Download PTU B.Tech 2021 Jan EE 5th Sem 78704 Switchgear And Protection Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January EE 5th Sem 78704 Switchgear And Protection Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.T ech. (Electrical & Electronics)/(Electr ical Engineering)/
(Electronics & Electrical) (Sem.?5)
SWITCHGEAR AND PROTECTION
Subject Code : BTEE-504B-18
M.Code : 78704
Time : 3 Hrs. Max. Marks : 60
INST RUCT ION TO 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
Answer briefly :
1)
What are the limitations of static relays?
2)
Name the various faults occurring in transformers.
3)
What is meant by Zone of protection?
4)
What are the duties of a Circuit breaker?
5)
Explain over fluxing protection of transformers.
6)
Explain the term plug setting of a relay.
7)
What are the functions of protective relays?
8)
Differentiate a fuse and CB.
9)
What do you mean by pilot wires?
10) What is meant by fusing current of a fuse?
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SECTION-B
11) Explain Restricted Earth Fault protection of Transformers.
12) Discuss the working of Valve type lightening arresters.
13) Discuss the current balance differential protection of feeders.
14) Explain various theories of arc extinction in CBs.
15) Discuss the working of Thermal Relays.
SECTION-C
16) Discuss the various types of faults occurring in Generators. Explain Differential
protection scheme of Generators.
17) Write a note on following :
a. Back up protection of bus bars
b. Rod Gaps
18) Discuss various types of fuses. Also mention application of each type.
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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