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

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Roll No. | [ L[ 1] | [ 1] Total No. of Pages : 02
Total No. of Questions : 18

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B.Tech. (Electrical & Electronics)/(Electrical Engineering)/
(Electronics & Electrical) (Sem.=5)
SWITCHGEAR AND PROTECTION
Subject Code : BTEE-504B-18
M.Code : 78704

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INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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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?

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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.

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9. What do you mean by pilot wires?
10. What is meant by fusing current of a fuse?

SECTION-B

11. Explain Restricted Earth Fault protection of Transformers.
12. Discuss the working of Valve type lightening arresters.

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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.

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17. Write a note on following :
    1. Back up protection of bus bars
    2. 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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