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) — complete question paper

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. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.