Answer / sayanta ganguly

Out of all machines Power Transformer have highest
efficiency. Power Transformer is a Static Machine and its
efficiency is nearly 100% that means full efficiency. power
transformer generally operated at full load. Hence,
it is designed such that copper losses are minimal and
efficiency at maximum.

Answer / vimal baldaniya

ofcourse transformer but dry type transformer because it
has less losses compared to other type transformer.

Why different types of connection in transformers are used? (star/star,star/delta,delta/star,delta/delta)Why we are only taking in consideration of star/delta type transformers? if only star/delta is good in practice where doses other type of transformers are used? Note: i want to know place of using different types of transformers other than Star/delta type with brief description.

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