Thank you everybody for your time and answers.
I will try and contact the manufacturer for information, but the transformer didn't came with any ONAF ratings.
If they didn't provide any answers, I will test some fans myself. Concerning the ratings I m looking for , I am just looking to improve...
HI
How do I choose fans ( power in kw )to upgrade a 2000 kVA ONAN transformer to ONAF cooling, and what is the optimal position and number of fans .
thank you for any help or reference.