The ratings of a three-phase, three-winding transformer are Primary: Y-connected, 64 kV, 15 MVA Secondary: Y-connected, 12.8 kV, 10 MVA Tertiary: A-connected, 2.7 kV, 5 MVA. Neglecting resistances and exciting current, the leakage reactances are Xps = = 0.12 per unit on a 15 MVA, 64 kV base XPT= 0.11 per unit on a 15 MVA, 64 kV base XST = 0.07 per unit on a 10 MVA, 12.8 kV base. Determine the per-unit reactances of the per-phase equivalent circuit using a base of 15 MVA and 64 kV for the primary. Xp Xs = II 11 p.u. p.u. p.u.

The ratings of a three-phase, three-winding transformer are Primary: Y-connected, 64 kV, 15 MVA Secondary: Y-connected, 12.8 kV, 10 MVA Tertiary: A-connected, 2.7 kV, 5 MVA. Neglecting resistances and exciting current, the leakage reactances are Xps = = 0.12 per unit on a 15 MVA, 64 kV base XPT= 0.11 per unit on a 15 MVA, 64 kV base XST = 0.07 per unit on a 10 MVA, 12.8 kV base. Determine the per-unit reactances of the per-phase equivalent circuit using a base of 15 MVA and 64 kV for the primary. Xp Xs = II 11 p.u. p.u. p.u.

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 3.53P: The ratings of a three-phase, three-winding transformer are Primary: Y connected, 66kV,15MVA...

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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

Please help me..thanks

The ratings of a three-phase, three-winding transformer are
Primary: Y-connected, 64 kV, 15 MVA
Secondary: Y-connected, 12.8 kV, 10 MVA
Tertiary: A-connected, 2.7 kV, 5 MVA.
Neglecting resistances and exciting current, the leakage reactances are
Xps = 0.12 per unit on a 15 MVA, 64 kV base
XPT = 0.11 per unit on a 15 MVA, 64 kV base
XST = 0.07 per unit on a 10 MVA, 12.8 kV base.
Determine the per-unit reactances of the per-phase equivalent circuit using a base of 15 MVA and 64 kV for the primary.
Xp =
Xs
X₁ =
p.u.
p.u.
p.u.

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