Air Circuit Breaker Working Principle Ppt

By | December 31, 2022



An air circuit breaker working principle is essential to understand in order to stay safe while operating equipment. While these devices are reliable, failure to properly understand their inner workings can cause unnecessary risks. This article explains the basics of an air circuit breaker and its working principle for a better understanding of its potential.

Air circuit breakers utilize several components to work. A conductive switch blade is connected to the rest of the breaker via a series of contact points. When current flows from the AC power source to the load, this switch closes, allowing electricity to flow through. If the electricity exceeds a certain level, the contact points separate, causing the breaker to open and disconnecting the power supply.

The air space between the two contact points is what keeps the breaker open and prevents any dangerous currents from being passed through. As current levels increase, the breaker’s magnetic field begins to increase in strength. The stronger the magnetic field, the greater the force exerted on the contact points, which eventually cause them to separate, thus opening the circuit.

The air circuit breaker working principle also includes a trip rig, which is basically a spring-loaded device that activates the breaker in case of an overload. When the current exceeds a certain amount, the trip rig is triggered and the breaker is opened. The trip rig also acts as a safety mechanism in the event of a short circuit, meaning that it will respond even faster than the magnetic field in order to prevent any serious injury or damage.

Finally, when the current drops below the predetermined level, the switchblade returns to its original position, reconnecting the circuit. This is known as resetting the breaker.

In conclusion, an air circuit breaker working principle is a complex one requiring proper knowledge and understanding in order to safely operate. By understanding the components involved, their purpose, and how they interact with one another, you can ensure that you are using your equipment in the safest possible manner.


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