution networks. It provides comprehensive protection, control, and monitoring functions for feeders, transformers, and motors.

The REF542PLUS offers a range of protection functions, including overcurrent, earth fault, directional earth fault, negative sequence, and thermal overload protection. It also includes advanced features such as auto-reclosing, fault location, and event recording.

The relay is designed for easy installation and configuration, with a user-friendly interface and a range of communication options, including Ethernet, Modbus, and IEC 61850. It also supports remote monitoring and control through ABB’s web-based tool, PCM600.

The ABB REF542PLUS is a protection relay used to protect electrical systems and equipment such as motors, generators, transformers, and switchgear. It is designed to detect abnormal operating conditions and take appropriate actions to prevent damage or failure.

Product Information:

• Manufacturer: ABB
• Model: REF542PLUS
• Type: Protection Relay
• Communication Interface: RS485, IEC 61850, Modbus RTU, Profibus DP
• Input Voltage: 110-240 V AC, 115-125 V DC
• Operating Temperature: -40 to 70°C (-40 to 158°F)
• Mounting: DIN rail or panel mount

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Key Parameters:

1. Protection Functions:
   • Overcurrent protection (51)
   • Earth fault protection (50/51N)
   • Over/under voltage protection (27/59)
   • Over/under frequency protection (81O/U)
   • Directional power protection (32)
   • Motor overload protection (49)
   • Transformer differential protection (87)
   • Generator protection (40/46/64)
   • Breaker failure protection (50BF)
2. Communication Protocols:
   • RS485: Modbus RTU, IEC 60870-5-101/104
   • Ethernet: IEC 61850, Modbus TCP/IP
3. Monitoring Functions:
   • Voltage and current RMS measurements
   • Power and energy measurements
   • Frequency measurement
   • Power factor measurement
   • Harmonic analysis
   • Event and fault recording
4. Control Functions:
   • Trip and close control of circuit breakers
   • Control of motor starters
   • Load shedding and restoration
5. User Interface:
   • LCD display for status and parameter configuration
   • Local keypad for configuration and control
   • PC-based engineering tool for advanced configuration
6. Diagnostics and Maintenance:
   • Self-supervision and self-diagnosis functions
   • Event and fault log for troubleshooting
   • User-configurable maintenance reminders

Please note that the specific product information and parameters may vary depending on the exact model and firmware version of the ABB REF542PLUS protection relay. It is recommended to refer to the product documentation or consult with ABB for the most accurate and up-to-date information.