What is Oil Circuit Breaker?
What is Oil Circuit Breaker? Basically an oil circuit breaker is a type of high-voltage circuit breaker. When oil is used to extinguish the arc, it is known as an oil circuit breaker. In this type of circuit breaker, oil is used, but mineral oil is preferable. It performs better in insulating properties than air. The rotating contact and the fixed contact are immersed in insulating oil. When the arc forms, the oil vaporizes and decomposes into hydrogen gas. It eventually forms a hydrogen bubble around the bracket. This highly compressed gas bubble prevents the arc from striking again after the current reaches the zero crossing of the arc cycle.