Fall 2023
Department of Electrical Engineering
Karachi Campus
ASSIGNMENT No. 2
Course Title:Electrical Machine
Class:
BEE – 5B
Course Instructor:ENGR. M. KHALID
Due Date:
15-11-2023
Course Code: EEN-219
CLO:
2
DATE:
22-10-2023
Max. Marks: 20 Points
INSTRUCTIONS
1.
2.
3.
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5.
6.
Attempt all questions
This is an individual effort task
Only neat and clean handwritten answers will be accepted
Assignment should be done only on A4 size paper
Assignment should be submitted on LMS in due time.
Individual Viva will be taken at the time of assignment submission
Q. 1
I. What components compose the excitation current of a transfonner?
How are they modeled in the transformer 's equivalent circuit?
II. What is the leakage flux in a transfonner? Why is it modeled in a
transformer equivalent circuit as an inductor?
III. Why does the power factor of a load affect the voltage regulation of a
transfonner?
IV. How does the per-Unit system of measurement eliminate the problem of
different voltage levels in a power system?
V. What are the problems associated with the Y - Y three-phase transformer
connection?
Q.2 Solve the following problem exercise of book “Electrical Machinery
Fundamentals” by Stephen J. Chapman.
2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.12
Fall 2023
Department of Electrical Engineering
Karachi Campus
Fall 2023
Department of Electrical Engineering
Karachi Campus