NA30

Grid interconnection protection

The relay type NA30 is typically used in radial MV networks as feeder or power transformer protection: on long radial feeders in ungrounded or Petersen coil and/or high resistance grounded systems on the LV side of parallel connected transformers with any grounding as earth fault protection of parallel connected generators or generator-transformer unit on the same busbar The relay complies with CEI-016 requirements.

FUNCTIONS

Standard Protective & control elements
  • Thermal Image Transformer - 49LT
  • Phase overcurrent side H and side L - 50/51
  • Maximum Residual Overcurrent - 50N/51N
  • Residual Overvoltage - 59N
  • Ground directional overcurrent - 67N
  • Breaker Failure - BF
  • CT Supervision - 74CT
  • Trip Circuit Supervision - 74TCS
SW Pack optional configuration
  • Thermal with Pt100 Probes - 26



COMMUNICATION FUNCTIONS

  • One USB Type B local port for communication with ThyVisor setup software



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