Why and which type of tertiary winding is used in most of the power transforme

Why and which type of tertiary winding is used in most of
the power transformer?

Question Posted / iamdon

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Why and which type of tertiary winding is used in most of the power transformer?..

Answer / iamdon

The primary and secondary windings are used for normal
voltage/current transformation where as the tertiary
winding is used for following special purposes

1)Supply to substation auxiliaries.
2)Connecting static capacitors/synchronous condenser etc

The tertiary winding is connected in delta to allow the
flow of zero sequence current in the tertiary loop in the
case of unbalance.

Author:arbelectbit@yahoo.com

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Why and which type of tertiary winding is used in most of the power transformer?..

Answer / gunasekaran

the above answer is correct another one is keep the neutral
should be zero potential and it is giving closed bath for
third hormonics current

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