The over-voltage surges in power systems may be caused by
A) Lightning
B) Switching
C) Resonance
D) Any of the above.
Correct Answer:
Verified
Q11: Which of the following relays is used
Q12: MHO relay is used for
A)Rectifiers
B)Circuit breakers
C)Transmission lines
D)Feeders.
Q13: Merz-price protection is used on
A)Substations
B)Capacitor bank
C)Induction motor
D)Generators.
Q14: The values of fault current depend on
A)Voltage
Q15: The advantage of neutral earthling is
A)Simplified design
Q17: The protection against over-voltage due to lightening
Q18: Which of the following is a conducting
Q19: In circuit-breakers the contact space is ionized
Q20: Which of the following are air-break switching
Q21: Which of the following statement about SF6
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