A star connected, 3-phase, 20 MVA, 6.6 kV alternator has a per phase reactance of 20%. It is protected by merz-price circulating current principle which is set to operate for a fault current of 180 A. Then calculate the reactance per phase of 20% of winding.

A star connected, 3-phase, 20 MVA, 6.6 kV alternator has a per phase reactance of 20%. It is protected by merz-price circulating current principle which is set to operate for a fault current of 180 A. Then calculate the reactance per phase of 20% of winding.

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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Question

A star connected, 3-phase, 20 MVA, 6.6 kV alternator
has a per phase reactance of 20%. It is protected by
merz-price circulating current principle which is set to
operate for a fault current of 180 A. Then calculate the
reactance per phase of 20% of winding.

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