1. What happen when the two transformers are operated in parallel having un equal turn’s ratio. 2. Why polarity checking is necessary for the parallel operation of single phase transformer. 3. Why the percentage impedance drop of the transformers are kept equal during the parallel operation of the same. 4. Plot cos®; and cos®, against load current for both cases. 1. What happen when the two transformers are operated in parallel having un equalturn's ratio.2. Why polarity checking is necessary for the parallel operation of single phasetransformer.3. Why the percentage impedance drop of the transformers are kept equal duringthe parallel operation of the same.4. Plot cosP, and cos2 against load current for both cases.

1. What happen when the two transformers are operated in parallel having un equal turn’s ratio. 2. Why polarity checking is necessary for the parallel operation of single phase transformer. 3. Why the percentage impedance drop of the transformers are kept equal during the parallel operation of the same

1. What happen when the two transformers are operated in parallel having un equal turn’s ratio. 2. Why polarity checking is necessary for the parallel operation of single phase transformer. 3. Why the percentage impedance drop of the transformers are kept equal during the parallel operation of the same

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 3.34P: Three single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance...

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Concept explainers

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

Question

1. What happen when the two transformers are operated in parallel having un equal
turn's ratio.
2. Why polarity checking is necessary for the parallel operation of single phase
transformer.
3. Why the percentage impedance drop of the transformers are kept equal during
the parallel operation of the same.
4. Plot cosP, and cos2 against load current for both cases.

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