Moth balling 12 MVA oil filled transformer
Moth balling 12 MVA oil filled transformer
(OP)
Does anyone have any suggestions or experience with moth balling two 12 MVA oil filled transformer? We would like to leave them denergized for a year or so and only renergized in an emergency situation. Not sure if its simply a mater of turning off and placing a slight nitrogen purge on top. One transformer is over 40 years and the other about 10 years. Not sure if I need to be concerned about water migrating back into the paper insulation and accelerating the deteriation.






RE: Moth balling 12 MVA oil filled transformer
Some facilities short one winding and energise the other from a low voltage supply, just to keep some warmth in the core. The power required is fairly modest and one or other winding is often suited to direct connection to the LV supply system so it is not a big job.
RE: Moth balling 12 MVA oil filled transformer