GE D30 | Line Distance Protection System

GE D30 | Line Distance Protection System

Cost-effective, high-speed, primary and backup distance protection The D30 is a cost-effective distance protection system suitable for primary protection of sub-transmission lines and as a backup protection for HV, EHV lines, reactors and generators. The D30 provides five zones of phase and ground distance protection along with complete overcurrent and voltage protection functions intended for three-pole tripping applications. The D30 comes with versatile automation features using custom pilot schemes, which can be built


  • Overhead sub-transmission lines and underground cables including series compensated lines
  • Circuits requiring three-pole autoreclosing and independent synchrocheck supervision
  • Circuits with in-zone power transformers
  • Secure application with Capacitively-Coupled Voltage Transformers (CCVTs)
  • Backup protection for generators, transformers and reactors

Key Benefits

  • Cost-effective, five zone quad or mho, phase and ground distance protection
  • Programmable logic for building customized pilot schemes
  • Application flexibility: multiple I/O options, programmable logic (FlexLogic™)
  • Simplified teleprotection interfaces with direct I/O communications hardware for transfer trip and custom-built pilot-aided distance schemes
  • Three independent fiber or copper Ethernet ports for simultaneous/ dedicated network connections with advanced 1 microsecond time synchronization via LAN with IEEE® 1588 support
  • Reduced relay-to-relay wiring and associated installation costs through high-speed inter-relay communications
  • Embedded IEC® 61850 protocol
  • Increase network availability by reducing failover time to zero through IEC 62439-3 "PRP" support
  • CyberSentry™ provides high-end cyber security aligned to industry standards and services (NERC® CIP, AAA, Radius, RBAC, Syslog)
  • Complete IEC 61850 Process Bus solution provides resource optimization and minimizes total P&C life cycle costs

Functional Block Diagram

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