Re: Oil filled transformer with pressurised nitrogen of 4psi then too vaccum is creating inside transformer, why? Home › Electrical Engineering Forum › General Discussion › Oil filled transformer with pressurised nitrogen of 4psi then too vaccum is creating inside transformer, why? › Re: Oil filled transformer with pressurised nitrogen of 4psi then too vaccum is creating inside transformer, why? 2011/08/27 at 1:46 pm #12440 pillayParticipant It looks like ther is a leak most probably above the oil level, thas why you cannot see any sign of leakage.
