Proper transformer maintenance needs to include routine inspection and transformer liquid maintenance, repair, and examination, transformer winding insulation maintenance and testing, and any other special maintenance that is suggested by the transformer manufacturer.
Three basic types of transformer oil used are mineral oil, silicone, and bio-based.
The usual lifespan of an oil-filled transformer is around 20-30 years, but some high-voltage models that are kept in pristine conditions can last 50 or 60 years.
Transformers should be serviced every 6 months.
You must ensure that you clean all the bushings of your electrical transformer with soft cotton. Oil conditions should be carefully examined every year.
Silica gel is used to control the amount of moisture available within a breather transformer. Silica gel is used to prevent any extra moisture from entering the transformer which may bring forth many unnecessary damaging effects to the transformer.