Description

Transformers are used generally to increase and decrease voltage in electricity transmission and distribution. With the change in voltage, the current also changes inversely. Mineral oil-filled transformers have types such as ONAN, ONAF, and OFAF, etc., depending on their cooling type. KNAN is other cooling technique for transformers, which means that vegetable oil is used to cool the transformer inner the tank of oil. The letters here mean O: oil, N: Natural, A: Air, F: Forced and, K: Natural Ester (vegetable oils) and as a shorter form give information about the cooling type.