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Which of the following circuit breakers has high reliability and minimum maintenance?

  • Circuit breaker with SF6 gas has high reliability and minimum maintenance.
  • SF6 gas circuit breakers use sulfur hexafluoride (SF6) gas as the arc quenching medium to extinguish the arc that occurs during the interruption of current flow.
  • SF6 gas has excellent arc quenching properties, which makes it very effective in high-voltage applications.
  • SF6 gas circuit breakers require maintenance once every few years, typically between 5 to 10 years, depending on the operating conditions.