Over-current protection relay NA30

for transformersflush-mountIEC

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 Two independent groups of settings are provided. Switching fromprofiles may be operated by means of MMI, binary input and communication. According to the hardware configurations, the NA30 protectionrelay can be shipped in various case styles depending on therequired mounting options (flush, projecting mounting, rack orwith separate operator panel).