air blast circuit breaker的意思|示意

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Air blast circuit breaker is a kind of high voltage circuit breaker introduced in the early 20th century. It can carry out fast interrupting operation over a wide frequency range. On the basis of the original air blast circuit breaker, different types are created, such as arc extinguishing chamber, rapid opening and current interruption functions, etc., to realize automatic operation and control, which is commonly used in the power grid system.

Generally speaking, air blast circuit breaker is mainly composed of three parts: air insulating chamber, arc extinguishing chamber, and operating mechanism. Generally, there are two working states: ON state and OFF state. The ON state is the conducting state of the circuit breaker, and the OFF state is the disconnection of the circuit breaker. During the ON state, the movable contact of the circuit breaker will be connected with the fixed contact, and the current passes through the circuit breaker. In this state, the circuit breaker has low resistance and no arc. When the circuit breaker is turned off, the movable contact will separate from the fixed contact, and the current will pass through the arc extinguishing chamber to form an arc. At this time, the air blast circuit breaker will eject air to the arc extinguishing chamber to extinguish the arc, so as to break and disconnect the circuit.

The air blast circuit breaker has the advantages of compact structure, simple operation, high reliability and good adaptability to high voltage and large current circuit. In addition, it has good energy saving effect and is suitable for power grid systems with different load conditions. In addition, its maintenance is simple, and the cost is relatively low. At present, it is widely used in the protection of power system and related industries.