Questions:-1. What are the features of star and delta connected windings?2. What will happen if transformers are connected in parallel withoutsatisfying the necessary conditions?3. Out of the conditions for successful parallel operation listed above,state which of the conditions must be strictly satisfied and which of theconditions permit deviation?4. What do you mean by transformer connection Ydl and Dy11?5. Draw the connection diagram for two parallel transformers with (A-A)connected ?6. Why the following connections are not possible for parallel operation?

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1. What are the features of star and delta connected windings?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.51P: The ratings of a three-phase three-winding transformer are Primary(1): Y connected 66kV,15MVA...

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In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across a transformer, the voltage base is changed in proportion to the transformer voltage ratings. (a) True (b) False
For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding? (a) Yes (b) No
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