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Electrical machines miscellaneous

Electrical Machines

  1. Two three-phase transformers are realized using single-phase transformers as shown in the figure.

    The phase different (in degree) between voltage V1 and V2 is____________.
    1. 3
    2. 5
    3. 15
    4. 30
Correct Option: D

Upper transformer secondary is connected in ∆ Bottom transformer secondary is connected in Y Hence, Phase angle between delta voltage & star voltage is 30°.



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