STUPIDSID
Attempt the following
1(a)
State different rating of circuit breakers.
5 M
1(b)
What do you understand by protected zone and overlapping of protection zone in power system.
5 M
1(c)
Explain time grading and current grading used in protection system.
5 M
1(d)
Explain properties of SF6 gas that make it suitable for arc quenching.
5 M
2(a)
What are the different types of fuse available. Explain the constructional detail of HRC fuse with its advantages over other types.
10 M
2(b)
Explain working principle of induction type of relays. Explain IDMT characteristics.
10 M
3(a)
What are the different types of distance relays. Differentiate them with the help of their characteristics.
10 M
3(b)
Explain construction and working of air circuit breaker.
10 M
4(a)
What are the different kinds of fault that can occur in Induction motor. Explain motor protection against single phasing.
10 M
4(b)
Explain Vacuum circuit breaker with its rating.
10 M
5(a)
Explain the differential protection given to delta star power transformer.
10 M
5(b)
Explain REF protection for alternator. How 100% winding is protected in an alternator.
10 M
Write short note on
6(a)
PLCC protection
10 M
6(b)
Types of isolators and their ratings.
10 M
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