AAA
NA016

PHASE&RESIDUAL OVERCURRENT

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- PRODUCT DEDICATED TO THE ITALIAN MARKET -

The relay type NA016 is typically used in radial HV, MV and LV networks as feeder or power transformer protection.
In solidly grounded systems the residual overcurrent protection can be used on feeders of any lenght, while in ungrounded or Petersen coil and/or resistance grounded systems, the residual overcurrent protection can be used on feeders of small lenght in order to avoid unwanted trippings due to the capacitive current contribution of the feeder on external ground fault.
The relay complies with CEI 0-16 requirements.

NA016 - Smart line ()

Specifications


Key:   standard standard optional optional alternative alternative


Applications

  • Feeder
  • Transformer

Protection functions

  • Phase overcurrent (50/51)
  • Residual overcurrent (50N/51N)

Monitoring and control functions

  • Digital Fault recording (DFR)
  • Trip circuit supervision (74TCS)

Hardware

  • 3 binary inputs + 4 output relays + 8 LEDs
  • Auxiliary power supply 24-230 Vac/dc
  • Flush mounting
  • LPCT amperometric inputs
  • Nominal current 1/5 A selectable by DIP-switch
  • RS485 port
  • Standard CT amperometric inputs 1/5 A

Communication

  • Modbus RTU RS232 protocol
  • Modbus RTU RS485 / IEC 870-5-103