The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to
A) lubricate the contacts
B) insulate the contacts from switch body
C) extinguish the arc
D) all of the above
Correct Answer:
Verified
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
Q17: Which of the following is the least
Q18: Resistance grounding is used for voltage between
A)33kVto66kV
B)HkVto33kV
C)3.3kVandllkV
D)none
Q20: In Railway applications _ circuit breaker is
Q21: To protect most of the electrical equipment
Q22: Wave trap is used to trap waves
Q23: Ungrounded neutral transmission system is not recommended
Q24: The reflection co-efficient at the open circuited
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