How the voltage increase and decrease in a transformer?

1 Answer
chandramohanPanakkal
Sep 23, 2017

Tap changers.allow change of voltage in transformers in use.

Explanation:

Secondary will have many taping from winding and will be actuated by an on load/no,load tap changers.
If you are asking how step up or step down that is different matter. More winding on secondary side will increase voltage..Less number of winding will reduce voltage is principle of transformer,.

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