The most commonly used connections for power systems as a step - up and step - down transformers are

The most commonly used connections for power systems as a step - up an

1.	The most commonly used connections for power systems as a step - up and step - down transformers are
A.	Star - delta, star - star
B.	Delta - star, star - delta
C.	Star - star, delta - delta
D.	Star - delta, delta - star
Answer» E.

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The most commonly used connections for power systems as a step - up and step - down transformers are

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