When the protective system for a feeder and a power transformer requires also power measurements and the size and the importance of the transformers increases, NVA100X-P is the most suitable relay for such applications. NVA100X-P provides are also power factor, active and reactive power monitoring and control features on interchange lines, feeders or, generally, on generators and transformers risers.
Specifications
Key: 
standard 
optional 
alternative
Applications
- Feeder
- Transformer
- 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)
- Phase undercurrent (37)
- Directional active underpower (37P)
- Directional reactive underpower (37Q)
- Negative sequence overcurrent for Line / Transformer (46LT)
- Phase reversal (47)
- Thermal image for Line / Transformer (49LT)
- Phase overcurrent (50/51)
- Calculated residual overcurrent (50N(Calc)/51N(Calc))
- Residual overcurrent (50N/51N)
- Minimum power factor (55)
- Overvoltage (59)
- Residual overvoltage (59N)
- Negative seq. overvoltage (59V2)
- Phase directional overcurrent (67)
- Ground directional overcurrent (67N)
- Frequency rate of change (81R)
- Underfrequency & overfrequency (81U 81O)
- High impedance restricted earth fault (87NHIZ)
- Breaker failure (BF)
- Vector jump (DPHI)
- Phase interruption under low-load condition (I2/I1)
Monitoring and control functions
- CB diagnostic
- Check synchronizing relay (25)
- Cold Load Pickup (CLP)
- CTs monitoring (74CT)
- Digital Fault recording (DFR)
- Fault and event logging (SER & SFR)
- Fault Locator (FL)
- 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
- 16 binary inputs + 16 output relays + 16 LEDs + IRIG-B
- 16 binary inputs + 16 output relays + 24 LEDs + 8 Pt100
- 16 binary inputs + 8 output relays + 16 LEDs
- 19/2-inch “4U” rack mounting
- 32 binary inputs + 16 output relays + 16 LEDs
- 400 V standard voltage inputs
- Auxiliary power supply 110-230 Vac/dc
- Auxiliary power supply 24-48 Vac/dc
- Flush mounting
- Front Ethernet port for local interface
- Nominal current 1/5 A selectable by DIP-switch
- One TX (RJ45) port + one FX (optical port) port + RS485
- Standard CT amperometric inputs 1/5 A
- ThySensor amperometric & voltmetric inputs
- Two FX (optical fiber) port + RS485
- Two TX (RJ45) port + RS485
Communication
- IEC 61850 Protocol
- Modbus RTU RS485 / IEC 870-5-103
- Modbus RTU RS485 / IEC 870-5-103 / DNP3 protocol
- Modbus TCP/IP Protocol
- Modbus TCP/IP protocol for local interface