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Application
The relay type NV20 can be used in HV, MV and
LV distribution systems, on transformers or
electical machines.
It can be used for system decoupling, load
shedding and loss of main (islanding)
protection
Funzioni
di protezione
24 - Overflux
27 - Phase undervoltage
27H - Third harmonic undervoltage
27V1 - Direct sequence undervoltage
27V2 - Inverse sequence undervoltage
59 - Phase overvoltage
59N - Residual overvoltage
81O - Overfrequency
81U - Underfrequency
81R - Frequency rate of change
DPHI - Vector jump
BF - Circuit breaker failure |
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