Circuit breakers usually operate under
A) Steady short circuit current
B) Sub transient state of short circuit current
C) Transient state of short circuit current
D) None of these
Correct Answer:
Verified
Q15: The fuse blows off by
A)burning
B)arcing
C)melting
D)none of the
Q16: On which of the following effects of
Q17: An isolator is installed
A)to operate the relay
Q18: A fuse in a motor circuit provides
Q19: Protection by fuses is generally not used
Q20: A fuse is never inserted in
A)neutral wire
B)negative
Q21: Which of the following circuit breakers is
Q22: The stability of arc in vacuum depends
Q23: SF6 is which type of gas?
A)Electro positive
B)Electro
Q24: What is the average rate of rise
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