Overview

The GE FANUC Multilin T60 is a Transformer Protection System designed for various power applications, including autotransformers, generator step-up transformers, split-phase, angle-regulating transformers, and reactors. It utilizes multiple current and voltage inputs to provide primary and backup protection for transformers. Key protection features include differential, ground differential, five distance zones, phase, neutral, ground overcurrent, under and overvoltage, under and overfrequency, over-fluxing, and breaker failure protections.

Protection & Control

• Differential Protection:
  • Dual-slope, dual-breakpoint differential restraint characteristic
  • Restricted and unrestrained differential
  • Inter-turn fault detection
• Harmonic Protection:
  • 2nd harmonic inrush detection
  • Overexcitation inhibit with independent harmonic detection element
• Transformer Overexcitation Protection
• Ground Fault Protection:
  • Restricted ground fault
• Loss-of-Life Monitoring:
  • Aging factor and hottest spot detection
• Backup Distance Protection:
  • Five zones with power swing detection and load encroachment function
• Frequency Protection:
  • Synchrocheck, Rate of Change of Frequency (ROCOF), over and under frequency

Monitoring & Diagnostics

• Metering:
  • Current, voltage, power, energy, frequency, temperature, transformer monitoring
• Synchrophasors:
  • P & M class synchrophasors of voltage, current, and sequence components (1 to 120 frames/sec)
• Oscillography:
  • Analog and digital parameters at 64 samples/cycle
• Event Recorder:
  • 1024 time-tagged events with a 0.5 ms scan of digital inputs
• Data Logger:
  • 16 channels with a sampling rate of up to 1 sample/cycle
• Security Audit Trails:
  • Settings for tracking changes to T60 configurations

Communications

• Ethernet Ports:
  • Three independent 100 Mbps Ethernet ports for dedicated LAN support, eliminating latency effects of heavy traffic protocols on critical communications
• Time-Synch Protocol:
  • Embedded IEEE 1588 time-synch protocol support, eliminating the need for dedicated IRIG-B wiring for IEDs
• High-Speed Data Exchange:
  • Direct I/O secures high-speed binary data exchange between URs
• Network Availability:
  • Reduced failover time to zero through IEC 62439-3 Parallel Redundancy Protocol (PRP), High Availability Seamless Redundancy (HSR), or dual HSR support