B.TechSemester 72022-23Power System ProtectionKEE077

Power System Protection (KEE077) - AKTU Question Paper 2022-23

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU Power System Protection Previous Year Question Paper for B.Tech Semester 7, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 7

Session:2022-23

University:AKTU / UPTU

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Questions Asked in 2022-23

Power System Protection (KEE077) — extracted question text

Section AAttempt all questions in brief. 2 x 10 = 20

a
What are the types of protection relays?
b
What is summation transformer?
c
Why Buchholz relay is called gas actuated relay?
d
What are the advantages of differential relay?
e
Discuss about the different kind of fault and their effects
f
Explain Pilot protection schemes
g
What are the steps in test procedure?
h
Explain the properties of arc. (i) Why logic circuit used in protection system? (j) Write the advantages of computer based protection system

Section BAttempt any three of the following: 10 x 3= 30

a
Explain need of power system protection. What are the differen t attributes of protection system? Explain in brief
b
Explain following relays: (i) Shaded pole type induction disc relay (ii) Induction cup type relay
c
Draw the schematic of a Merz-price circulating method of prote cting an alternator .Explain the operating principle
d
Draw & describe the constructio n, working principle of vacuum circuit breaker
e
Explain the working principle of electronic relay and its advantages

Section CAttempt any one part of the following: 10 x 1= 10

a
What is meant by primary protection? Why is back-up required? Discuss different types of back-up protection
b
What are the essential qualities of protective relays? Explain classification of protective scheme
a
Describe the operating principl e, constructional features and area of applications distance relays or directional relay
b
Explain stepped a time-distance characteristics of three distance relaying units used for first, second and third zones of protection
a
Briefly explain the various methods of overvoltage protection of overhead transmission line
b
Explain in detail about the operating principle of reverse pow er protection of alternator
a
Briefly explain about the re-striking voltage transient and th e arc interruption methods
b
Write the short notes on: (i) SF6 Circuit breaker (ii) Bulk oil Circuit breaker
a
With the help of neat & clean diagram explain the microprocess or based digital static relay protection system
b
What is level detector? Explain PNP and NPN transistor as level detector

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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