Isolation transformer is one that contains two windings: Primary and Secondary winding, that are separated from each other but wound on the same Iron core. The secondary that governs the output is, in this manner, separated from the input. Input and output are totally independent of each other except for the magnetic linkage between the two.
Power line isolation can be provided to avoid component damages when using test instruments.
There are two kinds of Isolation Transformers:
1. Shielded type Isolation Transformer
2. Ultra Isolation Transformer
The results of an Ultra Isolation transformer are:
Due to Delta/Star three limbed construction the input currents get fairly balanced even though there is unbalancing of loads on the output.