Question MiCOM P139 relay

[Omc]

Hi

What's mean "Vnom(/©3)" at MICOM P139 Relay ????

Thx

Regards.

[surgeArrester]

Hi OMC,

Vnom is the nominal voltage voltage which means the actual voltage rating of your system. ( most cases of relays)

But in P139, The relay is very clear:

Vnom VT Prim = just the rating of the primary side of VTs

Vnom VT sec = just the rating of the secondary side of VTs

I used Micom S1 Studio

However other relays are different. They requires to input. VT ratio and aside to it, it requires Vnom secondary. This time Vnom means the secondary voltage value at normal system voltages - which depends on your system.