What is the difference between onan and onaf

Question

Accepted Answer

Onan and ONAF are two cooling methods used in transformers.

ONAN stands for Oil Natural Air Natural, while ONAF stands for Oil Natural Air Forced.
ONAN is a self-cooling method where the transformer is cooled by natural convection of oil and air, while ONAF uses fans to force air over the transformer.
ONAF is more efficient than ONAN, but also more expensive.
ONAF is used in transformers where the ONAN method is not sufficient to dissipate the heat generated.
The choice between ONAN and ONAF depends on factors such as transformer size, location, and load.

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