Answer / volkan

It is used for to isolate the system after the secondary
side from the system before the primary side.
These kind of transformers also called as isolation
transformers.

Answer / j.karthik

Thanks for your answer...This type of transformer is only
for isolation purpose or any other purpose???

Answer / amit khamesra

In power circuit , they are called UNIT TRFO. It may either
be used to introduce impedance in the power circuit to
control short circuit current contribution.

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