"The company in Soma made a statement that there was an oil-filled transformer
inside the mine.
Kraft paper is widely used as a form of cellulose insulation in oil-filled transformer
Bob Virtue, chief commanding officer of Lothian and Borders Fire Brigade, said the blaze began in an oil-filled transformer
before spreading to other parts of the building.
It is mainly used in oil-filled transformers
as an insulating and cooling medium.
"The critical materials used in oil-filled transformers
have not changed substantially since these transformers were introduced in the late 19th century.
In addition to askarel units, an estimated 2 million mineral oil-filled transformers