ABB REC670 1MRK004814-AC Protection Relay

ABB REC670 1MRK004814-AC Protection Relay

The ABB REC670 1MRK004814-AC is a numerical protection relay from ABB’s Relion® 670 series, designed for advanced protection, control, and monitoring of power systems in transmission and distribution networks, industrial plants, and renewable energy installations. This relay ensures the reliability, stability, and safety of electrical grids by detecting and isolating faults in real time. Below is a detailed breakdown of its features, technical specifications, and applications.

1. Key Features

• Comprehensive Protection Functions:
  • Line Differential Protection (IED 87L): High-speed fault detection for transmission lines.
  • Distance Protection (IED 21/21FL): Zone-based protection for overhead lines and cables.
  • Overcurrent Protection (IED 50/51, 67): Directional and non-directional overcurrent protection.
  • Earth Fault Protection (IED 50N/51N, 67N): Sensitive ground fault detection.
  • Frequency and Voltage Protection (IED 81/27/59): Under/overfrequency and under/overvoltage protection.
• Advanced Communication:
  • IEC 61850 Ed.2 (GOOSE, MMS, Sampled Values) for seamless integration with substation automation systems (SAS).
  • Modbus RTU/TCP, DNP3, and IEC 60870-5-103/104 for legacy system compatibility.
• Monitoring and Diagnostics:
  • Real-time measurement of voltage, current, power, energy, and harmonics.
  • Event recording, fault reports, and oscillography for post-event analysis.
• Cybersecurity:
  • Role-based access control, encrypted communication (TLS/SSL), and compliance with IEC 62351 standards.
• Robust Design:
  • Operating Temperature: -40°C to +70°C (-40°F to +158°F).
  • High EMC Immunity: Compliant with IEC 60255-26 and IEC 61000-6-5 for harsh environments.
  • Compact and Modular: Front-access design for easy installation and maintenance.

2. Technical Specifications

3. Functional Capabilities

• Automation and Control:
  • GOOSE Messaging: Fast peer-to-peer communication for substation automation.
  • Synchrocheck (IED 25): Automatic synchronization of circuit breakers.
  • Load Shedding: Prevents grid instability during overloads.
• Power Quality Monitoring:
  • Tracks harmonics, flicker, and voltage/current unbalance.
• Disturbance Recording:
  • Stores fault waveforms and sequence of events (SOE) for diagnostics.

4. Applications

• Transmission Networks: Protection of overhead lines, cables, and busbars.
• Distribution Systems: Feeder protection in urban and rural grids.
• Renewable Energy: Integration with wind/solar farms for grid compliance.
• Industrial Plants: Motor and transformer protection in mining, oil & gas, and manufacturing.

5. Integration and Compatibility

• ABB Ecosystem:
  • Compatible with Relion® 670/650 series relays and System 800xA for centralized control.
  • Integrates with ABB PCM600 for configuration and monitoring.
• Third-Party Systems:
  • Supports SCADA, RTUs, and HMIs via IEC 61850, DNP3, or Modbus.

6. Advantages

• High Speed and Accuracy: Ensures rapid fault clearance to minimize downtime.
• Future-Proof Design: Upgradable firmware and support for digital substations.
• User-Friendly Interface: Graphical LCD display and intuitive menu navigation.
• Global Compliance: Meets IEEE, IEC, and regional grid codes.

7. Software Tools

• PCM600: ABB’s engineering tool for relay configuration, testing, and firmware updates.
• DigiVis: Real-time monitoring and analysis of relay data.

8. Ordering and Support

• Replacement Part: Use part number 1MRK004814-AC for direct compatibility.
• Accessories: Mounting kits, CT/VT modules, and communication cables.

9. Summary

The ABB REC670 1MRK004814-AC is a versatile and reliable protection relay that combines advanced protection functions, robust communication, and cybersecurity for modern power systems. Its modular design and compliance with international standards make it ideal for utilities, industries, and renewable energy projects requiring high availability and grid stability.