Why there is no mixing of oil of tap changer and transformer?
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Why there is no mixing of oil of tap changer and transformer?
Why there is no mixing of oil of tap changer and transformer?
When the tap changing takes place arc is struck between the contacts. Due to this the oil inside the tap changer will be highly carbonised. If both oil get mixed up the quality of transformer tank oil will come down. This is not advisable. Hence both oils are kept separately.