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NVA100

The comprehensive solution for feeders and loss of main protection

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The relay type NVA100 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 and transformer on the same Busbar.
  • In HV, MV and LV electrical machines and network, load shedding and separation of active users from the grid.
NVA100 - Pro-n ()

Specifications


Key:   standard standard optional optional alternative alternative


Applications

  • Feeder
  • Utilities interconnection

Protection functions

  • Overflux (V/Hz) (24)
  • Pt100 thermometric probes (26)
  • Undervoltage (27)
  • Positive seq. undervoltage (27V1)
  • Directional active overpower (32P)
  • Directional reactive overpower (32Q)
  • Directional active underpower (37P)
  • Directional reactive underpower (37Q)
  • Negative sequence overcurrent (46)
  • Thermal image (49)
  • Phase overcurrent (50/51)
  • Residual overcurrent (50N/51N)
  • Voltage-controlled overcurrent (51V)
  • Minimum power factor (55)
  • Overvoltage (59)
  • Residual overvoltage (59N)
  • Negative seq. overvoltage (59V2)
  • Phase directional overcurrent (67)
  • Ground directional overcurrent (67N)
  • Automatic reclosing (79)
  • Frequency rate of change (81R)
  • Underfrequency & overfrequency (81U 81O)
  • High impedance restricted earth fault (87NHIZ)
  • Breaker failure (BF)
  • Phase interruption under low-load condition (I2/I1)

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 24-110 Vac/dc
  • Flush, projecting or rack mounting
  • Flush, projecting, projecting, rack, with separate MMI
  • 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)

Communication

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