The GE L90-E00-VKH-F8L-H6A-L6E-NXX-R7C Line Current Differential System offers advanced protection for transmission lines and cables of various voltage levels. It provides high-speed differential protection, ensuring secure, high-performance operation across a range of applications. This system is ideal for overhead lines, underground cables, and circuits with tapped transformer feeders. With synchronized sampling, the system minimizes the impact of communication issues and offers adaptive restraint for internal and external fault protection. The relay supports both single and three-pole tripping with enhanced flexibility for both distance protection and dual-breaker applications.

Technical Specifications

• Differential Protection:
  • Phase-segregated protection ensures secure, high-speed single-pole tripping.
  • Adaptive restraint balances sensitivity for internal faults and security during external faults.
• Distance Protection:
  • 5-zone phase and ground protection with independent compensation settings.
  • Customizable pilot schemes for optimal protection.
• Communication:
  • Three independent Ethernet ports (fiber or copper) support simultaneous/dedicated network connections.
  • IEEE 1588 support for 1-microsecond time synchronization.
  • Synchrophasor support compliant with IEEE C37.118 (2011) and IEC 61850-90-5.
• Cybersecurity:
  • CyberSentry™ security features ensure compliance with modern industry standards.
• Certification:
  • IEC 61850 Ed. 1 & Ed. 2 certified for interoperability with flexible process bus support (IEC 61850-9-2LE, IEC 61869, IEC 61850-9-2 Hardfiber).
• GOOSE Messaging:
  • Routable GOOSE (R-GOOSE) enables protection and control beyond the substation.
• Display and Visualization:
  • Integrated large color display for real-time visualization, bay mimic, annunciator functionality, and graphical phasor views.
• I/O Options:
  • High-density I/O, programmable logic, modularity, and customization options for flexible applications.
• Environmental Conditions:
  • Operating Temperature: -20°C to +60°C
  • Humidity: 5% to 95% relative humidity, non-condensing
  • Dimensions: Compact and modular design suitable for various installation environments.