Transformer Temperature Rise in 54C Ambient

in general, dont run ANYTHING beyond 80% of your calculations, imho.

There are many factors that will affect the actual temperature of the windings & core. Ambient is only a small part. The load has the greatest impact.

There is not enough information in your question to clearly answer this so I would strongly suggest you contact the people who manufactured the transformer, send them a sketch of the room layout and any airflows etc. What the range of ambient temperatures are and so on. They can then look at the design of the transformer and the temperature rise test results (assuming one was done) and give you advice on what temperatures to expect and any limitations you need to apply.

Make sure you send them the expected load profile as this will be key to a good answer.

Do not trust the given data. Something always happen and ambient temperature get exceeded. People tend in time connect more load to a transformer. Then blame you for the burnout. Insulation lifetime is sensitively dependent on running temperature. Take them into account, give them the next larger size, and sleep peacefully.

Hi,

Consult immediately transfomer seller/manufacturer my friend before you do anything.He will help!

We consulted ABB about a transformer at Ras Tanura, Saudi and we were supplied with banks of fans to mount under each set of fins. They gave this a 40% increase in power handling.

Not sure what kind of transformer you are talking about, size, power rating, normal percentage loading, natural cooling, is it in a metal enclosure, inside control cabinet, how long has it been in service, or what you mean by plant room. All our switchrooms in that part of the world have air con to keep the temperature well below your 54C.