Download PTU B-Tech EEE 2020 Dec 7th Sem 74091 Power System Ii (Switch Gear And Protection) Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 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.
Define the term pilot with reference to power line protection.
2.
What is over fluxing protection in transformer?
3.
What is resistance switching?
4.
Explain the problem associated with the interruption of capacitive current?
5.
What are the types of air blast circuit breaker?
6.
Define operating and resetting time of a relay.
7.
Explain restricted earth fault relay.
8.
Explain RRRV.
9.
What is main advantage of pantograph isolator?
10. Mention two disadvantages of ungrounded neutral.
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SECTION-B
11. Explain construction and working of HRC fuse.
12. Explain the functions of various components used in a substation in brief.
13. Describe the construction and principle of operation of valve type lightning arrester.
14. Explain Arc Extinction phenomena in circuit breaker by high resistance method.
15. Describe the construction and working of Buchholz relay.
SECTION-C
16. a) Explain Time Graded Protection for Radial Feeders.
b) Explain with a neat sketch construction and working of Differential Pilot-Wire
Protection
17. What are the various types of over current relays? Discuss their area of application.
18. a) What is Peterson coil? What protective functions are performed by this device?
b) Determine the inductance of Peterson coil to be connected between the neutral and
ground to neutralize the charging current of overhead line having the line to ground
capacitive of 0.15f. If the supply frequency is 50Hz and the operating voltage is
132 KV, find the KVA rating of the coil.
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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