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.


Standard Protective & control elements
  • Thermal Image Transformer
  • Phase overcurrent side H and side L
  • Maximum Residual Overcurrent
  • Residual Overvoltage
  • Ground directional overcurrent
  • Breaker Failure
  • CT Supervision
  • Trip Circuit Supervision
SW Pack optional configuration
  • Thermal with Pt100 Probes