Fire safety
Retrofilling
The term retrofilling refers to the processof removing the insulating liquid of an
existing working transformer and replacing
it with a new liquid. Usually the fluid being
replaced is mineral oil in distribution
class transformers. Retro-filling of power
transformers requires qualified engineering
assessment as there would probably
need to be design considerations to
accommodate the differences between
mineral oil and vegetable oil. Retro-filling
is not possible with transformers fitted with
breathers.