The most suitable and economical connection for small high voltage transformer is?
a. Star-Delta connection
b. Delta-Delta connection
c. Delta-Star connection
d. Star-Star connection
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When star/star connection is used? Explanation: This case is economical for small HV transformers as it minimizes the turns/phase and winding insulation. A neutral connection is possible. However, the Y /Y connection is rarely used because of difficulties associated with the exciting current
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