Exam (elaborations)
Exam (elaborations) Electrical Engineering (ENEL3MB)
- Institution
- University Of KwaZulu-Natal (UKZN)
Examination question paper to prepare yourself of the exam
[Show more]
Seller
Follow
Content preview
University of KwaZulu-NatalSchool of Electrical, Electronic and Computer Engineering
Examinations: November 2018
Subject, Course & Code: ELECTRICAL MACHINES 2 – ENEL3MBH2
DURATION: 2 HOURS TOTAL MARKS: 100
Examiners: Dr. R. Pillay Carpanen (Internal)
Dr. R. Tiako (Moderator)
Instructions: Answer ALL Questions. Start answering each
question on a fresh page of the answer booklet.
The use of scientific calculators is permitted but
their memories must be cleared.
QUESTION 1 [46 Marks]
A test taken on a star-connected 55 kVA, 50 Hz, 6-pole synchronous generator
yields the following results:
1. Open-circuit terminal line voltage is 400 V for a dc exciting current of 15 A
2. Using the same dc current, with the armature short-circuited the resulting ac
line current is 171 A.
Calculate the following:
(a) the base impedance of the generator, per phase. [3]
(b) the value of the synchronous reactance. [1]
(c) the per-unit value of XS. [1]
(d) the short-circuit ratio. [1]
Page 1 of 4
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Tyrisc. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R109,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52510 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now