NA60 PHASE&RESIDUAL OVERCURRENT, PHASE&GROUND DIRECTIONAL, THERMAL IMAGE, PHASE UNDER/OVERVOLTAGE, RESIDUAL OVERVOLTAGE

                  

The relay type NA60 can be typically used in radial or meshed MV and LV networks as feeder or power transformer protection:

  • on radial, ring and parallel feeders of any length in solidly grounded, ungrounded, Petersen coil and/or resistance grounded systems

  • on parallel connected generators on the same busbar

Moreover undervoltage and overvoltage functions are provided as protections or voltage controls.

The NA60 relay can be can be shipped with circuits for input phase current suitable for traditional CTs and VTs, or combined ThySensor devices.

NA60 - Pro-n ()

Specifications

Key:   standard standard optional optional alternative alternative

Applications

  • Feeder
  • Generator
  • Transformer

Protection functions

  • Pt100 thermometric probes (26)
  • Undervoltage (27)
  • Thermal image (49)
  • Phase overcurrent (50/51)
  • Residual overcurrent (50N/51N)
  • Overvoltage (59)
  • Residual overvoltage (59N)
  • Phase directional overcurrent (67)
  • Ground directional overcurrent (67N)
  • High impedance restricted earth fault (87NHIZ)
  • Breaker failure (BF)

Monitoring and control functions

  • CB diagnostic
  • Cold Load Pickup (CLP)
  • CTs monitoring (74CT)
  • Digital Fault recording (DFR)
  • Fault and event logging (SER & SFR)
  • Logic selectivity
  • Multiple setting profiles
  • Programmable Logic Controller
  • Second harmonic restraint
  • Self-test
  • Trip circuit supervision (74TCS)
  • VTs monitoring (74VT)

Hardware

  • 100 V standard voltage inputs
  • 2 binary inputs + 6 output relays + 8 LEDs
  • 400 V standard voltage inputs
  • Auxiliary power supply 110-230 Vac/dc
  • Auxiliary power supply 24-48 Vac/dc
  • Flush, projecting, projecting, rack, with separate MMI
  • LPCT amperometric inputs
  • Network module with Ethernet FX port (optical fiber)
  • Network module with Ethernet TX port (copper RJ45) + RS485 port
  • Nominal current 1/5 A selectable by DIP-switch
  • RS485 port (unavailable with Ethernet FX port)
  • Standard CT amperometric inputs 1/5 A
  • ThySensor amperometric & voltmetric inputs

Communication

  • IEC 61850 Protocol
  • Modbus RTU RS232 protocol
  • Modbus RTU RS485 / IEC 870-5-103 / DNP3 protocol
  • Modbus TCP/IP protocol (network board must be provided)