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
Average overvoltage - 59Uavg
Sequence of Fault Recorder (SFR)
Sequence of event Recorder (SER)

SW PACK OPTIONAL CONFIGURATION

Digital Fault Recorder (DFR)

HW PACK OPTIONAL CONFIGURATION

Thermal with Pt100 Probes - 26

COMMUNICATION FUNCTIONS

Modbus TCP-IP
One USB Type B local port for communication with ThyVisor setup software
Modbus protocol RTU RS485 / IEC 870-5-103 / DNP3
IEC61850 Ed.1 & Ed. 2

DOWNLOADS

NV021 Manual

Flyer NV021

NV021 Coding

PRO-N NV021 IEC 61850 Certificate

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