An air circuit breaker is a circuit operation breaker that operates in the air as an arc extinguishing medium at a given atmospheric pressure. The market today provides a wide range of air circuit breakers and switching gears that are long-lasting, high-performing, and easy to install and maintain. Air circuit breakers have largely replaced oil circuit breakers. The operation of an air circuit breaker is distinct from that of other types of CBS. CB's basic function is to prevent arcing from resuming wherever the gap between contacts resists the system's recovery voltage. The air circuit breaker works in a similar but distinct manner. An arc voltage is generated in place of the voltage supply when an arc is interrupted. This voltage is defined as the lowest voltage needed to keep the arc going. A circuit breaker can boost the voltage supply in three ways. Cooling the arc plasma increases the arc voltage. When the arc plasma's temperature and particle motion are reduced, an additional voltage gradient is required to keep the arc going. The arc voltage can be increased by splitting the arc into several series. The arc voltage can be increased by lengthening the arc path. As the length of the arc path increases, so does the path of resistance, which raises the arc voltage used across the arc path, allowing the arc voltage to be increased. The maximum operating voltage is 1KV. It has two sets of contacts, one using current and the other using copper. Another pair of contacts can be made from carbon. The first major contact is released when the circuit breaker is flipped. While the major contact is opened, the arcing contact remains connected. When arc contacts are separated, arcing occurs. The circuit breaker is obsolete for average voltage.

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