What is the use of Isolation Transformer, and Neutral is
using for return path, finally this current is going....
but same time the voltage of the neutral should be below 1
V...

Answer Posted / zahid ali

Dear Friend
Isolation transformer is used between two circuits for
Galvanic isolation. It is used to prevent the damage on the
source circuits, Like PLCs, DCS etc. in case of field
circuit shorted.

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