Skip to main content

Developed and maintained
by the NFCC


Overheating transformers and cooling systems

Hazard Knowledge

Transformers generate significant heat and are generally cooled by the circulation of mineral oils. If a transformer overheats, it may rupture; this could result in very hot mineral oil and toxic and/or flammable gases being released.

Some switchgear is also oil-cooled and can rupture in a similar manner to transformers.