Circuit breakers usually operate under
A) transient state of short-circuit current
B) sub-transient state of short-circuit current
C) steady state of short-circuit current
D) after D.C. component has ceased
Correct Answer:
Verified
Q11: Thermal overload relays are used to protect
Q12: Magnetic circuit breaker has _ trip action.
A)delayed
B)instantaneous
C)both
Q13: D.C. shunt relays are made of
A)few turns
Q14: The relay operating speed depends upon
A)the spring
Q15: In order that current should flow without
Q17: Circuit breakers are essentially
A)current carrying contacts called
Q18: The current zero interruption, in oil and
Q19: Air blast circuit breaker is used for
A)over
Q20: An efficient and a well designed protective
Q21: Burden of a protective relay is the
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