Download PTU B.Tech 2021 Jan EE 7th Sem 74091 Power System Ii Switch Gear And Protection Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January EE 7th Sem 74091 Power System Ii Switch Gear And Protection Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (EE) PT (Sem.?7)
POWER SYSTEM-II (Switch Gear & Protection)
Subject Code : BTEE-602
M.Code : 74091
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly:
1)
What do you mean by a static relay?
2)
What are the duties performed by a Circuit breaker?
3)
What is meant by back up protection?
4)
Define the term "fusing factor" related to fuse.
5)
What are the functions of a protective relay?
6)
What are the uses of a Buchholz's relay?
7)
What do you understand by RRRV?
8)
Mention any two applications of differential relays.
9)
What do you understand by pick up value of a relay?
10) What are the advantages of air blast circuit breakers over oil circuit breakers?
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SECTION-B
11) Discuss various types of faults in Alternators. Explain Loss of excitation protection in
Generators.
12) Describe the operation of a HRC cartridge fuse.
13) Classify various types of substations. Compare indoor and outdoor types of substations.
14) Explain briefly following terms related to CBs with the help of some diagram :
a) Arc voltage
b) Restriking voltage
15) Discuss the Time graded protection of feeders.
SECTION-C
16) Write a note on following :
a) Negative sequence relay
b) Carrier current protection of lines.
17) With the help of a neat sketch, describe the working of vacuum circuit breakers.
18) Write a note on following :
a) Reactance Relays
b) Ground wires
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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