ABB REX521GHHPSH06G Feeder Protection and Control Relay

• Rated Current: Handles current ratings up to 4000 A, adaptable to various system requirements
• Protection Functions:
  • Overcurrent protection (phase and earth fault)
  • Short-circuit protection
  • Overload protection
  • Overvoltage and undervoltage protection
  • Overfrequency and underfrequency protection
  • Negative sequence protection
  • Breaker failure protection
• Measurement Functions:
  • Current, voltage, frequency, active and reactive power, power factor, and energy measurements
  • Current and voltage waveform distortion measurement
• Communication Capabilities:
  • Two independent communication ports
  • RS-485 interface supporting Modbus RTU/ASCII, DNP3.0, and SPA protocols
  • Fiber optic interface supporting IEC 60870-5-103, Modbus RTU/ASCII, DNP3.0, LON, and SPA protocols
• Environmental Conditions:
  • Operating temperature range: -25°C to +55°C
  • Storage temperature range: -40°C to +85°C
  • Relative humidity: 5% to 95% (non-condensing)
  • Protection class: IP65 (dust-tight and protected against water jets)

Functional Characteristics

• High Reliability: Built with high-quality components and rigorous manufacturing processes to ensure stable operation in harsh industrial environments.
• Flexible Configuration: Supports up to 14 different configuration schemes, making it suitable for various neutral grounding systems, including ungrounded, directly grounded, low-resistance grounded, and resonance-grounded systems.
• Comprehensive Monitoring: Provides real-time monitoring of electrical parameters, breaker status, and system health, enabling proactive maintenance and troubleshooting.
• Event and Fault Recording: Records detailed event and fault information, including time-stamped data, for post-event analysis and system optimization.
• User-Friendly Interface: Features a 4×8 character LCD display and a directional keypad for easy parameter setting and querying.
• Self-Diagnostic Function: Continuously monitors the health of the relay and issues alarm signals if any abnormalities are detected, ensuring the reliability of protection functions.

Application Scenarios

• Utility Substations: Used for protecting and controlling feeders in medium-voltage substations, ensuring reliable power supply to residential and commercial areas.
• Industrial Power Systems: Applied in manufacturing plants, process industries, and mining operations to protect critical power equipment and improve system reliability.
• Renewable Energy Integration: Facilitates the integration of renewable energy sources like solar and wind power into the grid by providing reliable protection and control for distributed generation systems.
• Infrastructure Projects: Suitable for urban rail transit, airports, water treatment plants, and natural gas transmission systems to ensure safe and efficient operation of equipment and systems.