NV021

Loss of mains protection

The relay type NV021 can be typically used in LV distribution systems, on transformers or for electrical machines.
It can be used for system decoupling, load shedding and loss of main (islanding) protection.
The relay complies with CEI 0-21 requirements.


FUNCTIONS


STANDARD PROTECTIVE & CONTROL ELEMENTS

  • Under Voltage - 27
  • Positive Sequence Undervoltage - 27V1
  • Overvoltage - 59
  • Residual Overvoltage - 59N
  • Overfrequency - 81O
  • Underfrequency - 81U
  • Frequency rate of change - 81R
  • Breaker Failure - BF
  • Trip Circuit Supervision - 74TCS
  • Negative sequence overvoltage - 59V2
HW PACK OPTIONAL CONFIGURATION
  • Thermal with Pt100 Probes - 26

COMMUNICATION FUNCTIONS

  • One USB Type B local port for communication with ThyVisor setup software

DOWNLOADS

NV021 Manual
Flyer NV021
NV021 Coding
PRO-N NV021 IEC 61850 Certificate

RELATED PRODUCTS

NV10P

The relay type NV10P can be typically used in HV, MV and LV distribution systems, on transformers or for electrical machines. It can be used for system decoupling, load shedding and loss of main (islanding) protection.

The relay is compliant with CEI-016 requirements

...

XMR-V

XMR-V is a part of XMORE platform, the complete range of IEDs for Medium Voltage application. XMR-V is suitable for Loss of Main Voltage and Frequency protection.

The relay is compliant with CEI-016 requirements

...