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ONAF and OFAF cooling

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2026-01

What is the main difference between ONAF and OFAF cooling?
The main difference between ONAF and OFAF cooling lies in how the transformer oil is circulated.Core DifferenceONAF (Oil Natural Air Forced):Oil circulates naturally inside the transformer and cooler due to temperature-driven convection. Only the airflow is forced by fans.OFAF (Oil Forced Air Forced

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