Which of the following is the least expensive protection for overcurrent is low voltage system ?
A) Rewireable fuse
B) Isolator
C) Oil circuit breaker
D) Air break circuit breaker
Correct Answer:
Verified
Q12: The time of closing the cycle, in
Q13: Insulation resistance of high voltage circuit breakers
Q14: H.R.C. fuses provide best protection against
A)overload
B)reverse current
C)open-circuits
D)short-circuits
Q15: The ground wire should not be smaller
Q16: The delay fuses are used for the
Q18: Resistance grounding is used for voltage between
A)33kVto66kV
B)HkVto33kV
C)3.3kVandllkV
D)none
Q19: The contacts of high voltage switches used
Q20: In Railway applications _ circuit breaker is
Q21: To protect most of the electrical equipment
Q22: Wave trap is used to trap waves
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