Circuit breakers are essentially

Related MCQs

• Circuit breakers usually operate under
• The current zero interruption, in oil and air blast circuit breakers, is achieved by
• The time of closing the cycle, in modern circuit breakers is
• Insulation resistance of high voltage circuit breakers is more than
• Which of the following circuit breakers has high reliability and minimum maintenance ?
• Air blast circuit breakers for 400 kV power system are designed to operate in
• In circuit-breakers the contact space is ionized by
• Which of the following is the demerit of SF6 circuit breakers?
• The arcing contacts in a circuit breaker are made of
• Which of the following medium is employed for extinction of arc in air circuit breaker ?