The relay operating speed depends upon
A) the spring tension
B) the rate of flux built up
C) armature core air gap
D) all of the above
Correct Answer:
Verified
Q9: Arc in a circuit behaves as
A)a capackive
Q10: Thermal circuit breaker has
A)delayed trip action
B)instantaneous trip
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
Q15: In order that current should flow without
Q16: Circuit breakers usually operate under
A)transient state of
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
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